Hail Map for Knox, PA
The Knox, PA area has had 1 report of on-the-ground hail by trained spotters, and has been under severe weather warnings 41 times during the past 12 months. Doppler radar has detected hail at or near Knox, PA on 28 occasions, including 2 occasions during the past year.
| Name: | Knox, PA |
| Where Located: | 60 miles NNE of Pittsburgh, PA |
| Map: | Google Map for Knox, PA |
| Population: | 1146 |
| Housing Units: | 585 |
| More Info: | Search Google for Knox, PA |
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The Top Recent Hail Date for Knox, PA is Wednesday, May 22, 2024 (9th out of 28)
Hail and Wind Damage Spotted near Knox, PA
| Date / Time | Report Details |
|---|---|
| 11/20/2024 5:38 PM EST |
 At 538 pm est, severe thunderstorms were located along a line from 13 miles north of tionesta to 10 miles east of kittanning, or along a line from 22 miles northeast of oil city to 10 miles east of kittanning, moving east at 40 mph (radar indicated). Hazards include 60 mph wind gusts. Expect damage to roofs, siding, and trees. Locations impacted include, punxsutawney, clarion, kittanning, brookville, marienville, knox, rimersburg, reynoldsville, brockway, new bethlehem, tionesta, sykesville, falls creek, rural valley, sligo, big run, dayton, strattanville, summerville and limestone.
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| 11/20/2024 5:20 PM EST |
 Svrpbz the national weather service in pittsburgh has issued a * severe thunderstorm warning for, forest county in northwestern pennsylvania, eastern venango county in northwestern pennsylvania, central armstrong county in west central pennsylvania, clarion county in west central pennsylvania, northeastern indiana county in west central pennsylvania, jefferson pa county in west central pennsylvania, * until 615 pm est. * at 520 pm est, severe thunderstorms were located along a line from 17 miles north of oil city to near ford city, or along a line from 17 miles north of oil city to near kittanning, moving east at 40 mph (radar indicated). Hazards include 60 mph wind gusts. expect damage to roofs, siding, and trees
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| 10/6/2024 6:45 PM EDT |
 At 645 pm edt, a severe thunderstorm was located 16 miles south of franklin, or 14 miles west of knox, moving east at 40 mph (radar indicated). Hazards include 70 mph wind gusts and quarter size hail. Hail damage to vehicles is expected. expect considerable tree damage. wind damage is also likely to mobile homes, roofs, and outbuildings. locations impacted include, knox, parker, sligo, emlenton, clintonville, shippenville, st. Petersburg, eau claire, callensburg, foxburg, cherry valley and boyers.
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| 10/6/2024 6:27 PM EDT |
 Svrpbz the national weather service in pittsburgh has issued a * severe thunderstorm warning for, southwestern venango county in northwestern pennsylvania, northwestern armstrong county in west central pennsylvania, northeastern butler county in west central pennsylvania, southwestern clarion county in west central pennsylvania, * until 700 pm edt. * at 627 pm edt, a severe thunderstorm was located 6 miles northeast of grove city, moving east at 50 mph (radar indicated). Hazards include 70 mph wind gusts and quarter size hail. Hail damage to vehicles is expected. expect considerable tree damage. Wind damage is also likely to mobile homes, roofs, and outbuildings.
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| 8/6/2024 7:31 PM EDT |
 The storms which prompted the warning have weakened below severe limits, and no longer pose an immediate threat to life or property. therefore, the warning has been allowed to expire. however, gusty winds are still possible with these thunderstorms. to report severe weather, contact your nearest law enforcement agency. they will relay your report to the national weather service pittsburgh.
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| 8/6/2024 7:07 PM EDT |
 At 707 pm edt, severe thunderstorms were located along a line extending from near oil city to 10 miles southeast of franklin to 7 miles southwest of knox, moving east at 35 mph (law enforcement). Hazards include 60 mph wind gusts. Expect damage to trees and power lines, resulting in some power outages. locations impacted include, oil city, franklin, clarion, knox, sugarcreek, hasson heights, seneca, sligo, emlenton, strattanville, clintonville, limestone, shippenville, st. Petersburg, corsica, eau claire, kennerdell, callensburg, woodland heights, and foxburg.
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| 8/6/2024 7:07 PM EDT |
 the severe thunderstorm warning has been cancelled and is no longer in effect
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| 8/6/2024 6:45 PM EDT |
 At 644 pm edt, severe thunderstorms were located along a line extending from near sugarcreek to 6 miles southwest of franklin to 11 miles east of grove city, moving east at 35 mph (law enforcement reported widespread wind damage across mercer county). Hazards include 70 mph wind gusts. Trees snapped and uprooted. power outages can be expected. locations impacted include, oil city, franklin, clarion, knox, sugarcreek, tionesta, hasson heights, seneca, harrisville, polk, sligo, emlenton, strattanville, rouseville, clintonville, limestone, shippenville, cooperstown, st. Petersburg, and corsica.
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| 8/6/2024 6:29 PM EDT |
 Svrpbz the national weather service in pittsburgh has issued a * severe thunderstorm warning for, eastern mercer county in northwestern pennsylvania, venango county in northwestern pennsylvania, northeastern butler county in west central pennsylvania, western jefferson county in west central pennsylvania, northwestern armstrong county in west central pennsylvania, clarion county in west central pennsylvania, southwestern forest county in northwestern pennsylvania, * until 730 pm edt. * at 628 pm edt, severe thunderstorms were located along a line extending from 10 miles west of franklin to grove city, moving east at 35 mph (law enforcement reported widespread wind damage across mercer county). Hazards include 70 mph wind gusts. Trees snapped and uprooted. Power outages can be expected.
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| 8/6/2024 2:35 PM EDT |
 The storm which prompted the warning has weakened below severe limits, and no longer poses an immediate threat to life or property. therefore, the warning will be allowed to expire. however, heavy rain is still possible with this thunderstorm. a severe thunderstorm watch remains in effect until 700 pm edt for northwestern and west central pennsylvania. to report severe weather, contact your nearest law enforcement agency. they will relay your report to the national weather service pittsburgh.
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| 8/6/2024 2:27 PM EDT |
 At 227 pm edt, a severe thunderstorm was located 9 miles west of knox, moving east at 40 mph (radar indicated). Hazards include 60 mph wind gusts. Expect damage to trees and power lines, resulting in some power outages. locations impacted include, oil city, knox, hasson heights, seneca, emlenton, clintonville, st. Petersburg, kennerdell, woodland heights, foxburg, fryburg, cherry valley, and cranberry township.
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| 8/6/2024 2:15 PM EDT |
 At 214 pm edt, a severe thunderstorm was located near franklin, moving east at 40 mph (radar indicated). Hazards include 60 mph wind gusts. Expect damage to trees and power lines, resulting in some power outages. locations impacted include, oil city, franklin, knox, sugarcreek, hasson heights, seneca, parker, polk, emlenton, clintonville, st. Petersburg, eau claire, kennerdell, barkeyville, woodland heights, foxburg, fryburg, cherry valley, and cranberry township.
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| 8/6/2024 2:15 PM EDT |
 the severe thunderstorm warning has been cancelled and is no longer in effect
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| 8/6/2024 2:00 PM EDT |
 Svrpbz the national weather service in pittsburgh has issued a * severe thunderstorm warning for, northeastern mercer county in northwestern pennsylvania, venango county in northwestern pennsylvania, northeastern butler county in west central pennsylvania, northwestern armstrong county in west central pennsylvania, northwestern clarion county in west central pennsylvania, southwestern forest county in northwestern pennsylvania, * until 245 pm edt. * at 200 pm edt, a severe thunderstorm was located 7 miles west of franklin, moving east at 40 mph (radar indicated). Hazards include 60 mph wind gusts and penny size hail. expect damage to trees and power lines, resulting in some power outages
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| 8/6/2024 12:32 PM EDT |
 At 1232 pm edt, a severe thunderstorm was located 8 miles northwest of rimersburg, moving east at 30 mph (law enforcement). Hazards include 60 mph wind gusts and quarter size hail. Minor hail damage to vehicles is possible. expect wind damage to trees and power lines, resulting in some power outages. locations impacted include, clarion, knox, rimersburg, east brady, parker, sligo, bruin, shippenville, st. Petersburg, petrolia, karns city, callensburg, fairview, foxburg, and templeton.
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| 8/6/2024 12:28 PM EDT |
 At 1228 pm edt, a severe thunderstorm was located 10 miles west of rimersburg, moving east at 30 mph (radar indicated). Hazards include 60 mph wind gusts and quarter size hail. Minor hail damage to vehicles is possible. expect wind damage to trees and power lines, resulting in some power outages. locations impacted include, clarion, knox, rimersburg, east brady, parker, sligo, emlenton, bruin, shippenville, st. Petersburg, petrolia, karns city, callensburg, fairview, foxburg, and templeton.
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| 8/6/2024 12:22 PM EDT |
 At 1222 pm edt, a severe thunderstorm was located 13 miles west of rimersburg, moving east at 30 mph (radar indicated). Hazards include 60 mph wind gusts and half dollar size hail. Minor hail damage to vehicles is possible. expect wind damage to trees and power lines, resulting in some power outages. locations impacted include, clarion, knox, rimersburg, east brady, parker, sligo, emlenton, bruin, shippenville, st. Petersburg, eau claire, petrolia, karns city, callensburg, fairview, foxburg, cherry valley, hooker, and templeton.
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| 8/6/2024 12:18 PM EDT |
 Svrpbz the national weather service in pittsburgh has issued a * severe thunderstorm warning for, south central venango county in northwestern pennsylvania, northeastern butler county in west central pennsylvania, northwestern armstrong county in west central pennsylvania, southwestern clarion county in west central pennsylvania, * until 100 pm edt. * at 1218 pm edt, a severe thunderstorm was located 14 miles east of slippery rock, or 15 miles west of rimersburg, moving east at 30 mph (radar indicated). Hazards include 60 mph wind gusts and penny size hail. expect damage to trees and power lines, resulting in some power outages
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| 6/26/2024 4:22 PM EDT |
 Svrpbz the national weather service in pittsburgh has issued a * severe thunderstorm warning for, south central forest county in northwestern pennsylvania, central clarion county in west central pennsylvania, northwestern jefferson pa county in west central pennsylvania, * until 500 pm edt. * at 422 pm edt, a developing severe thunderstorm was located 5 miles southwest of clarion, moving northeast at 30 mph (radar indicated). Hazards include 60 mph wind gusts. expect damage to roofs, siding, and trees
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| 5/26/2024 9:23 PM EDT |
 The storms which prompted the warning have weakened below severe limits, and no longer pose an immediate threat to life or property. therefore, the warning will be allowed to expire. however, gusty winds are still possible with these thunderstorms. a severe thunderstorm watch remains in effect until 1100 pm edt for northwestern and west central pennsylvania.
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| 5/26/2024 9:17 PM EDT |
 the severe thunderstorm warning has been cancelled and is no longer in effect
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| 5/26/2024 9:17 PM EDT |
 At 917 pm edt, severe thunderstorms were located along a line extending from 7 miles west of knox to 7 miles southwest of new bethlehem to 7 miles east of kittanning to 9 miles west of indiana, moving northeast at 30 mph (radar indicated). Hazards include 60 mph wind gusts. Expect damage to trees and power lines, resulting in some power outages. locations impacted include, knox, rimersburg, new bethlehem, seneca, rural valley, sligo, emlenton, st. Petersburg, elderton, plumville, kennerdell, callensburg, atwood, cranberry township, templeton, and distant.
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| 5/26/2024 9:05 PM EDT |
 At 904 pm edt, severe thunderstorms were located along a line extending from 12 miles west of knox to near west kittanning to near kittanning to 7 miles east of apollo, moving northeast at 30 mph (radar indicated). Hazards include 60 mph wind gusts. Expect damage to trees and power lines, resulting in some power outages. locations impacted include, kittanning, knox, rimersburg, ford city, new bethlehem, west kittanning, seneca, east brady, rural valley, parker, sligo, emlenton, bruin, west hills, manorville, st. Petersburg, ford cliff, elderton, applewold, and plumville.
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| 5/26/2024 9:05 PM EDT |
 the severe thunderstorm warning has been cancelled and is no longer in effect
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| 5/26/2024 8:52 PM EDT |
 At 852 pm edt, severe thunderstorms were located along a line extending from 12 miles northeast of slippery rock to near west kittanning to near ford city to near apollo, moving northeast at 30 mph (radar indicated). Hazards include 60 mph wind gusts. Expect damage to trees and power lines, resulting in some power outages. Locations impacted include, vandergrift, kittanning, apollo, knox, rimersburg, ford city, leechburg, new bethlehem, west kittanning, north apollo, west leechburg, chicora, orchard hills, seneca, east brady, harrisville, rural valley, parker, oklahoma, and sligo.
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| 5/26/2024 8:52 PM EDT |
 the severe thunderstorm warning has been cancelled and is no longer in effect
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| 5/26/2024 8:39 PM EDT |
 Svrpbz the national weather service in pittsburgh has issued a * severe thunderstorm warning for, southeastern venango county in northwestern pennsylvania, eastern butler county in west central pennsylvania, north central indiana county in west central pennsylvania, northeastern allegheny county in southwestern pennsylvania, northwestern westmoreland county in southwestern pennsylvania, armstrong county in west central pennsylvania, southwestern clarion county in west central pennsylvania, * until 930 pm edt. * at 838 pm edt, severe thunderstorms were located along a line extending from near slippery rock to near sarver to near freeport to near murrysville, moving northeast at 30 mph (radar indicated). Hazards include 60 mph wind gusts. expect damage to trees and power lines, resulting in some power outages
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| 4/17/2024 8:13 PM EDT |
 At 812 pm edt, severe thunderstorms were located along a line extending from 12 miles northwest of rimersburg to near kittanning to near ford city, moving northeast at 65 mph (trained weather spotters). Hazards include 70 mph wind gusts. Trees snapped and uprooted. power outages can be expected. locations impacted include, clarion, kittanning, brookville, knox, rimersburg, ford city, new bethlehem, west kittanning, east brady, rural valley, sligo, dayton, strattanville, summerville, limestone, west hills, hawthorn, shippenville, manorville, and ford cliff. These storms have a history of producing damaging wind.
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| 4/17/2024 8:13 PM EDT |
 the severe thunderstorm warning has been cancelled and is no longer in effect
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| 4/17/2024 8:03 PM EDT |
 At 802 pm edt, severe thunderstorms were located along a line extending from 8 miles north of shanor-northvue to 6 miles northeast of sarver to natrona heights, moving northeast at 65 mph (trained weather spotters). Hazards include 70 mph wind gusts. Trees snapped and uprooted. power outages can be expected. locations impacted include, clarion, kittanning, brookville, knox, rimersburg, new kensington, lower burrell, harrison township, arnold, shanor-northvue, tarentum, natrona heights, brackenridge, ford city, sarver, freeport, new bethlehem, west kittanning, west leechburg, and chicora. These storms have a history of producing damaging wind.
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| 4/17/2024 7:52 PM EDT |
 Svrpbz the national weather service in pittsburgh has issued a * severe thunderstorm warning for, southeastern venango county in northwestern pennsylvania, eastern butler county in west central pennsylvania, northwestern indiana county in west central pennsylvania, northeastern allegheny county in southwestern pennsylvania, western jefferson county in west central pennsylvania, northwestern westmoreland county in southwestern pennsylvania, armstrong county in west central pennsylvania, clarion county in west central pennsylvania, southwestern forest county in northwestern pennsylvania, * until 830 pm edt. * at 751 pm edt, severe thunderstorms were located along a line extending from near shanor-northvue to near sarver to fox chapel, moving northeast at 65 mph (trained weather spotters). Hazards include 70 mph wind gusts. Trees snapped and uprooted. Power outages can be expected.
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| 4/14/2024 7:48 PM EDT |
 Svrpbz the national weather service in pittsburgh has issued a * severe thunderstorm warning for, southeastern venango county in northwestern pennsylvania, northeastern butler county in west central pennsylvania, jefferson county in west central pennsylvania, northern armstrong county in west central pennsylvania, clarion county in west central pennsylvania, * until 830 pm edt. * at 748 pm edt, a severe thunderstorm was located near clarion, moving east at 65 mph (radar indicated). Hazards include 60 mph wind gusts and quarter size hail. Minor hail damage to vehicles is possible. Expect wind damage to trees and power lines, resulting in some power outages.
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| 4/14/2024 6:27 PM EDT |
 New severe thunderstorm warnings have been issued for portions of this warning area, so this originial warning is being allowed to expire. large hail, damaging wind, and frequent lightning are still expected with the ongoing storms. a severe thunderstorm watch remains in effect until 1100 pm edt for western, northwestern and west central pennsylvania.
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| 4/14/2024 6:09 PM EDT |
 At 608 pm edt, severe thunderstorms were located along a line extending from penfield to near rimersburg to 7 miles east of new wilmington, moving east at 65 mph (radar indicated). Hazards include 65 mph wind gusts and half dollar size hail. Minor hail damage to vehicles is possible. expect wind damage to trees and power lines, resulting in some power outages. Locations impacted include, new castle, hermitage, sharon, grove city, clarion, brookville, knox, rimersburg, farrell, slippery rock, reynoldsville, new wilmington, oakwood, brockway, new bethlehem, new castle northwest, mercer, pulaski, sykesville, and falls creek.
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| 4/14/2024 6:09 PM EDT |
 the severe thunderstorm warning has been cancelled and is no longer in effect
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| 4/14/2024 5:54 PM EDT |
 At 554 pm edt, severe thunderstorms were located along a line extending from near brockway to 13 miles southwest of knox to near new wilmington, moving east at 45 mph (radar indicated). Hazards include 65 mph wind gusts and half dollar size hail. Minor hail damage to vehicles is possible. expect wind damage to trees and power lines, resulting in some power outages. Locations impacted include, new castle, hermitage, sharon, grove city, clarion, sharpsville, brookville, knox, rimersburg, farrell, slippery rock, reynoldsville, new wilmington, oakwood, brockway, new bethlehem, new castle northwest, mercer, pulaski, and sykesville.
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| 4/14/2024 5:39 PM EDT |
 Svrpbz the national weather service in pittsburgh has issued a * severe thunderstorm warning for, southern mercer county in northwestern pennsylvania, southern venango county in northwestern pennsylvania, northern lawrence county in western pennsylvania, northern butler county in west central pennsylvania, jefferson county in west central pennsylvania, northern armstrong county in west central pennsylvania, clarion county in west central pennsylvania, south central forest county in northwestern pennsylvania, * until 630 pm edt. * at 539 pm edt, severe thunderstorms were located along a line extending from 8 miles west of portland mills to 12 miles south of franklin to hermitage, moving east at 65 mph (radar indicated). Hazards include 60 mph wind gusts and half dollar size hail. Minor hail damage to vehicles is possible. Expect wind damage to trees and power lines, resulting in some power outages.
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| 4/14/2024 5:31 PM EDT |
 At 530 pm edt, severe thunderstorms were located along a line extending from near marienville to hermitage, moving southeast at 35 mph (radar indicated). Hazards include 60 mph wind gusts and half dollar size hail. Minor hail damage to vehicles is possible. expect wind damage to trees and power lines, resulting in some power outages. Locations impacted include, hermitage, sharon, oil city, grove city, franklin, clarion, sharpsville, knox, greenville, sugarcreek, farrell, tionesta, mercer, hasson heights, stoneboro, seneca, west middlesex, polk, sandy lake, and clark.
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| 4/14/2024 5:19 PM EDT |
 At 519 pm edt, severe thunderstorms were located along a line extending from near marienville to near hermitage, moving southeast at 55 mph (radar indicated). Hazards include 60 mph wind gusts and half dollar size hail. Minor hail damage to vehicles is possible. expect wind damage to trees and power lines, resulting in some power outages. Locations impacted include, hermitage, sharon, oil city, grove city, franklin, clarion, sharpsville, knox, greenville, sugarcreek, farrell, tionesta, mercer, hasson heights, stoneboro, seneca, west middlesex, polk, sandy lake, and clark.
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| 4/14/2024 5:07 PM EDT |
 At 506 pm edt, severe thunderstorms were located along a line extending from 7 miles northeast of tionesta to near sharpsville, moving east at 60 mph (radar indicated). Hazards include 60 mph wind gusts and half dollar size hail. Minor hail damage to vehicles is possible. expect wind damage to trees and power lines, resulting in some power outages. Locations impacted include, hermitage, sharon, oil city, grove city, franklin, clarion, sharpsville, knox, greenville, sugarcreek, farrell, tionesta, mercer, hasson heights, stoneboro, seneca, west middlesex, polk, sandy lake, and clark.
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| 4/14/2024 4:55 PM EDT |
 Svrpbz the national weather service in pittsburgh has issued a * severe thunderstorm warning for, mercer county in northwestern pennsylvania, venango county in northwestern pennsylvania, northwestern armstrong county in west central pennsylvania, northern clarion county in west central pennsylvania, western forest county in northwestern pennsylvania, * until 545 pm edt. * at 455 pm edt, severe thunderstorms were located along a line extending from 9 miles north of tionesta to 6 miles southeast of kinsman, moving southeast at 35 mph (radar indicated). Hazards include 60 mph wind gusts and quarter size hail. Minor hail damage to vehicles is possible. Expect wind damage to trees and power lines, resulting in some power outages.
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| 8/25/2023 1:56 AM EDT |
 The severe thunderstorm warning for southeastern mercer, venango, northeastern lawrence, northern butler, northwestern jefferson, northwestern armstrong, clarion and forest counties will expire at 200 am edt, the storms which prompted the warning have moved out of the area. therefore, the warning will be allowed to expire. a severe thunderstorm watch remains in effect until 300 am edt for western and northwestern pennsylvania.
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| 8/25/2023 1:11 AM EDT |
 At 111 am edt, severe thunderstorms were located along a line extending from 7 miles southeast of guys mills to near grove city to near new castle, moving east at 55 mph (radar indicated). Hazards include 60 mph wind gusts. expect damage to trees and power lines, resulting in some power outages
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| 7/28/2023 2:23 PM EDT |
 At 222 pm edt, a severe thunderstorm was located near knox, moving northeast at 20 mph (radar indicated). Hazards include 60 mph wind gusts and penny size hail. Expect damage to trees and power lines, resulting in some power outages. locations impacted include, knox, shippenville, fryburg, leeper, and cook forest state park. hail threat, radar indicated max hail size, 0. 75 in wind threat, radar indicated max wind gust, 60 mph.
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| 7/28/2023 2:02 PM EDT |
 At 202 pm edt, a severe thunderstorm was located over knox, moving northeast at 20 mph (radar indicated). Hazards include 60 mph wind gusts and penny size hail. expect damage to trees and power lines, resulting in some power outages
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| 7/26/2023 10:38 PM EDT |
 The severe thunderstorm warning for clarion county will expire at 1045 pm edt, the storm which prompted the warning has weakened below severe limits, and has exited the warned area. therefore, the warning will be allowed to expire. however gusty winds and heavy rain are still possible with this thunderstorm.
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| 7/26/2023 10:18 PM EDT |
 At 1017 pm edt, a severe thunderstorm was located near rimersburg, moving northeast at 50 mph (radar indicated). Hazards include 60 mph wind gusts and quarter size hail. Minor hail damage to vehicles is possible. expect wind damage to trees and power lines, resulting in some power outages. locations impacted include, clarion, knox, rimersburg, parker, sligo, emlenton, strattanville, limestone, shippenville, st. petersburg, corsica, callensburg, foxburg, fisher, and leeper. hail threat, radar indicated max hail size, 1. 00 in wind threat, radar indicated max wind gust, 60 mph.
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| 7/26/2023 10:04 PM EDT |
 At 1004 pm edt, a severe thunderstorm was located 10 miles northwest of rimersburg, moving northeast at 30 mph (radar indicated). Hazards include 60 mph wind gusts and quarter size hail. Minor hail damage to vehicles is possible. Expect wind damage to trees and power lines, resulting in some power outages.
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| 7/26/2023 9:27 PM EDT |
 At 927 pm edt, a severe thunderstorm was located 12 miles southwest of knox, moving east at 20 mph (radar indicated). Hazards include 60 mph wind gusts and quarter size hail. Minor hail damage to vehicles is possible. expect wind damage to trees and power lines, resulting in some power outages. locations impacted include, knox, parker, sligo, emlenton, clintonville, shippenville, st. petersburg, eau claire, kennerdell, callensburg, barkeyville, foxburg, cherry valley, boyers, and cranberry township. hail threat, radar indicated max hail size, 1. 00 in wind threat, radar indicated max wind gust, 60 mph.
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| 7/26/2023 9:10 PM EDT |
 At 910 pm edt, a severe thunderstorm was located 9 miles northeast of slippery rock, or 10 miles east of grove city, moving east at 30 mph (radar indicated). Hazards include 60 mph wind gusts and quarter size hail. Minor hail damage to vehicles is possible. expect wind damage to trees and power lines, resulting in some power outages. locations impacted include, knox, parker, sligo, emlenton, clintonville, shippenville, st. petersburg, eau claire, kennerdell, callensburg, barkeyville, foxburg, cherry valley, boyers, and cranberry township. hail threat, radar indicated max hail size, 1. 00 in wind threat, radar indicated max wind gust, 60 mph.
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| 7/26/2023 9:04 PM EDT |
 At 904 pm edt, a severe thunderstorm was located 7 miles northeast of slippery rock, or 8 miles east of grove city, moving east at 30 mph (radar indicated). Hazards include quarter size hail. minor damage to vehicles is possible
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| 7/20/2023 9:02 PM EDT |
 At 902 pm edt, severe thunderstorms were located along a line extending from medix run to 7 miles south of new bethlehem, moving southeast at 40 mph (law enforcement reported trees down). Hazards include 60 mph wind gusts. Expect damage to trees and power lines, resulting in some power outages. locations impacted include, punxsutawney, clarion, kittanning, brookville, marienville, knox, ford city, reynoldsville, brockway, new bethlehem, west kittanning, sykesville, falls creek, rural valley, sligo, big run, dayton, strattanville, summerville, and limestone. hail threat, radar indicated max hail size, <. 75 in wind threat, observed max wind gust, 60 mph.
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| 7/20/2023 8:45 PM EDT |
 At 844 pm edt, severe thunderstorms were located along a line extending from near st. marys to near rimersburg, moving southeast at 40 mph (law enforcement reported trees down and power outages). Hazards include 60 mph wind gusts and penny size hail. Expect damage to trees and power lines, resulting in some power outages. locations impacted include, punxsutawney, clarion, kittanning, brookville, marienville, knox, ford city, reynoldsville, brockway, new bethlehem, west kittanning, sykesville, falls creek, rural valley, sligo, big run, dayton, strattanville, summerville, and limestone. hail threat, radar indicated max hail size, 0. 75 in wind threat, observed max wind gust, 60 mph.
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| 7/20/2023 8:27 PM EDT |
 The severe thunderstorm warning for mercer, venango, lawrence, northern butler, northern jefferson, northwestern armstrong, clarion and forest counties will expire at 830 pm edt, the storms which prompted the warning have moved out of portions of the area. therefore, the warning will be allowed to expire. a new warning covers the new threat. a severe thunderstorm watch remains in effect until 300 am edt for east central ohio, and western, northwestern and west central pennsylvania.
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| 7/20/2023 8:25 PM EDT |
 At 825 pm edt, severe thunderstorms were located along a line extending from johnsonburg to 7 miles northwest of rimersburg, moving southeast at 40 mph (radar indicated). Hazards include 60 mph wind gusts and penny size hail. expect damage to trees and power lines, resulting in some power outages
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| 7/20/2023 8:23 PM EDT | Trees down in clarion county PA, 0.4 miles NE of Knox, PA |
| 7/20/2023 8:18 PM EDT | Report of tree down blocking westbound lane near country farm supply. time estimated based on rada in clarion county PA, 0.9 miles ESE of Knox, PA |
| 7/20/2023 8:02 PM EDT |
 At 801 pm edt, severe thunderstorms were located along a line extending from near james city to 8 miles north of knox to near new wilmington, moving east at 60 mph (law enforcement reported trees down in mercer county). Hazards include 70 mph wind gusts and quarter size hail. Minor hail damage to vehicles is possible. trees snapped and uprooted. power outages can be expected. locations impacted include, new castle, hermitage, sharon, butler, oil city, grove city, franklin, clarion, sharpsville, brookville, marienville, knox, rimersburg, ellwood city, homeacre-lyndora, greenville, sugarcreek, farrell, shanor-northvue, and meridian. thunderstorm damage threat, considerable hail threat, radar indicated max hail size, 1. 00 in wind threat, radar indicated max wind gust, 70 mph.
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| 7/20/2023 7:56 PM EDT |
 At 755 pm edt, severe thunderstorms were located along a line extending from near sheffield to 6 miles southeast of oil city to near farrell, moving east at 60 mph (radar indicated). Hazards include 70 mph wind gusts and quarter size hail. Minor hail damage to vehicles is possible. trees snapped and uprooted. power outages can be expected. locations impacted include, new castle, hermitage, sharon, butler, oil city, grove city, franklin, clarion, sharpsville, brookville, marienville, knox, rimersburg, ellwood city, homeacre-lyndora, greenville, sugarcreek, farrell, shanor-northvue, and meridian. thunderstorm damage threat, considerable hail threat, radar indicated max hail size, 1. 00 in wind threat, radar indicated max wind gust, 70 mph.
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| 7/20/2023 7:40 PM EDT |
 At 740 pm edt, severe thunderstorms were located along a line extending from near chapman state park to sugarcreek to vienna center, moving east at 60 mph (radar indicated). Hazards include 60 mph wind gusts and quarter size hail. Minor hail damage to vehicles is possible. Expect wind damage to trees and power lines, resulting in some power outages.
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| 4/1/2023 1:59 PM EDT |
 At 158 pm edt, severe thunderstorms were located along a line extending from oil city to plum, moving east at 65 mph (radar indicated). Hazards include 60 mph wind gusts. expect damage to trees and power lines, resulting in some power outages
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| 9/22/2022 2:01 AM EDT |
 At 201 am edt, a severe thunderstorm was located near knox, moving east at 50 mph (radar indicated). Hazards include 60 mph wind gusts and quarter size hail. Minor hail damage to vehicles is possible. expect wind damage to trees and power lines, resulting in some power outages. locations impacted include, oil city, clarion, knox, sugarcreek, hasson heights, seneca, shippenville, woodland heights, fryburg, and cranberry township. hail threat, radar indicated max hail size, 1. 00 in wind threat, radar indicated max wind gust, 60 mph.
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| 9/22/2022 1:54 AM EDT |
 At 154 am edt, a severe thunderstorm was located 7 miles south of oil city, moving east at 45 mph (radar indicated). Hazards include 60 mph wind gusts and quarter size hail. Minor hail damage to vehicles is possible. expect wind damage to trees and power lines, resulting in some power outages. locations impacted include, oil city, franklin, clarion, knox, sugarcreek, hasson heights, seneca, polk, clintonville, shippenville, kennerdell, and woodland heights. hail threat, radar indicated max hail size, 1. 00 in wind threat, radar indicated max wind gust, 60 mph.
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| 9/22/2022 1:44 AM EDT |
 At 144 am edt, a severe thunderstorm was located near franklin, moving east at 50 mph (radar indicated). Hazards include 60 mph wind gusts and quarter size hail. Minor hail damage to vehicles is possible. Expect wind damage to trees and power lines, resulting in some power outages.
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| 7/24/2022 8:25 PM EDT |
 The severe thunderstorm warning for east central venango, northwestern jefferson, northern clarion and southern forest counties will expire at 830 pm edt, the storm which prompted the warning has weakened below severe limits, and no longer poses an immediate threat to life or property. therefore, the warning will be allowed to expire.
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| 7/24/2022 8:11 PM EDT |
 At 811 pm edt, a severe thunderstorm was located 8 miles southeast of tionesta, or 12 miles north of clarion, and is nearly stationary (radar indicated). Hazards include 60 mph wind gusts. Expect damage to trees and power lines, resulting in some power outages. locations impacted include, marienville, knox, shippenville, sigel, fryburg, fisher, leeper, clarington, clear creek state park, and cook forest state park. hail threat, radar indicated max hail size, <. 75 in wind threat, radar indicated max wind gust, 60 mph.
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| 7/24/2022 7:58 PM EDT |
 At 758 pm edt, a severe thunderstorm was located 9 miles north of knox, moving east at 30 mph (radar indicated). Hazards include 60 mph wind gusts. expect damage to trees and power lines, resulting in some power outages
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| 6/22/2022 5:42 PM EDT |
 The severe thunderstorm warning for west central jefferson, east central armstrong and central clarion counties will expire at 545 pm edt, the storm which prompted the warning has weakened below severe limits. therefore, the warning will be allowed to expire. however gusty winds are still possible with this thunderstorm. a severe thunderstorm watch remains in effect until 1000 pm edt for west central pennsylvania.
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| 6/22/2022 5:15 PM EDT |
 At 514 pm edt, a severe thunderstorm was located near knox, moving southeast at 20 mph (radar indicated). Hazards include 60 mph wind gusts. Expect damage to trees and power lines, resulting in some power outages. locations impacted include, clarion, brookville, knox, new bethlehem, sligo, strattanville, summerville, limestone, hawthorn, shippenville, corsica, and distant. hail threat, radar indicated max hail size, <. 75 in wind threat, radar indicated max wind gust, 60 mph.
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| 6/22/2022 4:53 PM EDT |
 At 453 pm edt, a cluster of severe thunderstorms was centered near knox, moving southeast at 30 mph (radar indicated). Hazards include 60 mph wind gusts. expect damage to trees and power lines, resulting in some power outages
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| 6/16/2022 4:47 PM EDT |
 At 447 pm edt, a severe thunderstorm was located over rimersburg, moving southeast at 45 mph (radar indicated). Hazards include ping pong ball size hail and 60 mph wind gusts. People and animals outdoors will be injured. expect hail damage to roofs, siding, windows, and vehicles. expect wind damage to trees and power lines, resulting in some power outages. locations impacted include, clarion, knox, rimersburg, new bethlehem, east brady, parker, sligo, emlenton, strattanville, bruin, limestone, and hawthorn. hail threat, radar indicated max hail size, 1. 50 in wind threat, radar indicated max wind gust, 60 mph.
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| 6/16/2022 4:30 PM EDT |
 At 430 pm edt, a severe thunderstorm was located 8 miles west of knox, moving east at 45 mph (radar indicated). Hazards include ping pong ball size hail and 60 mph wind gusts. People and animals outdoors will be injured. expect hail damage to roofs, siding, windows, and vehicles. expect wind damage to trees and power lines, resulting in some power outages. locations impacted include, knox, seneca, emlenton, clintonville, st. petersburg, eau claire, kennerdell, foxburg, cherry valley, and cranberry township. hail threat, observed max hail size, 1. 50 in wind threat, radar indicated max wind gust, 60 mph.
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| 6/16/2022 4:27 PM EDT |
 At 427 pm edt, a severe thunderstorm was located 14 miles northeast of slippery rock, or 14 miles east of grove city, moving southeast at 45 mph (radar indicated). Hazards include ping pong ball size hail and 60 mph wind gusts. People and animals outdoors will be injured. expect hail damage to roofs, siding, windows, and vehicles. Expect wind damage to trees and power lines, resulting in some power outages.
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| 6/16/2022 4:19 PM EDT |
 At 419 pm edt, a severe thunderstorm was located 8 miles south of franklin, moving east at 45 mph (radar indicated). Hazards include golf ball size hail and 60 mph wind gusts. People and animals outdoors will be injured. expect hail damage to roofs, siding, windows, and vehicles. expect wind damage to trees and power lines, resulting in some power outages. locations impacted include, franklin, knox, seneca, polk, emlenton, clintonville, st. petersburg, eau claire, kennerdell, barkeyville, callensburg, and foxburg. thunderstorm damage threat, considerable hail threat, observed max hail size, 1. 75 in wind threat, radar indicated max wind gust, 60 mph.
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| 6/16/2022 4:08 PM EDT |
 At 408 pm edt, a severe thunderstorm was located 9 miles north of grove city, moving east at 45 mph (radar indicated). Hazards include ping pong ball size hail and 60 mph wind gusts. People and animals outdoors will be injured. expect hail damage to roofs, siding, windows, and vehicles. expect wind damage to trees and power lines, resulting in some power outages. locations impacted include, franklin, knox, stoneboro, seneca, polk, sandy lake, emlenton, clintonville, st. petersburg, eau claire, kennerdell, and jackson center. hail threat, radar indicated max hail size, 1. 50 in wind threat, radar indicated max wind gust, 60 mph.
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| 6/16/2022 3:57 PM EDT |
 At 357 pm edt, a severe thunderstorm was located 10 miles northwest of grove city, moving east at 45 mph (radar indicated). Hazards include two inch hail and 60 mph wind gusts. People and animals outdoors will be injured. expect hail damage to roofs, siding, windows, and vehicles. Expect wind damage to trees and power lines, resulting in some power outages.
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| 6/1/2022 8:26 PM EDT |
 At 826 pm edt, a severe thunderstorm was located over new bethlehem, or 7 miles east of rimersburg, moving east at 40 mph (radar indicated). Hazards include 60 mph wind gusts. Expect damage to trees and power lines, resulting in some power outages. locations impacted include, clarion, kittanning, knox, rimersburg, new bethlehem, west kittanning, east brady, rural valley, parker, sligo, worthington, and dayton. hail threat, radar indicated max hail size, <. 75 in wind threat, radar indicated max wind gust, 60 mph.
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| 6/1/2022 8:08 PM EDT |
 At 808 pm edt, a severe thunderstorm was located near rimersburg, moving east at 40 mph (radar indicated). Hazards include 60 mph wind gusts. expect damage to trees and power lines, resulting in some power outages
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| 5/21/2022 8:42 PM EDT |
 The severe thunderstorm warning for venango. northeastern butler. northwestern armstrong and western clarion counties will expire at 845 pm edt. the storms which prompted the warning have weakened below severe limits, and no longer pose an immediate threat to life or property. Therefore, the warning will be allowed to expire.
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| 5/21/2022 8:41 PM EDT | Trees down all around kossut in clarion county PA, 3.7 miles SSE of Knox, PA |
| 5/21/2022 8:21 PM EDT |
 At 821 pm edt, severe thunderstorms were located along a line extending from 6 miles northwest of sugarcreek to 10 miles east of grove city, moving northeast at 45 mph (radar indicated). Hazards include 60 mph wind gusts and quarter size hail. Minor hail damage to vehicles is possible. Expect wind damage to trees and power lines, resulting in some power outages.
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| 8/12/2021 6:10 PM EDT |
 At 608 pm edt, a severe thunderstorm was located 8 miles west of knox, moving east at 30 mph (radar indicated). Hazards include 60 mph wind gusts. expect damage to trees and power lines, resulting in some power outages
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| 8/12/2021 5:07 PM EDT |
 At 507 pm edt, a severe thunderstorm was located over clarion, moving east at 20 mph (radar indicated). Hazards include 60 mph wind gusts. Expect damage to trees and power lines, resulting in some power outages. locations impacted include, clarion, knox, emlenton, strattanville, limestone, shippenville, fryburg, leeper, and cranberry township. hail threat, radar indicated max hail size, <. 75 in wind threat, radar indicated max wind gust, 60 mph.
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| 8/12/2021 5:05 PM EDT |
 At 504 pm edt, a severe thunderstorm was located over knox, moving east at 20 mph (radar indicated). Hazards include 60 mph wind gusts. Expect damage to trees and power lines, resulting in some power outages. locations impacted include, clarion, knox, emlenton, strattanville, limestone, shippenville, fryburg, leeper, and cranberry township. hail threat, radar indicated max hail size, <. 75 in wind threat, radar indicated max wind gust, 60 mph.
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| 8/12/2021 4:53 PM EDT |
 At 453 pm edt, a severe thunderstorm was located near knox, moving east at 15 mph (radar indicated). Hazards include 60 mph wind gusts. Expect damage to trees and power lines, resulting in some power outages. locations impacted include, clarion, knox, emlenton, strattanville, limestone, shippenville, fryburg, leeper, and cranberry township. hail threat, radar indicated max hail size, <. 75 in wind threat, radar indicated max wind gust, 60 mph.
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| 8/12/2021 4:46 PM EDT |
 At 441 pm edt, a severe thunderstorm was located 9 miles west of knox, moving east at 20 mph (radar indicated). Hazards include 60 mph wind gusts. expect damage to trees and power lines, resulting in some power outages
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| 7/20/2021 7:54 PM EDT |
 At 754 pm edt, a severe thunderstorm was located 7 miles southeast of tionesta, or 12 miles north of clarion, moving southeast at 30 mph (radar). Hazards include wind gusts to 60 mph and quarter-size hail. Minor hail damage to vehicles is possible. Expect wind damage to trees and power lines, resulting in some power outages.
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| 7/20/2021 7:42 PM EDT |
 At 741 pm edt, a severe thunderstorm was located 7 miles southwest of tionesta, or 8 miles east of oil city, moving southeast at 25 mph (radar). Hazards include wind gusts to 60 mph and quarter-size hail. Minor hail damage to vehicles is possible. expect wind damage to trees and power lines, resulting in some power outages. Locations impacted include, oil city, knox, sugarcreek, tionesta, hasson heights, seneca, rouseville, shippenville, woodland heights, pleasantville, fryburg, leeper,.
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| 7/20/2021 7:33 PM EDT |
 At 733 pm edt, a severe thunderstorm was located near oil city, moving southeast at 25 mph (radar). Hazards include wind gusts to 60 mph and quarter-size hail. Minor hail damage to vehicles is possible. Expect wind damage to trees and power lines, resulting in some power outages.
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| 7/13/2021 5:16 PM EDT |
 At 515 pm edt, a severe thunderstorm was located over marienville, moving northeast at 40 mph (radar). Hazards include wind gusts to 60 mph. Expect damage to trees and power lines, resulting in some power outages. Locations impacted include, clarion, marienville, knox, strattanville, limestone, shippenville, corsica, sigel, fryburg, kellettville, fisher, leeper, this includes interstate 80 in pennsylvania between mile markers 57 and 75.
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| 7/13/2021 4:47 PM EDT |
 At 447 pm edt, a severe thunderstorm was located near clarion, moving northeast at 40 mph (radar). Hazards include wind gusts to 60 mph. expect damage to trees and power lines, resulting in some power outages
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| 7/13/2021 4:45 PM EDT |
 At 445 pm edt, a severe thunderstorm was located over clarion, moving northeast at 40 mph (radar). Hazards include wind gusts to 60 mph. Expect damage to trees and power lines, resulting in some power outages. locations impacted include, clarion, knox, rimersburg, parker, sligo, emlenton, strattanville, limestone, shippenville, st. Petersburg, callensburg, foxburg, this includes interstate 80 in pennsylvania between mile markers 43 and 68.
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| 7/13/2021 4:11 PM EDT |
 At 411 pm edt, a severe thunderstorm was located 11 miles southwest of rimersburg, moving northeast at 40 mph (radar). Hazards include wind gusts to 60 mph. expect damage to trees and power lines, resulting in some power outages
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| 7/12/2021 8:17 PM EDT |
 At 817 pm edt, a severe thunderstorm was located 11 miles southwest of knox, moving east at 25 mph (radar). Hazards include wind gusts to 60 mph. Expect damage to trees and power lines, resulting in some power outages. locations impacted include, knox, rimersburg, parker, sligo, emlenton, bruin, shippenville, st. Petersburg, eau claire, callensburg, foxburg, cherry valley, this includes interstate 80 in pennsylvania between mile markers 37 and 61.
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| 7/12/2021 8:08 PM EDT |
 At 808 pm edt, a severe thunderstorm was located 14 miles west of rimersburg, moving east at 25 mph (radar). Hazards include wind gusts to 60 mph. Expect damage to trees and power lines, resulting in some power outages. locations impacted include, knox, rimersburg, parker, sligo, emlenton, bruin, shippenville, st. Petersburg, eau claire, callensburg, foxburg, cherry valley, this includes interstate 80 in pennsylvania between mile markers 36 and 61.
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| 7/12/2021 8:00 PM EDT |
 At 759 pm edt, a severe thunderstorm was located 11 miles east of slippery rock, or 14 miles east of grove city, moving east at 25 mph (radar). Hazards include wind gusts to 60 mph. expect damage to trees and power lines, resulting in some power outages
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| 11/15/2020 3:21 PM EST |
 The severe thunderstorm warning for eastern venango, eastern butler, northwestern armstrong, western clarion and northwestern forest counties will expire at 330 pm est, the storms which prompted the warning have moved out of the area. therefore, the warning will be allowed to expire. however gusty winds are still possible with these thunderstorms. a severe thunderstorm watch remains in effect until 400 pm est for northwestern and west central pennsylvania. a severe thunderstorm watch also remains in effect until 600 pm est for northwestern and west central pennsylvania. remember, a severe thunderstorm warning still remains in effect for forest, clarion, armstrong until 400 pm est.
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| 11/15/2020 3:13 PM EST |
 At 312 pm est, severe thunderstorms were located along a line extending from near tionesta to near ford city, moving east at 55 mph (law enforcement). Hazards include wind gusts to 60 mph. expect damage to trees and power lines, resulting in some power outages
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| 11/15/2020 3:11 PM EST |
 At 311 pm est, severe thunderstorms were located along a line extending from near enterprise to near sarver, moving east at 45 mph (law enforcement). Hazards include wind gusts to 60 mph. Expect damage to trees and power lines, resulting in some power outages. Locations impacted include, butler, oil city, kittanning, knox, rimersburg, homeacre-lyndora, sugarcreek, ford city, meadowood, oak hills, sarver, west kittanning, this includes interstate 80 in pennsylvania between mile markers 38 and 58.
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| 11/15/2020 2:53 PM EST |
 At 253 pm est, severe thunderstorms were located along a line extending from 6 miles southwest of titusville to 6 miles south of oak hills, moving east at 45 mph (law enforcement). Hazards include wind gusts to 60 mph. Expect damage to trees and power lines, resulting in some power outages. locations impacted include, butler, oil city, grove city, franklin, kittanning, knox, rimersburg, homeacre-lyndora, sugarcreek, shanor-northvue, meridian, zelienople, this includes the following highways, interstate 79 in pennsylvania between mile markers 86 and 109. Interstate 80 in pennsylvania between mile markers 22 and 58.
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| 11/15/2020 2:40 PM EST |
 At 239 pm est, severe thunderstorms were located along a line extending from 7 miles northwest of sugarcreek to mars, moving east at 45 mph (law enforcement). Hazards include wind gusts to 60 mph. expect damage to trees and power lines, resulting in some power outages
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| 8/28/2020 11:01 AM EDT | Trees and power lines down along rte 338 in kno in clarion county PA, 0.4 miles NE of Knox, PA |
| 8/28/2020 10:11 AM EDT |
 At 1010 am edt, a severe thunderstorm was located near rimersburg, moving east at 40 mph (radar). Hazards include wind gusts to 60 mph. Expect damage to trees and power lines, resulting in some power outages. locations impacted include, clarion, knox, rimersburg, east brady, parker, sligo, bruin, limestone, shippenville, st. Petersburg, petrolia, karns city, this includes interstate 80 in pennsylvania between mile markers 48 and 65.
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| 8/28/2020 10:10 AM EDT | Trees and power lines down along rte 338 in kno in clarion county PA, 0.4 miles NE of Knox, PA |
| 8/28/2020 9:57 AM EDT |
 At 956 am edt, a severe thunderstorm was located near knox, moving east at 45 mph (radar). Hazards include wind gusts to 60 mph. Expect damage to trees and power lines, resulting in some power outages. Locations impacted include, clarion, knox, rimersburg, slippery rock, chicora, seneca, east brady, harrisville, parker, sligo, emlenton, bruin, this includes interstate 80 in pennsylvania between mile markers 31 and 66.
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| 8/28/2020 9:40 AM EDT |
 At 940 am edt, a severe thunderstorm was located 13 miles south of franklin, moving east at 40 mph (radar). Hazards include wind gusts to 70 mph. Trees snapped and uprooted. Power outages can be expected.
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| 8/25/2020 1:12 PM EDT |
 At 112 pm edt, severe thunderstorms were located along a line extending from near rimersburg to 6 miles west of slippery rock, moving southeast at 35 mph (radar). Hazards include wind gusts to 60 mph and quarter-size hail. Minor hail damage to vehicles is possible. Expect wind damage to trees and power lines, resulting in some power outages.
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| 8/25/2020 12:58 PM EDT |
 At 1258 pm edt, severe thunderstorms were located along a line extending from near marienville to 10 miles southwest of franklin, moving southeast at 45 mph (radar). Hazards include quarter-size hail. Minor damage to vehicles is possible. locations impacted include, oil city, grove city, franklin, knox, sugarcreek, mercer, hasson heights, stoneboro, seneca, harrisville, polk, sandy lake, this includes the following highways, interstate 79 in pennsylvania between mile markers 113 and 131. Interstate 80 in pennsylvania between mile markers 14 and 49.
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| 8/25/2020 12:29 PM EDT |
 At 1228 pm edt, severe thunderstorms were located along a line extending from 6 miles west of tionesta to 6 miles southeast of greenville, moving southeast at 45 mph (radar). Hazards include wind gusts to 60 mph and quarter-size hail. Minor hail damage to vehicles is possible. Expect wind damage to trees and power lines, resulting in some power outages.
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| 6/10/2020 10:23 PM EDT |
 At 1023 pm edt, severe thunderstorms were located along a line extending from 9 miles south of meadville to 11 miles east of grove city to 11 miles east of shanor-northvue, moving northeast at 55 mph (radar). Hazards include wind gusts to 60 mph and quarter-size hail. Minor hail damage to vehicles is possible. Expect wind damage to trees and power lines, resulting in some power outages.
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| 6/4/2020 5:11 PM EDT |
 At 510 pm edt, a severe thunderstorm was located near grove city, moving east at 30 mph (radar). Hazards include wind gusts to 60 mph. expect damage to trees and power lines, resulting in some power outages
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| 6/3/2020 9:12 AM EDT | Tree down on tippecanoe road near huckleberry ridge. time estimated from rada in clarion county PA, 4.4 miles NNW of Knox, PA |
| 9/11/2019 5:50 PM EDT |
 At 550 pm edt, a severe thunderstorm was located near knox, moving east at 25 mph (radar). Hazards include wind gusts to 60 mph and quarter-size hail. Hail damage to vehicles. damage to trees and power lines. Locations impacted include, clarion, knox, sligo, strattanville, summerville, limestone, hawthorn, shippenville, corsica, fisher, this includes interstate 80 in pennsylvania between mile markers 47 and 74.
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| 9/11/2019 5:44 PM EDT | Tree was reported down in beaver township in clarion county PA, 1.7 miles N of Knox, PA |
| 9/11/2019 5:35 PM EDT |
 At 535 pm edt, a severe thunderstorm was located near knox, moving east at 25 mph (radar). Hazards include wind gusts to 60 mph. damage to trees and power lines
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| 8/18/2019 5:30 PM EDT |
 At 530 pm edt, a severe thunderstorm was located 8 miles northeast of knox, moving east at 20 mph (radar). Hazards include wind gusts to 60 mph. expect damage to trees and power lines, resulting in some power outages
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| 6/24/2019 8:21 PM EDT |
 The severe thunderstorm warning for southeastern venango, northeastern butler, northwestern armstrong and clarion counties will expire at 830 pm edt, the storms that prompted the warning have weakened below severe limits and no longer pose an immediate threat to life and property. therefore, the warning will be allowed to expire. however, additional rain could result in areas of minor flooding. a severe thunderstorm watch remains in effect until 1000 pm edt for northwestern and west central pennsylvania.
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| 6/24/2019 7:44 PM EDT |
 At 744 pm edt, severe thunderstorms were located along a line extending from 7 miles east of slippery rock to 8 miles northwest of west kittanning, moving northeast at 40 mph (radar). Hazards include wind gusts to 60 mph. expect damage to trees and power lines, resulting in some power outages
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| 6/16/2019 5:20 PM EDT |
 At 520 pm edt, a severe thunderstorm capable of producing a tornado was located 11 miles west of knox, moving east at 25 mph (radar indicated rotation). Hazards include tornado. Flying debris will be dangerous to those caught without shelter. mobile homes will be damaged or destroyed. damage to roofs, windows, and vehicles will occur. tree damage is likely. this dangerous storm will be near, knox around 545 pm edt. other locations impacted by this tornadic thunderstorm include emlenton, foxburg, st. petersburg, shippenville, sligo, callensburg and cherry valley. this includes interstate 80 in pennsylvania between mile markers 39 and 61. Please report severe weather by calling 412-262-1988, posting to the nws pittsburgh facebook page, or using twitter @nwspittsburgh.
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| 5/28/2019 3:24 PM EDT |
 At 324 pm edt, a severe thunderstorm was located 9 miles southwest of knox, moving southeast at 35 mph (radar). Hazards include wind gusts to 60 mph and quarter-size hail. Minor hail damage to vehicles is possible. expect wind damage to trees and power lines, resulting in some power outages. locations impacted include, knox, this includes interstate 80 in pennsylvania between mile markers 50 and 57. A tornado watch remains in effect until 1000 pm edt for west central pennsylvania.
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| 5/28/2019 3:19 PM EDT | Quarter sized hail reported 0.4 miles NE of Knox, PA, picture provided. |
| 5/28/2019 3:15 PM EDT |
 At 315 pm edt, a severe thunderstorm was located 12 miles south of franklin, moving southeast at 35 mph (radar). Hazards include ping pong ball-size hail and wind gusts to 60 mph. People and animals outdoors will be injured. expect hail damage to roofs, siding, windows, and vehicles. expect wind damage to trees and power lines, resulting in some power outages. locations impacted include, knox, sligo, emlenton, st. petersburg, callensburg, foxburg, this includes interstate 80 in pennsylvania between mile markers 44 and 57. A tornado watch remains in effect until 1000 pm edt for northwestern and west central pennsylvania.
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| 5/28/2019 3:04 PM EDT |
 At 304 pm edt, a severe thunderstorm was located 9 miles south of franklin, moving southeast at 35 mph (radar). Hazards include golf ball size-hail and wind gusts to 60 mph. People and animals outdoors will be injured. expect hail damage to roofs, siding, windows, and vehicles. expect wind damage to trees and power lines, resulting in some power outages. locations impacted include, knox, parker, sligo, emlenton, st. petersburg, kennerdell, callensburg, foxburg, cherry valley, this includes interstate 80 in pennsylvania between mile markers 37 and 57. A tornado watch remains in effect until 1000 pm edt for northwestern and west central pennsylvania.
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| 5/28/2019 2:54 PM EDT |
 At 253 pm edt, a severe thunderstorm was located 9 miles southwest of sugarcreek, or 9 miles southwest of franklin, moving southeast at 35 mph. this is a very dangerous storm (radar). Hazards include destructive, baseball-size hail and wind gusts to 70 mph. People and animals outdoors will be severely injured. Expect shattered windows, extensive damage to roofs, siding, and vehicles.
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| 5/23/2019 6:46 PM EDT |
 At 646 pm edt, a severe thunderstorm was located near oil city, moving east at 55 mph (radar). Hazards include wind gusts to 60 mph and quarter-size hail. Minor hail damage to vehicles is possible. Expect wind damage to trees and power lines, resulting in some power outages.
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| 4/14/2019 8:19 PM EDT |
 At 819 pm edt, severe thunderstorms were located along a line extending from near tionesta to near knox, moving east at 35 mph (radar). Hazards include wind gusts to 55 mph. Expect damage to trees and power lines, resulting in some power outages. Locations impacted include, knox, shippenville, fryburg, a tornado watch remains in effect until 300 am edt for northwestern and west central pennsylvania.
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| 4/14/2019 8:06 PM EDT |
 At 806 pm edt, severe thunderstorms were located along a line extending from 7 miles east of oil city to 9 miles west of knox, moving east at 35 mph (radar). Hazards include wind gusts to 60 mph. Expect damage to trees and power lines, resulting in some power outages. locations impacted include, oil city, knox, sugarcreek, seneca, shippenville, kennerdell, woodland heights, fryburg, cranberry township, this includes interstate 80 in pennsylvania between mile markers 38 and 39. A tornado watch remains in effect until 300 am edt for northwestern and west central pennsylvania.
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| 4/14/2019 8:05 PM EDT |
 At 805 pm edt, severe thunderstorms were located along a line extending from near knox to 11 miles northwest of west kittanning, moving east at 65 mph (radar). Hazards include wind gusts to 60 mph. Expect damage to trees and power lines, resulting in some power outages. locations impacted include, butler, clarion, knox, rimersburg, homeacre-lyndora, shanor-northvue, meadowood, oak hills, chicora, east brady, parker, east butler, this includes interstate 80 in pennsylvania between mile markers 35 and 36, and between mile markers 38 and 62. A tornado watch remains in effect until 300 am edt for northwestern and west central pennsylvania.
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| 4/14/2019 7:59 PM EDT |
 At 758 pm edt, severe thunderstorms were located along a line extending from near oil city to 13 miles west of knox, moving east at 35 mph (radar). Hazards include wind gusts to 60 mph. Expect damage to trees and power lines, resulting in some power outages. locations impacted include, oil city, franklin, knox, sugarcreek, seneca, clintonville, shippenville, kennerdell, woodland heights, fryburg, cranberry township, this includes interstate 80 in pennsylvania between mile markers 32 and 38. A tornado watch remains in effect until 300 am edt for northwestern and west central pennsylvania.
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| 4/14/2019 7:56 PM EDT |
 At 756 pm edt, severe thunderstorms were located along a line extending from 12 miles west of knox to near shanor-northvue, moving east at 65 mph (radar). Hazards include wind gusts to 55 mph. Expect damage to trees and power lines, resulting in some power outages. locations impacted include, butler, clarion, rimersburg, homeacre-lyndora, shanor-northvue, meridian, meadowood, oak hills, chicora, east brady, parker, east butler, this includes interstate 80 in pennsylvania between mile markers 38 and 62. A tornado watch remains in effect until 300 am edt for northwestern and west central pennsylvania.
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| 4/14/2019 7:46 PM EDT |
 At 746 pm edt, severe thunderstorms were located along a line extending from near franklin to 8 miles east of grove city, moving east at 35 mph (radar). Hazards include wind gusts to 60 mph. expect damage to trees and power lines, resulting in some power outages
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| 4/14/2019 7:45 PM EDT |
 At 745 pm edt, severe thunderstorms were located along a line extending from 6 miles east of grove city to near meridian, moving east at 65 mph (radar). Hazards include wind gusts to 60 mph. expect damage to trees and power lines, resulting in some power outages
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| 9/21/2018 7:47 PM EDT |
 At 746 pm edt, severe thunderstorms were located along a line extending from near tionesta to 12 miles west of rimersburg, moving east at 30 mph (radar). Hazards include wind gusts to 60 mph. Expect damage to trees and power lines, resulting in some power outages. Locations impacted include, clarion, knox, rimersburg, parker, sligo, strattanville, shippenville, callensburg, fisher, this includes interstate 80 in pennsylvania between mile markers 52 and 67.
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| 9/21/2018 7:40 PM EDT | Tree down on powerlines in richland townshi in clarion county PA, 4.6 miles NNW of Knox, PA |
| 9/21/2018 7:35 PM EDT |
 A severe thunderstorm warning remains in effect until 800 pm edt for northeastern butler. northwestern jefferson. northwestern armstrong. clarion and southern forest counties. At 734 pm edt, severe thunderstorms were located along a line extending from near tionesta to 11 miles east of slippery rock, moving east at 30 mph.
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| 9/21/2018 7:25 PM EDT |
 A severe thunderstorm warning remains in effect until 800 pm edt for southeastern venango. northeastern butler. northwestern jefferson. northwestern armstrong. clarion and southern forest counties. At 725 pm edt, severe thunderstorms were located along a line extending from near tionesta to 8 miles east of slippery rock, moving.
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| 9/21/2018 7:14 PM EDT |
 The national weather service in pittsburgh has issued a * severe thunderstorm warning for. southeastern mercer county in northwestern pennsylvania. southeastern venango county in northwestern pennsylvania. northeastern butler county in west central pennsylvania. Northwestern jefferson county in west central pennsylvania.
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| 9/21/2018 6:57 PM EDT |
 At 657 pm edt, severe thunderstorms were located along a line extending from near tionesta to near grove city, moving east at 60 mph (radar). Hazards include wind gusts to 60 mph. Expect damage to trees and power lines, resulting in some power outages. locations impacted include, oil city, grove city, franklin, knox, sugarcreek, slippery rock, tionesta, hasson heights, seneca, harrisville, parker, polk, this includes the following highways, interstate 79 in pennsylvania between mile markers 109 and 121. Interstate 80 in pennsylvania between mile markers 15 and 56.
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| 9/21/2018 6:48 PM EDT |
 A severe thunderstorm warning remains in effect until 715 pm edt for eastern mercer. venango. northeastern lawrence. northern butler. northwestern armstrong. western clarion and southwestern forest counties. At 648 pm edt, severe thunderstorms were located along a line extending from oil city to near grove city, moving east at 50 mph.
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| 9/21/2018 6:32 PM EDT |
 At 631 pm edt, a line of thunderstorms were located along a line extending from sugarcreek to near new wilmington, moving east at 60 mph (radar). Hazards include wind gusts to 60 mph. expect damage to trees and power lines, resulting in some power outages
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| 6/18/2018 10:35 PM EDT |
 At 1035 pm edt, severe thunderstorms were located along a line extending from near dubois to near new bethlehem, moving east at 45 mph (radar). Hazards include wind gusts to 60 mph. Expect damage to trees and power lines, resulting in some power outages. This includes interstate 80 in pennsylvania between mile markers 51 and 96.
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| 6/18/2018 10:26 PM EDT |
 At 1025 pm edt, severe thunderstorms were located along a line extending from brockway to 6 miles south of clarion, moving southeast at 45 mph (radar). Hazards include wind gusts to 60 mph. expect damage to trees and power lines, resulting in some power outages
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| 6/18/2018 10:22 PM EDT |
 The severe thunderstorm warning for east central mercer, southern venango, northwestern jefferson, northern clarion and southwestern forest counties will expire at 1030 pm edt, the storms that prompted the warning have weakened below severe limits and have exited the warned area. therefore, the warning will be allowed to expire. however heavy rain is still possible with these thunderstorms.
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| 6/18/2018 10:08 PM EDT |
 At 1007 pm edt, severe thunderstorms were located along a line extending from 10 miles northeast of clarion to knox to 11 miles south of franklin, moving southeast at 30 mph (radar). Hazards include wind gusts to 60 mph. Expect damage to trees and power lines, resulting in some power outages. This includes interstate 79 in pennsylvania near mile marker 98.
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| 6/18/2018 10:05 PM EDT |
 At 1005 pm edt, severe thunderstorms were located along a line extending from near portland mills to knox, moving southeast at 55 mph (radar). Hazards include wind gusts to 60 mph. Expect damage to trees and power lines, resulting in some power outages. This includes interstate 80 in pennsylvania between mile markers 51 and 96.
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| 6/18/2018 9:57 PM EDT |
 At 957 pm edt, severe thunderstorms were located along a line extending from 7 miles west of portland mills to near knox, moving southeast at 35 mph (radar). Hazards include wind gusts to 60 mph. expect damage to trees and power lines, resulting in some power outages
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| 6/18/2018 9:27 PM EDT |
 At 926 pm edt, severe thunderstorms were located along a line extending from near enterprise to near franklin to near greenville, moving east at 50 mph (radar). Hazards include wind gusts to 60 mph. expect damage to trees and power lines, resulting in some power outages
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| 6/18/2018 3:22 PM EDT | Trees down on beaver furnace r in clarion county PA, 2.9 miles NW of Knox, PA |
| 6/18/2018 3:19 PM EDT |
 At 318 pm edt, a severe thunderstorm was located near rimersburg, moving east at 45 mph (radar). Hazards include wind gusts to 60 mph. expect damage to trees and power lines, resulting in some power outages
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| 5/4/2018 4:55 PM EDT | Numerous trees down. one home with major damage... one with minor damage. damage to a storage she in clarion county PA, 4 miles WNW of Knox, PA |
| 5/4/2018 4:48 PM EDT | Storm damage reported in clarion county PA, 0.4 miles NE of Knox, PA |
| 5/4/2018 4:45 PM EDT |
 At 445 pm edt, severe thunderstorms were located along a line extending from 6 miles northwest of knox to 14 miles southeast of franklin to 10 miles east of slippery rock, moving east at 45 mph (radar). Hazards include wind gusts to 60 mph. Expect damage to trees and power lines, resulting in some power outages. locations impacted include, knox, parker, emlenton, bruin, clintonville, shippenville, st. Petersburg, eau claire, kennerdell, callensburg, foxburg, cherry valley, this includes interstate 80 in pennsylvania between mile markers 34 and 59.
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| 5/4/2018 4:26 PM EDT |
 At 425 pm edt, severe thunderstorms were located along a line extending from 6 miles north of grove city to near new wilmington to near new castle northwest, moving east at 75 mph (radar). Hazards include wind gusts to 60 mph. expect damage to trees and power lines, resulting in some power outages
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| 11/5/2017 8:10 PM EST |
 At 810 pm est, severe thunderstorms were located along a line extending from 11 miles southwest of chapman state park to near rimersburg, moving east at 50 mph (radar). Hazards include 60 mph wind gusts. Expect damage to trees and power lines, resulting in some power outages. Locations impacted include, clarion, knox, rimersburg, new bethlehem, tionesta, east brady, sligo, strattanville, limestone, hawthorn, shippenville, callensburg, this includes interstate 80 in pennsylvania between mile markers 49 and 72.
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| 11/5/2017 7:51 PM EST |
 At 750 pm est, severe thunderstorms were located along a line extending from near enterprise to 8 miles northeast of shanor-northvue, moving east at 50 mph (radar). Hazards include 60 mph wind gusts. Expect damage to trees and power lines, resulting in some power outages. Locations impacted include, oil city, franklin, clarion, knox, rimersburg, sugarcreek, new bethlehem, tionesta, hasson heights, seneca, east brady, parker, this includes interstate 80 in pennsylvania between mile markers 33 and 72.
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| 11/5/2017 7:26 PM EST |
 At 726 pm est, severe thunderstorms were located along a line extending from near guys mills to 7 miles west of slippery rock, moving east at 50 mph (radar). Hazards include 60 mph wind gusts. expect damage to trees and power lines, resulting in some power outages
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| 8/22/2017 1:48 PM EDT |
 At 147 pm edt, a severe thunderstorm was located near knox, moving east at 40 mph (radar). Hazards include 60 mph wind gusts. Damage to trees and power lines. locations impacted include, clarion, knox, seneca, emlenton, shippenville, st. Petersburg, fryburg, cranberry township, this includes interstate 80 in pennsylvania between mile markers 45 and 59.
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| 8/22/2017 1:23 PM EDT |
 At 123 pm edt, a severe thunderstorm was located 8 miles northeast of grove city, moving east at 40 mph (radar). Hazards include 60 mph wind gusts. damage to trees and power lines
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| 8/4/2017 7:39 PM EDT |
 The severe thunderstorm warning for northwestern armstrong and southwestern clarion counties will expire at 745 pm edt, the storm that prompted the warning has moved out of the area. therefore, the warning will be allowed to expire. a severe thunderstorm watch remains in effect until 900 pm edt for northwestern and west central pennsylvania.
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| 8/4/2017 7:30 PM EDT |
 At 730 pm edt, a severe thunderstorm was located over clarion, moving east at 35 mph (radar). Hazards include 60 mph wind gusts. expect damage to trees and power lines, resulting in some power outages
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| 8/4/2017 7:20 PM EDT |
 At 720 pm edt, a severe thunderstorm was located near knox, moving northeast at 45 mph (radar). Hazards include 60 mph wind gusts. Expect damage to trees and power lines, resulting in some power outages. locations impacted include, knox, sligo, shippenville, st. Petersburg, callensburg, this includes interstate 80 in pennsylvania between mile markers 46 and 61.
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| 8/4/2017 7:05 PM EDT |
 At 704 pm edt, a severe thunderstorm was located 8 miles north of shanor-northvue, or 11 miles north of butler, moving northeast at 45 mph (radar). Hazards include 60 mph wind gusts. Expect damage to trees and power lines, resulting in some power outages. locations impacted include, knox, rimersburg, chicora, east brady, parker, sligo, emlenton, bruin, shippenville, st. Petersburg, eau claire, petrolia, this includes interstate 80 in pennsylvania between mile markers 35 and 61.
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| 8/4/2017 6:46 PM EDT |
 At 646 pm edt, a severe thunderstorm was located 8 miles south of slippery rock, or 12 miles northwest of butler, moving northeast at 40 mph (radar). Hazards include 60 mph wind gusts. expect damage to trees and power lines, resulting in some power outages
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| 8/4/2017 3:58 PM EDT |
 At 357 pm edt, a severe thunderstorm was located near clarion, moving northeast at 45 mph (radar). Hazards include 60 mph wind gusts. Damage to trees and power lines. Locations impacted include, clarion, brookville, marienville, knox, sligo, strattanville, limestone, shippenville, corsica, sigel, fryburg, fisher, this includes interstate 80 in pennsylvania between mile markers 51 and 78.
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| 8/4/2017 3:45 PM EDT |
 At 345 pm edt, a severe thunderstorm was located near clarion, moving northeast at 45 mph (radar). Hazards include 60 mph wind gusts. damage to trees and power lines
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| 6/29/2017 6:23 PM EDT |
 At 1023 pm edt, a severe thunderstorm was located 10 miles west of knox, moving east at 40 mph (radar). Hazards include 60 mph wind gusts. Expect damage to trees and power lines, resulting in some power outages. locations impacted include, grove city, clarion, knox, emlenton, clintonville, shippenville, st. Petersburg, kennerdell, barkeyville, fryburg, cherry valley, cranberry township, this includes interstate 80 in pennsylvania between mile markers 22 and 63.
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| 6/29/2017 6:01 PM EDT |
 At 1001 pm edt, a severe thunderstorm was located near grove city, moving east at 40 mph (radar). Hazards include 60 mph wind gusts. expect damage to trees and power lines, resulting in some power outages
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| 6/18/2017 4:25 PM EDT |
 At 425 pm edt, severe thunderstorms were located along a line extending from 9 miles northwest of marienville to 8 miles east of butler, moving east at 15 mph (radar). Hazards include 60 mph wind gusts. Expect damage to trees and power lines, resulting in some power outages. Locations impacted include, butler, clarion, brookville, marienville, knox, rimersburg, homeacre-lyndora, shanor-northvue, meridian, new bethlehem, tionesta, chicora, this includes interstate 80 in pennsylvania between mile markers 40 and 85.
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| 6/18/2017 3:57 PM EDT |
 At 356 pm edt, severe thunderstorms were located along a line extending from 9 miles north of tionesta to shanor-northvue, moving east at 40 mph (radar). Hazards include 60 mph wind gusts. expect damage to trees and power lines, resulting in some power outages
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| 6/18/2017 3:31 PM EDT |
 At 331 pm edt, severe thunderstorms were located along a line extending from near titusville to near oil city to 8 miles east of grove city, moving east at 50 mph (radar). Hazards include 60 mph wind gusts. Expect damage to trees and power lines, resulting in some power outages. Locations impacted include, oil city, grove city, franklin, clarion, knox, sugarcreek, tionesta, hasson heights, seneca, polk, sandy lake, emlenton, this includes interstate 80 in pennsylvania between mile markers 21 and 63, and between mile markers 65 and 66.
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| 6/18/2017 3:14 PM EDT |
 At 314 pm edt, severe thunderstorms were located along a line extending from 9 miles south of guys mills to 6 miles west of sugarcreek to near grove city, moving east at 50 mph (radar). Hazards include 60 mph wind gusts. expect damage to trees and power lines, resulting in some power outages
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| 5/28/2017 4:45 PM EDT |
 At 444 pm edt, a severe thunderstorm was located over clarion, moving northeast at 15 mph (radar). Hazards include ping-pong ball-size hail and 60 mph wind gusts. People and animals outdoors will be injured. expect hail damage to roofs, siding, windows, and vehicles. expect wind damage to trees and power lines, resulting in some power outages. torrential rainfall is occurring with this storm and may lead to flash flooding. Do not drive your vehicle through flooded roadways.
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| 5/28/2017 4:14 PM EDT |
 At 413 pm edt, a severe thunderstorm was located over knox, moving northeast at 15 mph (radar). Hazards include 60 mph wind gusts and half dollar-size hail. Minor hail damage to vehicles is possible. expect wind damage to trees and power lines, resulting in some power outages. torrential rainfall is occurring with this storm and may lead to flash flooding. do not drive your vehicle through flooded roadways. Locations impacted include, clarion, knox, shippenville, fryburg, this includes interstate 80 in pennsylvania between mile markers 52 and 60.
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| 5/28/2017 4:01 PM EDT |
 At 401 pm edt, a severe thunderstorm was located over knox, moving northeast at 10 mph (radar). Hazards include 60 mph wind gusts and half dollar-size hail. Minor hail damage to vehicles is possible. Expect wind damage to trees and power lines, resulting in some power outages.
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| 5/1/2017 3:15 PM EDT | Trees down in clarion county PA, 0.4 miles NE of Knox, PA |
| 5/1/2017 3:12 PM EDT |
 The tornado warning for southeastern venango, northeastern butler, northwestern armstrong and west central clarion counties will expire at 315 pm edt, the storm which prompted the warning has weakened below severe limits and no longer appears capable of producing a tornado. therefore, the warning will be allowed to expire. a tornado watch remains in effect until 700 pm edt for northwestern and west central pennsylvania. remember, a severe thunderstorm warning still remains in effect for clarion county.
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| 5/1/2017 3:10 PM EDT |
 At 309 pm edt, severe thunderstorms were located along a line extending from near enterprise to near knox, moving east at 45 mph (public). Hazards include 60 mph wind gusts. expect damage to trees and power lines, resulting in some power outages
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| 5/1/2017 3:05 PM EDT |
 At 304 pm edt, severe thunderstorms were located along a line extending from grand valley to 7 miles northwest of knox, moving east at 50 mph (radar). Hazards include 60 mph wind gusts. Expect damage to trees and power lines, resulting in some power outages. locations impacted include, oil city, clarion, knox, sugarcreek, tionesta, hasson heights, seneca, emlenton, rouseville, shippenville, st. petersburg, woodland heights, this includes interstate 80 in pennsylvania between mile markers 45 and 62. A tornado watch remains in effect until 700 pm edt for northwestern and west central pennsylvania.
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| 5/1/2017 3:01 PM EDT |
 At 301 pm edt, a severe thunderstorm capable of producing a tornado was located 9 miles southwest of knox, moving northeast at 50 mph (radar indicated rotation). Hazards include tornado. Flying debris will be dangerous to those caught without shelter. mobile homes will be damaged or destroyed. damage to roofs, windows, and vehicles will occur. tree damage is likely. this dangerous storm will be near, knox around 315 pm edt. other locations impacted by this tornadic thunderstorm include emlenton, foxburg, parker, st. petersburg, shippenville, callensburg, sligo and eau claire. This includes interstate 80 in pennsylvania between mile markers 42 and 64.
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| 5/1/2017 2:54 PM EDT |
 At 253 pm edt, severe thunderstorms were located along a line extending from near titusville to 11 miles south of franklin, moving east at 50 mph (radar). Hazards include 60 mph wind gusts. Expect damage to trees and power lines, resulting in some power outages. locations impacted include, oil city, franklin, clarion, knox, sugarcreek, tionesta, hasson heights, seneca, emlenton, rouseville, clintonville, shippenville, this includes interstate 80 in pennsylvania between mile markers 36 and 62. A tornado watch remains in effect until 700 pm edt for northwestern and west central pennsylvania.
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| 5/1/2017 2:50 PM EDT |
 At 250 pm edt, a severe thunderstorm capable of producing a tornado was located 10 miles northeast of shanor-northvue, or 13 miles north of butler, moving northeast at 50 mph (radar indicated rotation). Hazards include tornado. Flying debris will be dangerous to those caught without shelter. mobile homes will be damaged or destroyed. damage to roofs, windows, and vehicles will occur. tree damage is likely. this dangerous storm will be near, knox around 315 pm edt. other locations impacted by this tornadic thunderstorm include emlenton, foxburg, eau claire, parker, st. petersburg, shippenville, callensburg, bruin, fairview and sligo. this includes interstate 80 in pennsylvania between mile markers 42 and 64. Please report severe weather by calling 412-262-1988, posting to the nws pittsburgh facebook page, or using twitter @nwspittsburgh.
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| 5/1/2017 2:26 PM EDT |
 At 226 pm edt, severe thunderstorms were located along a line extending from near meadville to 6 miles southwest of grove city, moving east at 50 mph (radar). Hazards include 60 mph wind gusts. expect damage to trees and power lines, resulting in some power outages
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| 1/12/2017 2:24 PM EST |
 At 223 pm est, a severe thunderstorm was located near knox, moving east at 60 mph (radar indicated). Hazards include 60 mph wind gusts. expect damage to trees and power lines, resulting in some power outages
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| 9/8/2016 6:07 PM EDT |
 At 607 pm edt, severe thunderstorms were located along a line extending from 8 miles south of oil city to 11 miles southwest of knox to 6 miles northwest of shanor-northvue, moving east at 50 mph (radar indicated). Hazards include 60 mph wind gusts. Expect damage to trees and power lines. resulting in some power outages. locations impacted include, new castle, franklin, clarion, kittanning, knox, rimersburg, shanor-northvue, slippery rock, oakwood, prospect, chicora, seneca, east brady, harrisville, parker, polk, plain grove township, sligo, south new castle and emlenton. this includes the following highways, interstate 79 in pennsylvania between mile markers 97 and 109. interstate 80 in pennsylvania between mile markers 28 and 72. Please report severe weather by calling 4 1 2, 2 6 2, 1 9 8 8, posting to the nws pittsburgh facebook page, or using twitter @nwspittsburgh.
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| 9/8/2016 5:48 PM EDT |
 At 548 pm edt, severe thunderstorms were located along a line extending from 7 miles southwest of franklin to near grove city to near new castle, moving east at 50 mph (radar indicated). Hazards include 60 mph wind gusts. Expect damage to trees and power lines. Resulting in some power outages.
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| 8/13/2016 7:22 PM EDT |
 At 722 pm edt, severe thunderstorms were located along a line extending from sheffield to 9 miles southeast of tionesta, moving east at 40 mph (radar indicated). Hazards include 60 mph wind gusts. Expect damage to trees and power lines. Resulting in some power outages.
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| 6/16/2016 10:54 AM EDT | Tree blocking huckleberry rdg road in beaver tw in clarion county PA, 2 miles WNW of Knox, PA |
| 6/16/2016 10:24 AM EDT |
 At 1023 am edt, severe thunderstorms were located along a line extending from 6 miles east of enterprise to rimersburg, moving east at 35 mph (radar indicated). Hazards include 60 mph wind gusts and penny size hail. Expect damage to trees and power lines. Resulting in some power outages.
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| 9/4/2015 6:35 PM EDT | Trees and wires down in clarion county PA, 3.7 miles N of Knox, PA |
| 9/4/2015 6:16 PM EDT |
 At 616 pm edt, a severe thunderstorm was located near rimersburg, moving northwest at 10 mph (radar indicated). Hazards include 60 mph wind gusts and quarter size hail. expect wind damage to trees and some power outages
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| 8/3/2015 9:38 PM EDT |
 At 938 pm edt, a severe thunderstorm was located near rimersburg, moving northeast at 30 mph (trained weather spotters). Hazards include 60 mph wind gusts and quarter size hail. Hail damage to vehicles is expected. Expect wind damage to trees and some power outages.
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| 8/3/2015 9:38 PM EDT |
 At 938 pm edt, a severe thunderstorm was located near rimersburg, moving northeast at 30 mph (trained weather spotters). Hazards include 60 mph wind gusts and quarter size hail. Hail damage to vehicles is expected. Expect wind damage to trees and some power outages.
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| 7/9/2015 3:18 PM EDT |
 At 317 pm edt, a severe thunderstorm was located near rimersburg, moving east at 35 mph (radar indicated). Hazards include 60 mph wind gusts. Expect damage to trees and some power outages locations impacted include, clarion, knox, rimersburg, parker, sligo, emlenton, bruin, shippenville, st. petersburg, callensburg and foxburg. A tornado watch remains in effect until 900 pm edt for west central pennsylvania.
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| 7/9/2015 2:43 PM EDT |
 At 242 pm edt, a severe thunderstorm was located 9 miles east of grove city, moving east at 35 mph (radar indicated). Hazards include 60 mph wind gusts. expect damage to trees and some power outages
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| 6/14/2015 7:57 PM EDT | The severe thunderstorm warning for northwestern armstrong. south central venango and southwestern clarion counties will expire at 800 pm edt. the storms which prompted the warning have weakened below severe limits. and no longer pose an immediate threat to life or property. therefore the warning will be allowed to expire. However gusty winds. |
| 6/14/2015 7:40 PM EDT |
 A severe thunderstorm warning remains in effect until 800 pm edt for northwestern armstrong. south central venango and southwestern clarion counties. at 739 pm edt. severe thunderstorms were located along a line extending from 12 miles southwest of knox to 7 miles west of rimersburg to 7 miles northwest of kittanning. Moving east at 40.
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| 6/14/2015 7:11 PM EDT |
 At 711 pm edt, severe thunderstorms were located along a line extending from near grove city to near slippery rock to homeacre-lyndora, moving east at 40 mph (radar indicated). Hazards include 60 mph wind gusts. Expect damage to roofs. Siding and trees.
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| 6/12/2015 6:05 PM EDT |
 At 605 pm edt, a severe thunderstorm was located near rimersburg, moving east at 40 mph (radar indicated). Hazards include 60 mph wind gusts and penny size hail. Expect damage to roofs. siding and trees. locations impacted include, clarion, knox, rimersburg, new bethlehem, east brady, parker, sligo, strattanville, limestone, shippenville, st. Petersburg, petrolia, karns city, callensburg and fryburg.
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| 6/12/2015 5:49 PM EDT |
 At 545 pm edt, a severe thunderstorm was located 11 miles southwest of knox, moving east at 45 mph (radar indicated). Hazards include 60 mph wind gusts and penny size hail. Expect damage to roofs. Siding and trees.
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| 6/12/2015 5:45 PM EDT |
 At 545 pm edt, a severe thunderstorm was located 11 miles southwest of knox, moving east at 45 mph (radar indicated). Hazards include 60 mph wind gusts and penny size hail. Expect damage to roofs. Siding and trees.
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| 5/31/2015 1:36 PM EDT | At 135 pm edt, a severe thunderstorm was located 8 miles southwest of knox, moving northeast at 30 mph (radar indicated). Hazards include 60 mph wind gusts and quarter size hail. Hail damage to vehicles is expected. expect wind damage to roofs, siding and trees. locations impacted include, clarion, knox, parker, sligo, strattanville, shippenville, st. Petersburg, callensburg, foxburg and fryburg. |
| 5/31/2015 1:26 PM EDT | At 126 pm edt, a severe thunderstorm was located 11 miles west of rimersburg, moving northeast at 35 mph (radar indicated). Hazards include 60 mph wind gusts and quarter size hail. Hail damage to vehicles is expected. Expect wind damage to roofs, siding and trees. |
| 5/29/2015 5:17 PM EDT | At 517 pm edt, a severe thunderstorm was located near rimersburg, moving northeast at 20 mph (radar indicated). Hazards include 60 mph wind gusts and quarter size hail. Hail damage to vehicles is expected. expect wind damage to roofs, siding and trees. locations impacted include, knox, rimersburg, east brady, parker, sligo, limestone, shippenville, st. Petersburg, callensburg and foxburg. |
| 5/29/2015 5:07 PM EDT | At 507 pm edt, a severe thunderstorm was located 9 miles west of rimersburg, moving northeast at 20 mph (radar indicated). Hazards include 60 mph wind gusts and quarter size hail. Hail damage to vehicles is expected. Expect wind damage to roofs, siding and trees. |
| 5/11/2015 9:02 PM EDT | At 901 pm edt, severe thunderstorms were located along a line extending from 8 miles southwest of titusville to 7 miles east of oil city to near knox, moving east at 50 mph (radar indicated). Hazards include 60 mph wind gusts. Expect damage to roofs. siding and trees. locations impacted include, oil city, franklin, marienville, knox, sugarcreek, tionesta, hasson heights, seneca, polk, emlenton, rouseville, shippenville, cooperstown, kennerdell, woodland heights, pleasantville, utica, leeper, kellettville and fryburg. 75in. |
| 5/11/2015 8:45 PM EDT | At 845 pm edt, severe thunderstorms were located along a line extending from 6 miles northwest of sugarcreek to near knox, moving northeast at 45 mph (radar indicated). Hazards include 60 mph wind gusts. Expect damage to roofs. Siding and trees. |
| 7/10/2013 5:21 PM EDT | Trees down in clarion county PA, 0.4 miles NE of Knox, PA |
| 5/10/2013 5:24 PM EDT | Trees and wires down. time modified based on rada in clarion county PA, 0.4 miles NE of Knox, PA |
| 5/10/2013 5:20 PM EDT | Trees and wires dow in clarion county PA, 0.4 miles NE of Knox, PA |
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