This historical hail map shows the hail storms that moved through central Texas on April 20th 2006.(Click on the map for a larger view) The most intense large hail is displayed with a heatmap. Around 5:00 pm a major hail storm hit the outlet malls in San Marcos, TX destroying cars and windshields. Large hail also damaged roofs and cars in north Austin. Use Interactive Hail Maps to zoom all the way to street level and pinpoint the exact neighborhoods affected. Hail history back to January 2011 comes with your subscription. Check our prices. Find the hail storms others are missing.