Severe Thunderstorm Climatology

This map shows you a 20-year climatology of severe thunderstorm watches. Data produced by NOAA National Weather Service.

1. Under the Storm Prediction Center WCM Page banner near the top of the page, click on the 20y SPC Watch Climatology. 2. Scroll down to 20y Annual Average Watches by County. 3. Click on the average number of severe thunderstorm watches per year image to view it in larger form. Note: This page contains a lot of other statistics about the hail, severe thunderstorm and tornado products.