Severe Thunderstorm Watches in the United States
14,727 severe thunderstorm watches since 1986. Each alert counts once, however many counties it covered. The archive of severe thunderstorm watches reaches back to 1997.
Severe Thunderstorm Watches by state
Each state shaded by its count. Tap a state for its own archive.
- Severe Thunderstorm Watches
- 14,727
- Busiest year
- 2003651 severe thunderstorm watches
- Average year
- 491over 30 years on file
- Busiest day
- June 18, 200917 severe thunderstorm watches
Over time
By year
Watches are counted from 1997, when the Storm Prediction Center archive begins.
By month of the year
By state
Every state and territory, with the alerts that covered any part of it. Each state’s page lists every one of them.
- Texas2,676
- Kansas2,138
- Oklahoma1,896
- Nebraska1,817
- Missouri1,793
- Illinois1,388
- Iowa1,381
- South Dakota1,337
- Minnesota1,207
- Arkansas1,205
- Indiana1,134
- Pennsylvania1,001
- Ohio995
- Kentucky993
- Virginia919
- Wisconsin912
- West Virginia860
- North Dakota840
- Colorado819
- Tennessee792
- Mississippi745
- North Carolina731
- New York691
- Georgia686
- Louisiana674
- Michigan649
- Maryland647
- Montana634
- Alabama613
- Wyoming524
- South Carolina474
- New Mexico463
- New Jersey462
- Connecticut333
- Florida326
- Delaware314
- Massachusetts306
- Vermont279
- District of Columbia251
- New Hampshire233
The busiest days
Days with the most alerts issued, by UTC date.
Nearby
Sources
National Weather Service watches, warnings, advisories and statements from the Iowa Environmental Mesonet's VTEC archive, which reconstructs tornado, severe thunderstorm, flash flood and marine warnings back to 1986 from the NWS text archive. Storm Prediction Center watches and mesoscale discussions from SPC's archive through the Mesonet. County centers from the US Census Bureau. Rebuilt daily.