Alert archive / Iowa / Severe Thunderstorm Watches / 2020
Severe Thunderstorm Watches in Iowa, May 2020
5 severe thunderstorm watches in May 2020. An alert counts here when it covered any part of the state, so the counties below add up to more than the state. The archive of severe thunderstorm watches reaches back to 1997.
Severe Thunderstorm Watches by county
Each county as a circle sized by its count in May 2020. Tap one for its archive.
- Severe Thunderstorm Watches
- 5
- Busiest day
- May 24, 20203 severe thunderstorm watches
Over time
By day
Days in UTC, the clock the archive keeps.
The alerts
Every alert, in the order issued. Times are local, Central Time. Each opens its own page with the text, the map, the radar and the sounding.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 14, 4:24 PM CDT | Severe Thunderstorm Watch | SPC | Appanoose, Clarke, Dallas, Davis, Decatur, Jasper and 13 more | 9 hr |
| May 14, 6:15 PM CDT | Severe Thunderstorm Watch | SPC | Cedar, Clinton, Des Moines, Henry, Iowa, Jefferson and 8 more | 8 hr |
| May 23, 11:58 PM CDT | Severe Thunderstorm Watch | SPC | Cherokee, Harrison, Ida, Lyon, Mills, Monona and 6 more | 6 hr |
| May 24, 5:30 AM CDT | Severe Thunderstorm Watch | SPC | Adair, Adams, Appanoose, Audubon, Boone, Carroll and 31 more | 4 hr |
| May 24, 1:40 PM CDT | Severe Thunderstorm Watch | SPC | Adair, Adams, Appanoose, Audubon, Boone, Carroll and 32 more | 6 hr |
By county
Every county with at least one alert. A county page lists each alert that covered it.
- Appanoose County3
- Clarke County3
- Dallas County3
- Davis County3
- Decatur County3
- Jasper County3
- Lucas County3
- Madison County3
- Mahaska County3
- Marion County3
- Monroe County3
- Polk County3
- Poweshiek County3
- Ringgold County3
- Taylor County3
- Union County3
- Wapello County3
- Warren County3
- Wayne County3
- Mills County3
- Pottawattamie County3
- Shelby County3
- Harrison County2
- Adair County2
- Adams County2
- Audubon County2
- Boone County2
- Carroll County2
- Cass County2
- Crawford County2
- Fremont County2
- Greene County2
- Guthrie County2
- Marshall County2
- Montgomery County2
- Page County2
- Story County2
- Tama County2
- Cedar County1
- Clinton County1
20 more counties
Nearby
Alerts in force nowTornadoes on recordThe radar archive20192021
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. Warning verification from the Mesonet's Cow. Rebuilt daily.