Alert archive / Iowa / Severe Thunderstorm Watches / 2020
Severe Thunderstorm Watches in Iowa, August 2020
6 severe thunderstorm watches in August 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 August 2020. Tap one for its archive.
- Severe Thunderstorm Watches
- 6
- Busiest day
- August 10, 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 |
|---|---|---|---|---|
| Aug 8, 10:10 PM CDT | Severe Thunderstorm Watch | SPC | Lyon, Osceola, Sioux | 6 hr |
| Aug 10, 6:06 AM CDT | Severe Thunderstorm Watch | SPC | Buena Vista, Cherokee, Clay, Dickinson, Ida, Lyon and 6 more | 5 hr |
| Aug 10, 8:56 AM CDT | Severe Thunderstorm Watch | SPC | Adair, Audubon, Black Hawk, Boone, Bremer, Butler and 30 more | 5 hr |
| Aug 10, 11:26 AM CDT | Severe Thunderstorm Watch | SPC | Benton, Buchanan, Cedar, Clayton, Clinton, Delaware and 17 more | 7 hr |
| Aug 14, 2:17 PM CDT | Severe Thunderstorm Watch | SPC | Buena Vista, Cherokee, Clay, Dickinson, Harrison, Ida and 8 more | 6 hr |
| Aug 28, 3:16 PM CDT | Severe Thunderstorm Watch | SPC | Benton, Black Hawk, Buchanan, Cedar, Clayton, Clinton and 19 more | 4 hr |
By county
Every county with at least one alert. A county page lists each alert that covered it.
- Lyon County3
- Osceola County3
- Sioux County3
- Buena Vista County2
- Cherokee County2
- Clay County2
- Dickinson County2
- Ida County2
- Monona County2
- O'Brien County2
- Plymouth County2
- Woodbury County2
- Black Hawk County2
- Grundy County2
- Jasper County2
- Mahaska County2
- Marion County2
- Marshall County2
- Polk County2
- Poweshiek County2
- Story County2
- Tama County2
- Benton County2
- Buchanan County2
- Cedar County2
- Clayton County2
- Clinton County2
- Delaware County2
- Dubuque County2
- Fayette County2
- Iowa County2
- Jackson County2
- Johnson County2
- Jones County2
- Keokuk County2
- Linn County2
- Washington County2
- Adair County1
- Audubon County1
- Boone County1
33 more counties
- Bremer County1
- Butler County1
- Calhoun County1
- Carroll County1
- Cass County1
- Clarke County1
- Crawford County1
- Dallas County1
- Franklin County1
- Greene County1
- Guthrie County1
- Hamilton County1
- Hardin County1
- Humboldt County1
- Lucas County1
- Madison County1
- Monroe County1
- Pocahontas County1
- Sac County1
- Wapello County1
- Warren County1
- Webster County1
- Wright County1
- Des Moines County1
- Henry County1
- Jefferson County1
- Lee County1
- Louisa County1
- Muscatine County1
- Scott County1
- Van Buren County1
- Harrison County1
- Pottawattamie County1
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.