Alert archive / Iowa / Red Flag Warnings / 2021
Red Flag Warnings in Iowa, May 2021
4 red flag warnings in May 2021. 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 red flag warnings reaches back to 2005.
Red Flag Warnings by county
Each county as a circle sized by its count in May 2021. Tap one for its archive.
- Red Flag Warnings
- 4
- Busiest day
- May 1, 20214 red flag warnings
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 1, 3:09 AM CDT | Red Flag Warning | FSD | Buena Vista, Cherokee, Clay, Dickinson, Ida, O'Brien and 4 more | 16 hr |
| May 1, 3:57 AM CDT | Red Flag Warning | DMX | Adair, Audubon, Black Hawk, Boone, Bremer, Butler and 24 more | 15 hr |
| May 1, 10:01 AM CDT | Red Flag Warning | OAX | Harrison, Mills, Monona, Pottawattamie, Shelby | 10 hr |
| May 1, 10:24 AM CDT | Red Flag Warning | ARX | Allamakee, Chickasaw, Clayton, Fayette, Floyd, Howard and 2 more | 10 hr |
By county
Every county with at least one alert. A county page lists each alert that covered it.
- Buena Vista County1
- Cherokee County1
- Clay County1
- Dickinson County1
- Ida County1
- O'Brien County1
- Osceola County1
- Plymouth County1
- Sioux County1
- Woodbury County1
- Adair County1
- Audubon County1
- Black Hawk County1
- Boone County1
- Bremer County1
- Butler County1
- Calhoun County1
- Carroll County1
- Cass County1
- Cerro Gordo County1
- Crawford County1
- Dallas County1
- Emmet County1
- Franklin County1
- Greene County1
- Grundy County1
- Guthrie County1
- Hamilton County1
- Hancock County1
- Hardin County1
- Humboldt County1
- Kossuth County1
- Palo Alto County1
- Pocahontas County1
- Sac County1
- Story County1
- Webster County1
- Winnebago County1
- Worth County1
- Wright County1
Nearby
Alerts in force nowTornadoes on recordThe radar archive20202022
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.