Alert archive / Iowa / Tornado Warnings / 2021
Tornado Warnings in Iowa, August 2021
22 tornado warnings in August 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 tornado warnings reaches back to 1986.
Tornado Warnings by county
Each county as a circle sized by its count in August 2021. Tap one for its archive.
- Tornado Warnings
- 22
- Busiest day
- August 27, 20218 tornado 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 |
|---|---|---|---|---|
| Aug 8, 4:29 PM CDT | Tornado Warning | FSD | Osceola | 31 min |
| Aug 8, 5:26 PM CDT | Tornado Warning | FSD | Clay, Dickinson, O'Brien | 49 min |
| Aug 8, 6:31 PM CDT | Tornado Warning | FSD | Buena Vista, Clay | 44 min |
| Aug 8, 7:15 PM CDT | Tornado Warning | FSD | Buena Vista, Clay | 45 min |
| Aug 8, 8:36 PM CDT | Tornado Warning | DMX | Pocahontas | 24 min |
| Aug 8, 9:02 PM CDT | Tornado Warning | DMX | Calhoun, Pocahontas | 31 min |
| Aug 8, 11:00 PM CDT | Tornado Warning | DMX | Webster | 30 min |
| Aug 8, 11:30 PM CDT | Tornado Warning | DMX | Webster | 30 min |
| Aug 8, 11:52 PM CDT | Tornado Warning | DMX | Boone, Webster | 38 min |
| Aug 9, 12:23 AM CDT | Tornado Warning | DMX | Butler, Franklin | 20 min |
| Aug 11, 5:38 PM CDT | Tornado Warning | DVN | Dubuque | 13 min |
| Aug 24, 3:38 PM CDT | Tornado Warning | DVN | Dubuque | 25 min |
| Aug 26, 11:20 PM CDT | Tornado Warning | DVN | Jefferson, Keokuk | 27 min |
| Aug 27, 1:04 AM CDT | Tornado Warning | FSD | Sioux | 26 min |
| Aug 27, 4:48 PM CDT | Tornado Warning | DMX | Cerro Gordo, Hancock | 57 min |
| Aug 27, 5:23 PM CDT | Tornado Warning | DMX | Cerro Gordo | 37 min |
| Aug 27, 5:25 PM CDT | Tornado Warning | DMX | Cerro Gordo | 35 min |
| Aug 27, 5:34 PM CDT | Tornado Warning | ARX | Floyd | 41 min |
| Aug 27, 6:09 PM CDT | Tornado Warning | ARX | Chickasaw, Floyd | 51 min |
| Aug 27, 6:45 PM CDT | Tornado Warning | ARX | Chickasaw, Fayette | 45 min |
| Aug 28, 4:39 PM CDT | Tornado Warning | FSD | Lyon | 36 min |
| Aug 28, 4:45 PM CDT | Tornado Warning | FSD | Lyon | 30 min |
By county
Every county with at least one alert. A county page lists each alert that covered it.
- Clay County3
- Webster County3
- Cerro Gordo County3
- Buena Vista County2
- Pocahontas County2
- Dubuque County2
- Floyd County2
- Chickasaw County2
- Lyon County2
- Osceola County1
- Dickinson County1
- O'Brien County1
- Calhoun County1
- Boone County1
- Butler County1
- Franklin County1
- Jefferson County1
- Keokuk County1
- Sioux County1
- Hancock County1
- Fayette 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. Warning verification from the Mesonet's Cow. Rebuilt daily.