Alert archive / Iowa / Tornado Warnings / 2011
Tornado Warnings in Iowa, May 2011
20 tornado warnings in May 2011. 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 May 2011. Tap one for its archive.
- Tornado Warnings
- 20
- Busiest day
- May 22, 20118 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 |
|---|---|---|---|---|
| May 11, 2:22 PM CDT | Tornado Warning | DMX | Adams | 23 min |
| May 11, 4:11 PM CDT | Tornado Warning | DMX | Adams, Taylor | 49 min |
| May 11, 4:50 PM CDT | Tornado Warning | DMX | Adams, Union | 40 min |
| May 11, 5:42 PM CDT | Tornado Warning | DMX | Union | 33 min |
| May 11, 6:37 PM CDT | Tornado Warning | FSD | Lyon, Sioux | 23 min |
| May 11, 6:58 PM CDT | Tornado Warning | FSD | Dickinson, Lyon, O'Brien, Osceola | 32 min |
| May 12, 4:58 PM CDT | Tornado Warning | OAX | Monona | 32 min |
| May 12, 5:28 PM CDT | Tornado Warning | OAX | Monona | 32 min |
| May 22, 2:23 PM CDT | Tornado Warning | DMX | Poweshiek | 17 min |
| May 22, 2:38 PM CDT | Tornado Warning | DVN | Benton, Iowa, Johnson, Keokuk, Linn | 67 min |
| May 22, 2:42 PM CDT | Tornado Warning | DMX | Black Hawk, Bremer | 33 min |
| May 22, 2:43 PM CDT | Tornado Warning | ARX | Howard | 62 min |
| May 22, 2:45 PM CDT | Tornado Warning | DVN | Benton, Iowa, Linn | 29 min |
| May 22, 3:14 PM CDT | Tornado Warning | DMX | Bremer | 31 min |
| May 22, 3:22 PM CDT | Tornado Warning | ARX | Fayette | 38 min |
| May 22, 3:22 PM CDT | Tornado Warning | DVN | Cedar, Iowa, Johnson | 53 min |
| May 22, 8:24 PM CDT | Tornado Warning | DVN | Scott | 51 min |
| May 24, 5:53 PM CDT | Tornado Warning | DVN | Buchanan, Delaware, Linn | 37 min |
| May 25, 4:35 PM CDT | Tornado Warning | DVN | Des Moines, Henry, Lee | 40 min |
| May 25, 5:11 PM CDT | Tornado Warning | DVN | Des Moines, Louisa | 23 min |
By county
Every county with at least one alert. A county page lists each alert that covered it.
- Adams County3
- Iowa County3
- Linn County3
- Union County2
- Lyon County2
- Monona County2
- Benton County2
- Johnson County2
- Bremer County2
- Des Moines County2
- Taylor County1
- Sioux County1
- Dickinson County1
- O'Brien County1
- Osceola County1
- Poweshiek County1
- Keokuk County1
- Black Hawk County1
- Howard County1
- Fayette County1
- Cedar County1
- Scott County1
- Buchanan County1
- Delaware County1
- Henry County1
- Lee County1
- Louisa County1
Nearby
Alerts in force nowTornadoes on recordThe radar archive20102012
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.