Alert archive / Iowa / Severe Thunderstorm Warnings / 2009
Severe Thunderstorm Warnings in Iowa, May 2009
27 severe thunderstorm warnings in May 2009. 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 warnings reaches back to 1986.
Severe Thunderstorm Warnings by county
Each county as a circle sized by its count in May 2009. Tap one for its archive.
- Severe Thunderstorm Warnings
- 27
- Busiest day
- May 6, 200914 severe thunderstorm 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 6, 8:27 AM CDT | Severe Thunderstorm Warning | OAX | Shelby | 33 min |
| May 6, 9:34 AM CDT | Severe Thunderstorm Warning | FSD | Dickinson | 26 min |
| May 6, 2:33 PM CDT | Severe Thunderstorm Warning | OAX | Harrison, Monona | 27 min |
| May 6, 2:34 PM CDT | Severe Thunderstorm Warning | FSD | Plymouth, Woodbury | 41 min |
| May 6, 3:05 PM CDT | Severe Thunderstorm Warning | OAX | Harrison, Shelby | 40 min |
| May 6, 3:07 PM CDT | Severe Thunderstorm Warning | FSD | Woodbury | 23 min |
| May 6, 3:08 PM CDT | Severe Thunderstorm Warning | DMX | Sac | 52 min |
| May 6, 3:29 PM CDT | Severe Thunderstorm Warning | DMX | Crawford | 61 min |
| May 6, 3:30 PM CDT | Severe Thunderstorm Warning | FSD | Woodbury | 15 min |
| May 6, 3:52 PM CDT | Severe Thunderstorm Warning | OAX | Harrison, Pottawattamie | 38 min |
| May 6, 4:28 PM CDT | Severe Thunderstorm Warning | OAX | Mills, Montgomery, Pottawattamie | 47 min |
| May 6, 5:01 PM CDT | Severe Thunderstorm Warning | OAX | Mills, Montgomery, Page | 44 min |
| May 6, 5:15 PM CDT | Severe Thunderstorm Warning | FSD | Clay, Dickinson, Osceola | 45 min |
| May 6, 6:23 PM CDT | Severe Thunderstorm Warning | FSD | Buena Vista, Clay | 19 min |
| May 7, 4:10 PM CDT | Severe Thunderstorm Warning | DMX | Decatur, Wayne | 50 min |
| May 8, 5:15 PM CDT | Severe Thunderstorm Warning | DMX | Marshall, Tama | 45 min |
| May 8, 5:27 PM CDT | Severe Thunderstorm Warning | DMX | Marshall, Poweshiek, Tama | 32 min |
| May 8, 5:57 PM CDT | Severe Thunderstorm Warning | DVN | Iowa, Johnson, Linn | 63 min |
| May 8, 6:18 PM CDT | Severe Thunderstorm Warning | DVN | Keokuk, Washington | 57 min |
| May 8, 6:26 PM CDT | Severe Thunderstorm Warning | DMX | Monroe | 22 min |
| May 8, 6:46 PM CDT | Severe Thunderstorm Warning | DMX | Wapello | 29 min |
| May 8, 7:07 PM CDT | Severe Thunderstorm Warning | DVN | Henry, Louisa, Washington | 41 min |
| May 8, 7:40 PM CDT | Severe Thunderstorm Warning | DVN | Louisa, Muscatine | 49 min |
| May 8, 7:57 PM CDT | Severe Thunderstorm Warning | DVN | Des Moines, Louisa | 63 min |
| May 13, 4:07 PM CDT | Severe Thunderstorm Warning | DMX | Jasper, Marion, Polk, Warren | 38 min |
| May 15, 4:12 PM CDT | Severe Thunderstorm Warning | OAX | Harrison, Pottawattamie, Shelby | 26 min |
| May 31, 6:53 PM CDT | Severe Thunderstorm Warning | OAX | Fremont, Mills | 52 min |
By county
Every county with at least one alert. A county page lists each alert that covered it.
- Harrison County4
- Shelby County3
- Woodbury County3
- Pottawattamie County3
- Mills County3
- Louisa County3
- Dickinson County2
- Montgomery County2
- Clay County2
- Marshall County2
- Tama County2
- Washington County2
- Monona County1
- Plymouth County1
- Sac County1
- Crawford County1
- Page County1
- Osceola County1
- Buena Vista County1
- Decatur County1
- Wayne County1
- Poweshiek County1
- Iowa County1
- Johnson County1
- Linn County1
- Keokuk County1
- Monroe County1
- Wapello County1
- Henry County1
- Muscatine County1
- Des Moines County1
- Jasper County1
- Marion County1
- Polk County1
- Warren County1
- Fremont County1
Nearby
Alerts in force nowTornadoes on recordThe radar archive20082010
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.