Alert archive / Iowa / Severe Thunderstorm Warnings / 2009
Severe Thunderstorm Warnings in Iowa, April 2009
39 severe thunderstorm warnings in April 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 April 2009. Tap one for its archive.
- Severe Thunderstorm Warnings
- 39
- Busiest day
- April 26, 200917 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 |
|---|---|---|---|---|
| Apr 24, 5:16 PM CDT | Severe Thunderstorm Warning | DMX | Cerro Gordo, Hancock | 44 min |
| Apr 24, 5:18 PM CDT | Severe Thunderstorm Warning | DMX | Hancock, Humboldt, Wright | 42 min |
| Apr 24, 5:58 PM CDT | Severe Thunderstorm Warning | DMX | Cerro Gordo | 47 min |
| Apr 24, 6:00 PM CDT | Severe Thunderstorm Warning | DMX | Cerro Gordo, Franklin, Hancock, Wright | 45 min |
| Apr 24, 6:16 PM CDT | Severe Thunderstorm Warning | ARX | Howard, Mitchell | 44 min |
| Apr 24, 6:24 PM CDT | Severe Thunderstorm Warning | DMX | Franklin, Wright | 36 min |
| Apr 24, 6:32 PM CDT | Severe Thunderstorm Warning | DMX | Adair, Audubon, Cass, Guthrie | 58 min |
| Apr 24, 6:37 PM CDT | Severe Thunderstorm Warning | ARX | Floyd | 38 min |
| Apr 24, 6:44 PM CDT | Severe Thunderstorm Warning | DMX | Boone, Greene, Webster | 46 min |
| Apr 24, 6:48 PM CDT | Severe Thunderstorm Warning | DMX | Cerro Gordo, Franklin | 24 min |
| Apr 24, 6:52 PM CDT | Severe Thunderstorm Warning | OAX | Montgomery, Pottawattamie | 25 min |
| Apr 24, 7:03 PM CDT | Severe Thunderstorm Warning | DMX | Butler, Franklin | 42 min |
| Apr 24, 7:09 PM CDT | Severe Thunderstorm Warning | DMX | Boone, Hamilton, Hardin, Webster | 51 min |
| Apr 24, 7:14 PM CDT | Severe Thunderstorm Warning | ARX | Chickasaw, Floyd | 46 min |
| Apr 24, 7:29 PM CDT | Severe Thunderstorm Warning | DMX | Adair, Cass, Dallas, Guthrie | 46 min |
| Apr 24, 7:42 PM CDT | Severe Thunderstorm Warning | DMX | Bremer, Butler | 63 min |
| Apr 24, 8:12 PM CDT | Severe Thunderstorm Warning | DMX | Adair, Madison | 48 min |
| Apr 24, 8:27 PM CDT | Severe Thunderstorm Warning | DMX | Adams, Union | 48 min |
| Apr 24, 8:59 PM CDT | Severe Thunderstorm Warning | DMX | Adair, Madison | 46 min |
| Apr 24, 9:17 PM CDT | Severe Thunderstorm Warning | DMX | Clarke, Union | 43 min |
| Apr 24, 11:04 PM CDT | Severe Thunderstorm Warning | DMX | Clarke, Madison, Union, Warren | 41 min |
| Apr 25, 1:08 AM CDT | Severe Thunderstorm Warning | FSD | Plymouth, Sioux | 52 min |
| Apr 25, 7:28 PM CDT | Severe Thunderstorm Warning | DMX | Dallas, Madison, Warren | 24 min |
| Apr 26, 9:06 AM CDT | Severe Thunderstorm Warning | OAX | Mills, Pottawattamie | 39 min |
| Apr 26, 10:40 AM CDT | Severe Thunderstorm Warning | DMX | Adair, Adams, Madison, Union | 32 min |
| Apr 26, 1:49 PM CDT | Severe Thunderstorm Warning | OAX | Mills, Montgomery, Pottawattamie | 41 min |
| Apr 26, 2:09 PM CDT | Severe Thunderstorm Warning | DMX | Cass | 51 min |
| Apr 26, 3:01 PM CDT | Severe Thunderstorm Warning | OAX | Mills, Montgomery, Pottawattamie | 59 min |
| Apr 26, 3:42 PM CDT | Severe Thunderstorm Warning | DMX | Audubon, Cass | 48 min |
| Apr 26, 4:34 PM CDT | Severe Thunderstorm Warning | OAX | Montgomery | 28 min |
| Apr 26, 4:41 PM CDT | Severe Thunderstorm Warning | DVN | Buchanan, Delaware, Linn | 23 min |
| Apr 26, 4:58 PM CDT | Severe Thunderstorm Warning | DMX | Adair, Audubon, Cass, Guthrie | 47 min |
| Apr 26, 6:04 PM CDT | Severe Thunderstorm Warning | DMX | Clarke, Decatur, Ringgold, Union | 41 min |
| Apr 26, 6:23 PM CDT | Severe Thunderstorm Warning | DMX | Jasper, Marshall, Poweshiek, Tama | 37 min |
| Apr 26, 6:36 PM CDT | Severe Thunderstorm Warning | DMX | Clarke, Decatur, Lucas, Marion, Warren | 39 min |
| Apr 26, 6:39 PM CDT | Severe Thunderstorm Warning | DMX | Marion, Polk, Warren | 51 min |
| Apr 26, 6:50 PM CDT | Severe Thunderstorm Warning | DMX | Appanoose, Decatur, Lucas, Monroe, Wayne | 40 min |
| Apr 26, 6:56 PM CDT | Severe Thunderstorm Warning | DMX | Tama | 26 min |
| Apr 26, 6:58 PM CDT | Severe Thunderstorm Warning | DMX | Marion | 47 min |
By county
Every county with at least one alert. A county page lists each alert that covered it.
- Adair County6
- Cass County5
- Madison County5
- Union County5
- Cerro Gordo County4
- Franklin County4
- Montgomery County4
- Pottawattamie County4
- Clarke County4
- Warren County4
- Hancock County3
- Wright County3
- Audubon County3
- Guthrie County3
- Mills County3
- Decatur County3
- Marion County3
- Floyd County2
- Boone County2
- Webster County2
- Butler County2
- Dallas County2
- Adams County2
- Tama County2
- Lucas County2
- Humboldt County1
- Howard County1
- Mitchell County1
- Greene County1
- Hamilton County1
- Hardin County1
- Chickasaw County1
- Bremer County1
- Plymouth County1
- Sioux County1
- Buchanan County1
- Delaware County1
- Linn County1
- Ringgold County1
- Jasper 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.