Alert archive / Iowa / Tornado Warnings
Tornado Warnings in Iowa, 2009
52 tornado warnings in 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 tornado warnings reaches back to 1986.
Tornado Warnings by county
Each county as a circle sized by its count in 2009. Tap one for its archive.
- Tornado Warnings
- 52
- Busiest month
- June29 tornado warnings
- Busiest day
- June 21, 20098 tornado warnings
Over time
By month
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 |
|---|---|---|---|---|
| Mar 23, 5:35 PM CDT | Tornado Warning | OAX | Harrison, Pottawattamie | 55 min |
| Mar 23, 7:48 PM CDT | Tornado Warning | OAX | Montgomery | 27 min |
| Mar 23, 8:03 PM CDT | Tornado Warning | DMX | Adams, Cass | 27 min |
| Apr 26, 4:52 PM CDT | Tornado Warning | DVN | Delaware, Linn | 23 min |
| Apr 26, 5:12 PM CDT | Tornado Warning | DVN | Delaware, Dubuque, Jones, Linn | 48 min |
| Apr 26, 5:48 PM CDT | Tornado Warning | DVN | Delaware, Dubuque | 42 min |
| Apr 26, 6:08 PM CDT | Tornado Warning | DMX | Black Hawk, Tama | 37 min |
| Apr 26, 6:27 PM CDT | Tornado Warning | DVN | Dubuque | 18 min |
| May 6, 5:14 PM CDT | Tornado Warning | OAX | Montgomery, Page | 35 min |
| May 6, 5:23 PM CDT | Tornado Warning | FSD | Clay, Dickinson, O'Brien, Osceola | 52 min |
| May 6, 5:54 PM CDT | Tornado Warning | FSD | Clay, O'Brien | 35 min |
| May 8, 8:07 PM CDT | Tornado Warning | DVN | Louisa | 38 min |
| Jun 7, 6:21 PM CDT | Tornado Warning | DMX | Dallas | 24 min |
| Jun 7, 6:42 PM CDT | Tornado Warning | DMX | Polk | 33 min |
| Jun 7, 7:06 PM CDT | Tornado Warning | DMX | Polk | 24 min |
| Jun 17, 7:28 PM CDT | Tornado Warning | ARX | Floyd | 47 min |
| Jun 17, 8:10 PM CDT | Tornado Warning | ARX | Chickasaw, Floyd | 50 min |
| Jun 17, 8:52 PM CDT | Tornado Warning | ARX | Howard, Mitchell | 53 min |
| Jun 17, 8:59 PM CDT | Tornado Warning | ARX | Chickasaw | 46 min |
| Jun 17, 11:55 PM CDT | Tornado Warning | DMX | Clarke, Madison, Warren | 35 min |
| Jun 18, 12:59 AM CDT | Tornado Warning | DMX | Lucas, Wayne | 31 min |
| Jun 18, 9:52 PM CDT | Tornado Warning | ARX | Allamakee | 38 min |
| Jun 19, 4:00 PM CDT | Tornado Warning | DVN | Des Moines, Lee | 45 min |
| Jun 21, 4:56 PM CDT | Tornado Warning | DMX | Hamilton | 34 min |
| Jun 21, 4:56 PM CDT | Tornado Warning | FSD | Lyon, Sioux | 34 min |
| Jun 21, 5:33 PM CDT | Tornado Warning | FSD | Lyon, Sioux | 27 min |
| Jun 21, 5:35 PM CDT | Tornado Warning | DMX | Hamilton, Hardin | 25 min |
| Jun 21, 5:50 PM CDT | Tornado Warning | DMX | Franklin, Hardin | 25 min |
| Jun 21, 5:56 PM CDT | Tornado Warning | FSD | Lyon, Sioux | 49 min |
| Jun 21, 6:12 PM CDT | Tornado Warning | DMX | Hardin | 33 min |
| Jun 21, 6:41 PM CDT | Tornado Warning | DMX | Butler, Grundy, Hardin | 34 min |
| Jun 21, 7:13 PM CDT | Tornado Warning | DMX | Grundy | 47 min |
| Jun 21, 7:26 PM CDT | Tornado Warning | DVN | Benton | 49 min |
| Jun 21, 7:46 PM CDT | Tornado Warning | DVN | Benton, Iowa | 44 min |
| Jun 21, 7:49 PM CDT | Tornado Warning | DMX | Black Hawk, Grundy | 26 min |
| Jun 21, 8:06 PM CDT | Tornado Warning | DVN | Iowa, Johnson, Washington | 39 min |
| Jun 21, 8:23 PM CDT | Tornado Warning | DVN | Iowa, Johnson | 35 min |
| Jun 21, 8:38 PM CDT | Tornado Warning | DVN | Johnson, Louisa, Washington | 52 min |
| Jun 21, 9:21 PM CDT | Tornado Warning | DVN | Washington | 54 min |
| Jun 23, 1:53 PM CDT | Tornado Warning | DMX | Calhoun, Webster | 24 min |
| Jun 23, 4:12 PM CDT | Tornado Warning | DMX | Black Hawk | 33 min |
| Jul 24, 1:55 PM CDT | Tornado Warning | ARX | Clayton | 40 min |
| Jul 24, 6:12 PM CDT | Tornado Warning | ARX | Clayton, Fayette | 33 min |
| Jul 29, 3:34 PM CDT | Tornado Warning | FSD | Cherokee, Ida, Plymouth, Woodbury | 26 min |
| Aug 9, 11:05 AM CDT | Tornado Warning | DMX | Black Hawk, Grundy | 40 min |
| Aug 19, 3:33 PM CDT | Tornado Warning | ARX | Fayette | 42 min |
| Aug 19, 3:43 PM CDT | Tornado Warning | ARX | Winneshiek | 62 min |
| Aug 19, 4:15 PM CDT | Tornado Warning | ARX | Fayette | 30 min |
| Aug 19, 4:26 PM CDT | Tornado Warning | ARX | Allamakee | 49 min |
| Aug 19, 4:32 PM CDT | Tornado Warning | DVN | Buchanan | 43 min |
| Aug 19, 4:38 PM CDT | Tornado Warning | ARX | Clayton, Fayette | 52 min |
| Aug 19, 5:20 PM CDT | Tornado Warning | ARX | Allamakee | 31 min |
By county
Every county with at least one alert. A county page lists each alert that covered it.
- Black Hawk County4
- Hardin County4
- Grundy County4
- Fayette County4
- Delaware County3
- Dubuque County3
- Allamakee County3
- Lyon County3
- Sioux County3
- Iowa County3
- Johnson County3
- Washington County3
- Clayton County3
- Montgomery County2
- Linn County2
- Clay County2
- O'Brien County2
- Louisa County2
- Polk County2
- Floyd County2
- Chickasaw County2
- Hamilton County2
- Benton County2
- Harrison County1
- Pottawattamie County1
- Adams County1
- Cass County1
- Jones County1
- Tama County1
- Page County1
- Dickinson County1
- Osceola County1
- Dallas County1
- Howard County1
- Mitchell County1
- Clarke County1
- Madison County1
- Warren County1
- Lucas County1
- Wayne County1
The busiest days
Days with the most alerts issued, by UTC date.
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. Rebuilt daily.