Severe Thunderstorm Watches in Iowa
1,381 severe thunderstorm watches since 1986. 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 watches reaches back to 1997.
Severe Thunderstorm Watches by county
Each county as a circle sized by its count since 1986. Tap one for its archive.
- Severe Thunderstorm Watches
- 1,381
- Busiest year
- 201077 severe thunderstorm watches
- Average year
- 46over 30 years on file
Over time
By year
Watches are counted from 1997, when the Storm Prediction Center archive begins.
By month of the year
By county
Every county with at least one alert. A county page lists each alert that covered it.
- Guthrie County336
- Fremont County332
- Audubon County329
- Mills County328
- Dallas County326
- Adair County324
- Shelby County320
- Pottawattamie County319
- Cass County317
- Madison County317
- Montgomery County316
- Warren County315
- Harrison County314
- Page County313
- Boone County311
- Polk County309
- Clarke County308
- Taylor County308
- Adams County307
- Greene County307
- Marion County307
- Union County307
- Carroll County306
- Mahaska County306
- Poweshiek County306
- Story County304
- Jasper County303
- Marshall County301
- Decatur County300
- Ringgold County300
- Hardin County298
- Johnson County298
- Hamilton County297
- Lucas County297
- Wayne County297
- Tama County294
- Washington County293
- Grundy County292
- Monroe County291
- Monona County290
59 more counties
- Webster County290
- Crawford County287
- Iowa County287
- Louisa County287
- Plymouth County286
- Woodbury County286
- Henry County284
- Keokuk County284
- Des Moines County283
- Linn County282
- Cherokee County281
- Calhoun County280
- Muscatine County280
- Wapello County280
- Appanoose County279
- Cedar County278
- Black Hawk County277
- Davis County274
- Jefferson County274
- Van Buren County274
- Scott County272
- Benton County271
- Ida County271
- O'Brien County271
- Wright County271
- Franklin County270
- Jones County270
- Humboldt County269
- Buchanan County268
- Clayton County268
- Delaware County268
- Pocahontas County267
- Cerro Gordo County265
- Sioux County264
- Lee County263
- Sac County263
- Clinton County262
- Fayette County259
- Jackson County259
- Bremer County257
- Buena Vista County257
- Butler County257
- Allamakee County255
- Chickasaw County255
- Hancock County255
- Osceola County255
- Winneshiek County254
- Clay County253
- Floyd County251
- Dubuque County250
- Kossuth County250
- Palo Alto County249
- Howard County248
- Lyon County248
- Mitchell County246
- Worth County245
- Dickinson County236
- Winnebago County235
- Emmet County229
The latest severe thunderstorm watches
The most recent on file, newest first.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Sep 6, 4:42 PM CDT | Severe Thunderstorm Watch | SPC | Adair, Adams, Audubon, Boone, Cass, Clarke and 16 more | 5 hr |
| Sep 1, 9:50 PM CDT | Severe Thunderstorm Watch | SPC | Buena Vista, Cerro Gordo, Cherokee, Clay, Dickinson, Emmet and 14 more | 7 hr |
| Sep 1, 3:50 PM CDT | Severe Thunderstorm Watch | SPC | Cherokee, Ida, Lyon, Plymouth, Sioux, Woodbury | 9 hr |
| Aug 21, 2:57 PM CDT | Severe Thunderstorm Watch | SPC | Clayton, Clinton, Dubuque, Jackson, Scott | 9 hr |
| Aug 19, 2:52 PM CDT | Severe Thunderstorm Watch | SPC | Page, Taylor | 5 hr |
| Aug 19, 9:53 AM CDT | Severe Thunderstorm Watch | SPC | Fremont | 6 hr |
| Aug 18, 6:48 PM CDT | Severe Thunderstorm Watch | SPC | Black Hawk, Bremer, Buena Vista, Butler, Calhoun, Cerro Gordo and 17 more | 114 min |
| Aug 18, 2:48 PM CDT | Severe Thunderstorm Watch | SPC | Allamakee, Buchanan, Chickasaw, Clayton, Delaware, Dubuque and 5 more | 6 hr |
| Aug 13, 5:47 AM CDT | Severe Thunderstorm Watch | SPC | Benton, Boone, Cedar, Clarke, Dallas, Des Moines and 29 more | 6 hr |
| Aug 13, 1:31 AM CDT | Severe Thunderstorm Watch | SPC | Adair, Adams, Audubon, Calhoun, Carroll, Cass and 13 more | 6 hr |
| Aug 12, 6:41 AM CDT | Severe Thunderstorm Watch | SPC | Cedar, Clinton, Des Moines, Johnson, Louisa, Muscatine and 2 more | 6 hr |
| Aug 12, 2:24 AM CDT | Severe Thunderstorm Watch | SPC | Adair, Adams, Audubon, Boone, Buena Vista, Calhoun and 33 more | 8 hr |
Nearby
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.