Alert archive / Iowa / Severe Thunderstorm Watches
Severe Thunderstorm Watches in Iowa, 2020
30 severe thunderstorm watches in 2020. 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 in 2020. Tap one for its archive.
- Severe Thunderstorm Watches
- 30
- Busiest month
- June7 severe thunderstorm watches
- Busiest day
- May 24, 20203 severe thunderstorm watches
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 |
|---|---|---|---|---|
| Apr 7, 5:26 PM CDT | Severe Thunderstorm Watch | SPC | Cedar, Clinton, Iowa, Jackson, Johnson, Jones and 6 more | 6 hr |
| Apr 8, 3:08 PM CDT | Severe Thunderstorm Watch | SPC | Des Moines, Lee | 6 hr |
| May 14, 4:24 PM CDT | Severe Thunderstorm Watch | SPC | Appanoose, Clarke, Dallas, Davis, Decatur, Jasper and 13 more | 9 hr |
| May 14, 6:15 PM CDT | Severe Thunderstorm Watch | SPC | Cedar, Clinton, Des Moines, Henry, Iowa, Jefferson and 8 more | 8 hr |
| May 23, 11:58 PM CDT | Severe Thunderstorm Watch | SPC | Cherokee, Harrison, Ida, Lyon, Mills, Monona and 6 more | 6 hr |
| May 24, 5:30 AM CDT | Severe Thunderstorm Watch | SPC | Adair, Adams, Appanoose, Audubon, Boone, Carroll and 31 more | 4 hr |
| May 24, 1:40 PM CDT | Severe Thunderstorm Watch | SPC | Adair, Adams, Appanoose, Audubon, Boone, Carroll and 32 more | 6 hr |
| Jun 2, 4:39 PM CDT | Severe Thunderstorm Watch | SPC | Allamakee, Cerro Gordo, Chickasaw, Clay, Clayton, Dickinson and 13 more | 5 hr |
| Jun 4, 11:32 PM CDT | Severe Thunderstorm Watch | SPC | Fremont, Mills, Montgomery, Page | 7 hr |
| Jun 5, 1:02 AM CDT | Severe Thunderstorm Watch | SPC | Adair, Allamakee, Appanoose, Audubon, Benton, Black Hawk and 54 more | 6 hr |
| Jun 21, 3:19 PM CDT | Severe Thunderstorm Watch | SPC | Buena Vista, Cherokee, Clay, Dickinson, Harrison, Ida and 10 more | 7 hr |
| Jun 21, 3:55 PM CDT | Severe Thunderstorm Watch | SPC | Cerro Gordo, Crawford, Emmet, Hancock, Howard, Humboldt and 8 more | 6 hr |
| Jun 26, 1:38 PM CDT | Severe Thunderstorm Watch | SPC | Allamakee, Buchanan, Cedar, Clayton, Clinton, Delaware and 16 more | 8 hr |
| Jun 26, 7:50 PM CDT | Severe Thunderstorm Watch | SPC | Adams, Appanoose, Clarke, Davis, Decatur, Fremont and 10 more | 8 hr |
| Jun 30, 11:25 PM CDT | Severe Thunderstorm Watch | SPC | Fremont, Harrison, Mills, Monona, Montgomery, Page and 2 more | 7 hr |
| Jul 9, 11:05 AM CDT | Severe Thunderstorm Watch | SPC | Allamakee, Appanoose, Benton, Black Hawk, Bremer, Buchanan and 40 more | 8 hr |
| Jul 11, 10:04 AM CDT | Severe Thunderstorm Watch | SPC | Benton, Cedar, Clinton, Des Moines, Henry, Iowa and 8 more | 3 hr |
| Jul 11, 1:10 PM CDT | Severe Thunderstorm Watch | SPC | Black Hawk, Boone, Bremer, Buena Vista, Butler, Cerro Gordo and 29 more | 7 hr |
| Jul 11, 3:58 PM CDT | Severe Thunderstorm Watch | SPC | Benton, Buchanan, Cedar, Clinton, Delaware, Des Moines and 15 more | 8 hr |
| Jul 14, 4:11 PM CDT | Severe Thunderstorm Watch | SPC | Adair, Adams, Allamakee, Appanoose, Audubon, Benton and 48 more | 7 hr |
| Aug 8, 10:10 PM CDT | Severe Thunderstorm Watch | SPC | Lyon, Osceola, Sioux | 6 hr |
| Aug 10, 6:06 AM CDT | Severe Thunderstorm Watch | SPC | Buena Vista, Cherokee, Clay, Dickinson, Ida, Lyon and 6 more | 5 hr |
| Aug 10, 8:56 AM CDT | Severe Thunderstorm Watch | SPC | Adair, Audubon, Black Hawk, Boone, Bremer, Butler and 30 more | 5 hr |
| Aug 10, 11:26 AM CDT | Severe Thunderstorm Watch | SPC | Benton, Buchanan, Cedar, Clayton, Clinton, Delaware and 17 more | 7 hr |
| Aug 14, 2:17 PM CDT | Severe Thunderstorm Watch | SPC | Buena Vista, Cherokee, Clay, Dickinson, Harrison, Ida and 8 more | 6 hr |
| Aug 28, 3:16 PM CDT | Severe Thunderstorm Watch | SPC | Benton, Black Hawk, Buchanan, Cedar, Clayton, Clinton and 19 more | 4 hr |
| Sep 5, 9:34 PM CDT | Severe Thunderstorm Watch | SPC | Allamakee, Benton, Black Hawk, Boone, Bremer, Buchanan and 47 more | 7 hr |
| Sep 6, 2:53 AM CDT | Severe Thunderstorm Watch | SPC | Benton, Black Hawk, Boone, Bremer, Buchanan, Butler and 33 more | 6 hr |
| Oct 11, 4:54 PM CDT | Severe Thunderstorm Watch | SPC | Adair, Adams, Audubon, Boone, Buena Vista, Calhoun and 32 more | 8 hr |
| Nov 10, 11:22 AM CST | Severe Thunderstorm Watch | SPC | Clinton, Des Moines, Henry, Jackson, Lee, Louisa and 2 more | 7 hr |
By county
Every county with at least one alert. A county page lists each alert that covered it.
- Clinton County11
- Iowa County11
- Johnson County11
- Jasper County11
- Mahaska County11
- Poweshiek County11
- Cedar County10
- Jackson County10
- Linn County10
- Washington County10
- Marshall County10
- Tama County10
- Jones County9
- Keokuk County9
- Louisa County9
- Muscatine County9
- Scott County9
- Polk County9
- Boone County9
- Story County9
- Fayette County9
- Benton County9
- Buchanan County9
- Delaware County9
- Des Moines County8
- Marion County8
- Monroe County8
- Wapello County8
- Mills County8
- Cerro Gordo County8
- Clayton County8
- Osceola County8
- Black Hawk County8
- Grundy County8
- Lee County7
- Appanoose County7
- Clarke County7
- Dallas County7
- Davis County7
- Lucas County7
59 more counties
- Madison County7
- Ringgold County7
- Union County7
- Henry County7
- O'Brien County7
- Pottawattamie County7
- Clay County7
- Dickinson County7
- Howard County7
- Mitchell County7
- Winneshiek County7
- Worth County7
- Bremer County7
- Butler County7
- Franklin County7
- Wright County7
- Dubuque County7
- Decatur County6
- Taylor County6
- Warren County6
- Wayne County6
- Harrison County6
- Lyon County6
- Monona County6
- Shelby County6
- Sioux County6
- Adair County6
- Audubon County6
- Carroll County6
- Cass County6
- Crawford County6
- Fremont County6
- Greene County6
- Guthrie County6
- Montgomery County6
- Page County6
- Allamakee County6
- Chickasaw County6
- Floyd County6
- Hancock County6
- Winnebago County6
- Hamilton County6
- Hardin County6
- Humboldt County6
- Pocahontas County6
- Webster County6
- Buena Vista County6
- Jefferson County5
- Van Buren County5
- Cherokee County5
- Ida County5
- Plymouth County5
- Woodbury County5
- Adams County5
- Emmet County5
- Kossuth County5
- Palo Alto County5
- Calhoun County5
- Sac County4
The busiest days
Days with the most alerts issued, by UTC date.
Nearby
Alerts in force nowTornadoes on recordThe radar archive20192021
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.