Alert archive / Iowa / Severe Thunderstorm Watches
Severe Thunderstorm Watches in Iowa, 2017
31 severe thunderstorm watches in 2017. 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 2017. Tap one for its archive.
- Severe Thunderstorm Watches
- 31
- Busiest month
- June11 severe thunderstorm watches
- Busiest day
- July 19, 20174 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 9, 9:01 PM CDT | Severe Thunderstorm Watch | SPC | Butler, Cerro Gordo, Chickasaw, Floyd, Franklin, Hancock and 5 more | 4 hr |
| Apr 9, 11:28 PM CDT | Severe Thunderstorm Watch | SPC | Appanoose, Clarke, Davis, Decatur, Lucas, Mahaska and 7 more | 4 hr |
| Apr 15, 5:05 PM CDT | Severe Thunderstorm Watch | SPC | Adair, Adams, Audubon, Boone, Calhoun, Carroll and 35 more | 7 hr |
| Apr 19, 8:57 PM CDT | Severe Thunderstorm Watch | SPC | Benton, Black Hawk, Boone, Bremer, Buchanan, Butler and 30 more | 4 hr |
| May 10, 12:59 PM CDT | Severe Thunderstorm Watch | SPC | Appanoose, Clarke, Davis, Decatur, Des Moines, Henry and 15 more | 7 hr |
| May 15, 5:11 PM CDT | Severe Thunderstorm Watch | SPC | Allamakee, Black Hawk, Bremer, Buchanan, Butler, Calhoun and 24 more | 9 hr |
| May 15, 9:48 PM CDT | Severe Thunderstorm Watch | SPC | Allamakee, Howard, Mitchell, Winneshiek | 5 hr |
| May 15, 11:54 PM CDT | Severe Thunderstorm Watch | SPC | Cherokee, Clay, Dickinson, Lyon, O'Brien, Osceola and 3 more | 3 hr |
| May 16, 4:57 PM CDT | Severe Thunderstorm Watch | SPC | Adair, Adams, Audubon, Buena Vista, Calhoun, Carroll and 23 more | 7 hr |
| May 16, 8:46 PM CDT | Severe Thunderstorm Watch | SPC | Allamakee, Black Hawk, Boone, Bremer, Butler, Cerro Gordo and 29 more | 5 hr |
| Jun 12, 11:47 AM CDT | Severe Thunderstorm Watch | SPC | Allamakee, Cerro Gordo, Chickasaw, Clayton, Emmet, Fayette and 9 more | 7 hr |
| Jun 13, 5:25 PM CDT | Severe Thunderstorm Watch | SPC | Harrison, Monona | 8 hr |
| Jun 14, 12:40 PM CDT | Severe Thunderstorm Watch | SPC | Clinton, Des Moines, Henry, Jackson, Lee, Louisa and 3 more | 7 hr |
| Jun 15, 6:39 PM CDT | Severe Thunderstorm Watch | SPC | Adair, Adams, Appanoose, Benton, Black Hawk, Bremer and 40 more | 6 hr |
| Jun 16, 3:30 PM CDT | Severe Thunderstorm Watch | SPC | Fremont, Harrison, Mills, Monona, Montgomery, Page and 2 more | 8 hr |
| Jun 16, 3:53 PM CDT | Severe Thunderstorm Watch | SPC | Allamakee, Black Hawk, Bremer, Buena Vista, Butler, Calhoun and 33 more | 7 hr |
| Jun 16, 7:52 PM CDT | Severe Thunderstorm Watch | SPC | Adair, Adams, Appanoose, Audubon, Boone, Cass and 23 more | 9 hr |
| Jun 16, 10:25 PM CDT | Severe Thunderstorm Watch | SPC | Benton, Buchanan, Cedar, Clinton, Delaware, Dubuque and 10 more | 5 hr |
| Jun 17, 5:39 PM CDT | Severe Thunderstorm Watch | SPC | Appanoose, Davis, Des Moines, Henry, Jefferson, Lee and 6 more | 7 hr |
| Jun 27, 7:35 PM CDT | Severe Thunderstorm Watch | SPC | Cherokee, Lyon, O'Brien, Osceola, Plymouth, Sioux and 1 more | 5 hr |
| Jun 29, 3:42 PM CDT | Severe Thunderstorm Watch | SPC | Audubon, Buena Vista, Calhoun, Carroll, Cass, Cherokee and 18 more | 8 hr |
| Jul 9, 9:40 PM CDT | Severe Thunderstorm Watch | SPC | Allamakee, Black Hawk, Bremer, Butler, Cerro Gordo, Chickasaw and 22 more | 5 hr |
| Jul 19, 12:36 PM CDT | Severe Thunderstorm Watch | SPC | Bremer, Butler, Cerro Gordo, Clay, Dickinson, Emmet and 7 more | 5 hr |
| Jul 19, 3:29 PM CDT | Severe Thunderstorm Watch | SPC | Allamakee, Chickasaw, Clayton, Fayette, Floyd, Howard and 2 more | 6 hr |
| Jul 19, 4:52 PM CDT | Severe Thunderstorm Watch | SPC | Lyon, Plymouth, Sioux, Woodbury | 6 hr |
| Jul 19, 5:45 PM CDT | Severe Thunderstorm Watch | SPC | Buchanan, Cedar, Clinton, Delaware, Dubuque, Jackson and 3 more | 6 hr |
| Jul 21, 4:52 PM CDT | Severe Thunderstorm Watch | SPC | Benton, Black Hawk, Boone, Bremer, Buchanan, Butler and 35 more | 9 hr |
| Aug 10, 2:47 PM CDT | Severe Thunderstorm Watch | SPC | Cedar, Clinton, Jackson, Muscatine, Scott | 6 hr |
| Aug 13, 4:00 PM CDT | Severe Thunderstorm Watch | SPC | Lyon | 11 hr |
| Aug 18, 4:51 PM CDT | Severe Thunderstorm Watch | SPC | Adair, Audubon, Boone, Buena Vista, Butler, Calhoun and 37 more | 8 hr |
| Aug 21, 11:33 AM CDT | Severe Thunderstorm Watch | SPC | Buena Vista, Cherokee, Clay, Dickinson, Ida, Lyon and 6 more | 7 hr |
By county
Every county with at least one alert. A county page lists each alert that covered it.
- Butler County10
- Marion County9
- Warren County9
- Grundy County9
- Hardin County9
- Cerro Gordo County8
- Chickasaw County8
- Franklin County8
- Hancock County8
- Howard County8
- Mitchell County8
- Winneshiek County8
- Worth County8
- Mahaska County8
- Hamilton County8
- Bremer County8
- Scott County8
- Fayette County8
- Floyd County7
- Wright County7
- Lucas County7
- Wayne County7
- Dallas County7
- Jasper County7
- Marshall County7
- Polk County7
- Poweshiek County7
- Story County7
- Tama County7
- Black Hawk County7
- Muscatine County7
- Allamakee County7
- Clayton County7
- Kossuth County7
- Winnebago County7
- Cherokee County7
- Clay County7
- Plymouth County7
- Woodbury County7
- Clarke County6
59 more counties
- Decatur County6
- Wapello County6
- Boone County6
- Calhoun County6
- Madison County6
- Monona County6
- Webster County6
- Buchanan County6
- Clinton County6
- Delaware County6
- Jackson County6
- Louisa County6
- Emmet County6
- Palo Alto County6
- Pocahontas County6
- Dickinson County6
- Lyon County6
- O'Brien County6
- Sioux County6
- Appanoose County5
- Davis County5
- Monroe County5
- Ringgold County5
- Union County5
- Adair County5
- Audubon County5
- Carroll County5
- Cass County5
- Crawford County5
- Fremont County5
- Greene County5
- Guthrie County5
- Harrison County5
- Mills County5
- Montgomery County5
- Pottawattamie County5
- Sac County5
- Cedar County5
- Dubuque County5
- Keokuk County5
- Linn County5
- Humboldt County5
- Osceola County5
- Buena Vista County5
- Ida County5
- Adams County4
- Page County4
- Shelby County4
- Taylor County4
- Benton County4
- Iowa County4
- Johnson County4
- Jones County4
- Washington County4
- Des Moines County4
- Henry County4
- Jefferson County3
- Lee County3
- Van Buren County3
The busiest days
Days with the most alerts issued, by UTC date.
Nearby
Alerts in force nowTornadoes on recordThe radar archive20162018
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.