Alert archive / Iowa / Severe Thunderstorm Watches / 2017
Severe Thunderstorm Watches in Iowa, May 2017
6 severe thunderstorm watches in May 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 May 2017. Tap one for its archive.
- Severe Thunderstorm Watches
- 6
- Busiest day
- May 16, 20173 severe thunderstorm watches
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 |
|---|---|---|---|---|
| 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 |
By county
Every county with at least one alert. A county page lists each alert that covered it.
- Allamakee County3
- Howard County3
- Mitchell County3
- Winneshiek County3
- Clarke County2
- Decatur County2
- Lucas County2
- Marion County2
- Warren County2
- Wayne County2
- Black Hawk County2
- Bremer County2
- Butler County2
- Calhoun County2
- Cerro Gordo County2
- Chickasaw County2
- Fayette County2
- Floyd County2
- Franklin County2
- Grundy County2
- Hamilton County2
- Hancock County2
- Hardin County2
- Humboldt County2
- Kossuth County2
- Pocahontas County2
- Webster County2
- Winnebago County2
- Worth County2
- Wright County2
- Cherokee County2
- Plymouth County2
- Woodbury County2
- Appanoose County1
- Davis County1
- Des Moines County1
- Henry County1
- Jefferson County1
- Keokuk County1
- Lee County1
51 more counties
- Louisa County1
- Mahaska County1
- Monroe County1
- Muscatine County1
- Scott County1
- Van Buren County1
- Wapello County1
- Washington County1
- Buchanan County1
- Clayton County1
- Delaware County1
- Dubuque County1
- Emmet County1
- Palo Alto County1
- Clay County1
- Dickinson County1
- Lyon County1
- O'Brien County1
- Osceola County1
- Sioux County1
- Adair County1
- Adams County1
- Audubon County1
- Buena Vista County1
- Carroll County1
- Cass County1
- Crawford County1
- Fremont County1
- Greene County1
- Guthrie County1
- Harrison County1
- Ida County1
- Mills County1
- Monona County1
- Montgomery County1
- Page County1
- Pottawattamie County1
- Ringgold County1
- Sac County1
- Shelby County1
- Taylor County1
- Union County1
- Boone County1
- Dallas County1
- Jasper County1
- Madison County1
- Marshall County1
- Polk County1
- Poweshiek County1
- Story County1
- Tama County1
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.