Alert archive / Iowa / Severe Thunderstorm Watches / 2018
Severe Thunderstorm Watches in Iowa, May 2018
7 severe thunderstorm watches in May 2018. 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 2018. Tap one for its archive.
- Severe Thunderstorm Watches
- 7
- Busiest day
- May 29, 20182 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 1, 5:47 PM CDT | Severe Thunderstorm Watch | SPC | Adair, Allamakee, Audubon, Benton, Black Hawk, Boone and 44 more | 6 hr |
| May 2, 3:56 PM CDT | Severe Thunderstorm Watch | SPC | Cedar, Clinton, Des Moines, Henry, Iowa, Jackson and 10 more | 9 hr |
| May 3, 2:57 PM CDT | Severe Thunderstorm Watch | SPC | Adair, Adams, Appanoose, Audubon, Cass, Clarke and 24 more | 6 hr |
| May 14, 2:54 PM CDT | Severe Thunderstorm Watch | SPC | Scott | 6 hr |
| May 25, 2:02 PM CDT | Severe Thunderstorm Watch | SPC | Allamakee, Chickasaw, Clayton, Fayette, Floyd, Howard and 2 more | 8 hr |
| May 29, 1:43 PM CDT | Severe Thunderstorm Watch | SPC | Adair, Audubon, Boone, Buena Vista, Calhoun, Carroll and 26 more | 6 hr |
| May 29, 2:40 PM CDT | Severe Thunderstorm Watch | SPC | Fremont, Mills, Montgomery, Page, Pottawattamie | 7 hr |
By county
Every county with at least one alert. A county page lists each alert that covered it.
- Adair County3
- Audubon County3
- Cass County3
- Dallas County3
- Guthrie County3
- Madison County3
- Polk County3
- Warren County3
- Allamakee County2
- Boone County2
- Calhoun County2
- Carroll County2
- Cerro Gordo County2
- Chickasaw County2
- Clayton County2
- Crawford County2
- Emmet County2
- Fayette County2
- Floyd County2
- Franklin County2
- Greene County2
- Hamilton County2
- Hancock County2
- Hardin County2
- Howard County2
- Humboldt County2
- Jasper County2
- Kossuth County2
- Mahaska County2
- Marion County2
- Marshall County2
- Mitchell County2
- Palo Alto County2
- Pocahontas County2
- Poweshiek County2
- Sac County2
- Story County2
- Tama County2
- Webster County2
- Winnebago County2
46 more counties
- Winneshiek County2
- Worth County2
- Wright County2
- Scott County2
- Fremont County2
- Mills County2
- Montgomery County2
- Page County2
- Benton County1
- Black Hawk County1
- Bremer County1
- Buchanan County1
- Butler County1
- Delaware County1
- Grundy County1
- Cedar County1
- Clinton County1
- Des Moines County1
- Henry County1
- Iowa County1
- Jackson County1
- Jefferson County1
- Johnson County1
- Jones County1
- Keokuk County1
- Lee County1
- Louisa County1
- Muscatine County1
- Van Buren County1
- Washington County1
- Adams County1
- Appanoose County1
- Clarke County1
- Davis County1
- Decatur County1
- Lucas County1
- Monroe County1
- Ringgold County1
- Taylor County1
- Union County1
- Wapello County1
- Wayne County1
- Buena Vista County1
- Clay County1
- Dickinson County1
- Pottawattamie County1
Nearby
Alerts in force nowTornadoes on recordThe radar archive20172019
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.