Alert archive / Iowa / Severe Thunderstorm Watches / 2009
Severe Thunderstorm Watches in Iowa, May 2009
3 severe thunderstorm watches in May 2009. 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 2009. Tap one for its archive.
- Severe Thunderstorm Watches
- 3
- Busiest day
- May 8, 20092 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 8, 1:21 PM CDT | Severe Thunderstorm Watch | SPC | Adair, Adams, Appanoose, Audubon, Black Hawk, Boone and 44 more | 6 hr |
| May 8, 6:10 PM CDT | Severe Thunderstorm Watch | SPC | Benton, Cedar, Clayton, Clinton, Delaware, Des Moines and 15 more | 4 hr |
| May 15, 7:42 AM CDT | Severe Thunderstorm Watch | SPC | Fremont, Mills, Montgomery, Page | 5 hr |
By county
Every county with at least one alert. A county page lists each alert that covered it.
- Fremont County2
- Mills County2
- Montgomery County2
- Page County2
- Adair County1
- Adams County1
- Appanoose County1
- Audubon County1
- Black Hawk County1
- Boone County1
- Bremer County1
- Butler County1
- Calhoun County1
- Carroll County1
- Cass County1
- Clarke County1
- Crawford County1
- Dallas County1
- Davis County1
- Decatur County1
- Franklin County1
- Greene County1
- Grundy County1
- Guthrie County1
- Hamilton County1
- Hardin County1
- Humboldt County1
- Jasper County1
- Lucas County1
- Madison County1
- Mahaska County1
- Marion County1
- Marshall County1
- Monroe County1
- Pocahontas County1
- Polk County1
- Pottawattamie County1
- Poweshiek County1
- Ringgold County1
- Sac County1
31 more counties
- Shelby County1
- Story County1
- Tama County1
- Taylor County1
- Union County1
- Wapello County1
- Warren County1
- Wayne County1
- Webster County1
- Wright County1
- Benton County1
- Cedar County1
- Clayton County1
- Clinton County1
- Delaware County1
- Des Moines County1
- Dubuque County1
- Henry County1
- Iowa County1
- Jackson County1
- Jefferson County1
- Johnson County1
- Jones County1
- Keokuk County1
- Lee County1
- Linn County1
- Louisa County1
- Muscatine County1
- Scott County1
- Van Buren County1
- Washington County1
Nearby
Alerts in force nowTornadoes on recordThe radar archive20082010
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.