Alert archive / Iowa / Severe Thunderstorm Watches / 2012

Severe Thunderstorm Watches in Iowa, May 2012

20 severe thunderstorm watches in May 2012. 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 2012. Tap one for its archive.

Severe Thunderstorm Watches
20
Busiest day
May 4, 20124 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.

IssuedProductOfficeCountiesLasted
May 1, 4:58 PM CDTSevere Thunderstorm WatchSPCBuena Vista, Cherokee, Ida, Monona, Plymouth, Woodbury4 hr
May 1, 9:18 PM CDTSevere Thunderstorm WatchSPCAdair, Adams, Audubon, Black Hawk, Boone, Buena Vista and 54 more7 hr
May 3, 12:50 AM CDTSevere Thunderstorm WatchSPCAdams, Cass, Fremont, Mills, Montgomery, Page and 2 more4 hr
May 4, 12:53 AM CDTSevere Thunderstorm WatchSPCDes Moines, Henry, Jefferson, Lee, Van Buren4 hr
May 4, 2:00 PM CDTSevere Thunderstorm WatchSPCBuena Vista, Calhoun, Carroll, Cerro Gordo, Cherokee, Clay and 23 more9 hr
May 4, 5:52 PM CDTSevere Thunderstorm WatchSPCFremont, Harrison, Mills, Monona, Montgomery, Page and 2 more5 hr
May 4, 6:01 PM CDTSevere Thunderstorm WatchSPCBenton, Black Hawk, Boone, Bremer, Buchanan, Butler and 22 more3 hr
May 5, 6:49 AM CDTSevere Thunderstorm WatchSPCCherokee, Lyon, O'Brien, Osceola, Plymouth, Sioux7 hr
May 5, 11:38 AM CDTSevere Thunderstorm WatchSPCAllamakee, Cerro Gordo, Chickasaw, Clayton, Emmet, Fayette and 8 more6 hr
May 5, 6:46 PM CDTSevere Thunderstorm WatchSPCLyon6 hr
May 5, 10:03 PM CDTSevere Thunderstorm WatchSPCBuena Vista, Cherokee, Clay, Dickinson, Ida, Lyon and 6 more7 hr
May 6, 7:17 AM CDTSevere Thunderstorm WatchSPCAdair, Adams, Appanoose, Clarke, Dallas, Davis and 16 more6 hr
May 6, 9:29 AM CDTSevere Thunderstorm WatchSPCBenton, Cedar, Clinton, Des Moines, Henry, Iowa and 12 more4 hr
May 6, 1:42 PM CDTSevere Thunderstorm WatchSPCDes Moines, Henry, Lee, Louisa, Van Buren7 hr
May 19, 3:25 PM CDTSevere Thunderstorm WatchSPCFremont, Harrison, Mills, Monona, Pottawattamie, Shelby7 hr
May 19, 6:52 PM CDTSevere Thunderstorm WatchSPCAdair, Audubon, Buena Vista, Calhoun, Carroll, Cass and 17 more5 hr
May 23, 4:07 PM CDTSevere Thunderstorm WatchSPCAudubon, Buena Vista, Calhoun, Carroll, Cherokee, Clay and 23 more7 hr
May 24, 3:30 PM CDTSevere Thunderstorm WatchSPCAllamakee, Appanoose, Benton, Black Hawk, Bremer, Buchanan and 39 more4 hr
May 27, 3:42 PM CDTSevere Thunderstorm WatchSPCBuena Vista, Cherokee, Clay, Crawford, Dickinson, Emmet and 12 more8 hr
May 28, 12:54 PM CDTSevere Thunderstorm WatchSPCClayton7 hr

By county

Every county with at least one alert. A county page lists each alert that covered it.

59 more counties

Nearby

Alerts in force nowTornadoes on recordThe radar archive20112013

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.