Alert archive / Iowa / Severe Thunderstorm Watches

Severe Thunderstorm Watches in Iowa, 2020

30 severe thunderstorm watches in 2020. 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 2020. Tap one for its archive.

Severe Thunderstorm Watches
30
Busiest month
June7 severe thunderstorm watches
Busiest day
May 24, 20203 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.

IssuedProductOfficeCountiesLasted
Apr 7, 5:26 PM CDTSevere Thunderstorm WatchSPCCedar, Clinton, Iowa, Jackson, Johnson, Jones and 6 more6 hr
Apr 8, 3:08 PM CDTSevere Thunderstorm WatchSPCDes Moines, Lee6 hr
May 14, 4:24 PM CDTSevere Thunderstorm WatchSPCAppanoose, Clarke, Dallas, Davis, Decatur, Jasper and 13 more9 hr
May 14, 6:15 PM CDTSevere Thunderstorm WatchSPCCedar, Clinton, Des Moines, Henry, Iowa, Jefferson and 8 more8 hr
May 23, 11:58 PM CDTSevere Thunderstorm WatchSPCCherokee, Harrison, Ida, Lyon, Mills, Monona and 6 more6 hr
May 24, 5:30 AM CDTSevere Thunderstorm WatchSPCAdair, Adams, Appanoose, Audubon, Boone, Carroll and 31 more4 hr
May 24, 1:40 PM CDTSevere Thunderstorm WatchSPCAdair, Adams, Appanoose, Audubon, Boone, Carroll and 32 more6 hr
Jun 2, 4:39 PM CDTSevere Thunderstorm WatchSPCAllamakee, Cerro Gordo, Chickasaw, Clay, Clayton, Dickinson and 13 more5 hr
Jun 4, 11:32 PM CDTSevere Thunderstorm WatchSPCFremont, Mills, Montgomery, Page7 hr
Jun 5, 1:02 AM CDTSevere Thunderstorm WatchSPCAdair, Allamakee, Appanoose, Audubon, Benton, Black Hawk and 54 more6 hr
Jun 21, 3:19 PM CDTSevere Thunderstorm WatchSPCBuena Vista, Cherokee, Clay, Dickinson, Harrison, Ida and 10 more7 hr
Jun 21, 3:55 PM CDTSevere Thunderstorm WatchSPCCerro Gordo, Crawford, Emmet, Hancock, Howard, Humboldt and 8 more6 hr
Jun 26, 1:38 PM CDTSevere Thunderstorm WatchSPCAllamakee, Buchanan, Cedar, Clayton, Clinton, Delaware and 16 more8 hr
Jun 26, 7:50 PM CDTSevere Thunderstorm WatchSPCAdams, Appanoose, Clarke, Davis, Decatur, Fremont and 10 more8 hr
Jun 30, 11:25 PM CDTSevere Thunderstorm WatchSPCFremont, Harrison, Mills, Monona, Montgomery, Page and 2 more7 hr
Jul 9, 11:05 AM CDTSevere Thunderstorm WatchSPCAllamakee, Appanoose, Benton, Black Hawk, Bremer, Buchanan and 40 more8 hr
Jul 11, 10:04 AM CDTSevere Thunderstorm WatchSPCBenton, Cedar, Clinton, Des Moines, Henry, Iowa and 8 more3 hr
Jul 11, 1:10 PM CDTSevere Thunderstorm WatchSPCBlack Hawk, Boone, Bremer, Buena Vista, Butler, Cerro Gordo and 29 more7 hr
Jul 11, 3:58 PM CDTSevere Thunderstorm WatchSPCBenton, Buchanan, Cedar, Clinton, Delaware, Des Moines and 15 more8 hr
Jul 14, 4:11 PM CDTSevere Thunderstorm WatchSPCAdair, Adams, Allamakee, Appanoose, Audubon, Benton and 48 more7 hr
Aug 8, 10:10 PM CDTSevere Thunderstorm WatchSPCLyon, Osceola, Sioux6 hr
Aug 10, 6:06 AM CDTSevere Thunderstorm WatchSPCBuena Vista, Cherokee, Clay, Dickinson, Ida, Lyon and 6 more5 hr
Aug 10, 8:56 AM CDTSevere Thunderstorm WatchSPCAdair, Audubon, Black Hawk, Boone, Bremer, Butler and 30 more5 hr
Aug 10, 11:26 AM CDTSevere Thunderstorm Watch PDSSPCBenton, Buchanan, Cedar, Clayton, Clinton, Delaware and 17 more7 hr
Aug 14, 2:17 PM CDTSevere Thunderstorm WatchSPCBuena Vista, Cherokee, Clay, Dickinson, Harrison, Ida and 8 more6 hr
Aug 28, 3:16 PM CDTSevere Thunderstorm WatchSPCBenton, Black Hawk, Buchanan, Cedar, Clayton, Clinton and 19 more4 hr
Sep 5, 9:34 PM CDTSevere Thunderstorm WatchSPCAllamakee, Benton, Black Hawk, Boone, Bremer, Buchanan and 47 more7 hr
Sep 6, 2:53 AM CDTSevere Thunderstorm WatchSPCBenton, Black Hawk, Boone, Bremer, Buchanan, Butler and 33 more6 hr
Oct 11, 4:54 PM CDTSevere Thunderstorm WatchSPCAdair, Adams, Audubon, Boone, Buena Vista, Calhoun and 32 more8 hr
Nov 10, 11:22 AM CSTSevere Thunderstorm WatchSPCClinton, Des Moines, Henry, Jackson, Lee, Louisa and 2 more7 hr

By county

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

59 more counties

The busiest days

Days with the most alerts issued, by UTC date.

Nearby

Alerts in force nowTornadoes on recordThe radar archive20192021

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.