Alert archive / Iowa / Mesoscale Discussions / 2026

Mesoscale Discussions in Iowa, May 2026

28 mesoscale discussions in May 2026. 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 mesoscale discussions reaches back to 2003.

Mesoscale Discussions by county

Each county as a circle sized by its count in May 2026. Tap one for its archive.

Mesoscale Discussions
28
Busiest day
May 18, 20269 mesoscale discussions

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 4, 3:42 PM CDTMesoscale DiscussionSPCClinton, Scott2 hr
May 4, 6:34 PM CDTMesoscale DiscussionSPCDavis, Des Moines, Henry, Jefferson, Lee, Van Buren86 min
May 15, 3:55 PM CDTMesoscale DiscussionSPCAdair, Adams, Audubon, Black Hawk, Boone, Bremer and 53 more2 hr
May 15, 7:29 PM CDTMesoscale DiscussionSPCAdair, Adams, Allamakee, Audubon, Black Hawk, Boone and 62 more2 hr
May 15, 9:07 PM CDTMesoscale DiscussionSPCAllamakee, Benton, Black Hawk, Bremer, Buchanan, Butler and 15 more113 min
May 15, 10:53 PM CDTMesoscale DiscussionSPCAdair, Adams, Audubon, Black Hawk, Boone, Bremer and 45 more2 hr
May 16, 3:20 PM CDTMesoscale DiscussionSPCAdams, Clarke, Decatur, Fremont, Montgomery, Page and 3 more85 min
May 16, 6:46 PM CDTMesoscale DiscussionSPCAdams, Appanoose, Clarke, Decatur, Montgomery, Ringgold and 3 more89 min
May 17, 1:11 PM CDTMesoscale DiscussionSPCCherokee, Harrison, Ida, Lyon, Monona, O'Brien and 4 more2 hr
May 17, 3:31 PM CDTMesoscale DiscussionSPCLyon, O'Brien, Osceola, Sioux89 min
May 17, 5:45 PM CDTMesoscale DiscussionSPCBuena Vista, Cerro Gordo, Clay, Emmet, Floyd, Franklin and 10 more60 min
May 17, 6:53 PM CDTMesoscale DiscussionSPCCherokee, Crawford, Fremont, Harrison, Ida, Mills and 6 more67 min
May 17, 7:40 PM CDTMesoscale DiscussionSPCAdair, Adams, Audubon, Boone, Calhoun, Carroll and 29 more65 min
May 17, 7:49 PM CDTMesoscale DiscussionSPCCerro Gordo, Emmet, Floyd, Franklin, Hancock, Howard and 7 more56 min
May 17, 8:18 PM CDTMesoscale DiscussionSPCBuena Vista, Cherokee, Clay, Emmet, Humboldt, Ida and 5 more27 min
May 17, 9:30 PM CDTMesoscale DiscussionSPCAdair, Adams, Audubon, Boone, Butler, Calhoun and 37 more90 min
May 17, 10:32 PM CDTMesoscale DiscussionSPCAllamakee, Black Hawk, Boone, Bremer, Buchanan, Butler and 14 more118 min
May 18, 1:24 AM CDTMesoscale DiscussionSPCAppanoose, Cedar, Davis, Dubuque, Henry, Iowa and 12 more96 min
May 18, 6:51 AM CDTMesoscale DiscussionSPCDes Moines, Henry, Lee84 min
May 18, 3:29 PM CDTMesoscale DiscussionSPCAdair, Adams, Audubon, Cass, Clarke, Decatur and 12 more2 hr
May 18, 5:10 PM CDTMesoscale DiscussionSPCCherokee, Lyon, Monona, O'Brien, Osceola, Plymouth and 2 more95 min
May 18, 8:54 PM CDTMesoscale DiscussionSPCAppanoose, Clarke, Decatur, Jasper, Lucas, Mahaska and 7 more3 hr
May 22, 5:24 PM CDTMesoscale DiscussionSPCFremont, Harrison, Mills, Monona, Pottawattamie2 hr
May 24, 3:34 PM CDTMesoscale DiscussionSPCLyon, Sioux86 min
May 24, 6:49 PM CDTMesoscale DiscussionSPCCherokee, Clay, Dickinson, Lyon, O'Brien, Osceola and 2 more116 min
May 24, 8:48 PM CDTMesoscale DiscussionSPCCherokee, Dickinson, Lyon, O'Brien, Osceola, Plymouth and 2 more87 min
May 25, 7:13 PM CDTMesoscale DiscussionSPCBuena Vista, Cherokee, Clay, Dickinson, Emmet, Humboldt and 12 more92 min
May 31, 3:20 PM CDTMesoscale DiscussionSPCLyon, Plymouth, Sioux2 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 archive2025

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.