Alert archive / Iowa / Severe Thunderstorm Warnings / 2026

Severe Thunderstorm Warnings in Iowa, May 2026

132 severe thunderstorm warnings 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 severe thunderstorm warnings reaches back to 1986.

Severe Thunderstorm Warnings by county

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

Severe Thunderstorm Warnings: 132
Busiest day: May 16, 202651 severe thunderstorm warnings

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 4, 3:33 PM CDT	Severe Thunderstorm Warning	DVN	Cedar, Clinton, Scott	27 min
May 4, 4:26 PM CDT	Severe Thunderstorm Warning	DVN	Cedar, Muscatine	34 min
May 4, 5:08 PM CDT	Severe Thunderstorm Warning	DVN	Scott	37 min
May 4, 5:33 PM CDT	Severe Thunderstorm Warning	DVN	Des Moines	42 min
May 4, 6:55 PM CDT	Severe Thunderstorm Warning	DVN	Des Moines	49 min
May 4, 7:36 PM CDT	Severe Thunderstorm Warning	DVN	Des Moines, Lee	54 min
May 15, 5:23 PM CDT	Severe Thunderstorm Warning	FSD	Clay, Dickinson	9 min
May 15, 5:27 PM CDT	Severe Thunderstorm Warning	DMX	Emmet, Palo Alto	48 min
May 15, 5:53 PM CDT	Severe Thunderstorm Warning	OAX	Mills	52 min
May 15, 5:54 PM CDT	Severe Thunderstorm Warning	DMX	Emmet, Kossuth	51 min
May 15, 5:55 PM CDT	Severe Thunderstorm Warning	FSD	Ida, Woodbury	50 min
May 15, 6:05 PM CDT	Severe Thunderstorm Warning	OAX	Fremont, Mills	40 min
May 15, 6:08 PM CDT	Severe Thunderstorm Warning	FSD	Cherokee, O'Brien, Plymouth, Sioux	52 min
May 15, 6:14 PM CDT	Severe Thunderstorm Warning	DMX	Humboldt, Kossuth, Palo Alto, Pocahontas	24 min
May 15, 6:29 PM CDT	Severe Thunderstorm Warning	DMX	Calhoun, Pocahontas, Sac	46 min
May 15, 6:30 PM CDT	Severe Thunderstorm Warning Considerable damage threat	OAX	Fremont, Mills, Montgomery, Page, Pottawattamie	45 min
May 15, 6:31 PM CDT	Severe Thunderstorm Warning	FSD	Buena Vista	29 min
May 15, 6:33 PM CDT	Severe Thunderstorm Warning Considerable damage threat	DMX	Hancock, Kossuth, Winnebago	57 min
May 15, 6:45 PM CDT	Severe Thunderstorm Warning	FSD	Buena Vista, Cherokee, Ida, Woodbury	45 min
May 15, 6:46 PM CDT	Severe Thunderstorm Warning Considerable damage threat	DMX	Calhoun, Humboldt, Pocahontas, Webster	44 min
May 15, 6:47 PM CDT	Severe Thunderstorm Warning	FSD	Clay, O'Brien	43 min
May 15, 6:52 PM CDT	Severe Thunderstorm Warning Considerable damage threat	DMX	Adair, Adams, Cass, Ringgold, Taylor, Union	53 min
May 15, 6:55 PM CDT	Severe Thunderstorm Warning	DMX	Sac	50 min
May 15, 7:13 PM CDT	Severe Thunderstorm Warning	DMX	Humboldt, Pocahontas	32 min
May 15, 7:18 PM CDT	Severe Thunderstorm Warning	DMX	Cerro Gordo, Franklin, Hancock, Wright	57 min
May 15, 7:18 PM CDT	Severe Thunderstorm Warning	FSD	Buena Vista, Clay	42 min
May 15, 7:23 PM CDT	Severe Thunderstorm Warning	DMX	Cerro Gordo, Hancock, Worth	67 min
May 15, 7:27 PM CDT	Severe Thunderstorm Warning Considerable damage threat	DMX	Adair, Adams, Clarke, Decatur, Madison, Ringgold and 1 more	63 min
May 15, 7:31 PM CDT	Severe Thunderstorm Warning	DMX	Hancock, Humboldt, Kossuth, Winnebago	59 min
May 15, 7:31 PM CDT	Severe Thunderstorm Warning	DMX	Humboldt, Pocahontas, Webster	19 min
May 15, 7:31 PM CDT	Severe Thunderstorm Warning	FSD	Ida, Woodbury	44 min
May 15, 7:36 PM CDT	Severe Thunderstorm Warning	DMX	Sac	24 min
May 15, 7:52 PM CDT	Severe Thunderstorm Warning Considerable damage threat	DMX	Humboldt, Kossuth, Pocahontas	68 min
May 15, 7:54 PM CDT	Severe Thunderstorm Warning	DMX	Emmet, Kossuth, Palo Alto	23 min
May 15, 7:58 PM CDT	Severe Thunderstorm Warning	DMX	Sac	47 min
May 15, 8:06 PM CDT	Severe Thunderstorm Warning	DMX	Clarke, Decatur, Lucas, Madison, Marion, Warren and 1 more	39 min
May 15, 8:09 PM CDT	Severe Thunderstorm Warning Destructive damage threat	DMX	Cerro Gordo, Franklin, Hancock, Wright	66 min
May 15, 8:13 PM CDT	Severe Thunderstorm Warning	FSD	Buena Vista, Cherokee, Clay, O'Brien	35 min
May 15, 8:14 PM CDT	Severe Thunderstorm Warning Considerable damage threat	DMX	Hancock, Kossuth, Winnebago	41 min
May 15, 8:15 PM CDT	Severe Thunderstorm Warning	ARX	Floyd	45 min
May 15, 8:16 PM CDT	Severe Thunderstorm Warning Considerable damage threat	DMX	Hamilton, Humboldt, Webster, Wright	49 min
May 15, 8:27 PM CDT	Severe Thunderstorm Warning Considerable damage threat	FSD	Buena Vista, Cherokee	63 min
May 15, 8:33 PM CDT	Severe Thunderstorm Warning	FSD	Ida	14 min
May 15, 8:46 PM CDT	Severe Thunderstorm Warning	ARX	Chickasaw, Floyd	44 min
May 15, 9:19 PM CDT	Severe Thunderstorm Warning	DMX	Pocahontas	26 min
May 15, 9:43 PM CDT	Severe Thunderstorm Warning	OAX	Harrison, Monona	47 min
May 15, 10:07 PM CDT	Severe Thunderstorm Warning	DMX	Butler, Franklin, Grundy, Hardin	22 min
May 15, 10:14 PM CDT	Severe Thunderstorm Warning	DMX	Black Hawk, Bremer, Butler	46 min
May 15, 10:14 PM CDT	Severe Thunderstorm Warning	OAX	Harrison, Pottawattamie, Shelby	34 min
May 15, 10:24 PM CDT	Severe Thunderstorm Warning	ARX	Fayette	51 min
May 15, 10:25 PM CDT	Severe Thunderstorm Warning	OAX	Harrison, Monona	11 min
May 15, 10:27 PM CDT	Severe Thunderstorm Warning	DVN	Buchanan	48 min
May 15, 10:29 PM CDT	Severe Thunderstorm Warning	ARX	Allamakee, Clayton, Winneshiek	46 min
May 15, 10:57 PM CDT	Severe Thunderstorm Warning	ARX	Clayton	48 min
May 15, 11:00 PM CDT	Severe Thunderstorm Warning	DVN	Delaware	41 min
May 15, 11:06 PM CDT	Severe Thunderstorm Warning	ARX	Clayton	24 min
May 15, 11:17 PM CDT	Severe Thunderstorm Warning	DMX	Hamilton, Hardin	31 min
May 16, 4:19 PM CDT	Severe Thunderstorm Warning	DMX	Adams	26 min
May 16, 4:32 PM CDT	Severe Thunderstorm Warning	OAX	Fremont, Mills, Montgomery, Page	43 min
May 16, 4:42 PM CDT	Severe Thunderstorm Warning	OAX	Page	28 min
May 16, 4:48 PM CDT	Severe Thunderstorm Warning	DMX	Taylor	27 min
May 16, 5:00 PM CDT	Severe Thunderstorm Warning	DMX	Adams	30 min
May 16, 5:09 PM CDT	Severe Thunderstorm Warning Considerable damage threat	OAX	Montgomery	51 min
May 16, 5:14 PM CDT	Severe Thunderstorm Warning	DMX	Adams, Taylor	31 min
May 16, 5:24 PM CDT	Severe Thunderstorm Warning	DMX	Adams, Taylor	21 min
May 16, 5:24 PM CDT	Severe Thunderstorm Warning	OAX	Montgomery, Pottawattamie	51 min
May 16, 5:34 PM CDT	Severe Thunderstorm Warning	DMX	Adair, Adams, Cass	41 min
May 16, 5:37 PM CDT	Severe Thunderstorm Warning Considerable damage threat	DMX	Taylor	38 min
May 16, 6:02 PM CDT	Severe Thunderstorm Warning Considerable damage threat	DMX	Adams, Taylor	43 min
May 16, 6:04 PM CDT	Severe Thunderstorm Warning Considerable damage threat	DMX	Ringgold, Taylor	41 min
May 16, 6:12 PM CDT	Severe Thunderstorm Warning	OAX	Montgomery, Page	30 min
May 16, 6:34 PM CDT	Severe Thunderstorm Warning	DMX	Adams, Taylor	26 min
May 16, 6:46 PM CDT	Severe Thunderstorm Warning Considerable damage threat	DMX	Decatur, Ringgold	59 min
May 16, 6:52 PM CDT	Severe Thunderstorm Warning	DMX	Ringgold, Taylor	23 min
May 16, 7:20 PM CDT	Severe Thunderstorm Warning	DMX	Ringgold, Taylor	25 min
May 16, 7:35 PM CDT	Severe Thunderstorm Warning	DMX	Decatur, Ringgold	36 min
May 16, 7:41 PM CDT	Severe Thunderstorm Warning	OAX	Fremont	34 min
May 16, 9:07 PM CDT	Severe Thunderstorm Warning	DMX	Bremer	38 min
May 16, 11:14 PM CDT	Severe Thunderstorm Warning	FSD	Clay, O'Brien	16 min
May 17, 4:18 PM CDT	Severe Thunderstorm Warning Considerable damage threat	FSD	Lyon	42 min
May 17, 4:56 PM CDT	Severe Thunderstorm Warning Considerable damage threat	FSD	Lyon	49 min
May 17, 5:43 PM CDT	Severe Thunderstorm Warning Considerable damage threat	FSD	Lyon, Osceola	62 min
May 17, 5:56 PM CDT	Severe Thunderstorm Warning	FSD	Lyon, O'Brien, Osceola, Sioux	27 min
May 17, 6:30 PM CDT	Severe Thunderstorm Warning Considerable damage threat	FSD	Dickinson, Osceola	75 min
May 17, 6:33 PM CDT	Severe Thunderstorm Warning	FSD	Plymouth, Sioux	57 min
May 17, 7:20 PM CDT	Severe Thunderstorm Warning	FSD	Plymouth, Sioux	28 min
May 17, 7:20 PM CDT	Severe Thunderstorm Warning	FSD	O'Brien, Osceola	26 min
May 17, 7:27 PM CDT	Severe Thunderstorm Warning Considerable damage threat	OAX	Harrison, Monona	48 min
May 17, 7:32 PM CDT	Severe Thunderstorm Warning Considerable damage threat	FSD	Cherokee, Ida, Plymouth, Woodbury	58 min
May 17, 8:00 PM CDT	Severe Thunderstorm Warning	FSD	O'Brien, Osceola, Plymouth, Sioux	45 min
May 17, 8:00 PM CDT	Severe Thunderstorm Warning	OAX	Harrison, Monona	45 min
May 17, 8:11 PM CDT	Severe Thunderstorm Warning Considerable damage threat	OAX	Harrison, Mills, Pottawattamie, Shelby	64 min
May 17, 8:19 PM CDT	Severe Thunderstorm Warning Considerable damage threat	DMX	Calhoun, Palo Alto, Pocahontas, Sac	56 min
May 17, 8:21 PM CDT	Severe Thunderstorm Warning Destructive damage threat	FSD	Buena Vista, Cherokee, Clay, Dickinson, Ida, O'Brien and 3 more	54 min
May 17, 8:25 PM CDT	Severe Thunderstorm Warning Considerable damage threat	OAX	Harrison, Shelby	65 min
May 17, 8:29 PM CDT	Severe Thunderstorm Warning	OAX	Fremont	46 min
May 17, 8:34 PM CDT	Severe Thunderstorm Warning	DMX	Calhoun, Carroll, Crawford, Greene, Sac	56 min
May 17, 8:42 PM CDT	Severe Thunderstorm Warning Considerable damage threat	OAX	Harrison, Monona	33 min
May 17, 8:56 PM CDT	Severe Thunderstorm Warning Considerable damage threat	OAX	Harrison, Monona, Pottawattamie, Shelby	64 min
May 17, 9:02 PM CDT	Severe Thunderstorm Warning Considerable damage threat	DMX	Calhoun, Hamilton, Humboldt, Kossuth, Palo Alto, Pocahontas and 2 more	43 min
May 17, 9:03 PM CDT	Severe Thunderstorm Warning Considerable damage threat	OAX	Fremont, Mills, Montgomery, Page	72 min
May 17, 9:26 PM CDT	Severe Thunderstorm Warning	DMX	Audubon, Boone, Calhoun, Carroll, Crawford, Dallas and 5 more	79 min
May 17, 9:28 PM CDT	Severe Thunderstorm Warning Considerable damage threat	DMX	Cerro Gordo, Emmet, Franklin, Hancock, Humboldt, Kossuth and 4 more	62 min
May 17, 9:31 PM CDT	Severe Thunderstorm Warning	DMX	Adair, Adams, Cass	59 min
May 17, 9:42 PM CDT	Severe Thunderstorm Warning	DMX	Calhoun, Franklin, Hamilton, Hardin, Humboldt, Webster and 1 more	63 min
May 17, 10:00 PM CDT	Severe Thunderstorm Warning	OAX	Fremont	30 min
May 17, 10:06 PM CDT	Severe Thunderstorm Warning	OAX	Fremont, Mills, Montgomery, Page	54 min
May 17, 10:09 PM CDT	Severe Thunderstorm Warning	ARX	Floyd, Mitchell	66 min
May 17, 10:11 PM CDT	Severe Thunderstorm Warning	DMX	Butler, Cerro Gordo, Franklin, Hancock, Wright	37 min
May 17, 10:23 PM CDT	Severe Thunderstorm Warning	DMX	Adair, Dallas, Guthrie, Madison, Polk, Warren	24 min
May 17, 10:49 PM CDT	Severe Thunderstorm Warning	ARX	Chickasaw, Howard	56 min
May 17, 11:40 PM CDT	Severe Thunderstorm Warning	ARX	Winneshiek	28 min
May 18, 3:47 AM CDT	Severe Thunderstorm Warning	DVN	Clinton, Scott	32 min
May 18, 4:02 PM CDT	Severe Thunderstorm Warning Considerable damage threat	OAX	Fremont	43 min
May 18, 4:39 PM CDT	Severe Thunderstorm Warning Considerable damage threat	OAX	Fremont, Page	66 min
May 18, 4:58 PM CDT	Severe Thunderstorm Warning	OAX	Monona	21 min
May 18, 5:11 PM CDT	Severe Thunderstorm Warning	FSD	Cherokee, Ida, Plymouth, Woodbury	49 min
May 18, 5:13 PM CDT	Severe Thunderstorm Warning	OAX	Page	62 min
May 18, 5:34 PM CDT	Severe Thunderstorm Warning	DMX	Adams, Taylor	56 min
May 18, 5:48 PM CDT	Severe Thunderstorm Warning Considerable damage threat	FSD	Buena Vista, Cherokee, Clay, O'Brien	42 min
May 18, 6:08 PM CDT	Severe Thunderstorm Warning	FSD	Plymouth, Sioux	37 min
May 18, 6:18 PM CDT	Severe Thunderstorm Warning	OAX	Fremont, Mills	31 min
May 18, 6:22 PM CDT	Severe Thunderstorm Warning	DMX	Ringgold, Taylor, Union	53 min
May 18, 6:37 PM CDT	Severe Thunderstorm Warning	OAX	Mills, Montgomery, Pottawattamie	14 min
May 18, 7:18 PM CDT	Severe Thunderstorm Warning	OAX	Page	32 min
May 18, 7:29 PM CDT	Severe Thunderstorm Warning	OAX	Harrison, Shelby	26 min
May 18, 7:41 PM CDT	Severe Thunderstorm Warning	DMX	Jasper, Polk, Warren	49 min
May 18, 8:08 PM CDT	Severe Thunderstorm Warning	DMX	Jasper, Marshall, Polk, Story	52 min
May 24, 10:42 PM CDT	Severe Thunderstorm Warning	FSD	Lyon	48 min
May 24, 11:29 PM CDT	Severe Thunderstorm Warning	FSD	Lyon	46 min
May 25, 1:12 AM CDT	Severe Thunderstorm Warning	FSD	Lyon, O'Brien, Osceola, Sioux	48 min
May 26, 12:41 AM CDT	Severe Thunderstorm Warning	DMX	Emmet	16 min

By county

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

39 more counties

Nearby

Alerts in force now Tornadoes on record The radar archive 2025

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.