Alert archive / Iowa / Severe Thunderstorm Warnings / 2021

Severe Thunderstorm Warnings in Iowa, December 2021

37 severe thunderstorm warnings in December 2021. 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 December 2021. Tap one for its archive.

Severe Thunderstorm Warnings: 37
Busiest day: December 16, 202121 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
Dec 15, 3:23 PM CST	Severe Thunderstorm Warning Considerable damage threat	FSD	Plymouth, Woodbury	67 min
Dec 15, 3:35 PM CST	Severe Thunderstorm Warning Destructive damage threat	OAX	Fremont, Harrison, Mills, Pottawattamie	70 min
Dec 15, 3:41 PM CST	Severe Thunderstorm Warning Destructive damage threat	OAX	Harrison, Monona	64 min
Dec 15, 3:55 PM CST	Severe Thunderstorm Warning Destructive damage threat	OAX	Fremont, Harrison, Mills, Montgomery, Page, Pottawattamie and 1 more	80 min
Dec 15, 4:05 PM CST	Severe Thunderstorm Warning Considerable damage threat	FSD	Buena Vista, Cherokee, Ida, Plymouth, Woodbury	55 min
Dec 15, 4:13 PM CST	Severe Thunderstorm Warning Destructive damage threat	DMX	Adair, Adams, Audubon, Cass, Guthrie, Ringgold and 2 more	77 min
Dec 15, 4:16 PM CST	Severe Thunderstorm Warning Destructive damage threat	DMX	Carroll, Crawford, Sac	74 min
Dec 15, 4:26 PM CST	Severe Thunderstorm Warning Considerable damage threat	FSD	Plymouth, Woodbury	34 min
Dec 15, 4:51 PM CST	Severe Thunderstorm Warning Considerable damage threat	FSD	O'Brien, Sioux	39 min
Dec 15, 4:56 PM CST	Severe Thunderstorm Warning Destructive damage threat	FSD	Buena Vista, Cherokee, Clay, Ida	46 min
Dec 15, 5:10 PM CST	Severe Thunderstorm Warning Destructive damage threat	DMX	Adair, Audubon, Boone, Dallas, Greene, Guthrie and 4 more	80 min
Dec 15, 5:19 PM CST	Severe Thunderstorm Warning Destructive damage threat	DMX	Boone, Calhoun, Carroll, Emmet, Greene, Humboldt and 5 more	71 min
Dec 15, 5:22 PM CST	Severe Thunderstorm Warning Destructive damage threat	DMX	Carroll, Crawford, Sac	23 min
Dec 15, 5:22 PM CST	Severe Thunderstorm Warning Considerable damage threat	DMX	Adair, Adams, Clarke, Decatur, Madison, Ringgold and 3 more	68 min
Dec 15, 5:29 PM CST	Severe Thunderstorm Warning Considerable damage threat	FSD	Dickinson	46 min
Dec 15, 5:52 PM CST	Severe Thunderstorm Warning Destructive damage threat	DMX	Boone, Franklin, Hamilton, Hancock, Hardin, Humboldt and 6 more	53 min
Dec 15, 6:13 PM CST	Severe Thunderstorm Warning	DMX	Appanoose, Clarke, Decatur, Lucas, Marion, Monroe and 2 more	62 min
Dec 15, 6:24 PM CST	Severe Thunderstorm Warning Considerable damage threat	DMX	Clarke, Dallas, Jasper, Lucas, Madison, Mahaska and 5 more	66 min
Dec 15, 6:30 PM CST	Severe Thunderstorm Warning Considerable damage threat	DMX	Black Hawk, Bremer, Butler, Cerro Gordo, Franklin, Grundy and 6 more	75 min
Dec 15, 6:37 PM CST	Severe Thunderstorm Warning Considerable damage threat	ARX	Chickasaw, Floyd, Howard, Mitchell	68 min
Dec 15, 6:47 PM CST	Severe Thunderstorm Warning Considerable damage threat	DMX	Grundy, Hardin, Marshall, Story	43 min
Dec 15, 7:09 PM CST	Severe Thunderstorm Warning Considerable damage threat	DMX	Appanoose, Davis, Jasper, Lucas, Mahaska, Marion and 5 more	66 min
Dec 15, 7:17 PM CST	Severe Thunderstorm Warning Destructive damage threat	DVN	Benton, Iowa	58 min
Dec 15, 7:29 PM CST	Severe Thunderstorm Warning Considerable damage threat	ARX	Allamakee, Clayton, Fayette, Winneshiek	61 min
Dec 15, 7:31 PM CST	Severe Thunderstorm Warning Considerable damage threat	DVN	Jefferson, Keokuk, Van Buren	59 min
Dec 15, 7:33 PM CST	Severe Thunderstorm Warning Considerable damage threat	DVN	Buchanan	57 min
Dec 15, 7:44 PM CST	Severe Thunderstorm Warning Considerable damage threat	DMX	Black Hawk, Bremer, Butler, Grundy, Tama	27 min
Dec 15, 8:08 PM CST	Severe Thunderstorm Warning Considerable damage threat	DVN	Buchanan, Delaware, Johnson, Linn, Louisa, Washington	67 min
Dec 15, 8:16 PM CST	Severe Thunderstorm Warning Considerable damage threat	ARX	Allamakee, Clayton	74 min
Dec 15, 8:18 PM CST	Severe Thunderstorm Warning Considerable damage threat	DVN	Henry, Jefferson, Lee, Van Buren	57 min
Dec 15, 8:23 PM CST	Severe Thunderstorm Warning Considerable damage threat	DVN	Benton, Iowa	37 min
Dec 15, 8:29 PM CST	Severe Thunderstorm Warning Considerable damage threat	ARX	Allamakee, Clayton	31 min
Dec 15, 8:34 PM CST	Severe Thunderstorm Warning Considerable damage threat	DVN	Jefferson, Keokuk, Van Buren	26 min
Dec 15, 8:44 PM CST	Severe Thunderstorm Warning Considerable damage threat	DVN	Delaware, Dubuque, Jones	61 min
Dec 15, 8:50 PM CST	Severe Thunderstorm Warning Considerable damage threat	DVN	Cedar, Louisa, Muscatine	55 min
Dec 15, 8:53 PM CST	Severe Thunderstorm Warning Considerable damage threat	DVN	Des Moines, Lee	67 min
Dec 15, 9:12 PM CST	Severe Thunderstorm Warning Considerable damage threat	DVN	Clinton, Dubuque, Jackson, Scott	63 min

By county

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

57 more counties

Nearby

Alerts in force now Tornadoes on record The radar archive 2020 2022

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. Rebuilt daily.