Alert archive / Iowa / Severe Thunderstorm Warnings in 2024

Severe Thunderstorm Warning 88, NWS Des Moines, IA

May 21, 2024Black Hawk County, Bremer County, Butler County, Iowa

NWS Des Moines, IA issued this severe thunderstorm warning at May 21, 2024, 2:56 AM CDT for Black Hawk County, Bremer County, Butler County, Iowa. It was in force for 49 min. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued: May 21, 2024, 2:56 AM CDT (07:56 UTC)
Expired: May 21, 2024, 3:45 AM CDT
In force: 49 min
Issued by: NWS Des Moines, IA
Area: Storm-based polygon
Hail: 0.75 in
Wind: 60.0 mph

Counties Black Hawk County, IA, Bremer County, IA, Butler County, IA

The radar

The Des Moines radar (KDMX), 146 km from the middle of the area, began a volume at 07:55 UTC, the scan nearest the moment this went out.

Open the radar archive at this moment

The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.

What forecasters said that day

The local office's own words before this severe thunderstorm warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS Des Moines, IA wrote its last area forecast discussion before this severe thunderstorm warning went out at May 21, 12:14 AM CDT, 2 hours 42 minutes earlier.

Area forecast discussion, May 21, 12:14 AM CDT, 2 hours 42 minutes before

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Hazardous weather outlook, May 20, 3:39 PM CDT, 11 hours 17 minutes before

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In the hours before

Special weather statement, May 21, 1:30 AM CDT, 1 hour 26 minutes before

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Local storm report, May 21, 1:49 AM CDT, 1 hour 7 minutes before

Preliminary Local Storm Report
National Weather Service Des Moines IA
149 AM CDT Tue May 21 2024

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0138 AM     Tstm Wnd Gst     1 NNW Audubon           41.73N 94.94W
05/21/2024  M64 MPH          Audubon            IA   Mesonet

            Personal weather station recorded a 64 mph
            wind gust in Audubon. Time given is station
            observation report time.

&&

AJ

Local storm report, May 21, 1:51 AM CDT, 1 hour 5 minutes before

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Special weather statement, May 21, 2:15 AM CDT, 41 minutes before

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Special weather statement, May 21, 2:32 AM CDT, 24 minutes before

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Local storm report, May 21, 2:56 AM CDT, 0 minutes before

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The office that day

Everything else NWS Des Moines, IA issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
May 20, 8:25 PM CDT	Severe Thunderstorm Warning Considerable damage threat	DMX	Palo Alto, Pocahontas	50 min
May 20, 8:48 PM CDT	Severe Thunderstorm Warning	DMX	Hancock, Kossuth, Winnebago	42 min
May 20, 9:12 PM CDT	River Flood Watch	DMX	Black Hawk	24 hr
May 20, 9:13 PM CDT	Severe Thunderstorm Warning Considerable damage threat	DMX	Humboldt, Kossuth, Palo Alto, Pocahontas	37 min
May 20, 9:30 PM CDT	Severe Thunderstorm Warning	DMX	Hancock, Winnebago, Worth	22 min
May 20, 10:20 PM CDT	Special Weather Statement	DMX	Hancock	25 min
May 20, 10:35 PM CDT	Severe Thunderstorm Warning	DMX	Kossuth	25 min
May 20, 10:40 PM CDT	Special Weather Statement	DMX	Palo Alto, Pocahontas	35 min
May 20, 11:02 PM CDT	Severe Thunderstorm Warning	DMX	Palo Alto, Pocahontas	28 min
May 20, 11:16 PM CDT	Flash Flood Warning	DMX	Hancock, Kossuth, Winnebago	6 hr
May 20, 11:30 PM CDT	Special Weather Statement	DMX	Carroll	30 min
May 20, 11:34 PM CDT	Special Weather Statement	DMX	Guthrie	26 min
May 20, 11:58 PM CDT	Severe Thunderstorm Warning	DMX	Boone, Calhoun, Carroll, Dallas, Greene, Guthrie and 2 more	36 min
May 21, 12:06 AM CDT	Special Weather Statement	DMX	Pocahontas	24 min
May 21, 12:10 AM CDT	Special Weather Statement	DMX	Hancock	35 min
May 21, 1:09 AM CDT	Severe Thunderstorm Warning	DMX	Audubon, Carroll, Crawford	66 min
May 21, 1:20 AM CDT	Severe Thunderstorm Warning	DMX	Jasper, Polk	40 min
May 21, 2:15 AM CDT	Special Weather Statement	DMX	Audubon, Guthrie	60 min
May 21, 2:32 AM CDT	Special Weather Statement	DMX	Black Hawk, Tama	28 min
May 21, 2:38 AM CDT	Severe Thunderstorm Warning	DMX	Black Hawk, Butler, Grundy, Hardin	37 min
May 21, 3:09 AM CDT	Flash Flood Warning	DMX	Butler, Franklin, Grundy, Hardin, Wright	8 hr
May 21, 3:22 AM CDT	Severe Thunderstorm Warning	DMX	Carroll, Crawford, Sac	38 min
May 21, 3:26 AM CDT	Flash Flood Warning	DMX	Adair, Audubon, Cass, Guthrie	8 hr
May 21, 4:12 AM CDT	Special Weather Statement	DMX	Polk	33 min
May 21, 4:22 AM CDT	Flash Flood Warning	DMX	Boone, Dallas, Greene, Guthrie, Jasper, Marshall and 2 more	7 hr
May 21, 5:09 AM CDT	Areal Flood Warning	DMX	Hancock, Kossuth, Winnebago	14 hr
May 21, 5:25 AM CDT	Severe Thunderstorm Warning	DMX	Poweshiek, Tama	50 min
May 21, 5:51 AM CDT	Severe Thunderstorm Warning	DMX	Jasper, Poweshiek, Tama	39 min
May 21, 6:18 AM CDT	Severe Thunderstorm Warning	DMX	Poweshiek, Tama	42 min
May 21, 6:26 AM CDT	Flash Flood Warning	DMX	Jasper, Marshall, Poweshiek, Tama	5 hr
May 21, 6:28 AM CDT	Severe Thunderstorm Warning Considerable damage threat	DMX	Carroll, Crawford, Sac	47 min
May 21, 6:51 AM CDT	Severe Thunderstorm Warning	DMX	Audubon, Carroll, Cass, Crawford, Guthrie	54 min
May 21, 7:07 AM CDT	Severe Thunderstorm Warning Considerable damage threat	DMX	Cass	23 min
May 21, 7:24 AM CDT	Tornado Warning	DMX	Adair, Cass	36 min
May 21, 7:29 AM CDT	Severe Thunderstorm Warning Considerable damage threat	DMX	Adair, Audubon, Cass, Guthrie	46 min
May 21, 7:35 AM CDT	Severe Thunderstorm Warning	DMX	Adair, Adams, Cass, Taylor	40 min
May 21, 8:05 AM CDT	Severe Thunderstorm Warning	DMX	Adair, Dallas, Guthrie, Madison	55 min
May 21, 8:41 AM CDT	Severe Thunderstorm Warning Considerable damage threat	DMX	Dallas, Madison, Polk, Warren	64 min
May 21, 8:57 AM CDT	Flash Flood Warning	DMX	Black Hawk, Bremer, Grundy, Hardin, Marshall, Tama	2 hr
May 21, 9:26 AM CDT	Severe Thunderstorm Warning	DMX	Jasper, Mahaska, Marion, Marshall, Polk, Poweshiek and 2 more	64 min
May 21, 10:09 AM CDT	River Flood Warning	DMX	Cass	15 hr
May 21, 11:14 AM CDT	River Flood Watch	DMX	Polk	4 days
May 21, 11:14 AM CDT	River Flood Watch	DMX	Webster	9 hr
May 21, 11:14 AM CDT	River Flood Watch	DMX	Polk	5 days
May 21, 11:14 AM CDT	River Flood Watch	DMX	Dallas, Greene	4 days
May 21, 11:14 AM CDT	River Flood Watch	DMX	Boone, Hamilton, Webster	47 hr
May 21, 11:14 AM CDT	River Flood Warning	DMX	Tama	8 days
May 21, 11:14 AM CDT	Severe Thunderstorm Warning	DMX	Jasper, Mahaska, Marion, Poweshiek	46 min
May 21, 11:16 AM CDT	Areal Flood Warning	DMX	Black Hawk, Bremer, Butler, Franklin, Grundy, Hardin and 6 more	24 hr
May 21, 11:54 AM CDT	Severe Thunderstorm Warning Considerable damage threat	DMX	Poweshiek	21 min
May 21, 1:38 PM CDT	Severe Thunderstorm Warning	DMX	Crawford	52 min
May 21, 2:18 PM CDT	Severe Thunderstorm Warning	DMX	Sac	29 min
May 21, 2:28 PM CDT	Severe Thunderstorm Warning	DMX	Adams, Audubon, Cass	62 min
May 21, 2:30 PM CDT	Severe Thunderstorm Warning	DMX	Audubon, Calhoun, Carroll, Crawford, Sac	45 min
May 21, 2:52 PM CDT	Tornado Warning	DMX	Adams, Cass	18 min
May 21, 2:55 PM CDT	Tornado Warning	DMX	Adair, Adams, Cass, Union	50 min
May 21, 2:57 PM CDT	Flash Flood Warning	DMX	Adair, Audubon, Carroll, Cass, Crawford, Greene and 1 more	6 hr
May 21, 3:07 PM CDT	Tornado Warning	DMX	Adair, Adams, Madison, Taylor, Union	53 min
May 21, 3:11 PM CDT	Severe Thunderstorm Warning Considerable damage threat	DMX	Audubon, Boone, Calhoun, Carroll, Greene, Guthrie and 1 more	49 min
May 21, 3:13 PM CDT	Tornado Warning	DMX	Audubon, Cass, Greene, Guthrie	22 min
May 21, 3:20 PM CDT	River Flood Warning	DMX	Polk	7 hr
May 21, 3:26 PM CDT	River Flood Warning	DMX	Polk	4 days
May 21, 3:26 PM CDT	River Flood Warning	DMX	Polk	4 days
May 21, 3:26 PM CDT	Tornado Warning Tornado observed	DMX	Adair, Adams, Madison, Union	49 min
May 21, 3:31 PM CDT	Severe Thunderstorm Warning Destructive damage threat	DMX	Boone, Greene, Hamilton, Webster, Wright	44 min
May 21, 3:33 PM CDT	Tornado Warning	DMX	Ringgold, Taylor, Union	42 min
May 21, 3:35 PM CDT	Tornado Warning Tornado observedConsiderable damage threat	DMX	Adair, Dallas, Guthrie, Madison	40 min
May 21, 3:40 PM CDT	Tornado Warning Tornado observed	DMX	Adair, Adams, Dallas, Madison, Ringgold, Union	50 min
May 21, 3:55 PM CDT	Tornado Warning	DMX	Clarke, Madison, Ringgold, Union, Warren	50 min
May 21, 3:58 PM CDT	Tornado Warning	DMX	Clarke, Decatur, Lucas, Ringgold, Union, Warren	47 min
May 21, 4:01 PM CDT	Severe Thunderstorm Warning	DMX	Boone, Greene, Guthrie, Hamilton, Webster	44 min
May 21, 4:03 PM CDT	Tornado Warning	DMX	Boone, Hamilton, Webster	42 min
May 21, 4:11 PM CDT	Severe Thunderstorm Warning	DMX	Boone, Clarke, Dallas, Decatur, Lucas, Madison and 4 more	64 min
May 21, 4:11 PM CDT	Severe Thunderstorm Warning	DMX	Hancock, Kossuth, Winnebago, Worth	49 min
May 21, 4:15 PM CDT	Severe Thunderstorm Warning	DMX	Cerro Gordo, Franklin, Hancock, Worth, Wright	45 min
May 21, 4:19 PM CDT	Tornado Warning	DMX	Boone, Dallas, Polk, Story	41 min
May 21, 4:25 PM CDT	Severe Thunderstorm Warning	DMX	Boone, Franklin, Grundy, Hamilton, Hardin, Marshall and 2 more	50 min
May 21, 4:30 PM CDT	Tornado Warning	DMX	Jasper, Madison, Polk, Warren	45 min
May 21, 4:43 PM CDT	Severe Thunderstorm Warning	DMX	Grundy, Hardin, Jasper, Marion, Marshall, Polk and 2 more	47 min
May 21, 4:46 PM CDT	Tornado Warning	DMX	Franklin, Grundy, Hamilton, Hardin	17 min

Nearby

Severe Thunderstorm Warnings in Iowa, 2024 Every severe thunderstorm warning in 2024

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; radar from the NEXRAD Level II archive.