Alert archive / Iowa / Severe Thunderstorm Warnings in 2026

Severe Thunderstorm Warning 150, NWS Des Moines, IA

May 15, 2026Black Hawk County, Bremer County, Butler County, Iowa

NWS Des Moines, IA issued this severe thunderstorm warning at May 15, 2026, 10:14 PM CDT for Black Hawk County, Bremer County, Butler County, Iowa. It was in force for 46 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 15, 2026, 10:14 PM CDT (03:14 UTC)
Expired: May 15, 2026, 11:00 PM CDT
In force: 46 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 03:17 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.

The watch it was issued in

The SPC watch in force over the same counties when this warning went out.

Issued	Product	Office	Lasted
May 15, 5:16 PM CDT	Severe Thunderstorm Watch	SPC	8 hr

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 15, 3:01 PM CDT, 7 hours 13 minutes earlier.

Area forecast discussion, May 15, 3:01 PM CDT, 7 hours 13 minutes before

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Hazardous weather outlook, May 15, 4:53 AM CDT, 17 hours 21 minutes before

Hazardous Weather Outlook
National Weather Service Des Moines IA
453 AM CDT Fri May 15 2026

IAZ004>007-015>017-023>028-033>039-044>050-057>062-070>075-
081>086-092>097-161000-
Emmet-Kossuth-Winnebago-Worth-Palo Alto-Hancock-Cerro Gordo-
Pocahontas-Humboldt-Wright-Franklin-Butler-Bremer-Sac-Calhoun-
Webster-Hamilton-Hardin-Grundy-Black Hawk-Crawford-Carroll-Greene-
Boone-Story-Marshall-Tama-Audubon-Guthrie-Dallas-Polk-Jasper-
Poweshiek-Cass-Adair-Madison-Warren-Marion-Mahaska-Adams-Union-
Clarke-Lucas-Monroe-Wapello-Taylor-Ringgold-Decatur-Wayne-
Appanoose-Davis-
453 AM CDT Fri May 15 2026

This Hazardous Weather Outlook is for portions of central Iowa.

.DAY ONE...Today and tonight

There is an Enhanced Risk (level 3 of 5) for severe storms today.
All modes of severe storms are possible. Storms are expected to
develop in northern and western Iowa early this evening, moving
across central to eastern Iowa late overnight.

.DAYS TWO THROUGH SEVEN...Saturday through Thursday

An active weather pattern will be in place through at least
Monday, with chances for strong to severe thunderstorms at times
each day. However the details of timing, location, and hazard
types will be better determined in the coming days.

.SPOTTER INFORMATION STATEMENT...

Spotter activation is possible at times Friday through Monday.

Hagenhoff

In the hours before

Local storm report, May 15, 6:03 PM CDT, 4 hours 11 minutes before

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Local storm report, May 15, 6:05 PM CDT, 4 hours 9 minutes before

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Local storm report, May 15, 6:09 PM CDT, 4 hours 5 minutes before

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Local storm report, May 15, 6:28 PM CDT, 3 hours 46 minutes before

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Local storm report, May 15, 6:53 PM CDT, 3 hours 21 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 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, 7:23 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, 7:36 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, 8:14 PM CDT	Severe Thunderstorm Warning Considerable damage threat	DMX	Hancock, Kossuth, Winnebago	41 min
May 15, 8:16 PM CDT	Severe Thunderstorm Warning Considerable damage threat	DMX	Hamilton, Humboldt, Webster, Wright	49 min
May 15, 8:53 PM CDT	Tornado Warning	DMX	Cerro Gordo	18 min
May 15, 9:19 PM CDT	Severe Thunderstorm Warning	DMX	Pocahontas	26 min
May 15, 10:07 PM CDT	Severe Thunderstorm Warning	DMX	Butler, Franklin, Grundy, Hardin	22 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, 4:48 PM CDT	Severe Thunderstorm Warning	DMX	Taylor	27 min
May 16, 5:00 PM CDT	Severe Thunderstorm Warning	DMX	Adams	30 min
May 16, 5:14 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, 5:34 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, 5:52 PM CDT	Tornado Warning	DMX	Taylor	13 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	Tornado Warning	DMX	Ringgold, Taylor	48 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

Nearby

Severe Thunderstorm Warnings in Iowa, 2026 Every severe thunderstorm warning in 2026

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.