Alert archive / Iowa / Severe Thunderstorm Warnings in 2026

Severe Thunderstorm Warning 302, NWS Des Moines, IA

August 5, 2026Decatur County, Wayne County, Iowa

NWS Des Moines, IA issued this severe thunderstorm warning at Aug 5, 2026, 5:41 AM CDT for Decatur County, Wayne 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: Aug 5, 2026, 5:41 AM CDT (10:41 UTC)
Expired: Aug 5, 2026, 6:30 AM CDT
In force: 49 min
Issued by: NWS Des Moines, IA
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

Counties Decatur County, IA, Wayne County, IA

The radar

The Des Moines radar (KDMX), 111 km from the middle of the area, began a volume at 10:42 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 Aug 5, 2:26 AM CDT, 3 hours 15 minutes earlier.

Area forecast discussion, Aug 5, 2:26 AM CDT, 3 hours 15 minutes before

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Hazardous weather outlook, Aug 5, 3:10 AM CDT, 2 hours 31 minutes before

Hazardous Weather Outlook
National Weather Service Des Moines IA
310 AM CDT Wed Aug 5 2026

IAZ004>007-015>017-023>028-033>039-044>050-057>062-070>075-
081>085-092>095-060815-
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-Taylor-Ringgold-Decatur-Wayne-
310 AM CDT Wed Aug 5 2026

This Hazardous Weather Outlook is for portions of central Iowa.

.DAY ONE...Today and tonight

Rounds of rain and thunderstorms will be most widespread over
southern into portions of central Iowa today. The main concern is
locally heavy rainfall with isolated flash flooding possible.

.DAYS TWO THROUGH SEVEN...Thursday through Tuesday

Storm chances return at times Friday into early next week. Any
severe or hydrologic concerns will be better assessed in the coming
days.

.SPOTTER INFORMATION STATEMENT...

Spotter activation will not be needed, but reports of rainfall are
appreciated.

IAZ086-096-097-060815-
Wapello-Appanoose-Davis-
310 AM CDT Wed Aug 5 2026

This Hazardous Weather Outlook is for portions of central Iowa.

.DAY ONE...Today and tonight

A Flood Watch for flash flooding is in effect for the area.
Please refer to the National Weather Service website at
weather.gov/desmoines for further details.

.DAYS TWO THROUGH SEVEN...Thursday through Tuesday

Storm chances return at times Friday into early next week. Any
severe or hydrologic concerns will be better assessed in the coming
days.

.SPOTTER INFORMATION STATEMENT...

Spotter activation will not be needed, but reports of rainfall are
appreciated.

Ansorge

In the hours before

Local storm report, Aug 5, 4:21 AM CDT, 1 hour 20 minutes before

Preliminary Local Storm Report
National Weather Service Des Moines IA
421 AM CDT Wed Aug 5 2026

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

0408 AM     Tstm Wnd Gst     2 SSW Lenox             40.86N 94.57W
08/05/2026  M63 MPH          Taylor             IA   Public

            Wind gusts measured via personal weather
            station.

&&

TDR

The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 5, 12:07 AM CDT	Severe Thunderstorm Warning	DMX	Adair, Adams, Cass	38 min
Aug 5, 2:14 AM CDT	Flood Watch	DMX	Appanoose, Davis, Wapello	14 hr
Aug 5, 3:43 AM CDT	Severe Thunderstorm Warning	DMX	Adams, Taylor	47 min
Aug 5, 6:13 AM CDT	Severe Thunderstorm Warning	DMX	Appanoose, Wayne	47 min
Aug 5, 7:12 AM CDT	Flash Flood Warning	DMX	Clarke, Decatur, Lucas, Wayne	6 hr
Aug 5, 9:02 AM CDT	River Flood Watch	DMX	Decatur	25 hr

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.