Alert archive / Iowa / Severe Thunderstorm Warnings in 2026
Severe Thunderstorm Warning 323, NWS Des Moines, IA
NWS Des Moines, IA issued this severe thunderstorm warning at Aug 13, 2026, 7:11 AM CDT for 5 counties in 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 13, 2026, 7:11 AM CDT (12:11 UTC)
- Expired
- Aug 13, 2026, 8:00 AM CDT
- In force
- 49 min
- Issued by
- NWS Des Moines, IA
- Area
- Storm-based polygon
- Tornado
- Possible
- Hail
- 0.75 in
- Wind
- 60.0 mph
Counties Jasper County, IA, Marshall County, IA, Poweshiek County, IA, Story County, IA, Tama County, IA
The radar
The Des Moines radar (KDMX), 70 km from the middle of the area, began a volume at 12:11 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 |
|---|---|---|---|
| Aug 13, 5:47 AM CDT | Severe Thunderstorm Watch | SPC | 6 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 Aug 13, 6:52 AM CDT, 19 minutes earlier.
Area forecast discussion, Aug 13, 6:52 AM CDT, 19 minutes before
<!doctype html>
<html lang="en">
<head>
<meta charset="utf-8">
<meta name="viewport" content="width=device-width, initial-scale=1">
<title>Service Notice</title>
<link rel="stylesheet" href="index.css">
</head>
<body>
<main class="wrap">
<section class="card" role="status" aria-live="polite">
<div class="status" id="status">Temporary Notice</div>
<h1 id="headline">This service is currently unavailable.</h1>
<p id="message1">
The site you requested is temporarily down for maintenance or an unexpected outage.
</p>
<p id="message2">
Please try again in a few minutes.
</p>
<p class="small" id="detail">
If you are an administrator, restore upstream service and remove the redirect/fallback rule when normal operations resume.
</p>
</section>
</main>
<script src="index.js"></script>
</body>
</html>Hazardous weather outlook, Aug 12, 7:16 PM CDT, 11 hours 55 minutes before
Hazardous Weather Outlook National Weather Service Des Moines IA 716 PM CDT Wed Aug 12 2026 IAZ004>007-015>017-023>028-033>039-044>050-057>062-070>075- 081>086-092>097-131500- 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- 716 PM CDT Wed Aug 12 2026 This Hazardous Weather Outlook is for portions of central Iowa. .DAY ONE...Tonight Thunderstorms are likely in parts of IOwa late tonight into Thursday morning. Some storms may be severe, with damaging wind gusts and locally heavy rainfall. .DAYS TWO THROUGH SEVEN...Thursday through Tuesday Additional chances for thunderstorms continue through the end of this week. Severe weather and excessive rainfall are possible at times through at least Friday. Warm and humid conditions are expected to continue into late this week over southern Iowa, where heat index values may near 100 degrees at times. .SPOTTER INFORMATION STATEMENT... Spotter activation may be needed at times over the next few days. Severe weather and rainfall reports are also appreciated.
In the hours before
Local storm report, Aug 13, 5:25 AM CDT, 1 hour 46 minutes before
Preliminary Local Storm Report
National Weather Service Des Moines IA
525 AM CDT Thu Aug 13 2026
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0519 AM Tstm Wnd Gst 7 SW Gray 41.77N 95.08W
08/13/2026 M66 MPH Audubon IA Mesonet
Measured from personal weather station.
&&
67Local storm report, Aug 13, 5:33 AM CDT, 1 hour 38 minutes before
Preliminary Local Storm Report
National Weather Service Des Moines IA
533 AM CDT Thu Aug 13 2026
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0529 AM Tstm Wnd Gst 1 NW Audubon 41.73N 94.94W
08/13/2026 M64 MPH Audubon IA Mesonet
Measured from personal weather station.
&&
67Local storm report, Aug 13, 6:49 AM CDT, 22 minutes before
<!doctype html>
<html lang="en">
<head>
<meta charset="utf-8">
<meta name="viewport" content="width=device-width, initial-scale=1">
<title>Service Notice</title>
<link rel="stylesheet" href="index.css">
</head>
<body>
<main class="wrap">
<section class="card" role="status" aria-live="polite">
<div class="status" id="status">Temporary Notice</div>
<h1 id="headline">This service is currently unavailable.</h1>
<p id="message1">
The site you requested is temporarily down for maintenance or an unexpected outage.
</p>
<p id="message2">
Please try again in a few minutes.
</p>
<p class="small" id="detail">
If you are an administrator, restore upstream service and remove the redirect/fallback rule when normal operations resume.
</p>
</section>
</main>
<script src="index.js"></script>
</body>
</html>Local storm report, Aug 13, 6:58 AM CDT, 13 minutes before
<!doctype html>
<html lang="en">
<head>
<meta charset="utf-8">
<meta name="viewport" content="width=device-width, initial-scale=1">
<title>Service Notice</title>
<link rel="stylesheet" href="index.css">
</head>
<body>
<main class="wrap">
<section class="card" role="status" aria-live="polite">
<div class="status" id="status">Temporary Notice</div>
<h1 id="headline">This service is currently unavailable.</h1>
<p id="message1">
The site you requested is temporarily down for maintenance or an unexpected outage.
</p>
<p id="message2">
Please try again in a few minutes.
</p>
<p class="small" id="detail">
If you are an administrator, restore upstream service and remove the redirect/fallback rule when normal operations resume.
</p>
</section>
</main>
<script src="index.js"></script>
</body>
</html>The office that day
Everything else NWS Des Moines, IA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 13, 2:53 AM CDT | Flood Watch | DMX | Adair, Adams, Appanoose, Audubon, Black Hawk, Boone and 38 more | 55 hr |
| Aug 13, 4:29 AM CDT | Severe Thunderstorm Warning | DMX | Crawford | 46 min |
| Aug 13, 4:44 AM CDT | Tornado Warning | DMX | Carroll, Crawford | 31 min |
| Aug 13, 5:09 AM CDT | Severe Thunderstorm Warning | DMX | Audubon, Carroll, Crawford, Greene, Guthrie | 51 min |
| Aug 13, 5:30 AM CDT | Tornado Warning | DMX | Carroll | 30 min |
| Aug 13, 5:46 AM CDT | Tornado Warning | DMX | Greene | 29 min |
| Aug 13, 5:51 AM CDT | Severe Thunderstorm Warning | DMX | Boone, Carroll, Dallas, Greene, Guthrie, Polk | 39 min |
| Aug 13, 6:27 AM CDT | Severe Thunderstorm Warning | DMX | Boone, Dallas, Jasper, Marshall, Polk, Story | 48 min |
| Aug 13, 6:44 AM CDT | Tornado Warning | DMX | Marshall, Story | 20 min |
| Aug 13, 6:48 AM CDT | Tornado Warning | DMX | Jasper, Marshall, Polk, Story | 27 min |
| Aug 13, 8:48 AM CDT | Severe Thunderstorm Warning | DMX | Mahaska, Wapello | 42 min |
Nearby
Severe Thunderstorm Warnings in Iowa, 2026Every 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.