Alert archive / Iowa / Severe Thunderstorm Warnings in 2025
Severe Thunderstorm Warning 253, NWS Des Moines, IA
NWS Des Moines, IA issued this severe thunderstorm warning at Sep 22, 2025, 9:05 PM CDT for 4 counties in Iowa. It was in force for 40 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
- Sep 22, 2025, 9:05 PM CDT (02:05 UTC)
- Expired
- Sep 22, 2025, 9:45 PM CDT
- In force
- 40 min
- Issued by
- NWS Des Moines, IA
- Area
- Storm-based polygon
- Hail
- 1.0 in
- Wind
- 60.0 mph
Counties Boone County, IA, Hamilton County, IA, Story County, IA, Webster County, IA
The radar
The Des Moines radar (KDMX), 55 km from the middle of the area, began a volume at 02:06 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 nearest sounding before it
Omaha, NE (KOAX), launched 00:00Z, 2.1 hours before the alert went out and 234 km from the middle of its area. This is the routine balloon launch nearest before it, the air the forecaster had in hand, not a measurement taken for the alert.
- Mixed-layer CAPE
- 2545 J/kg
- Mixed-layer CIN
- -9 J/kg
- Mixed-layer LCL
- 1653 m above ground
- 0-6 km bulk shear
- 35 kt
- 0-1 km storm-relative helicity
- 71 m²/s²
- 0-3 km storm-relative helicity
- 127 m²/s²
- Significant tornado parameter
- 0.4
- Supercell composite
- 6.5
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 Sep 22, 6:44 PM CDT, 2 hours 21 minutes earlier.
Area forecast discussion, Sep 22, 6:44 PM CDT, 2 hours 21 minutes before
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</html>Hazardous weather outlook, Sep 22, 5:15 PM CDT, 3 hours 50 minutes before
Hazardous Weather Outlook National Weather Service Des Moines IA 515 PM CDT Mon Sep 22 2025 IAZ004>007-015>017-023>028-033>039-044>050-057>062-070>075- 081>086-092>097-232215- 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- 515 PM CDT Mon Sep 22 2025 This Hazardous Weather Outlook is for portions of central Iowa. .DAY ONE...Tonight A few strong to severe storms are possible this evening though 3 am. The greatest chances for severe storms is over parts of west central and into north central Iowa. Large hail up to half dollar sized and damaging wind gusts of 60 mph or greater are the primary threats. .DAYS TWO THROUGH SEVEN...Tuesday through Sunday Thunderstorms will remain in the forecast over the southern half of Iowa Tuesday and Tuesday night. At this time, the threat for any severe weather looks low. .SPOTTER INFORMATION STATEMENT... Spotter activation is possible this evening.
The office that day
Everything else NWS Des Moines, IA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Sep 22, 7:40 PM CDT | Severe Thunderstorm Warning | DMX | Black Hawk | 29 min |
| Sep 22, 7:55 PM CDT | Severe Thunderstorm Warning | DMX | Humboldt, Webster, Wright | 50 min |
| Sep 22, 7:59 PM CDT | Severe Thunderstorm Warning | DMX | Wright | 46 min |
| Sep 22, 8:22 PM CDT | Severe Thunderstorm Warning | DMX | Hamilton, Webster, Wright | 38 min |
| Sep 22, 8:35 PM CDT | Severe Thunderstorm Warning | DMX | Calhoun, Webster | 40 min |
| Sep 22, 9:02 PM CDT | Severe Thunderstorm Warning | DMX | Boone, Hamilton, Hardin, Marshall, Story | 43 min |
| Sep 22, 10:23 PM CDT | Severe Thunderstorm Warning | DMX | Boone, Greene | 52 min |
Nearby
Severe Thunderstorm Warnings in Iowa, 2025Every severe thunderstorm warning in 2025
Sources
The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.