Alert archive / Iowa / Severe Thunderstorm Warnings in 2025
Severe Thunderstorm Warning 100, NWS Des Moines, IA
NWS Des Moines, IA issued this severe thunderstorm warning at Jun 11, 2025, 7:25 PM CDT for 4 counties in Iowa. It was in force for 65 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
- Jun 11, 2025, 7:25 PM CDT (00:25 UTC)
- Expired
- Jun 11, 2025, 8:30 PM CDT
- In force
- 65 min
- Issued by
- NWS Des Moines, IA
- Area
- Storm-based polygon
- Hail
- 0.75 in
- Wind
- 60.0 mph
Counties Black Hawk County, IA, Grundy County, IA, Marshall County, IA, Tama County, IA
The radar
The Des Moines radar (KDMX), 105 km from the middle of the area, began a volume at 00:24 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 |
|---|---|---|---|
| Jun 11, 2:53 PM CDT | Severe Thunderstorm Watch | SPC | 7 hr |
The nearest sounding before it
Davenport, (KDVN), launched 00:00Z, 0.4 hours before the alert went out and 192 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
- 105 J/kg
- Mixed-layer CIN
- -205 J/kg
- Mixed-layer LCL
- 2395 m above ground
- 0-6 km bulk shear
- 27 kt
- 0-1 km storm-relative helicity
- 28 m²/s²
- 0-3 km storm-relative helicity
- 45 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
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 Jun 11, 6:45 PM CDT, 40 minutes earlier.
Area forecast discussion, Jun 11, 6:45 PM CDT, 40 minutes before
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</html>Hazardous weather outlook, Jun 11, 7:49 AM CDT, 11 hours 36 minutes before
Hazardous Weather Outlook National Weather Service Des Moines IA 749 AM CDT Wed Jun 11 2025 IAZ004>007-015>017-023>028-033>039-044>050-057>062-070>075- 081>086-092>097-121300- 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- 749 AM CDT Wed Jun 11 2025 This Hazardous Weather Outlook is for portions of central Iowa. .DAY ONE...Today and tonight Thunderstorms will develop late this afternoon and evening across northern Iowa, possibly reaching as far south as central Iowa. Some of the stronger storms will be capable of producing large hail and gusty winds. Heavy rainfall will also be possible, especially as rain and storms redevelop tonight over northern Iowa. .DAYS TWO THROUGH SEVEN...Thursday through Tuesday Additional thunderstorm chances are forecast at intervals from Thursday through Tuesday. Some stronger storms may produce gusty winds in western and northwestern Iowa late Thursday night. Any severe weather threats from Friday onward will be better assessed in the coming days. .SPOTTER INFORMATION STATEMENT... Spotter activation may be needed across the northern half of Iowa later today.
In the hours before
Local storm report, Jun 11, 5:44 PM CDT, 1 hour 41 minutes before
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</html>Local storm report, Jun 11, 6:00 PM CDT, 1 hour 25 minutes before
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</html>Local storm report, Jun 11, 6:10 PM CDT, 1 hour 15 minutes before
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</html>Local storm report, Jun 11, 6:30 PM CDT, 55 minutes before
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</html>Local storm report, Jun 11, 6:33 PM CDT, 52 minutes before
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</html>Local storm report, Jun 11, 6:35 PM CDT, 50 minutes before
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</html>The office that day
Everything else NWS Des Moines, IA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 11, 11:26 PM CDT | Special Weather Statement | DMX | Bremer | 49 min |
| Jun 11, 11:52 PM CDT | Special Weather Statement | DMX | Black Hawk | 23 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.