Alert archive / Iowa / Severe Thunderstorm Warnings in 2025
Severe Thunderstorm Warning 199, NWS Des Moines, IA
NWS Des Moines, IA issued this severe thunderstorm warning at Aug 9, 2025, 6:47 AM CDT for Carroll County, Crawford County, Iowa. It was in force for 58 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 9, 2025, 6:47 AM CDT (11:47 UTC)
- Expired
- Aug 9, 2025, 7:45 AM CDT
- In force
- 58 min
- Issued by
- NWS Des Moines, IA
- Area
- Storm-based polygon
- Damage threat
- Destructive
- Hail
- 1.0 in
- Wind
- 80.0 mph
Counties Carroll County, IA, Crawford County, IA
The radar
The Des Moines radar (KDMX), 121 km from the middle of the area, began a volume at 11:49 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 9, 6:04 AM CDT | Severe Thunderstorm Watch | SPC | 5 hr |
The nearest sounding before it
Omaha, NE (KOAX), launched 00:00Z, 11.8 hours before the alert went out and 131 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
- 4205 J/kg
- Mixed-layer CIN
- -214 J/kg
- Mixed-layer LCL
- 1448 m above ground
- 0-6 km bulk shear
- 23 kt
- 0-1 km storm-relative helicity
- 87 m²/s²
- 0-3 km storm-relative helicity
- 94 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 4.6
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 9, 3:48 AM CDT, 2 hours 59 minutes earlier.
Area forecast discussion, Aug 9, 3:48 AM CDT, 2 hours 59 minutes before
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</html>Hazardous weather outlook, Aug 9, 4:47 AM CDT, 2 hours before
Hazardous Weather Outlook National Weather Service Des Moines IA 447 AM CDT Sat Aug 9 2025 IAZ004>007-015>017-023>027-033>036-044>046-057-058-070-071-081- 101000- Emmet-Kossuth-Winnebago-Worth-Palo Alto-Hancock-Cerro Gordo- Pocahontas-Humboldt-Wright-Franklin-Butler-Sac-Calhoun-Webster- Hamilton-Crawford-Carroll-Greene-Audubon-Guthrie-Cass-Adair-Adams- 447 AM CDT Sat Aug 9 2025 This Hazardous Weather Outlook is for portions of central Iowa. .DAY ONE...Today and tonight Thunderstorms are expected at times today through tonight with repeated rounds bringing a threat for heavy rain and potential flooding by late tonight. The main flood threat is across central into southern Iowa, however locally heavy rain and isolated flooding is certainly possible, especially in urban and poor drainage areas. A few strong to severe storms are also possible at times today with strong wind gusts the primary threat, but isolated large hail may be possible as well. .DAYS TWO THROUGH SEVEN...Sunday through Friday Additional thunderstorms are expected on Sunday into Monday with a continued heavy rain threat, especially for central to southern Iowa. .SPOTTER INFORMATION STATEMENT... Spotters may be needed today. Rainfall reports are also appreciated. IAZ028-037>039-047>050-059>062-072>075-082>086-092>097-101000- Bremer-Hardin-Grundy-Black Hawk-Boone-Story-Marshall-Tama-Dallas- Polk-Jasper-Poweshiek-Madison-Warren-Marion-Mahaska-Union-Clarke- Lucas-Monroe-Wapello-Taylor-Ringgold-Decatur-Wayne-Appanoose- Davis- 447 AM CDT Sat Aug 9 2025 This Hazardous Weather Outlook is for portions of central Iowa. .DAY ONE...Today and tonight Thunderstorms are expected at times today through tonight with repeated rounds bringing a threat for heavy rain and potential flooding by late tonight. A Flood Watch is in effect for the area starting this afternoon. Please refer to the National Weather Service website at weather.gov/desmoines for further details. Scattered strong to severe storms are also possible at times today into tonight with strong wind gusts the primary threat, but isolated large hail may be possible as well. .DAYS TWO THROUGH SEVEN...Sunday through Friday Additional thunderstorms are expected on Sunday into Monday with a continued heavy rain threat. A Flood Watch remains in effect for the area through Monday morning. Please refer to the National Weather Service website at weather.gov/desmoines for further details. .SPOTTER INFORMATION STATEMENT... Spotters may be needed today. Rainfall reports are also appreciated.
The office that day
Everything else NWS Des Moines, IA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 9, 6:10 AM CDT | Severe Thunderstorm Warning | DMX | Calhoun, Crawford, Sac | 50 min |
| Aug 9, 6:59 AM CDT | Severe Thunderstorm Warning | DMX | Calhoun, Sac | 46 min |
| Aug 9, 7:05 AM CDT | Severe Thunderstorm Warning | DMX | Audubon, Carroll, Crawford, Greene | 40 min |
| Aug 9, 7:10 AM CDT | Severe Thunderstorm Warning | DMX | Crawford, Sac | 50 min |
| Aug 9, 7:32 AM CDT | Severe Thunderstorm Warning | DMX | Calhoun, Webster | 43 min |
| Aug 9, 7:37 AM CDT | Severe Thunderstorm Warning | DMX | Audubon, Boone, Carroll, Greene, Guthrie | 38 min |
| Aug 9, 7:47 AM CDT | Severe Thunderstorm Warning | DMX | Carroll, Greene | 25 min |
| Aug 9, 7:58 AM CDT | Severe Thunderstorm Warning | DMX | Boone, Greene, Hamilton, Webster | 47 min |
| Aug 9, 8:10 AM CDT | Severe Thunderstorm Warning | DMX | Calhoun, Humboldt, Pocahontas, Webster, Wright | 50 min |
| Aug 9, 9:44 AM CDT | Special Weather Statement | DMX | Cerro Gordo, Worth | 31 min |
| Aug 9, 10:49 AM CDT | River Flood Watch | DMX | Davis, Wapello | 23 hr |
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.