Alert archive / Iowa / Severe Thunderstorm Warnings in 2023
Severe Thunderstorm Warning 65, NWS Des Moines, IA
NWS Des Moines, IA issued this severe thunderstorm warning at May 7, 2023, 2:56 PM 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
- May 7, 2023, 2:56 PM CDT (19:56 UTC)
- Expired
- May 7, 2023, 3:45 PM CDT
- In force
- 49 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, Hardin County, IA, Marshall County, IA, Story County, IA
The radar
The Des Moines radar (KDMX), 54 km from the middle of the area, began a volume at 19:57 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
Davenport, (KDVN), launched 12:00Z, 7.9 hours before the alert went out and 253 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
- 806 J/kg
- Mixed-layer CIN
- -127 J/kg
- Mixed-layer LCL
- 1023 m above ground
- 0-6 km bulk shear
- 44 kt
- 0-1 km storm-relative helicity
- 28 m²/s²
- 0-3 km storm-relative helicity
- 67 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 1.1
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 May 7, 12:46 PM CDT, 2 hours 10 minutes earlier.
Area forecast discussion, May 7, 12:46 PM CDT, 2 hours 10 minutes before
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</html>Hazardous weather outlook, May 7, 4:49 AM CDT, 10 hours 7 minutes before
Hazardous Weather Outlook National Weather Service Des Moines IA 449 AM CDT Sun May 7 2023 IAZ039-050-061-062-074-075-084>086-092>097-081000- Black Hawk-Tama-Jasper-Poweshiek-Marion-Mahaska-Lucas-Monroe- Wapello-Taylor-Ringgold-Decatur-Wayne-Appanoose-Davis- 449 AM CDT Sun May 7 2023 This Hazardous Weather Outlook is for portions of central Iowa. .DAY ONE...Today and tonight There is an enhanced threat of severe weather late Sunday through Sunday night. Large hail, damaging winds, and a few tornadoes may all be possible at times. .DAYS TWO THROUGH SEVEN...Monday through Saturday Additional thunderstorm chances are forecast on Monday and at intervals from Wednesday into next weekend, however, the overall threat of severe weather appears low at this time. .SPOTTER INFORMATION STATEMENT... Spotter activation may be needed late Sunday. IAZ004>007-015>017-023>028-033>038-044>049-057>060-070>073- 081>083-081000- Emmet-Kossuth-Winnebago-Worth-Palo Alto-Hancock-Cerro Gordo- Pocahontas-Humboldt-Wright-Franklin-Butler-Bremer-Sac-Calhoun- Webster-Hamilton-Hardin-Grundy-Crawford-Carroll-Greene-Boone- Story-Marshall-Audubon-Guthrie-Dallas-Polk-Cass-Adair-Madison- Warren-Adams-Union-Clarke- 449 AM CDT Sun May 7 2023 This Hazardous Weather Outlook is for portions of central Iowa. .DAY ONE...Today and tonight A Dense Fog Advisory is in effect for the area through mid morning. Refer to the National Weather Service Web site at weather.gov/desmoines for more details. There is an enhanced threat of severe weather late Sunday through Sunday night. Large hail, damaging winds, and a few tornadoes may all be possible at times. .DAYS TWO THROUGH SEVEN...Monday through Saturday Additional thunderstorm chances are forecast on Monday and at intervals from Wednesday into next weekend, however, the overall threat of severe weather appears low at this time. .SPOTTER INFORMATION STATEMENT... Spotter activation may be needed late Sunday.
In the hours before
Local storm report, May 7, 1:43 PM CDT, 1 hour 13 minutes before
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</html>Local storm report, May 7, 1:50 PM CDT, 1 hour 6 minutes before
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</html>Local storm report, May 7, 2:05 PM CDT, 51 minutes before
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</html>Local storm report, May 7, 2:10 PM CDT, 46 minutes before
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</html>Local storm report, May 7, 2:36 PM CDT, 20 minutes before
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</html>Local storm report, May 7, 2:45 PM CDT, 11 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 |
|---|---|---|---|---|
| May 6, 8:01 PM CDT | Special Weather Statement | DMX | Davis | 29 min |
| May 6, 8:33 PM CDT | Special Weather Statement | DMX | Davis | 12 min |
| May 6, 10:41 PM CDT | Dense Fog Advisory | DMX | Adair, Adams, Audubon, Black Hawk, Boone, Bremer and 36 more | 12 hr |
| May 7, 12:40 AM CDT | Severe Thunderstorm Warning | DMX | Davis | 50 min |
| May 7, 8:53 AM CDT | Special Weather Statement | DMX | Greene | 37 min |
| May 7, 10:04 AM CDT | Special Weather Statement | DMX | Story | 41 min |
| May 7, 12:45 PM CDT | Severe Thunderstorm Warning | DMX | Calhoun, Carroll, Crawford, Sac | 45 min |
| May 7, 1:24 PM CDT | Severe Thunderstorm Warning | DMX | Carroll, Greene | 51 min |
| May 7, 2:03 PM CDT | Severe Thunderstorm Warning | DMX | Boone, Greene, Webster | 26 min |
| May 7, 3:30 PM CDT | Severe Thunderstorm Warning | DMX | Jasper, Marshall, Story | 45 min |
| May 7, 3:40 PM CDT | Severe Thunderstorm Warning | DMX | Grundy, Hardin, Marshall, Story, Tama | 32 min |
| May 7, 3:49 PM CDT | Severe Thunderstorm Warning | DMX | Tama | 26 min |
| May 7, 3:51 PM CDT | Severe Thunderstorm Warning | DMX | Jasper, Poweshiek | 39 min |
| May 7, 4:15 PM CDT | Severe Thunderstorm Warning | DMX | Jasper, Marshall, Poweshiek, Tama | 45 min |
| May 7, 4:46 PM CDT | Severe Thunderstorm Warning | DMX | Poweshiek, Tama | 44 min |
| May 7, 5:01 PM CDT | Severe Thunderstorm Warning | DMX | Jasper, Mahaska, Poweshiek | 44 min |
| May 7, 5:38 PM CDT | Severe Thunderstorm Warning | DMX | Mahaska | 15 min |
Nearby
Severe Thunderstorm Warnings in Iowa, 2023Every severe thunderstorm warning in 2023
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.