Alert archive / Iowa / Severe Thunderstorm Warnings in 2023
Severe Thunderstorm Warning 63, NWS Des Moines, IA
NWS Des Moines, IA issued this severe thunderstorm warning at May 7, 2023, 1:24 PM CDT for Carroll County, Greene County, Iowa. It was in force for 51 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, 1:24 PM CDT (18:24 UTC)
- Expired
- May 7, 2023, 2:15 PM CDT
- In force
- 51 min
- Issued by
- NWS Des Moines, IA
- Area
- Storm-based polygon
- Hail
- 1.25 in
- Wind
- 50.0 mph
Counties Carroll County, IA, Greene County, IA
The radar
The Des Moines radar (KDMX), 82 km from the middle of the area, began a volume at 18:28 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 12:00Z, 6.4 hours before the alert went out and 165 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
- 570 J/kg
- Mixed-layer CIN
- -206 J/kg
- Mixed-layer LCL
- 1052 m above ground
- 0-6 km bulk shear
- 53 kt
- 0-1 km storm-relative helicity
- 113 m²/s²
- 0-3 km storm-relative helicity
- 263 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 1.6
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 May 7, 12:46 PM CDT, 38 minutes earlier.
Area forecast discussion, May 7, 12:46 PM CDT, 38 minutes before
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</html>Hazardous weather outlook, May 7, 4:49 AM CDT, 8 hours 35 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
Special weather statement, May 7, 8:53 AM CDT, 4 hours 31 minutes before
Special Weather Statement National Weather Service Des Moines IA 853 AM CDT Sun May 7 2023 IAZ045-046-057-058-071430- Guthrie IA-Audubon IA-Greene IA-Carroll IA- 853 AM CDT Sun May 7 2023 ...A strong thunderstorm will impact portions of western Greene, northern Guthrie, northeastern Audubon and southern Carroll Counties through 930 AM CDT... At 853 AM CDT, Doppler radar was tracking a strong thunderstorm 8 miles west of Coon Rapids, or 11 miles northeast of Audubon, moving east at 40 mph. HAZARD...Penny size hail. SOURCE...Radar indicated. IMPACT...Minor damage to outdoor objects is possible. This strong thunderstorm will be near... Coon Rapids around 905 AM CDT. Other locations in the path of this storm include Jefferson. PRECAUTIONARY/PREPAREDNESS ACTIONS... If outdoors, consider seeking shelter inside a building. && LAT...LON 4171 9493 4195 9503 4220 9441 4183 9429 TIME...MOT...LOC 1353Z 248DEG 33KT 4187 9484 MAX HAIL SIZE...0.75 IN MAX WIND GUST...<30 MPH Lee
Local storm report, May 7, 9:16 AM CDT, 4 hours 8 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE DES MOINES IA
916 AM CDT SUN MAY 7 2023
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0910 AM HAIL COON RAPIDS 41.88N 94.68W
05/07/2023 E0.50 INCH CARROLL IA TRAINED SPOTTER
PEA-MARBLE SIZED HAIL.
&&
MPSpecial weather statement, May 7, 9:21 AM CDT, 4 hours 3 minutes before
Special Weather Statement National Weather Service Des Moines IA 921 AM CDT Sun May 7 2023 IAZ046-047-058-059-071-072-071530- Greene-Boone-Guthrie-Dallas-Adair-Madison- Including the cities of Jefferson, Boone, Guthrie Center, Panora, Bayard, Casey, Perry, Waukee, Adel, Greenfield, Stuart, Adair, Fontanelle, Winterset, and Earlham 921 AM CDT Sun May 7 2023 ...Scattered Storms Producing Hail This Morning... Scattered thunderstorms will affect parts of west central into central Iowa this morning. Through 1030 am, most of the storms will be found in areas from around Jefferson to Ames, south to Greenfield and Winterset. A few locations within that area will experience penny to nickel sized hail and cloud to ground lightning strikes. Lee
Special weather statement, May 7, 10:04 AM CDT, 3 hours 20 minutes before
Special Weather Statement
National Weather Service Des Moines IA
1004 AM CDT Sun May 7 2023
IAZ047-048-059-060-071545-
Story IA-Boone IA-Polk IA-Dallas IA-
1004 AM CDT Sun May 7 2023
...A strong thunderstorm will impact portions of northwestern Polk,
Story, southern Boone and northeastern Dallas Counties through 1045
AM CDT...
At 1004 AM CDT, Doppler radar was tracking a strong thunderstorm over
Madrid, or 12 miles south of Boone, moving east at 45 mph.
HAZARD...Nickel size hail.
SOURCE...Radar indicated.
IMPACT...Minor damage to outdoor objects is possible.
This strong thunderstorm will be near...
Big Creek Lake around 1010 AM CDT.
Slater around 1015 AM CDT.
Other locations in the path of this storm include Huxley, Iowa State
Center and Nevada.
This includes Interstate 35 between mile markers 98 and 125.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
If outdoors, consider seeking shelter inside a building.
Frequent cloud to ground lightning is occurring with this storm.
Lightning can strike 10 miles away from a thunderstorm. Seek a safe
shelter inside a building or vehicle.
This storm may intensify, so be certain to monitor local radio
stations and available television stations for additional information
and possible warnings from the National Weather Service.
&&
LAT...LON 4171 9388 4197 9409 4220 9358 4220 9324
4189 9325
TIME...MOT...LOC 1504Z 247DEG 38KT 4188 9386
MAX HAIL SIZE...0.88 IN
MAX WIND GUST...<30 MPH
LeeLocal storm report, May 7, 10:45 AM CDT, 2 hours 39 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE DES MOINES IA
1045 AM CDT SUN MAY 7 2023
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
1040 AM HAIL GRIMES 41.69N 93.80W
05/07/2023 E0.25 INCH POLK IA TRAINED SPOTTER
&&
MPLocal storm report, May 7, 10:49 AM CDT, 2 hours 35 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE DES MOINES IA
1049 AM CDT SUN MAY 7 2023
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
1045 AM HAIL POLK CITY 41.77N 93.72W
05/07/2023 E0.25 INCH POLK IA TRAINED SPOTTER
&&
MPThe 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, 2:03 PM CDT | Severe Thunderstorm Warning | DMX | Boone, Greene, Webster | 26 min |
| May 7, 2:56 PM CDT | Severe Thunderstorm Warning | DMX | Boone, Hamilton, Hardin, Marshall, Story | 49 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.