Alert archive / Iowa / Severe Thunderstorm Warnings in 2023
Severe Thunderstorm Warning 94, NWS Des Moines, IA
NWS Des Moines, IA issued this severe thunderstorm warning at Jun 17, 2023, 8:22 PM CDT for 4 counties in Iowa. It was in force for 38 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 17, 2023, 8:22 PM CDT (01:22 UTC)
- Expired
- Jun 17, 2023, 9:00 PM CDT
- In force
- 38 min
- Issued by
- NWS Des Moines, IA
- Area
- Storm-based polygon
- Hail
- 1.25 in
- Wind
- 60.0 mph
Counties Adair County, IA, Adams County, IA, Madison County, IA, Union County, IA
The radar
The Des Moines radar (KDMX), 81 km from the middle of the area, began a volume at 01:24 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 17, 3:13 PM CDT | Severe Thunderstorm Watch | SPC | 7 hr |
The nearest sounding before it
Topeka, KS (KTOP), launched 00:00Z, 1.4 hours before the alert went out and 266 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
- 1102 J/kg
- Mixed-layer CIN
- -6 J/kg
- Mixed-layer LCL
- 1832 m above ground
- 0-6 km bulk shear
- 32 kt
- 0-1 km storm-relative helicity
- 46 m²/s²
- 0-3 km storm-relative helicity
- 65 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 1.8
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 17, 6:50 PM CDT, 1 hour 32 minutes earlier.
Area forecast discussion, Jun 17, 6:50 PM CDT, 1 hour 32 minutes before
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</html>Hazardous weather outlook, Jun 17, 2:15 PM CDT, 6 hours 7 minutes before
Hazardous Weather Outlook National Weather Service Des Moines IA 215 PM CDT Sat Jun 17 2023 IAZ004>007-015>017-023>028-033>039-044>050-057>062-070>075- 081>086-092>097-181915- 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- 215 PM CDT Sat Jun 17 2023 This Hazardous Weather Outlook is for portions of central Iowa. .DAY ONE...This afternoon and tonight Scattered thunderstorms will develop over western Iowa through this afternoon and spread east this evening into tonight. A few strong to severe storms may produce hail and gusty winds this afternoon and evening, mainly over the western half of the state, before the threat diminishes overnight. Locally heavy rainfall will also be possible, but any threat of impacts would be isolated. .DAYS TWO THROUGH SEVEN...Sunday through Friday A few thunderstorms will remain possible on Sunday, but severe weather is not expected. Thunderstorm chance may then return to the forecast later in the week, but confidence in any details is low at this range. .SPOTTER INFORMATION STATEMENT... Spotters may be needed through this evening.
In the hours before
Special weather statement, Jun 17, 6:23 PM CDT, 1 hour 59 minutes before
Special Weather Statement
National Weather Service Des Moines IA
623 PM CDT Sat Jun 17 2023
IAZ046-047-180000-
Boone IA-Greene IA-
623 PM CDT Sat Jun 17 2023
...A strong thunderstorm will impact portions of southeastern Greene
and western Boone Counties through 700 PM CDT...
At 622 PM CDT, Doppler radar was tracking a strong thunderstorm 6
miles north of Perry, moving northeast at 25 mph.
HAZARD...Winds in excess of 40 mph.
SOURCE...Radar indicated.
IMPACT...Gusty winds could knock down tree limbs and blow around
unsecured objects.
Locations impacted include...
Ogden, Woodward, Grand Junction, Rippey, Beaver and Berkley.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
If outdoors, consider seeking shelter inside a building.
A Severe Thunderstorm Watch remains in effect until 1000 PM CDT for
central and west central Iowa.
&&
LAT...LON 4215 9402 4187 9385 4186 9388 4186 9421
4199 9430
TIME...MOT...LOC 2322Z 243DEG 21KT 4193 9414
MAX HAIL SIZE...0.00 IN
MAX WIND GUST...40 MPH
BuryLocal storm report, Jun 17, 7:20 PM CDT, 1 hour 2 minutes before
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</html>Local storm report, Jun 17, 7:57 PM CDT, 25 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 17, 7:11 PM CDT | Severe Thunderstorm Warning | DMX | Adair, Guthrie | 49 min |
| Jun 17, 7:34 PM CDT | Severe Thunderstorm Warning | DMX | Adair, Dallas, Guthrie, Madison | 41 min |
| Jun 17, 9:07 PM CDT | Special Weather Statement | DMX | Story | 23 min |
| Jun 17, 9:29 PM CDT | Special Weather Statement | DMX | Clarke | 31 min |
| Jun 17, 9:35 PM CDT | Special Weather Statement | DMX | Marshall | 40 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.