Alert archive / Iowa / Severe Thunderstorm Warnings in 2024
Severe Thunderstorm Warning 158, NWS Des Moines, IA
NWS Des Moines, IA issued this severe thunderstorm warning at Jun 12, 2024, 11:17 PM CDT for Franklin County, Grundy County, Hardin County, Iowa. It was in force for 43 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 12, 2024, 11:17 PM CDT (04:17 UTC)
- Expired
- Jun 13, 2024, 12:00 AM CDT
- In force
- 43 min
- Issued by
- NWS Des Moines, IA
- Area
- Storm-based polygon
- Hail
- 1.0 in
- Wind
- 60.0 mph
Counties Franklin County, IA, Grundy County, IA, Hardin County, IA
The radar
The Des Moines radar (KDMX), 100 km from the middle of the area, began a volume at 04:19 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
Minneapolis, MN (KMPX), launched 00:00Z, 4.3 hours before the alert went out and 264 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
- 1263 J/kg
- Mixed-layer CIN
- -161 J/kg
- Mixed-layer LCL
- 1298 m above ground
- 0-6 km bulk shear
- 52 kt
- 0-1 km storm-relative helicity
- 279 m²/s²
- 0-3 km storm-relative helicity
- 254 m²/s²
- Significant tornado parameter
- 0.3
- Supercell composite
- 4.4
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 12, 6:32 PM CDT, 4 hours 45 minutes earlier.
Area forecast discussion, Jun 12, 6:32 PM CDT, 4 hours 45 minutes before
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</html>Hazardous weather outlook, Jun 12, 3:13 PM CDT, 8 hours 4 minutes before
Hazardous Weather Outlook National Weather Service Des Moines IA 313 PM CDT Wed Jun 12 2024 IAZ004>007-015>017-023>028-033>039-044>050-057>062-070>075- 081>086-092>097-132015- 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- 313 PM CDT Wed Jun 12 2024 This Hazardous Weather Outlook is for portions of central Iowa. .DAY ONE...This afternoon and tonight Strong to severe storms are possible, especially over northern and possibly central Iowa this afternoon to evening. Damaging winds and hail are the main threats, though a tornado or two cannot be ruled out. .DAYS TWO THROUGH SEVEN...Thursday through Tuesday Additional storms are forecast Thursday, with strong to severe storms possible in portions of southern and eastern Iowa in the afternoon to evening. Hail and damaging winds are the primary threats, although a tornado or two cannot be ruled out. Active weather is expected to continue this weekend and into early next week with multiple chances for showers and storms. More details regarding timing and severe potential will be better known in the coming days. Heat will continue to build into the weekend with heat index values near 100 in southern Iowa Thursday, with warmtemperatures resuming Saturday and lasting into next week. Outside of Friday, temperatures in the upper 80s to mid 90s are generally expected. .SPOTTER INFORMATION STATEMENT... Spotter activation may be needed at various times this week and weekend.
In the hours before
Special weather statement, Jun 12, 6:48 PM CDT, 4 hours 29 minutes before
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</html>Special weather statement, Jun 12, 10:43 PM CDT, 34 minutes before
Special Weather Statement
National Weather Service Des Moines IA
1043 PM CDT Wed Jun 12 2024
IAZ025>027-037-130430-
Wright IA-Hardin IA-Franklin IA-Butler IA-
1043 PM CDT Wed Jun 12 2024
...A STRONG THUNDERSTORM WILL IMPACT NORTHERN HARDIN...SOUTHERN
FRANKLIN...EAST CENTRAL WRIGHT AND SOUTHWESTERN BUTLER COUNTIES
THROUGH 1130 PM CDT...
At 1043 PM CDT, Doppler radar was tracking a strong thunderstorm 8
miles northwest of Iowa Falls, moving southeast at 30 mph.
HAZARD...Wind gusts up to 50 mph and penny size hail.
SOURCE...Radar indicated.
IMPACT...Gusty winds could knock down tree limbs and blow around
unsecured objects. Minor hail damage to vegetation is
possible.
Locations impacted include...
Iowa Falls, Ackley, Alden, Dows, Coulter, Geneva, Rowan, Bradford,
Popejoy, Owasa, Galt, Iowa Falls Municipal Airport, and Ackley
Municipal Airport.
This includes Interstate 35 between mile markers 153 and 165.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
If outdoors, consider seeking shelter inside a building.
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.
To report severe weather, contact your nearest law enforcement
agency. They will relay your report to the National Weather Service
office in Des Moines .
&&
LAT...LON 4256 9301 4256 9303 4253 9303 4232 9317
4264 9361 4278 9360 4265 9294
TIME...MOT...LOC 0343Z 295DEG 26KT 4262 9337
MAX HAIL SIZE...0.75 IN
MAX WIND GUST...50 MPH
REVThe office that day
Everything else NWS Des Moines, IA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 12, 7:57 PM CDT | Special Weather Statement | DMX | Webster | 48 min |
| Jun 12, 8:24 PM CDT | Severe Thunderstorm Warning | DMX | Webster | 39 min |
| Jun 12, 10:43 PM CDT | Special Weather Statement | DMX | Hardin | 47 min |
| Jun 13, 2:55 PM CDT | Severe Thunderstorm Warning | DMX | Appanoose, Davis | 50 min |
| Jun 13, 3:39 PM CDT | Severe Thunderstorm Warning | DMX | Appanoose, Davis | 17 min |
| Jun 13, 3:47 PM CDT | Severe Thunderstorm Warning | DMX | Davis, Wapello | 43 min |
| Jun 13, 4:15 PM CDT | Severe Thunderstorm Warning | DMX | Davis | 45 min |
Nearby
Severe Thunderstorm Warnings in Iowa, 2024Every severe thunderstorm warning in 2024
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.