Alert archive / Iowa / Severe Thunderstorm Warnings in 2024
Severe Thunderstorm Warning 252, NWS Des Moines, IA
NWS Des Moines, IA issued this severe thunderstorm warning at Jul 30, 2024, 1:03 AM CDT for 7 counties in Iowa. It was in force for 42 min. 2 reports came from inside the area while it was in force.
The area
The outline as issued, with what was reported inside it.
The facts
- Issued
- Jul 30, 2024, 1:03 AM CDT (06:03 UTC)
- Expired
- Jul 30, 2024, 1:45 AM CDT
- In force
- 42 min
- Issued by
- NWS Des Moines, IA
- Area
- Storm-based polygon
- Hail
- 0.75 in
- Wind
- 60.0 mph
Counties Calhoun County, IA, Carroll County, IA, Greene County, IA, Humboldt County, IA, Pocahontas County, IA, Sac County, IA, Webster County, IA
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| Jul 30, 1:14 AM CDT | TSTM WND DMG | Sac City, IA | Delayed report. Multiple branches up to 6 inches down across town. One larger 12 inch branch down. Flattened corn outside of town. Time estimated from radar. |
| Jul 30, 1:27 AM CDT | TSTM WND GST 60 | 2 S Willey, IA | Personal weather station. |
Local storm reports filed while the alert was in force, from inside its polygon or its counties.
The watch it was issued in
The SPC watch in force over the same counties when this warning went out.
| Issued | Product | Office | Lasted |
|---|---|---|---|
| Jul 29, 11:56 PM CDT | Severe Thunderstorm Watch | SPC | 5 hr |
The nearest sounding before it
Omaha, NE (KOAX), launched 00:00Z, 6.1 hours before the alert went out and 192 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
- 3391 J/kg
- Mixed-layer CIN
- -43 J/kg
- Mixed-layer LCL
- 1320 m above ground
- 0-6 km bulk shear
- 33 kt
- 0-1 km storm-relative helicity
- 3 m²/s²
- 0-3 km storm-relative helicity
- 108 m²/s²
- Significant tornado parameter
- 0.3
- Supercell composite
- 1.6
The text
As transmitted.
315
WUUS53 KDMX 300603
SVRDMX
IAC025-027-073-091-151-161-187-300645-
/O.NEW.KDMX.SV.W.0252.240730T0603Z-240730T0645Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Des Moines IA
Issued by National Weather Service Quad Cities IA/IL
103 AM CDT Tue Jul 30 2024
The National Weather Service in Des Moines has issued a
* Severe Thunderstorm Warning for...
Greene County in west central Iowa...
Webster County in central Iowa...
Southern Pocahontas County in northwestern Iowa...
Eastern Sac County in west central Iowa...
Calhoun County in west central Iowa...
Southern Humboldt County in north central Iowa...
Carroll County in west central Iowa...
* Until 145 AM CDT.
* At 103 AM CDT, severe thunderstorms were located along a line
extending from 5 miles northwest of Newell to 4 miles north of Sac
City to near Auburn to 4 miles west of Carroll to near Templeton,
moving east at 65 mph.
HAZARD...60 mph wind gusts.
SOURCE...Radar indicated.
IMPACT...Expect damage to roofs, siding, and trees.
* Severe thunderstorms will be near...
Carroll, Lake City, Glidden, Fonda, Auburn, Lytton, Dedham and
Lidderdale around 110 AM CDT.
Rockwell City, Coon Rapids, South Twin Lake, North Twin Lake,
Pomeroy, Twin Lakes, Ralston and Twin Lakes State Park around 115
AM CDT.
Manson, Scranton, Churdan, Lohrville, Palmer and Rinard around 120
AM CDT.
Other locations in the path of these severe thunderstorms include
Jefferson, Farnhamville, Somers, Knierim, Gowrie, Barnum, Jefferson
Municipal Airport, Grand Junction, Callender, Rippey, Paton,
Moorland, Clare and Dana.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
sturdy building.
To report severe weather, contact your nearest law enforcement
agency. They will send your report to the National Weather Service
office in Des Moines .
&&
LAT...LON 4209 9498 4227 9498 4256 9505 4256 9492
4275 9491 4272 9399 4264 9397 4247 9397
4247 9393 4221 9393 4221 9416 4186 9417
4187 9508
TIME...MOT...LOC 0603Z 286DEG 55KT 4269 9505 4248 9498 4227 9494 4209
9494 4194 9501
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...<.75 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH
$$
JTS1 follow-up statement
024
WWUS53 KDMX 300634
SVSDMX
Severe Weather Statement
National Weather Service Des Moines IA
Issued by National Weather Service Quad Cities IA/IL
134 AM CDT Tue Jul 30 2024
IAC025-027-073-091-151-161-187-300645-
/O.CON.KDMX.SV.W.0252.000000T0000Z-240730T0645Z/
Greene IA-Webster IA-Pocahontas IA-Sac IA-Calhoun IA-Humboldt IA-
Carroll IA-
134 AM CDT Tue Jul 30 2024
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 145 AM CDT
FOR GREENE...WEBSTER...SOUTHERN POCAHONTAS...EASTERN SAC...CALHOUN...
SOUTHWESTERN HUMBOLDT AND CARROLL COUNTIES...
At 133 AM CDT, severe thunderstorms were located along a line
extending from 4 miles northeast of Manson to Somers to 5 miles east
of Churdan to near Jefferson Municipal Airport to near Bagley, moving
east at 65 mph.
HAZARD...60 mph wind gusts.
SOURCE...Public. At 127 AM, a wind gust of 60 mph was reported 2
miles south of Willey from a personal weather station.
IMPACT...Expect damage to roofs, siding, and trees.
Locations impacted include...
Fort Dodge, Gowrie, Fort Dodge Regional Airport, Grand Junction,
Callender, Harcourt, Rippey, Paton, Dayton, Coalville, Otho,
Lehigh, Woodman Hollow State Park, Dolliver Memorial State Park,
Stratford, Duncombe and Brushy Creek St Recreation Area.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
To report severe weather contact your nearest law enforcement agency.
They will send your report to the National Weather Service office in
Des Moines .
&&
LAT...LON 4209 9498 4227 9498 4256 9505 4256 9492
4271 9490 4270 9444 4264 9444 4264 9417
4260 9404 4247 9397 4247 9393 4221 9393
4221 9416 4186 9417 4187 9508
TIME...MOT...LOC 0633Z 286DEG 55KT 4257 9447 4236 9441 4215 9437 4197
9437 4182 9444
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...<.75 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH
$$
JTSThe office that day
Everything else NWS Des Moines, IA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 30, 12:24 AM CDT | Severe Thunderstorm Warning | DMX | Carroll, Crawford, Sac | 51 min |
| Jul 30, 1:29 AM CDT | Severe Thunderstorm Warning | DMX | Adair, Audubon, Carroll, Cass, Dallas, Greene and 1 more | 46 min |
| Jul 30, 1:43 AM CDT | Severe Thunderstorm Warning | DMX | Audubon, Boone, Calhoun, Carroll, Dallas, Greene and 5 more | 47 min |
| Jul 30, 2:23 AM CDT | Severe Thunderstorm Warning | DMX | Boone, Dallas, Greene, Jasper, Marion, Marshall and 4 more | 52 min |
| Jul 30, 3:05 AM CDT | Severe Thunderstorm Warning | DMX | Clarke, Jasper, Lucas, Mahaska, Marion, Monroe and 2 more | 40 min |
| Jul 30, 3:40 AM CDT | Severe Thunderstorm Warning | DMX | Appanoose, Davis, Lucas, Mahaska, Marion, Monroe and 3 more | 65 min |
| Jul 30, 4:34 AM CDT | Severe Thunderstorm Warning | DMX | Davis, Wapello | 26 min |
| Jul 30, 4:41 AM CDT | Severe Thunderstorm Warning | DMX | Davis, Wapello | 19 min |
| Jul 30, 7:59 AM CDT | Special Weather Statement | DMX | Calhoun, Carroll, Crawford, Greene | 31 min |
| Jul 30, 8:25 AM CDT | Severe Thunderstorm Warning | DMX | Audubon, Boone, Carroll, Dallas, Greene, Guthrie | 50 min |
| Jul 30, 8:53 AM CDT | Severe Thunderstorm Warning | DMX | Boone, Dallas, Greene, Guthrie, Madison, Polk and 2 more | 67 min |
| Jul 30, 9:08 AM CDT | Severe Thunderstorm Warning | DMX | Adair, Audubon, Cass, Dallas, Guthrie, Madison and 1 more | 67 min |
| Jul 30, 9:44 AM CDT | Severe Thunderstorm Warning | DMX | Clarke, Jasper, Lucas, Madison, Mahaska, Marion and 3 more | 61 min |
| Jul 30, 10:00 AM CDT | Severe Thunderstorm Warning | DMX | Adair, Clarke, Decatur, Lucas, Madison, Ringgold and 2 more | 60 min |
| Jul 30, 10:12 AM CDT | Severe Thunderstorm Warning | DMX | Appanoose, Davis, Lucas, Mahaska, Marion, Monroe and 3 more | 78 min |
| Jul 30, 10:54 AM CDT | Special Weather Statement | DMX | Boone | 51 min |
| Jul 30, 1:04 PM CDT | Severe Thunderstorm Warning | DMX | Jasper, Marion, Polk | 30 min |
| Jul 30, 1:09 PM CDT | Severe Thunderstorm Warning | DMX | Jasper, Marion, Polk, Warren | 51 min |
| Jul 30, 1:15 PM CDT | Special Weather Statement | DMX | Polk | 30 min |
| Jul 30, 1:51 PM CDT | Severe Thunderstorm Warning | DMX | Jasper, Polk | 39 min |
| Jul 30, 2:11 PM CDT | Severe Thunderstorm Warning | DMX | Mahaska, Marion | 64 min |
| Jul 30, 2:13 PM CDT | Severe Thunderstorm Warning | DMX | Jasper, Marion | 47 min |
| Jul 30, 2:42 PM CDT | Severe Thunderstorm Warning | DMX | Mahaska, Marion | 32 min |
| Jul 30, 3:08 PM CDT | Severe Thunderstorm Warning | DMX | Mahaska, Marion, Monroe, Wapello | 52 min |
| Jul 30, 3:18 PM CDT | Heat Advisory | DMX | Adair, Adams, Appanoose, Audubon, Boone, Calhoun and 25 more | 28 hr |
| Jul 30, 3:27 PM CDT | Flood Watch | DMX | Boone, Calhoun, Carroll, Dallas, Davis, Greene and 14 more | 16 hr |
| Jul 30, 3:29 PM CDT | Flash Flood Warning | DMX | Jasper, Mahaska, Marion | 3 hr |
| Jul 30, 3:34 PM CDT | Severe Thunderstorm Warning | DMX | Appanoose, Davis, Monroe, Wapello | 59 min |
| Jul 30, 3:57 PM CDT | Severe Thunderstorm Warning | DMX | Mahaska, Marion | 48 min |
| Jul 30, 4:43 PM CDT | Severe Thunderstorm Warning | DMX | Mahaska | 34 min |
| Jul 30, 5:50 PM CDT | Special Weather Statement | DMX | Wapello | 25 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive.