Alert archive / Iowa / Severe Thunderstorm Warnings in 2024
Severe Thunderstorm Warning 258, NWS Des Moines, IA
NWS Des Moines, IA issued this severe thunderstorm warning at Jul 30, 2024, 4:34 AM CDT for Davis County, Wapello County, Iowa. It was in force for 26 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
- Jul 30, 2024, 4:34 AM CDT (09:34 UTC)
- Expired
- Jul 30, 2024, 5:00 AM CDT
- In force
- 26 min
- Issued by
- NWS Des Moines, IA
- Area
- Storm-based polygon
- Damage threat
- Considerable
- Hail
- 0.75 in
- Wind
- 70.0 mph
Counties Davis County, IA, Wapello County, IA
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
Davenport, (KDVN), launched 00:00Z, 9.6 hours before the alert went out and 179 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
- 478 J/kg
- Mixed-layer CIN
- -82 J/kg
- Mixed-layer LCL
- 1053 m above ground
- 0-6 km bulk shear
- 30 kt
- 0-1 km storm-relative helicity
- -10 m²/s²
- 0-3 km storm-relative helicity
- 50 m²/s²
- Significant tornado parameter
- -0.0
- Supercell composite
- -0.1
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 Jul 30, 4:20 AM CDT, 14 minutes earlier.
Area forecast discussion, Jul 30, 4:20 AM CDT, 14 minutes before
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</html>Hazardous weather outlook, Jul 29, 3:21 PM CDT, 13 hours 13 minutes before
Hazardous Weather Outlook National Weather Service Des Moines IA Issued by National Weather Service Quad Cities IA IL 321 PM CDT Mon Jul 29 2024 IAZ004>007-015>017-023>028-033>039-046>050-061-062-302030- Emmet-Kossuth-Winnebago-Worth-Palo Alto-Hancock-Cerro Gordo- Pocahontas-Humboldt-Wright-Franklin-Butler-Bremer-Sac-Calhoun- Webster-Hamilton-Hardin-Grundy-Black Hawk-Greene-Boone-Story- Marshall-Tama-Jasper-Poweshiek- 321 PM CDT Mon Jul 29 2024 This Hazardous Weather Outlook is for portions of central Iowa. .DAY ONE...Late this afternoon and tonight Scattered to numerous storms are possible overnight, with any organized storms that may develop being capable of producing strong winds and heavy rain. A few may reach severe limits. .DAYS TWO THROUGH SEVEN...Tuesday through Sunday Heat and humidity will build further on Tuesday and Wednesday, leading to peak heat index values in excess of 100 degrees each afternoon. Periodic storms are probable through Thursday with strong to severe storms and heavy rainfall possible on both Tuesday and Wednesday. .SPOTTER INFORMATION STATEMENT... Spotter activation may be needed Tuesday or Wednesday. IAZ044-045-057>060-070>075-081>086-092>097-302030- Crawford-Carroll-Audubon-Guthrie-Dallas-Polk-Cass-Adair-Madison- Warren-Marion-Mahaska-Adams-Union-Clarke-Lucas-Monroe-Wapello- Taylor-Ringgold-Decatur-Wayne-Appanoose-Davis- 321 PM CDT Mon Jul 29 2024 This Hazardous Weather Outlook is for portions of central Iowa. .DAY ONE...Late this afternoon and tonight Heat index values in the upper 90s to 105 will continue across southern Iowa through early evening. Scattered to numerous storms are possible overnight, with any organized storms likely to produce strong winds and heavy rain. A few may reach severe limits. .DAYS TWO THROUGH SEVEN...Tuesday through Sunday Heat and humidity will build further on Tuesday and Wednesday, leading to peak heat index values in southern Iowa of 105 to 110 degrees each afternoon. Periodic storms are probable through Thursday with strong to severe storms and heavy rainfall possible on both Tuesday and Wednesday. .SPOTTER INFORMATION STATEMENT... Spotter activation may be needed Tuesday or Wednesday. MTF
In the hours before
Local storm report, Jul 30, 2:51 AM CDT, 1 hour 43 minutes before
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</html>Local storm report, Jul 30, 3:05 AM CDT, 1 hour 29 minutes before
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</html>Local storm report, Jul 30, 4:07 AM CDT, 27 minutes before
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</html>Local storm report, Jul 30, 4:31 AM CDT, 3 minutes before
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</html>Local storm report, Jul 30, 4:33 AM CDT, 1 minute 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 |
|---|---|---|---|---|
| Jul 30, 12:24 AM CDT | Severe Thunderstorm Warning | DMX | Carroll, Crawford, Sac | 51 min |
| Jul 30, 1:03 AM CDT | Severe Thunderstorm Warning | DMX | Calhoun, Carroll, Greene, Humboldt, Pocahontas, Sac and 1 more | 42 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, 4:41 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; the sounding from the Mesonet's radiosonde archive.