Alert archive / Iowa / Severe Thunderstorm Warnings in 2024

Severe Thunderstorm Warning 112, NWS Sioux Falls, SD

July 30, 20244 counties in Iowa

NWS Sioux Falls, SD issued this severe thunderstorm warning at Jul 30, 2024, 12:20 AM CDT for 4 counties in Iowa. It was in force for 55 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, 12:20 AM CDT (05:20 UTC)
Expired: Jul 30, 2024, 1:15 AM CDT
In force: 55 min
Issued by: NWS Sioux Falls, SD
Area: Storm-based polygon
Damage threat: Considerable
Hail: 0.75 in
Wind: 70.0 mph

Counties Buena Vista County, IA, Cherokee County, IA, Ida County, IA, Woodbury County, IA

The radar

The Sioux Falls radar (KFSD), 147 km from the middle of the area, began a volume at 05:19 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 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, 8:47 PM CDT	Severe Thunderstorm Watch	SPC	5 hr

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 Sioux Falls, SD wrote its last area forecast discussion before this severe thunderstorm warning went out at Jul 29, 11:50 PM CDT, 30 minutes earlier.

Area forecast discussion, Jul 29, 11:50 PM CDT, 30 minutes before

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Hazardous weather outlook, Jul 29, 4:23 AM CDT, 19 hours 57 minutes before

Hazardous Weather Outlook
National Weather Service Sioux Falls SD
423 AM CDT Mon Jul 29 2024

MNZ071-072-SDZ038>040-050-052>061-063>066-068-069-300930-
Lincoln-Lyon-Beadle-Kingsbury-Brookings-Gregory-Jerauld-Sanborn-
Miner-Lake-Moody-Brule-Aurora-Davison-Hanson-McCook-Charles Mix-
Douglas-Hutchinson-Turner-Bon Homme-Yankton-
423 AM CDT Mon Jul 29 2024

This Hazardous Weather Outlook is for southwest Minnesota, central
South Dakota, east central South Dakota, south central South Dakota
and southeast South Dakota.

.DAY ONE...Today and tonight.

Isolated strong to severe storms are possible tonight with the main
threat from 8 PM to midnight. Primary hazards include: large hail up
to 2 inches, wind gusts exceeding 70 mph, and a few tornadoes. Some
locations may see rainfall exceeding 2 inches, leading to ponding of
water in low lying or urban areas or isolated flash flooding.

.DAYS TWO THROUGH SEVEN...Tuesday through Sunday.

Hot and humid conditions continue through this week. Heat index
values are expected to be in the mid 90s to near 100 degrees in the
afternoon and early evening, especially Tuesday and Wednesday. Those
who are sensitive to heat or those working outdoors for prolonged
periods of time may be impacted.

Low chances for storms continue Tuesday night and Wednesday night
with potential for isolated strong to severe storms.

.SPOTTER INFORMATION STATEMENT...

Spotter activation may be needed.

IAZ001>003-012>014-020>022-031-032-MNZ080-081-089-090-097-098-NEZ013-
014-SDZ062-067-070-071-300930-
Lyon-Osceola-Dickinson-Sioux-O'Brien-Clay-Plymouth-Cherokee-
Buena Vista-Woodbury-Ida-Murray-Cottonwood-Nobles-Jackson-Pipestone-
Rock-Dixon-Dakota-Minnehaha-Lincoln-Union-
423 AM CDT Mon Jul 29 2024

This Hazardous Weather Outlook is for northwest Iowa, west central
Iowa, southwest Minnesota, northeast Nebraska and southeast South
Dakota.

.DAY ONE...Today and tonight.

Isolated strong to severe storms are possible tonight with the main
threat from 10 PM to 2 AM. Primary hazards include: large hail up to
2 inches and wind gusts to 70 mph. Some locations may see rainfall
exceeding 2 inches, leading to ponding of water in low lying or urban
areas or isolated flash flooding.

.DAYS TWO THROUGH SEVEN...Tuesday through Sunday.

Hot and humid conditions continue through this week. Heat index
values are expected to be in the mid 90s to near 100 degrees in the
afternoon and early evening, especially Tuesday and Wednesday. Those
who are sensitive to heat or those working outdoors for prolonged
periods of time may be impacted.

Low chances for storms continue Tuesday night and Wednesday night
with potential for isolated strong to severe storms.

.SPOTTER INFORMATION STATEMENT...

Spotter activation may be needed.

In the hours before

Local storm report, Jul 29, 11:58 PM CDT, 22 minutes before

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Local storm report, Jul 30, 12:02 AM CDT, 18 minutes before

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Local storm report, Jul 30, 12:03 AM CDT, 17 minutes before

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Local storm report, Jul 30, 12:05 AM CDT, 15 minutes before

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Local storm report, Jul 30, 12:07 AM CDT, 13 minutes before

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Local storm report, Jul 30, 12:19 AM CDT, 1 minute before

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The office that day

Everything else NWS Sioux Falls, SD issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Jul 29, 7:44 PM CDT	Severe Thunderstorm Warning Destructive damage threat	FSD	Gregory	46 min
Jul 29, 8:22 PM CDT	Severe Thunderstorm Warning	FSD	Aurora, Brule, Charles Mix, Davison, Douglas	38 min
Jul 29, 8:55 PM CDT	Severe Thunderstorm Warning	FSD	Aurora, Charles Mix, Davison, Douglas, Hutchinson	50 min
Jul 29, 9:16 PM CDT	Severe Thunderstorm Warning Considerable damage threat	FSD	Bon Homme, Charles Mix, Davison, Hanson, Hutchinson, Yankton	44 min
Jul 29, 9:19 PM CDT	Severe Thunderstorm Warning	FSD	Bon Homme, Charles Mix, Gregory	41 min
Jul 29, 9:46 PM CDT	Severe Thunderstorm Warning	FSD	Clay, Hutchinson, Turner, Yankton	44 min
Jul 29, 9:53 PM CDT	Severe Thunderstorm Warning	FSD	Bon Homme, Charles Mix, Clay, Yankton	52 min
Jul 29, 10:44 PM CDT	Severe Thunderstorm Warning	FSD	Clay, Union	46 min
Jul 29, 11:18 PM CDT	Severe Thunderstorm Warning	FSD	Clay, Union	42 min
Jul 29, 11:28 PM CDT	Severe Thunderstorm Warning	FSD	Union	32 min
Jul 30, 3:05 AM CDT	Severe Thunderstorm Warning	FSD	Hanson, Lake, McCook, Miner, Minnehaha	40 min
Jul 30, 4:36 AM CDT	Severe Thunderstorm Warning	FSD	Lincoln, McCook, Minnehaha, Turner	39 min
Jul 30, 5:09 AM CDT	Severe Thunderstorm Warning	FSD	Clay, Lincoln, Turner, Union	51 min
Jul 30, 6:15 AM CDT	Severe Thunderstorm Warning	FSD	Brule	45 min
Jul 30, 6:48 AM CDT	Severe Thunderstorm Warning	FSD	Aurora, Brule, Jerauld	42 min
Jul 30, 7:14 AM CDT	Severe Thunderstorm Warning	FSD	Aurora, Davison, Sanborn	46 min
Jul 30, 7:41 AM CDT	Severe Thunderstorm Warning	FSD	Davison, Hanson, McCook	34 min
Jul 30, 8:14 AM CDT	Severe Thunderstorm Warning	FSD	Lincoln, Union	28 min
Jul 29, 11:49 PM CDT	Severe Thunderstorm Warning	FSD	Cherokee, Ida, Plymouth, Woodbury	41 min

Nearby

Severe Thunderstorm Warnings in Iowa, 2024 Every 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; radar from the NEXRAD Level II archive.