Alert archive / South Dakota / Flash Flood Warnings in 2025

Flash Flood Warning 8, NWS Aberdeen, SD

July 22, 2025Dewey County, Potter County, Walworth County, South Dakota

NWS Aberdeen, SD issued this flash flood warning at Jul 22, 2025, 1:36 AM MDT for Dewey County, Potter County, Walworth County, South Dakota. It was in force for 3 hr. 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 22, 2025, 1:36 AM MDT (07:36 UTC)
Expired: Jul 22, 2025, 4:37 AM MDT
In force: 3 hr
Issued by: NWS Aberdeen, SD
Area: Storm-based polygon
Flood severity: None

Counties Dewey County, SD, Potter County, SD, Walworth County, SD

The radar

The Aberdeen radar (KABR), 149 km from the middle of the area, began a volume at 07:36 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.

What forecasters said that day

The local office's own words before this flash flood warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS Aberdeen, SD wrote its last area forecast discussion before this flash flood warning went out at Jul 21, 11:20 PM MDT, 2 hours 16 minutes earlier.

Area forecast discussion, Jul 21, 11:20 PM MDT, 2 hours 16 minutes before

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Hazardous weather outlook, Jul 21, 2:09 PM MDT, 11 hours 27 minutes before

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In the hours before

Local storm report, Jul 21, 11:08 PM MDT, 2 hours 28 minutes before

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Local storm report, Jul 21, 11:28 PM MDT, 2 hours 8 minutes before

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Special weather statement, Jul 21, 11:46 PM MDT, 1 hour 50 minutes before

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Special weather statement, Jul 22, 12:07 AM MDT, 1 hour 29 minutes before

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Special weather statement, Jul 22, 12:40 AM MDT, 56 minutes before

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      <h1 id="headline">This service is currently unavailable.</h1>
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      <p id="message2">
        Please try again in a few minutes.
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        If you are an administrator, restore upstream service and remove the redirect/fallback rule when normal operations resume.
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Special weather statement, Jul 22, 1:10 AM MDT, 26 minutes before

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        If you are an administrator, restore upstream service and remove the redirect/fallback rule when normal operations resume.
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The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 21, 8:53 PM MDT	Severe Thunderstorm Warning Considerable damage threat	ABR	Corson, Dewey	52 min
Jul 21, 9:38 PM MDT	Severe Thunderstorm Warning Considerable damage threat	ABR	Corson, Dewey	37 min
Jul 21, 10:12 PM MDT	Severe Thunderstorm Warning Considerable damage threat	ABR	Campbell, Corson, Dewey, Walworth	48 min
Jul 21, 10:50 PM MDT	Severe Thunderstorm Warning	ABR	Campbell, Corson, McPherson, Walworth	55 min
Jul 21, 11:00 PM MDT	Special Weather Statement	ABR	Edmunds, Potter, Walworth	45 min
Jul 21, 11:46 PM MDT	Special Weather Statement	ABR	Edmunds, McPherson	59 min
Jul 22, 12:07 AM MDT	Special Weather Statement	ABR	Corson	38 min
Jul 22, 12:29 AM MDT	Severe Thunderstorm Warning	ABR	Dewey, Potter	46 min
Jul 22, 12:40 AM MDT	Special Weather Statement	ABR	Brown	50 min
Jul 22, 1:10 AM MDT	Special Weather Statement	ABR	Walworth	50 min
Jul 22, 1:40 AM MDT	Heat Advisory	ABR	Brown, Buffalo, Clark, Codington, Deuel, Dewey and 14 more	16 hr
Jul 22, 4:37 AM MDT	Areal Flood Warning	ABR	Dewey, Potter, Walworth	4 hr
Jul 22, 9:26 AM MDT	Severe Thunderstorm Warning	ABR	Brown	35 min
Jul 22, 2:39 PM MDT	Special Weather Statement	ABR	Edmunds, Hughes, Potter, Sully	36 min
Jul 22, 3:12 PM MDT	Severe Thunderstorm Warning	ABR	Hughes, Lyman, Stanley	48 min
Jul 22, 3:25 PM MDT	Special Weather Statement	ABR	Edmunds	35 min
Jul 22, 3:57 PM MDT	Special Weather Statement	ABR	Faulk	18 min
Jul 22, 5:46 PM MDT	Tornado Warning	ABR	Traverse	44 min

Nearby

Flash Flood Warnings in South Dakota, 2025 Every flash flood warning in 2025

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.