Alert archive / South Dakota / Severe Thunderstorm Warnings in 2025

Severe Thunderstorm Warning 162, NWS Aberdeen, SD

July 27, 20254 counties in South Dakota

NWS Aberdeen, SD issued this severe thunderstorm warning at Jul 27, 2025, 6:19 PM CDT for 4 counties in South Dakota. It was in force for 41 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 27, 2025, 6:19 PM CDT (23:19 UTC)
Expired
Jul 27, 2025, 7:00 PM CDT
In force
41 min
Issued by
NWS Aberdeen, SD
Area
Storm-based polygon
Tornado
Possible
Damage threat
Considerable
Hail
2.0 in
Wind
60.0 mph

Counties Codington County, SD, Deuel County, SD, Grant County, SD, Hamlin County, SD

The radar

The Aberdeen radar (KABR), 130 km from the middle of the area, began a volume at 23:20 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.

IssuedProductOfficeLasted
Jul 27, 4:47 PM CDTSevere Thunderstorm WatchSPC9 hr

The nearest sounding before it

Aberdeen, SD (KABR), launched 12:00Z, 11.3 hours before the alert went out and 114 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.

Skew-T log-pSkew-T log-p diagram, Aberdeen, SD at 12:00Z on 2025-07-27Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1882 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Aberdeen, SD at 12:00Z on 2025-07-27The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 67 square meters per square second.19395878Sfc1 km3 km6 km9 kmRMLM
The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.
Mixed-layer CAPE
1882 J/kg
Mixed-layer CIN
-246 J/kg
Mixed-layer LCL
1193 m above ground
0-6 km bulk shear
25 kt
0-1 km storm-relative helicity
67 m²/s²
0-3 km storm-relative helicity
40 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.1

Open this sounding in Storm Lab

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 Aberdeen, SD wrote its last area forecast discussion before this severe thunderstorm warning went out at Jul 27, 2:34 PM CDT, 3 hours 45 minutes earlier.

Area forecast discussion, Jul 27, 2:34 PM CDT, 3 hours 45 minutes before
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Hazardous weather outlook, Jul 27, 3:23 PM CDT, 2 hours 56 minutes before
Hazardous Weather Outlook
National Weather Service Aberdeen SD
323 PM CDT Sun Jul 27 2025

SDZ003>005-009-015-016-282030-
Corson-Campbell-McPherson-Walworth-Dewey-Potter-
323 PM CDT Sun Jul 27 2025 /223 PM MDT Sun Jul 27 2025/

This Hazardous Weather Outlook is for north central South Dakota.

.DAY ONE...This afternoon and tonight.

There is a marginal risk (level 1 out of 5) for isolated severe
storms this evening. Storms will be capable of producing winds of 60
mph and hail 1 inch in diameter.

.DAYS TWO THROUGH SEVEN...Monday through Saturday.

There is a slight risk (level 2 out of 5) for severe storms Monday
afternoon and evening. Storms will be capable of producing winds of
70 mph and hail 2 inches in diameter.

.SPOTTER INFORMATION STATEMENT...

Spotter activation may be requested. Weather spotters are encouraged
to submit reports to the National Weather Service in Aberdeen. The
public can submit reports on our web page, Facebook page, or our X
feed.

SDZ006-007-011-018-019-282030-
Brown-Marshall-Day-Spink-Clark-
323 PM CDT Sun Jul 27 2025

This Hazardous Weather Outlook is for northeast South Dakota.

.DAY ONE...This afternoon and tonight.

A heat advisory will be in effect until 8 PM CDT for heat index
values up to 104 degrees.

There is also a slight risk (level 2 out of 5) for severe storms
in the James River and on and east of the Prairie Coteau late this
afternoon into the overnight hours. These storms will be capable of
producing wind gusts of 70 mph and hail 2 inches in diameter.

.DAYS TWO THROUGH SEVEN...Monday through Saturday.

There is a slight risk (level 2 out of 5) for scattered severe
storms Monday evening. These storms will be capable of producing
wind gusts of 70 mph and hail 2 inches in diameter.

.SPOTTER INFORMATION STATEMENT...

Spotter activation may be requested. Weather spotters are encouraged
to submit reports to the National Weather Service in Aberdeen. The
public can submit reports on our web page, Facebook page, or our X
feed.

SDZ010-017-034-282030-
Edmunds-Faulk-Sully-
323 PM CDT Sun Jul 27 2025

This Hazardous Weather Outlook is for central South Dakota and
north central South Dakota.

.DAY ONE...This afternoon and tonight.

A heat advisory will be in effect until 8 PM CDT for heat index
values up to 104 degrees F.

.DAYS TWO THROUGH SEVEN...Monday through Saturday.

There is a slight risk (level 2 out of 5) for scattered severe
storms Monday evening. These storms will be capable of producing
wind gusts of 70 mph and hail 2 inches in diameter.

.SPOTTER INFORMATION STATEMENT...

Spotter activation may be requested. Weather spotters are encouraged
to submit reports to the National Weather Service in Aberdeen. The
public can submit reports on our web page, Facebook page, or our X
feed.

MNZ039-046-SDZ008-020>023-282030-
Traverse-Big Stone-Roberts-Codington-Grant-Hamlin-Deuel-
323 PM CDT Sun Jul 27 2025

This Hazardous Weather Outlook is for west central Minnesota and
northeast South Dakota.

.DAY ONE...This afternoon and tonight.

A heat advisory will be in effect until 8 PM CDT for heat index
values up to 104 degrees.

There is also an enhanced risk (level 3 out of 5) for severe storms
on and east of the Prairie Coteau late this afternoon into the
overnight hours. These storms will be capable of producing wind gusts
in excess of 70 mph and hail 2 inches in diameter, along with a few
tornadoes.

.DAYS TWO THROUGH SEVEN...Monday through Saturday.

There is a slight risk (level 2 out of 5) for scattered severe
storms Monday evening. These storms will be capable of producing
wind gusts of 70 mph and hail 2 inches in diameter.

.SPOTTER INFORMATION STATEMENT...

Spotter activation may be requested. Weather spotters are encouraged
to submit reports to the National Weather Service in Aberdeen. The
public can submit reports on our web page, Facebook page, or our X
feed.

SDZ033-035>037-045-048-051-282030-
Stanley-Hughes-Hyde-Hand-Jones-Lyman-Buffalo-
323 PM CDT Sun Jul 27 2025 /223 PM MDT Sun Jul 27 2025/

This Hazardous Weather Outlook is for central South Dakota.

.DAY ONE...This afternoon and tonight.

A heat advisory will be in effect until 8 PM CDT for heat index
values up to 104 degrees F.

.DAYS TWO THROUGH SEVEN...Monday through Saturday.

A heat advisory will be in effect on Monday from 1 PM to 8 PM CDT
for heat index values up to 106 degrees.

There is a slight risk (level 2 out of 5) for scattered severe
storms Monday evening. These storms will be capable of producing
wind gusts of 70 mph and hail 2 inches in diameter.

.SPOTTER INFORMATION STATEMENT...

Spotter activation may be requested. Weather spotters are encouraged
to submit reports to the National Weather Service in Aberdeen. The
public can submit reports on our web page, Facebook page, or our X
feed.

10

In the hours before

Local storm report, Jul 27, 6:04 PM CDT, 15 minutes before
Preliminary Local Storm Report
National Weather Service Aberdeen SD
604 PM CDT Sun Jul 27 2025

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0558 PM     Tornado          7 NE Henry              44.95N 97.37W
07/27/2025                   Codington          SD   Storm Chaser

            Several storm chasers have reported a
            tornado.

&&

sd

The office that day

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

IssuedProductOfficeCountiesLasted
Jul 26, 7:10 PM CDTSevere Thunderstorm Warning Considerable damage threatABRDewey, Stanley65 min
Jul 26, 7:12 PM CDTSevere Thunderstorm Warning Considerable damage threatABRDewey46 min
Jul 26, 7:42 PM CDTSevere Thunderstorm Warning Considerable damage threatABRCorson, Dewey, Walworth16 min
Jul 26, 8:11 PM CDTSevere Thunderstorm Warning Considerable damage threatABRDewey, Potter, Stanley, Sully49 min
Jul 26, 8:21 PM CDTAreal Flood WarningABRDewey3 hr
Jul 26, 8:44 PM CDTSevere Thunderstorm WarningABRDewey, Potter, Sully, Walworth46 min
Jul 26, 9:25 PM CDTSpecial Weather StatementABRPotter35 min
Jul 26, 9:58 PM CDTSevere Thunderstorm WarningABRHand, Hyde, Spink62 min
Jul 26, 10:15 PM CDTSevere Thunderstorm WarningABRFaulk, Hand, Hyde45 min
Jul 26, 10:34 PM CDTSevere Thunderstorm WarningABRHand26 min
Jul 26, 11:26 PM CDTSpecial Weather StatementABRBrown34 min
Jul 27, 2:26 AM CDTSpecial Weather StatementABRCorson34 min
Jul 27, 11:49 AM CDTSevere Thunderstorm WarningABRGrant41 min
Jul 27, 2:01 PM CDTHeat AdvisoryABRBuffalo, Hand, Hughes, Hyde, Jones, Lyman and 1 more29 hr
Jul 27, 4:25 PM CDTSevere Thunderstorm WarningABRRoberts50 min
Jul 27, 5:54 PM CDTTornado WarningABRCodington36 min
Jul 27, 6:47 PM CDTTornado WarningABRCodington, Hamlin31 min
Jul 27, 3:58 PM CDTSevere Thunderstorm WarningABRTraverse20 min
Jul 27, 4:11 PM CDTSevere Thunderstorm WarningABRBig Stone, Traverse19 min
Jul 27, 5:11 PM CDTSevere Thunderstorm WarningABRBig Stone22 min
Jul 27, 5:32 PM CDTSevere Thunderstorm WarningABRBig Stone, Traverse43 min
Jul 27, 6:12 PM CDTSevere Thunderstorm WarningABRBig Stone, Traverse48 min
Jul 27, 6:41 PM CDTAreal Flood WarningABRBig Stone, Traverse6 hr
Jul 27, 6:54 PM CDTSevere Thunderstorm WarningABRBig Stone, Traverse51 min

Nearby

Severe Thunderstorm Warnings in South Dakota, 2025Every severe thunderstorm 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.