Alert archive / South Dakota / Severe Thunderstorm Warnings in 2025

Severe Thunderstorm Warning 232, NWS Aberdeen, SD

August 16, 2025Edmunds County, McPherson County, South Dakota

NWS Aberdeen, SD issued this severe thunderstorm warning at Aug 16, 2025, 2:33 AM CDT for Edmunds County, McPherson County, South Dakota. It was in force for 44 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: Aug 16, 2025, 2:33 AM CDT (07:33 UTC)
Expired: Aug 16, 2025, 3:17 AM CDT
In force: 44 min
Issued by: NWS Aberdeen, SD
Area: Storm-based polygon
Hail: 1.25 in
Wind: 60.0 mph

Counties Edmunds County, SD, McPherson County, SD

The radar

The Aberdeen radar (KABR), 65 km from the middle of the area, began a volume at 07:35 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
Aug 15, 11:58 PM CDT	Severe Thunderstorm Watch	SPC	6 hr

The nearest sounding before it

Aberdeen, SD (KABR), launched 00:00Z, 7.6 hours before the alert went out and 100 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-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

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: 1951 J/kg
Mixed-layer CIN: -139 J/kg
Mixed-layer LCL: 944 m above ground
0-6 km bulk shear: 40 kt
0-1 km storm-relative helicity: 92 m²/s²
0-3 km storm-relative helicity: 224 m²/s²
Significant tornado parameter: 0.6
Supercell composite: 8.9

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 Aug 16, 2:06 AM CDT, 27 minutes earlier.

Area forecast discussion, Aug 16, 2:06 AM CDT, 27 minutes before

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Hazardous weather outlook, Aug 15, 9:29 AM CDT, 17 hours 4 minutes before

Hazardous Weather Outlook...UPDATED
National Weather Service Aberdeen SD
929 AM CDT Fri Aug 15 2025

MNZ046-SDZ008-011-018>023-033-035>037-045-048-051-161430-
Big Stone-Roberts-Day-Spink-Clark-Codington-Grant-Hamlin-Deuel-
Stanley-Hughes-Hyde-Hand-Jones-Lyman-Buffalo-
929 AM CDT Fri Aug 15 2025 /829 AM MDT Fri Aug 15 2025/

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

.DAY ONE...Today and tonight.

A slight risk, or level 2 out of 5, is posted for severe storms
mainly for this evening through the overnight hours. Damaging winds
up to and in excess of 60 mph and large hail 1 inch or greater in
diameter will be the main threats along with locally heavy rainfall.

.DAYS TWO THROUGH SEVEN...Saturday through Thursday.

A marginal risk, or level 1 out of 5, is in place for severe storms
Saturday and again Sunday. Main threats will be damaging winds to
around 60 mph and large hail to around 1 inch 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-SDZ003>007-009-010-015>017-034-161430-
Traverse-Corson-Campbell-McPherson-Brown-Marshall-Walworth-Edmunds-
Dewey-Potter-Faulk-Sully-
929 AM CDT Fri Aug 15 2025 /829 AM MDT Fri Aug 15 2025/

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

.DAY ONE...Today and tonight.

A marginal risk for severe storms, or level 1 out of 5, of severe
storms tonight. The strongest storms will be capable of producing
winds to around 60 mph and hail to around 1 inch in diameter.

.DAYS TWO THROUGH SEVEN...Saturday through Thursday.

A marginal risk, or level 1 out of 5, is in place for severe storms
Saturday and again Sunday. Main threats will be damaging winds to
around 60 mph and large hail to around 1 inch 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.

In the hours before

Special weather statement, Aug 16, 12:04 AM CDT, 2 hours 29 minutes before

Special Weather Statement
National Weather Service Aberdeen SD
1204 AM CDT Sat Aug 16 2025

SDZ045-160530-
Jones SD-
1204 AM CDT Sat Aug 16 2025

...A STRONG THUNDERSTORM WILL IMPACT JONES COUNTY THROUGH 1230 AM
CDT...

At 1204 AM CDT, Doppler radar was tracking a strong thunderstorm near
Okaton, or near Murdo, moving east at 50 mph.

HAZARD...Wind gusts up to 50 mph and penny size hail.

SOURCE...Radar indicated.

IMPACT...Gusty winds could knock down tree limbs and blow around
         unsecured objects. Minor hail damage to vegetation is
         possible.

Locations impacted include...
Murdo, Draper, and Okaton.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If outdoors, consider seeking shelter inside a building.

A Severe Thunderstorm Watch remains in effect until 300 AM CDT for
central South Dakota.

&&

LAT...LON 4380 10088 4379 10090 4380 10091 4381 10090
      4383 10093 4381 10095 4385 10099 4384 10103
      4386 10103 4386 10106 4398 10107 4400 10105
      4407 10104 4415 10041 4396 10037 4385 10037
      4384 10034 4379 10087
TIME...MOT...LOC 0504Z 247DEG 44KT 4392 10081

MAX HAIL SIZE...0.75 IN
MAX WIND GUST...50 MPH

20

Local storm report, Aug 16, 2:03 AM CDT, 30 minutes before

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Local storm report, Aug 16, 2:09 AM CDT, 24 minutes before

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Special weather statement, Aug 16, 2:25 AM CDT, 8 minutes before

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The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 16, 12:04 AM CDT	Special Weather Statement	ABR	Jones	26 min
Aug 16, 12:15 AM CDT	Severe Thunderstorm Warning	ABR	Jones, Lyman, Stanley	60 min
Aug 16, 12:55 AM CDT	Severe Thunderstorm Warning	ABR	Buffalo, Jones, Lyman	65 min
Aug 16, 1:51 AM CDT	Severe Thunderstorm Warning Considerable damage threat	ABR	Buffalo, Lyman	69 min
Aug 16, 2:25 AM CDT	Special Weather Statement	ABR	Campbell	35 min
Aug 16, 2:42 AM CDT	Special Weather Statement	ABR	Hand	33 min
Aug 16, 2:55 AM CDT	Areal Flood Warning	ABR	Buffalo, Lyman	10 hr
Aug 16, 3:08 AM CDT	Severe Thunderstorm Warning	ABR	Hamlin	67 min
Aug 16, 3:26 AM CDT	Special Weather Statement	ABR	Deuel	34 min
Aug 16, 3:39 AM CDT	Severe Thunderstorm Warning	ABR	Deuel	51 min
Aug 16, 3:57 AM CDT	Severe Thunderstorm Warning	ABR	Clark, Codington, Deuel, Hamlin	48 min
Aug 16, 4:30 AM CDT	Severe Thunderstorm Warning Considerable damage threat	ABR	Codington, Day, Deuel, Grant, Roberts	60 min
Aug 16, 5:14 AM CDT	Special Weather Statement	ABR	Brown	31 min
Aug 16, 5:37 AM CDT	Special Weather Statement	ABR	Day	23 min
Aug 16, 5:53 AM CDT	Special Weather Statement	ABR	Day	37 min
Aug 16, 5:54 AM CDT	Special Weather Statement	ABR	Day	36 min

Nearby

Severe Thunderstorm Warnings in South Dakota, 2025 Every 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.