Alert archive / South Dakota / Severe Thunderstorm Warnings in 2026
Severe Thunderstorm Warning 9, NWS Aberdeen, SD
NWS Aberdeen, SD issued this severe thunderstorm warning at May 31, 2026, 7:14 PM CDT for Edmunds County, McPherson County, South Dakota. It was in force for 23 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
- May 31, 2026, 7:14 PM CDT (00:14 UTC)
- Expired
- May 31, 2026, 7:37 PM CDT
- In force
- 23 min
- Issued by
- NWS Aberdeen, SD
- Area
- Storm-based polygon
- Hail
- 1.0 in
- Wind
- 50.0 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 00:18 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 nearest sounding before it
Aberdeen, SD (KABR), launched 00:00Z, 0.2 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.
- Mixed-layer CAPE
- 1517 J/kg
- Mixed-layer CIN
- -19 J/kg
- Mixed-layer LCL
- 1020 m above ground
- 0-6 km bulk shear
- 16 kt
- 0-1 km storm-relative helicity
- 120 m²/s²
- 0-3 km storm-relative helicity
- 168 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
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 May 31, 6:23 PM CDT, 51 minutes earlier.
Area forecast discussion, May 31, 6:23 PM CDT, 51 minutes before
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</html>Hazardous weather outlook, May 31, 1:32 PM CDT, 5 hours 42 minutes before
Hazardous Weather Outlook National Weather Service Aberdeen SD 132 PM CDT Sun May 31 2026 SDZ003>011-015>023-033>037-045-048-051-011845- Corson-Campbell-McPherson-Brown-Marshall-Roberts-Walworth-Edmunds- Day-Dewey-Potter-Faulk-Spink-Clark-Codington-Grant-Hamlin-Deuel- Stanley-Sully-Hughes-Hyde-Hand-Jones-Lyman-Buffalo- 132 PM CDT Sun May 31 2026 /1232 PM MDT Sun May 31 2026/ This Hazardous Weather Outlook is for central South Dakota, north central South Dakota and northeast South Dakota. .DAY ONE...This afternoon and tonight. A Marginal Risk (Level 1 of 5) for severe weather is in effect for this afternoon through late this evening. Damaging wind gusts of 60 mph and hail of 1 inch in diameter are the main threats. Brief heavy downpours are a secondary threat. .DAYS TWO THROUGH SEVEN...Monday through Saturday. A Slight Risk (Level 2 of 5) for severe weather is in effect Tuesday for locations along and west of the Missouri River. A Marginal Risk (Level 1 out of 5) for severe storms is in effect for locations between the Missouri and James River. Large hail (1"+ in diameter) and wind gusts of 60+ mph are the main threats. .SPOTTER INFORMATION STATEMENT... Spotter activation is not expected at this time. MNZ039-046-011845- Traverse-Big Stone- 132 PM CDT Sun May 31 2026 This Hazardous Weather Outlook is for west central Minnesota. .DAY ONE...This afternoon and tonight. Isolated to scattered thunderstorms are possible late this afternoon through early tonight. While no severe weather is anticipated, lightning will be the main threat. Small hail less then 1" in diameter is possible along with wind gusts to 50 mph in any stronger storm. .DAYS TWO THROUGH SEVEN...Monday through Saturday. No hazardous weather is expected at this time. .SPOTTER INFORMATION STATEMENT... Spotter activation is not expected at this time.
In the hours before
Special weather statement, May 31, 4:12 PM CDT, 3 hours 2 minutes before
Special Weather Statement National Weather Service Aberdeen SD 412 PM CDT Sun May 31 2026 SDZ010-312145- Edmunds SD- 412 PM CDT Sun May 31 2026 ...A STRONG THUNDERSTORM WILL IMPACT CENTRAL EDMUNDS COUNTY THROUGH 445 PM CDT... At 411 PM CDT, Doppler radar was tracking a strong thunderstorm near Loyalton, or 7 miles southeast of Roscoe, moving north at 15 mph. HAZARD...Nickel size hail. SOURCE...Radar indicated. IMPACT...Minor hail damage to vegetation is possible. This storm will remain over mainly rural areas of central Edmunds County. PRECAUTIONARY/PREPAREDNESS ACTIONS... If outdoors, consider seeking shelter inside a building. && LAT...LON 4532 9919 4532 9928 4547 9933 4547 9914 TIME...MOT...LOC 2111Z 180DEG 14KT 4537 9924 MAX HAIL SIZE...0.88 IN MAX WIND GUST...<30 MPH 20
Local storm report, May 31, 4:45 PM CDT, 2 hours 29 minutes before
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</html>Local storm report, May 31, 4:57 PM CDT, 2 hours 17 minutes before
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</html>Local storm report, May 31, 6:39 PM CDT, 35 minutes before
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</html>Local storm report, May 31, 7:07 PM CDT, 7 minutes before
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</html>The office that day
Everything else NWS Aberdeen, SD issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 31, 7:10 PM CDT | Flash Flood Warning | ABR | McPherson | 3 hr |
| May 31, 7:40 PM CDT | Severe Thunderstorm Warning | ABR | Brown, McPherson | 20 min |
| May 31, 9:33 PM CDT | Severe Thunderstorm Warning | ABR | Brown | 42 min |
| May 31, 9:43 PM CDT | Areal Flood Warning | ABR | McPherson | 20 hr |
Nearby
Severe Thunderstorm Warnings in South Dakota, 2026Every severe thunderstorm warning in 2026
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.