Alert archive / South Dakota / Severe Thunderstorm Warnings in 2026
Severe Thunderstorm Warning 68, NWS Sioux Falls, SD
NWS Sioux Falls, SD issued this severe thunderstorm warning at May 24, 2026, 9:24 PM CDT for Lincoln County, Minnehaha County, Turner County, South Dakota. It was in force for 51 min. 1 report came from inside the area while it was in force.
The area
The outline as issued, with what was reported inside it.
The facts
- Issued
- May 24, 2026, 9:24 PM CDT (02:24 UTC)
- Expired
- May 24, 2026, 10:15 PM CDT
- In force
- 51 min
- Issued by
- NWS Sioux Falls, SD
- Area
- Storm-based polygon
- Hail
- 1.5 in
- Wind
- 60.0 mph
Counties Lincoln County, SD, Minnehaha County, SD, Turner County, SD
The radar
The Sioux Falls radar (KFSD), 41 km from the middle of the area, began a volume at 02:26 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 was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| May 24, 9:38 PM CDT | HAIL 1 | 2 Se Parker, SD | Report from social media. Time estimated by radar. |
Local storm reports filed while the alert was in force, from inside its polygon or its counties.
Did it verify
Verified. The Iowa Environmental Mesonet's Cow matched one storm report to this severe thunderstorm warning; the first came 14 minutes after it went out.
Cow counts a report within 15 km of the polygon while the warning was in force: a tornado for a tornado warning; hail of 1 inch or more, a gust of 58 mph or more or wind damage for a severe thunderstorm warning; a flash flood report for a flash flood warning.
The watch it was issued in
The SPC watch in force over the same counties when this warning went out.
| Issued | Product | Office | Lasted |
|---|---|---|---|
| May 24, 4:53 PM CDT | Severe Thunderstorm Watch | SPC | 6 hr |
The nearest sounding before it
Aberdeen, SD (KABR), launched 00:00Z, 2.4 hours before the alert went out and 200 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
- 29 J/kg
- Mixed-layer CIN
- -28 J/kg
- Mixed-layer LCL
- 3042 m above ground
- 0-6 km bulk shear
- 30 kt
- 0-1 km storm-relative helicity
- 48 m²/s²
- 0-3 km storm-relative helicity
- 115 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.1
The text
As transmitted.
939
WUUS53 KFSD 250224
SVRFSD
SDC083-099-125-250315-
/O.NEW.KFSD.SV.W.0068.260525T0224Z-260525T0315Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Sioux Falls SD
924 PM CDT Sun May 24 2026
The National Weather Service in Sioux Falls has issued a
* Severe Thunderstorm Warning for...
South central Minnehaha County in southeastern South Dakota...
Northwestern Lincoln County in southeastern South Dakota...
Northern Turner County in southeastern South Dakota...
* Until 1015 PM CDT.
* At 923 PM CDT, a severe thunderstorm was located over Parker,
moving east at 30 mph.
HAZARD...Ping pong ball size hail and 60 mph wind gusts.
SOURCE...Radar indicated.
IMPACT...People and animals outdoors will be injured. Expect hail
damage to roofs, siding, windows, and vehicles. Expect
wind damage to roofs, siding, and trees.
* This severe thunderstorm will be near...
Parker, Hurley, and Chancellor around 930 PM CDT.
Lennox around 935 PM CDT.
Other locations in the path of this severe thunderstorm include Tea
and Wall Lake.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
To report severe weather, contact your nearest law enforcement
agency. They will send your report to the National Weather Service
office in Sioux Falls.
&&
LAT...LON 4327 9730 4339 9737 4356 9688 4330 9676
TIME...MOT...LOC 0223Z 254DEG 26KT 4338 9718
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...1.50 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH
$$
Samet2 follow-up statements
375
WWUS53 KFSD 250239
SVSFSD
Severe Weather Statement
National Weather Service Sioux Falls SD
939 PM CDT Sun May 24 2026
SDC083-099-125-250315-
/O.CON.KFSD.SV.W.0068.000000T0000Z-260525T0315Z/
Minnehaha SD-Lincoln SD-Turner SD-
939 PM CDT Sun May 24 2026
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 1015 PM CDT
FOR SOUTH CENTRAL MINNEHAHA...NORTHWESTERN LINCOLN AND NORTHEASTERN
TURNER COUNTIES...
At 938 PM CDT, a severe thunderstorm was located near Chancellor, or
near Parker, moving east at 30 mph.
HAZARD...Golf ball size hail and 60 mph wind gusts.
SOURCE...Law enforcement. At 905 PM, ping pong ball sized hail was
reported in Freeman, SD.
IMPACT...People and animals outdoors will be injured. Expect hail
damage to roofs, siding, windows, and vehicles. Expect wind
damage to roofs, siding, and trees.
Locations impacted include...
Tea, Lennox, Wall Lake, Chancellor and Worthing.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
To report severe weather contact your nearest law enforcement agency.
They will send your report to the National Weather Service office in
Sioux Falls.
&&
LAT...LON 4330 9719 4342 9728 4356 9688 4330 9676
TIME...MOT...LOC 0238Z 254DEG 25KT 4340 9704
THUNDERSTORM DAMAGE THREAT...CONSIDERABLE
HAIL THREAT...OBSERVED
MAX HAIL SIZE...1.75 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH
$$
Samet111
WWUS53 KFSD 250256
SVSFSD
Severe Weather Statement
National Weather Service Sioux Falls SD
956 PM CDT Sun May 24 2026
SDC083-099-125-250315-
/O.CON.KFSD.SV.W.0068.000000T0000Z-260525T0315Z/
Minnehaha SD-Lincoln SD-Turner SD-
956 PM CDT Sun May 24 2026
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 1015 PM CDT
FOR SOUTH CENTRAL MINNEHAHA...NORTHWESTERN LINCOLN AND NORTHEASTERN
TURNER COUNTIES...
At 955 PM CDT, a severe thunderstorm was located over Chancellor, or
near Parker, moving east at 20 mph.
HAZARD...Golf ball size hail and 60 mph wind gusts.
SOURCE...Law enforcement. At 905 PM, ping pong ball sized hail was
reported in Freeman, SD.
IMPACT...People and animals outdoors will be injured. Expect hail
damage to roofs, siding, windows, and vehicles. Expect wind
damage to roofs, siding, and trees.
Locations impacted include...
Parker, Tea, Lennox, Wall Lake, Worthing, and Chancellor.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
To report severe weather contact your nearest law enforcement agency.
They will send your report to the National Weather Service office in
Sioux Falls.
&&
LAT...LON 4330 9707 4345 9718 4356 9688 4330 9676
TIME...MOT...LOC 0255Z 257DEG 19KT 4340 9701
THUNDERSTORM DAMAGE THREAT...CONSIDERABLE
HAIL THREAT...OBSERVED
MAX HAIL SIZE...1.75 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH
$$
SametWhat 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 May 24, 6:34 PM CDT, 2 hours 50 minutes earlier. Its key messages:
- Isolated to scattered thunderstorms possible during the late afternoon through early overnight hours (5pm-11pm) east of Highway 281. Primary risks of 2 inch hail and 65 mph winds.
- Isolated to scattered thunderstorms may redevelop Monday evening into Monday night over NW Iowa and NE Nebraska. Non- zero severe weather risks may bring gusty winds and hail.
- Temperatures remain 10+ degrees above normal into mid-week, but expect a slight cooldown back to normals by next weekend.
- Rain risks return Friday into next weekend (20-40%), however severe weather chances are very low.
Area forecast discussion, May 24, 6:34 PM CDT, 2 hours 50 minutes before
Area Forecast Discussion National Weather Service Sioux Falls SD 634 PM CDT Sun May 24 2026 .KEY MESSAGES... - Isolated to scattered thunderstorms possible during the late afternoon through early overnight hours (5pm-11pm) east of Highway 281. Primary risks of 2 inch hail and 65 mph winds. - Isolated to scattered thunderstorms may redevelop Monday evening into Monday night over NW Iowa and NE Nebraska. Non- zero severe weather risks may bring gusty winds and hail. - Temperatures remain 10+ degrees above normal into mid-week, but expect a slight cooldown back to normals by next weekend. - Rain risks return Friday into next weekend (20-40%), however severe weather chances are very low. && .DISCUSSION... Issued at 1211 PM CDT Sun May 24 2026 THIS AFTERNOON/EVENING: Temperatures continue to rise towards and into the 80s this afternoon. Initial mid-lvl vorticity tracking across South Dakota this morning will keep a narrow channel AC focused along the Ridge and Minnesota River valley early this afternoon. Increasing southwesterly surface flow will continue to pull modest boundary layer moisture northward, but some of the high-res CAMs are overdoing current moisture at mid-day. Nevertheless, we should eventually see more consistent mid/upr-50 dew points arrive by late afternoon. The arrival of slightly enhanced mid-lvl lapse rates will push MLCAPE values towards the 1500-2200 J/KG layer by late afternoon. The main question will then become "where does initiation occur?". Some preference today for a weak area of surface convergence and low- lvl jet convergence towards the Highway 14 corridor and into the Minnesota River valley after 4pm. With inhibition weakened further south towards the MO River, additional isolated/scattered development could take place by early evening further west along a weak dry line near the James River valley, but this development is much less certain and more conditional based on weaker convergence. It's the arrival of mid-lvl vorticity in the 00-03Z window that may help development further develop and linger into the early overnight hours before low- lvl flow veers and pushes convection eastward. Regarding hazards, the increase in effective shear towards the 30-40 knot mark support a few supercells, with analogs suggesting 1.5-2" hail potential. A few wind gusts to 60-70 mph may be possible given steep low-lvl lapse rates, but only modest DCAPE. The tornado risk remains very low. The west-east slow storm movement through the Highway 14 corridor this evening could lead lead to minor flash flood risks with HREF PMM data suggesting 1-2" per hour rates. Storm risks lower quickly after midnight with a quiet remaining overnight forecast. MEMORIAL DAY: Even warmer temperatures are expected for Memorial day as winds remain southwesterly. Highs are expected to rise into the upper 80s to lower 90s. One thing to note will be a rise in afternoon dewpoints towards the lower 60s that may push heat index values into the 90s. Will also need to monitor the potential for isolated convection to form Monday evening across portions of north central/northwestern Iowa into northeastern Nebraska, given the slightly dirty mid-lvl flow remaining in the Plains. Several CAMS (more NAM based), all suggest low-end development by late afternoon to early evening, potentially driven by weak low-lvl convergence on the developing LLJ. Shear remains rather weak but instability and mid-lvl lapse rates of more than sufficient. Could see a few stronger storms with localized downburst winds and severe hail if trigger mechanism can be determined. This activity may quickly weaken after sunset, but continue to drift north into the overnight hours. TUESDAY-THURSDAY: The middle of the week favors dry and mild conditions as a mid-lvl ridge builds through the Plains and extends northward into Central Canada. Residing under the ridge of this quasi-blocking pattern would suggest very weak flow aloft, a slight influence from east southeasterly surface winds, and dry conditions with afternoon CU. FRIDAY-SUNDAY: A broad mid-lvl ridge over the CONUS remains in place through next weekend. However, we begin to see eastward shifts in the the dominant surface high over the Great Lakes, allowing a better channel of low-lvl moisture to move through the Mid/Upr MO river valley. What develops is a nearly daily low (20-40%) risk for shower and thunderstorms, mostly within the peak diurnal timeframe. Shear and instability in this pattern will be quite weak, so non- severe thunderstorms are favored. Temperatures are also favored to drop closer to seasonal average in the middle to upper 70s. && .AVIATION /00Z TAFS THROUGH 00Z TUESDAY/... Issued at 634 PM CDT Sun May 24 2026 Showers and thunderstorms have developed across the area late this afternoon. The storms currently extend along a line approximately from KMML down through about KAGZ. Some of these storms are produce large hail and strong winds. These storms will continue to track to the east and look to make it through the KFSD terminal area. A little uncertainty remains for KSUX as drier air my prevent storms from making it KSUX but did include a PROB30 group anyway. Should see thunderstorms chances wane towards midnight or so. After that, quiet conditions and southerly winds will persist through the night. Winds will turn southeasterly for the day tomorrow with gusts up to 20-25 knots. There could be additional storm that develop after the TAF period ends. && .FSD WATCHES/WARNINGS/ADVISORIES... SD...None. MN...None. IA...None. NE...None. && DISCUSSION...Dux AVIATION...Meyers
Hazardous weather outlook, May 24, 12:27 PM CDT, 8 hours 57 minutes before
Hazardous Weather Outlook National Weather Service Sioux Falls SD 1227 PM CDT Sun May 24 2026 IAZ001>003-012>014-020>022-031-032-MNZ071-072-080-081-089-090-097- 098-NEZ013-014-SDZ039-040-054>056-060>062-065>071-251730- Lyon-Osceola-Dickinson-Sioux-O'Brien-Clay-Plymouth-Cherokee- Buena Vista-Woodbury-Ida-Lincoln-Murray-Cottonwood-Nobles-Jackson- Pipestone-Rock-Dixon-Dakota-Kingsbury-Brookings-Miner-Lake-Moody- Hanson-McCook-Minnehaha-Hutchinson-Turner-Bon Homme-Yankton-Union- 1227 PM CDT Sun May 24 2026 This Hazardous Weather Outlook is for northwest Iowa, west central Iowa, southwest Minnesota, northeast Nebraska, east central South Dakota and southeast South Dakota. .DAY ONE...This afternoon and tonight. Isolated to scattered strong to severe storms are possible after 5pm this afternoon and may continue through 11pm. The primary threats will be large hail up to 2 inch hail and 65 mph wind gusts. .DAYS TWO THROUGH SEVEN...Monday through Saturday. Scattered thunderstorms may again be possible Monday evening and overnight. While the risks for severe weather are low, a storm or two could produce marginally severe hail around 1 inch and brief 50 mph wind gusts. .SPOTTER INFORMATION STATEMENT... Spotter activation may be needed after 5pm and continuing through 11pm. SDZ038-050-052-053-057>059-063-064-251730- Beadle-Gregory-Jerauld-Sanborn-Brule-Aurora-Davison-Charles Mix- Douglas- 1227 PM CDT Sun May 24 2026 This Hazardous Weather Outlook is for central South Dakota, east central South Dakota, south central South Dakota and southeast South Dakota. .DAY ONE...This afternoon and tonight. Hazardous weather is not expected at this time. .DAYS TWO THROUGH SEVEN...Monday through Saturday. Additional showers and thunderstorms will be possible on Monday mainly east of I-29. .SPOTTER INFORMATION STATEMENT... Spotter activation is not expected at this time.
In the hours before
Local storm report, May 24, 7:07 PM CDT, 2 hours 17 minutes before
Preliminary Local Storm Report
National Weather Service Sioux Falls SD
707 PM CDT Sun May 24 2026
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0706 PM Hail 5 S Scotland 43.08N 97.72W
05/24/2026 M1.50 Inch Bon Homme SD NWS Employee
Off duty NSSL employee reported ping pong
ball size hail.
&&
MMLocal storm report, May 24, 7:10 PM CDT, 2 hours 14 minutes before
Preliminary Local Storm Report
National Weather Service Sioux Falls SD
710 PM CDT Sun May 24 2026
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0651 PM Hail 5 S Scotland 43.08N 97.72W
05/24/2026 M1.50 Inch Bon Homme SD NWS Employee
Corrects previous hail report from 5 S
Scotland. Off duty NSSL employee reported
ping pong ball size hail.
&&
MMLocal storm report, May 24, 7:24 PM CDT, 2 hours before
Preliminary Local Storm Report
National Weather Service Sioux Falls SD
724 PM CDT Sun May 24 2026
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0718 PM Hail 5 SSW Chandler 43.87N 95.99W
05/24/2026 M1.25 Inch Murray MN Trained Spotter
&&
MMLocal storm report, May 24, 7:50 PM CDT, 1 hour 34 minutes before
Preliminary Local Storm Report
National Weather Service Sioux Falls SD
750 PM CDT Sun May 24 2026
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0747 PM Hail 4 N Utica 43.03N 97.50W
05/24/2026 E1.00 Inch Yankton SD Emergency Mngr
&&
MMLocal storm report, May 24, 8:07 PM CDT, 1 hour 17 minutes before
Preliminary Local Storm Report
National Weather Service Sioux Falls SD
807 PM CDT Sun May 24 2026
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0801 PM Hail 3 ESE Menno 43.22N 97.51W
05/24/2026 E1.50 Inch Hutchinson SD Public
&&
MMLocal storm report, May 24, 8:33 PM CDT, 51 minutes before
Preliminary Local Storm Report
National Weather Service Sioux Falls SD
833 PM CDT Sun May 24 2026
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0810 PM Hail 5 WSW Mayfield 43.05N 97.40W
05/24/2026 E1.50 Inch Yankton SD Law Enforcement
&&
MMThe office that day
Everything else NWS Sioux Falls, SD issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 24, 7:13 PM CDT | Severe Thunderstorm Warning | FSD | Bon Homme, Yankton | 47 min |
| May 24, 7:39 PM CDT | Severe Thunderstorm Warning | FSD | Moody | 51 min |
| May 24, 7:57 PM CDT | Severe Thunderstorm Warning | FSD | Yankton | 48 min |
| May 24, 8:01 PM CDT | Severe Thunderstorm Warning | FSD | Hutchinson, Turner | 44 min |
| May 24, 8:37 PM CDT | Severe Thunderstorm Warning | FSD | Clay, Turner, Yankton | 38 min |
| May 24, 8:41 PM CDT | Severe Thunderstorm Warning | FSD | Hutchinson, Turner | 49 min |
| May 24, 10:04 PM CDT | Severe Thunderstorm Warning | FSD | McCook | 41 min |
| May 24, 10:10 PM CDT | Severe Thunderstorm Warning | FSD | Lincoln, Minnehaha, Turner | 50 min |
| May 24, 10:36 PM CDT | Severe Thunderstorm Warning | FSD | McCook, Minnehaha | 39 min |
| May 24, 10:42 PM CDT | Severe Thunderstorm Warning | FSD | Lincoln | 48 min |
| May 24, 11:29 PM CDT | Flash Flood Warning | FSD | Minnehaha | 72 min |
| May 24, 11:29 PM CDT | Severe Thunderstorm Warning | FSD | Lincoln, Minnehaha | 46 min |
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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.