Alert archive / South Dakota / Tornado Warnings in 2026

Tornado Warning 21, NWS Sioux Falls, SD

May 31, 2026Turner County, South Dakota

NWS Sioux Falls, SD issued this tornado warning at May 31, 2026, 7:50 PM CDT for Turner County, South Dakota. It was in force for 40 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 31, 2026, 7:50 PM CDT (00:50 UTC)
Expired: May 31, 2026, 8:30 PM CDT
In force: 40 min
Issued by: NWS Sioux Falls, SD
Area: Storm-based polygon
Tornado: Radar indicated
Hail: 1.0 in

County Turner County, SD

The radar

The Sioux Falls radar (KFSD), 50 km from the middle of the area, began a volume at 00:49 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 31, 7:54 PM CDT	HAIL 1	2 Wnw Davis, SD

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

The nearest sounding before it

Aberdeen, SD (KABR), launched 00:00Z, 0.8 hours before the alert went out and 215 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: 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

Open this sounding in Storm Lab

The text

As transmitted.

283 
WFUS53 KFSD 010050
TORFSD
SDC125-010130-
/O.NEW.KFSD.TO.W.0021.260601T0050Z-260601T0130Z/

BULLETIN - EAS ACTIVATION REQUESTED
Tornado Warning
National Weather Service Sioux Falls SD
750 PM CDT Sun May 31 2026

The National Weather Service in Sioux Falls has issued a

* Tornado Warning for...
  Southeastern Turner County in southeastern South Dakota...

* Until 830 PM CDT.

* At 750 PM CDT, a severe thunderstorm capable of producing a tornado
  was located over Viborg, or 13 miles south of Parker, moving
  northeast at 10 mph.

  HAZARD...Tornado and quarter size hail.

  SOURCE...Radar indicated rotation.

  IMPACT...Flying debris will be dangerous to those caught without 
           shelter. Mobile homes will be damaged or destroyed. 
           Damage to roofs, windows, and vehicles will occur.  Tree 
           damage is likely.

* This dangerous storm will be near...
  Hurley around 755 PM CDT.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

TAKE COVER NOW! Move to a basement or an interior room on the lowest
floor of a sturdy building. Avoid windows. If you are outdoors, in a
mobile home, or in a vehicle, move to the closest substantial shelter
and protect yourself from flying debris.

&&

LAT...LON 4316 9708 4319 9719 4330 9710 4327 9693
TIME...MOT...LOC 0050Z 218DEG 8KT 4320 9712 

TORNADO...RADAR INDICATED
MAX HAIL SIZE...1.00 IN

$$

SG

2 follow-up statements

162 
WWUS53 KFSD 010109
SVSFSD

Severe Weather Statement
National Weather Service Sioux Falls SD
809 PM CDT Sun May 31 2026

SDC125-010130-
/O.CON.KFSD.TO.W.0021.000000T0000Z-260601T0130Z/
Turner SD-
809 PM CDT Sun May 31 2026

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 830 PM CDT FOR
SOUTHEASTERN TURNER COUNTY...

At 809 PM CDT, a severe thunderstorm capable of producing a tornado
was located over Viborg, or 14 miles south of Parker, moving
northeast at 10 mph.

HAZARD...Tornado and quarter size hail.

SOURCE...Radar indicated rotation.

IMPACT...Flying debris will be dangerous to those caught without 
         shelter. Mobile homes will be damaged or destroyed. Damage 
         to roofs, windows, and vehicles will occur.  Tree damage is 
         likely.

Locations impacted include...
  Davis.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

TAKE COVER NOW! Move to a basement or an interior room on the lowest
floor of a sturdy building. Avoid windows. If you are outdoors, in a
mobile home, or in a vehicle, move to the closest substantial shelter
and protect yourself from flying debris.

&&

LAT...LON 4317 9706 4320 9712 4329 9704 4327 9693
TIME...MOT...LOC 0109Z 232DEG 7KT 4320 9705 

TORNADO...RADAR INDICATED
MAX HAIL SIZE...1.00 IN

$$

SG

141 
WWUS53 KFSD 010123
SVSFSD

Severe Weather Statement
National Weather Service Sioux Falls SD
823 PM CDT Sun May 31 2026

SDC125-010132-
/O.EXP.KFSD.TO.W.0021.000000T0000Z-260601T0130Z/
Turner SD-
823 PM CDT Sun May 31 2026

...THE TORNADO WARNING FOR SOUTHEASTERN TURNER COUNTY WILL EXPIRE AT
830 PM CDT...

The storm which prompted the warning has weakened below severe
limits, and no longer appears capable of producing a tornado.
Therefore, the warning will be allowed to expire.

A Severe Thunderstorm Watch remains in effect until 100 AM CDT for
southeastern South Dakota.

To report severe weather, contact your nearest law enforcement
agency. They will relay your report to the National Weather Service
Sioux Falls.

Remember, a Severe Thunderstorm Warning still remains in effect for 
northwestern Lincoln and southeastern Turner counties untili 915 PM 
CDT.

&&

LAT...LON 4317 9706 4320 9712 4329 9704 4327 9693
TIME...MOT...LOC 0122Z 218DEG 8KT 4322 9703 

$$

BP

The office that day

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

Issued	Product	Office	Counties	Lasted
May 31, 7:06 PM CDT	Tornado Warning	FSD	McCook, Minnehaha	39 min
May 31, 7:08 PM CDT	Severe Thunderstorm Warning	FSD	McCook, Minnehaha	52 min
May 31, 7:23 PM CDT	Severe Thunderstorm Warning	FSD	Lincoln, Turner	52 min
May 31, 7:42 PM CDT	Tornado Warning	FSD	McCook, Minnehaha	23 min
May 31, 7:54 PM CDT	Severe Thunderstorm Warning	FSD	Minnehaha	51 min
May 31, 8:03 PM CDT	Tornado Warning	FSD	Minnehaha	42 min
May 31, 8:21 PM CDT	Severe Thunderstorm Warning	FSD	Lincoln, Turner	54 min
May 31, 8:29 PM CDT	Tornado Warning	FSD	Lincoln, Turner	46 min
May 31, 8:42 PM CDT	Severe Thunderstorm Warning	FSD	Clay, Lincoln, Turner, Yankton	63 min
May 31, 8:43 PM CDT	Tornado Warning	FSD	Minnehaha	32 min
May 31, 8:57 PM CDT	Tornado Warning Tornado observed	FSD	Lincoln, Turner	35 min
May 31, 9:11 PM CDT	Tornado Warning	FSD	Clay, Union	49 min
May 31, 9:43 PM CDT	Severe Thunderstorm Warning	FSD	Clay, Union	47 min
May 31, 11:08 PM CDT	Severe Thunderstorm Warning	FSD	Union	52 min

Nearby

Tornado Warnings in South Dakota, 2026 Every tornado warning in 2026 Tornadoes 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.