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Severe Thunderstorm Warning 0035
Issued by the Sioux Falls Forecast Office

Action Issued Starts Expiration
New 2026-05-17 13:09:53 2026-05-17 13:09:00 2026-05-17 14:00:00
Continued 2026-05-17 13:29:24 2026-05-17 14:00:00
Continued 2026-05-17 13:38:24 2026-05-17 14:00:00
Continued 2026-05-17 13:49:54 2026-05-17 14:00:00
Expired 2026-05-17 13:57:24 2026-05-17 14:00:00


Action: New
Issued At: 2026-05-17 13:09:53

873 
WUUS53 KFSD 171809
SVRFSD
SDC053-171900-
/O.NEW.KFSD.SV.W.0035.260517T1809Z-260517T1900Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Sioux Falls SD
109 PM CDT Sun May 17 2026

The National Weather Service in Sioux Falls has issued a

* Severe Thunderstorm Warning for...
  Gregory County in south central South Dakota...

* Until 200 PM CDT.

* At 108 PM CDT, a severe thunderstorm was located 10 miles east of
  Wewela, or 12 miles northeast of Springview, moving northeast at 55
  mph.

  HAZARD...60 mph wind gusts and half dollar size hail.

  SOURCE...Radar indicated.

  IMPACT...Hail damage to vehicles is expected. Expect wind damage 
           to roofs, siding, and trees.

* This severe thunderstorm will be near...
  Burke, Gregory and Herrick around 125 PM CDT.

Other locations in the path of this severe thunderstorm include St.
Charles.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

For your protection move to an interior room on the lowest floor of a
building.

&&

LAT...LON 4340 9954 4344 9918 4301 9883 4299 9892
      4300 9953
TIME...MOT...LOC 1808Z 241DEG 47KT 4297 9958 

HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...1.25 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH

$$

Weisser


Action: Continued
Issued At: 2026-05-17 13:29:24

664 
WWUS53 KFSD 171829
SVSFSD

Severe Weather Statement
National Weather Service Sioux Falls SD
129 PM CDT Sun May 17 2026

SDC053-171900-
/O.CON.KFSD.SV.W.0035.000000T0000Z-260517T1900Z/
Gregory SD-
129 PM CDT Sun May 17 2026

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 200 PM CDT
FOR GREGORY COUNTY...

At 128 PM CDT, a severe thunderstorm was located near Burke, or 27
miles northeast of Springview, moving northeast at 45 mph.

HAZARD...60 mph wind gusts and quarter size hail.

SOURCE...Radar indicated.

IMPACT...Hail damage to vehicles is expected. Expect wind damage to 
         roofs, siding, and trees.

Locations impacted include...
  Burke and Herrick.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

For your protection move to an interior room on the lowest floor of a
building.

&&

LAT...LON 4340 9954 4344 9918 4301 9883 4299 9892
      4300 9953
TIME...MOT...LOC 1828Z 232DEG 37KT 4310 9936 

HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...1.00 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH

$$

Weisser


Action: Continued
Issued At: 2026-05-17 13:38:24

897 
WWUS53 KFSD 171838
SVSFSD

Severe Weather Statement
National Weather Service Sioux Falls SD
138 PM CDT Sun May 17 2026

SDC053-171900-
/O.CON.KFSD.SV.W.0035.000000T0000Z-260517T1900Z/
Gregory SD-
138 PM CDT Sun May 17 2026

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 200 PM CDT
FOR SOUTHWESTERN GREGORY COUNTY...

At 137 PM CDT, a severe thunderstorm was located over Herrick, or 31
miles northwest of Spencer, moving northeast at 45 mph.

HAZARD...60 mph wind gusts and quarter size hail.

SOURCE...Radar indicated.

IMPACT...Hail damage to vehicles is expected. Expect wind damage to 
         roofs, siding, and trees.

This severe storm will be near...
  Herrick and St. Charles around 145 PM CDT.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

For your protection move to an interior room on the lowest floor of a
building.

&&

LAT...LON 4335 9934 4338 9914 4301 9883 4299 9892
      4300 9953
TIME...MOT...LOC 1837Z 243DEG 38KT 4312 9922 

HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...1.00 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH

$$

Weisser


Action: Continued
Issued At: 2026-05-17 13:49:54

315 
WWUS53 KFSD 171849
SVSFSD

Severe Weather Statement
National Weather Service Sioux Falls SD
149 PM CDT Sun May 17 2026

SDC053-171900-
/O.CON.KFSD.SV.W.0035.000000T0000Z-260517T1900Z/
Gregory SD-
149 PM CDT Sun May 17 2026

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 200 PM CDT
FOR SOUTHWESTERN GREGORY COUNTY...

At 148 PM CDT, a severe thunderstorm was located near Burke, or 30 
miles west of Lake Andes, moving northeast at 40 mph.

HAZARD...60 mph wind gusts and half dollar size hail.

SOURCE...Radar indicated.

IMPACT...Hail damage to vehicles is expected. Expect wind damage to 
         roofs, siding, and trees.

This severe thunderstorm will remain over mainly rural areas of
southwestern Gregory County, including the following locations...
Fairfax.

At 140 pm...Half Dollar sized hail was reported in Burke.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Tornado Watch remains in effect until 1000 PM CDT for south central
South Dakota.

For your protection move to an interior room on the lowest floor of a
building.

&&

LAT...LON 4331 9932 4338 9914 4301 9883 4299 9892
      4300 9930
TIME...MOT...LOC 1848Z 232DEG 35KT 4320 9914 

HAIL THREAT...OBSERVED
MAX HAIL SIZE...1.25 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH

$$

Weisser


Action: Expired
Issued At: 2026-05-17 13:57:24

426 
WWUS53 KFSD 171856
SVSFSD

Severe Weather Statement
National Weather Service Sioux Falls SD
156 PM CDT Sun May 17 2026

SDC053-171906-
/O.EXP.KFSD.SV.W.0035.000000T0000Z-260517T1900Z/
Gregory SD-
156 PM CDT Sun May 17 2026

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHWESTERN GREGORY COUNTY
WILL EXPIRE AT 200 PM CDT...

The storm which prompted the warning has weakened below severe
limits, and no longer poses an immediate threat to life or property.
Therefore, the warning will be allowed to expire.  However, small
hail and gusty winds are still possible with this thunderstorm.

A Tornado Watch remains in effect until 1000 PM CDT for south central
South Dakota.

&&

LAT...LON 4331 9932 4338 9914 4301 9883 4299 9892
      4300 9930
TIME...MOT...LOC 1856Z 237DEG 47KT 4325 9905 

$$

Weisser



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