656 
WUUS53 KUNR 120604
SVRUNR
SDC123-120630-
/O.NEW.KUNR.SV.W.0276.260812T0604Z-260812T0630Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Rapid City SD
104 AM CDT Wed Aug 12 2026

The National Weather Service in Rapid City has issued a

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

* Until 130 AM CDT.

* At 104 AM CDT, severe thunderstorms were located along a line from
  9 miles north of Colome to 20 miles south of Keyapaha, or along a
  line from 9 miles east of Winner to 41 miles south of Winner,
  moving southeast at 45 mph.

  HAZARD...70 mph wind gusts and quarter size hail.

  SOURCE...Radar indicated.

  IMPACT...Hail damage to vehicles is expected. Expect considerable
           tree damage. Wind damage is also likely to mobile homes,
           roofs, and outbuildings.

* Locations impacted include...
  Winner, Colome, Millboro, Wewela, Ideal South Housing and Dog Ear
  Lake.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Anyone outdoors should move to shelter inside a well-built structure
and stay away from windows. These storms are capable of producing
widespread damaging winds and large hail.

This storm has a history of producing damaging winds.

&&

LAT...LON 4300 10018 4309 10001 4345 9979 4337 9953
      4300 9953
TIME...MOT...LOC 0604Z 305DEG 38KT 4339 9968 4299 9981 4281 10013

THUNDERSTORM DAMAGE THREAT...CONSIDERABLE
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...1.00 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...70 MPH

$$

Helgeson

181 
WWUS53 KUNR 120621
SVSUNR

Severe Weather Statement
National Weather Service Rapid City SD
121 AM CDT Wed Aug 12 2026

SDC123-120630-
/O.CON.KUNR.SV.W.0276.000000T0000Z-260812T0630Z/
Tripp SD-
121 AM CDT Wed Aug 12 2026

...SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 130 AM CDT FOR
SOUTHEASTERN TRIPP COUNTY...

At 121 AM CDT, severe thunderstorms were located along a line from 11
miles east of Colome to 22 miles southwest of Wewela, or along a line
from 18 miles east of Winner to 45 miles south of Winner, moving
southeast at 40 mph.

HAZARD...70 mph wind gusts and small hail.

SOURCE...Automated observations.

IMPACT...Expect considerable tree damage. Damage is likely to mobile
         homes, roofs, and outbuildings.

Locations impacted include...
  Winner, Colome, Millboro, Wewela, Ideal South Housing and Dog Ear
  Lake.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Anyone outdoors should move to shelter inside a well-built structure
and stay away from windows. These storms have produced widespread
damaging winds.

This storm has a history of producing damaging winds.

&&

LAT...LON 4300 10018 4309 10001 4345 9979 4337 9953
      4300 9953
TIME...MOT...LOC 0604Z 303DEG 35KT 4339 9968 4300 9981 4281 10013

THUNDERSTORM DAMAGE THREAT...CONSIDERABLE
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...<1.00 IN
WIND THREAT...OBSERVED
MAX WIND GUST...70 MPH

$$

Helgeson

653 
WWUS53 KUNR 120629
SVSUNR

Severe Weather Statement
National Weather Service Rapid City SD
129 AM CDT Wed Aug 12 2026

SDC123-120639-
/O.EXP.KUNR.SV.W.0276.000000T0000Z-260812T0630Z/
Tripp SD-
129 AM CDT Wed Aug 12 2026

...SEVERE THUNDERSTORM WARNING WILL EXPIRE AT 130 AM CDT FOR
SOUTHEASTERN TRIPP COUNTY...

The Severe Thunderstorm Warning that was previously in effect has
been reissued for Tripp County and is in effect until 145 AM CDT.
Please refer to that bulletin for the latest severe weather
information. However, small hail and gusty winds are still possible
with these thunderstorms.

A Severe Thunderstorm Watch remains in effect until 600 AM CDT for a
portion of south central South Dakota.

&&

LAT...LON 4300 10018 4309 10001 4345 9979 4337 9953
      4300 9953
TIME...MOT...LOC 0621Z 304DEG 35KT 4330 9950 4291 9962 4272 9995

$$

Helgeson