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Home Return to list Severe Thunderstorm Warning 0279 Issued by the Rapid City Forecast Office
Action: New Issued At: 2026-08-12 14:04:21
650
WUUS53 KUNR 121903
SVRUNR
WYC005-045-121945-
/O.NEW.KUNR.SV.W.0279.260812T1903Z-260812T1945Z/
BULLETIN - EAS ACTIVATION REQUESTED
Severe Thunderstorm Warning
National Weather Service Rapid City SD
103 PM MDT Wed Aug 12 2026
The National Weather Service in Rapid City has issued a
* Severe Thunderstorm Warning for...
Southeastern Campbell County in northeastern Wyoming...
Western Weston County in northeastern Wyoming...
* Until 145 PM MDT.
* At 103 PM MDT, a severe thunderstorm was located 11 miles east of
Black Thunder Mine, or 12 miles east of Wright, moving east at 30
mph.
HAZARD...Two inch 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.
* Locations impacted include...
Coal Creek Mine, Black Thunder Mine, NARM Mine North, Hilight Gas
Plant, Rochelle and Clareton.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Anyone outdoors should move to shelter inside a well-built structure
and stay away from windows. This storm is capable of producing
dangerous hail and damaging winds.
&&
LAT...LON 4362 10537 4400 10538 4418 10472 4418 10468
4353 10463
TIME...MOT...LOC 1903Z 270DEG 24KT 4373 10526
THUNDERSTORM DAMAGE THREAT...CONSIDERABLE
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...2.00 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH
$$
Schultz
Action: Continued Issued At: 2026-08-12 14:07:21
703
WWUS53 KUNR 121907
SVSUNR
Severe Weather Statement
National Weather Service Rapid City SD
107 PM MDT Wed Aug 12 2026
WYC005-045-121945-
/O.CON.KUNR.SV.W.0279.000000T0000Z-260812T1945Z/
Campbell WY-Weston WY-
107 PM MDT Wed Aug 12 2026
...SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 145 PM MDT FOR
SOUTHEASTERN CAMPBELL AND WESTERN WESTON COUNTIES...
At 107 PM MDT, a severe thunderstorm was located 13 miles east of
Black Thunder Mine, or 13 miles east of Wright, moving east at 30
mph.
HAZARD...Two inch hail and 60 mph wind gusts.
SOURCE...Radar indicated.
IMPACT...People and animals outdoors will be injured. Expect hail
damage to roofs, siding, windows, and vehicles. Expect wind
damage to roofs, siding, and trees.
Locations impacted include...
Coal Creek Mine, Black Thunder Mine, NARM Mine North, Rochelle and
Clareton.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Anyone outdoors should move to shelter inside a well-built structure
and stay away from windows. This storm is capable of producing
dangerous hail and damaging winds.
Tornadoes can develop quickly from severe thunderstorms. Seek shelter
immediately in an interior room on the lowest floor of a well-built
structure.
&&
LAT...LON 4361 10532 4401 10534 4418 10472 4418 10468
4353 10463
TIME...MOT...LOC 1903Z 270DEG 24KT 4373 10525
TORNADO...POSSIBLE
THUNDERSTORM DAMAGE THREAT...CONSIDERABLE
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...2.00 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH
$$
Schultz
Action: Continued Issued At: 2026-08-12 14:15:51
074
WWUS53 KUNR 121915
SVSUNR
Severe Weather Statement
National Weather Service Rapid City SD
115 PM MDT Wed Aug 12 2026
WYC005-045-121945-
/O.CON.KUNR.SV.W.0279.000000T0000Z-260812T1945Z/
Campbell WY-Weston WY-
115 PM MDT Wed Aug 12 2026
...SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 145 PM MDT FOR
SOUTHEASTERN CAMPBELL AND WESTERN WESTON COUNTIES...
At 115 PM MDT, a severe thunderstorm was located 17 miles east of
Black Thunder Mine, or 17 miles east of Wright, moving east at 30
mph.
HAZARD...Two inch 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.
Locations impacted include...
Clareton.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Anyone outdoors should move to shelter inside a well-built structure
and stay away from windows. This storm is capable of producing
dangerous hail and damaging winds.
Tornadoes can develop quickly from severe thunderstorms. Seek shelter
immediately in an interior room on the lowest floor of a well-built
structure.
&&
LAT...LON 4365 10525 4398 10527 4418 10468 4353 10463
TIME...MOT...LOC 1907Z 270DEG 24KT 4373 10522
TORNADO...POSSIBLE
THUNDERSTORM DAMAGE THREAT...CONSIDERABLE
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...2.00 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH
$$
Schultz
Action: Continued Issued At: 2026-08-12 14:23:36
169
WWUS53 KUNR 121923
SVSUNR
Severe Weather Statement
National Weather Service Rapid City SD
123 PM MDT Wed Aug 12 2026
WYC005-045-121945-
/O.CON.KUNR.SV.W.0279.000000T0000Z-260812T1945Z/
Campbell WY-Weston WY-
123 PM MDT Wed Aug 12 2026
...SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 145 PM MDT FOR
SOUTHEASTERN CAMPBELL AND WESTERN WESTON COUNTIES...
At 123 PM MDT, a severe thunderstorm was located 11 miles northwest
of Rochelle, or 21 miles east of Wright, moving east at 30 mph.
HAZARD...Two inch hail and 70 mph wind gusts.
SOURCE...Radar indicated.
IMPACT...People and animals outdoors will be injured. Expect hail
damage to roofs, siding, windows, and vehicles. Expect
considerable tree damage. Wind damage is also likely to
mobile homes, roofs, and outbuildings.
Locations impacted include...
Clareton.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Anyone outdoors should move to shelter inside a well-built structure
and stay away from windows. This storm is capable of producing
widespread damaging winds and dangerous hail.
Tornadoes can develop quickly from severe thunderstorms. Seek shelter
immediately in an interior room on the lowest floor of a well-built
structure.
&&
LAT...LON 4364 10520 4393 10519 4412 10468 4353 10463
TIME...MOT...LOC 1915Z 270DEG 24KT 4373 10514
TORNADO...POSSIBLE
THUNDERSTORM DAMAGE THREAT...CONSIDERABLE
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...2.00 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...70 MPH
$$
Schultz
Action: Continued Issued At: 2026-08-12 14:30:22
426
WWUS53 KUNR 121930
SVSUNR
Severe Weather Statement
National Weather Service Rapid City SD
130 PM MDT Wed Aug 12 2026
WYC005-045-121945-
/O.CON.KUNR.SV.W.0279.000000T0000Z-260812T1945Z/
Campbell WY-Weston WY-
130 PM MDT Wed Aug 12 2026
...SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 145 PM MDT FOR
EASTERN CAMPBELL AND SOUTHWESTERN WESTON COUNTIES...
At 130 PM MDT, a severe thunderstorm was located 10 miles north of
Rochelle, or 24 miles east of Wright, moving east at 30 mph.
HAZARD...Two inch hail and 70 mph wind gusts.
SOURCE...Radar indicated.
IMPACT...People and animals outdoors will be injured. Expect hail
damage to roofs, siding, windows, and vehicles. Expect
considerable tree damage. Wind damage is also likely to
mobile homes, roofs, and outbuildings.
Locations impacted include...
Clareton and Rochelle.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Anyone outdoors should move to shelter inside a well-built structure
and stay away from windows. This storm is capable of producing
widespread damaging winds and dangerous hail.
Tornadoes can develop quickly from severe thunderstorms. Seek shelter
immediately in an interior room on the lowest floor of a well-built
structure.
&&
LAT...LON 4362 10512 4388 10510 4400 10467 4353 10463
TIME...MOT...LOC 1923Z 270DEG 24KT 4373 10507
TORNADO...POSSIBLE
THUNDERSTORM DAMAGE THREAT...CONSIDERABLE
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...2.00 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...70 MPH
$$
Schultz
Action: Expired Issued At: 2026-08-12 14:45:52 844 WWUS53 KUNR 121945 SVSUNR Severe Weather Statement National Weather Service Rapid City SD 145 PM MDT Wed Aug 12 2026 WYC005-045-121955- /O.EXP.KUNR.SV.W.0279.000000T0000Z-260812T1945Z/ Campbell WY-Weston WY- 145 PM MDT Wed Aug 12 2026 ...SEVERE THUNDERSTORM WARNING HAS EXPIRED FOR EASTERN CAMPBELL AND SOUTHWESTERN WESTON COUNTIES... The Severe Thunderstorm Warning that was previously in effect has been reissued for Weston County and is in effect until 230 PM MDT. Please refer to that bulletin for the latest severe weather information. A Severe Thunderstorm Watch remains in effect until 800 PM MDT Wednesday for a portion of northeast Wyoming. && LAT...LON 4362 10512 4388 10510 4400 10467 4353 10463 TIME...MOT...LOC 1930Z 270DEG 24KT 4373 10500 $$ Schultz | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||