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Home Return to list Severe Thunderstorm Warning 0260 Issued by the Rapid City Forecast Office
Action: New Issued At: 2026-08-11 18:06:40
627
WUUS53 KUNR 112306
SVRUNR
SDC033-103-120000-
/O.NEW.KUNR.SV.W.0260.260811T2306Z-260812T0000Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Rapid City SD
506 PM MDT Tue Aug 11 2026
The National Weather Service in Rapid City has issued a
* Severe Thunderstorm Warning for...
Northwestern Custer County in southwestern South Dakota...
West Central Pennington County in west central South Dakota...
* Until 600 PM MDT.
* At 506 PM MDT, a severe thunderstorm was located near Deerfield, or
18 miles northwest of Hill City, moving southeast at 20 mph.
HAZARD...Ping pong ball size hail.
SOURCE...Radar indicated.
IMPACT...People and animals outdoors will be injured. Expect damage
to roofs, siding, windows, and vehicles.
* Locations impacted include...
Deerfield, Flag Mountain, Deerfield Reservoir, Bear Mountain
Lookout, Medicine Mountain and Redbank Spring Campground.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Seek shelter inside a well-built structure and stay away from
windows. This storm is capable of producing large hail.
&&
LAT...LON 4406 10403 4413 10386 4392 10357 4375 10387
TIME...MOT...LOC 2306Z 326DEG 16KT 4404 10390
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...1.50 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...<50 MPH
$$
SE
Action: Continued Issued At: 2026-08-11 18:13:26 001 WWUS53 KUNR 112312 RRA SVSUNR Severe Weather Statement National Weather Service Rapid City SD 512 PM MDT Tue Aug 11 2026 SDC033-103-120000- /O.CON.KUNR.SV.W.0260.000000T0000Z-260812T0000Z/ Custer SD-Pennington SD- 512 PM MDT Tue Aug 11 2026 ...SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 6 PM MDT FOR NORTHWESTERN CUSTER AND WEST CENTRAL PENNINGTON COUNTIES... At 512 PM MDT, a severe thunderstorm was located over Deerfield, or 16 miles west of Hill City, moving southeast at 20 mph. HAZARD...Quarter size hail. SOURCE...Radar indicated. IMPACT...Damage to vehicles is expected. Locations impacted include... Deerfield, Flag Mountain, Deerfield Reservoir, Medicine Mountain and Bear Mountain Lookout. PRECAUTIONARY/PREPAREDNESS ACTIONS... Seek shelter inside a well-built structure and stay away from windows. This storm is capable of producing large hail. && LAT...LON 4405 10396 4410 10382 4392 10357 4378 10382 TIME...MOT...LOC 2306Z 322DEG 16KT 4404 10389 HAIL THREAT...RADAR INDICATED MAX HAIL SIZE...1.00 IN WIND THREAT...RADAR INDICATED MAX WIND GUST...<50 MPH $$ SE Action: Cancelled Issued At: 2026-08-11 18:25:26 346 WWUS53 KUNR 112324 SVSUNR Severe Weather Statement National Weather Service Rapid City SD 524 PM MDT Tue Aug 11 2026 SDC033-103-112334- /O.CAN.KUNR.SV.W.0260.000000T0000Z-260812T0000Z/ Custer SD-Pennington SD- 524 PM MDT Tue Aug 11 2026 ...SEVERE THUNDERSTORM WARNING IS CANCELLED FOR NORTHWESTERN CUSTER AND WEST CENTRAL PENNINGTON COUNTIES... 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 has been cancelled. However, small hail, gusty winds, and heavy rain are still possible with this thunderstorm. A Severe Thunderstorm Watch remains in effect until 800 PM MDT for portions of southwest and west central South Dakota. && LAT...LON 4405 10396 4410 10382 4392 10357 4378 10382 TIME...MOT...LOC 2312Z 322DEG 16KT 4402 10386 $$ SE | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||