Headline:
Severe Thunderstorm Warning issued August 11 at 9:23PM MDT until August 11 at 9:45PM MDT by NWS Rapid City SD
Event:
Severe Thunderstorm Warning
Urgency:
Immediate
Effective:
August 11, 2026 - 8:23pm
Expires:
August 11, 2026 - 8:45pm
Description:
At 923 PM MDT, a severe thunderstorm was located over Cactus Flat, or
20 miles southwest of Philip, moving southeast at 35 mph.
HAZARD...70 mph wind gusts and half dollar 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...
Interior, Cactus Flat, Cedar Pass, Cottonwood, Minuteman Missile
Visitors Center, Delta 1 Launch Facility and northeastern Badlands
National Park.
This includes Interstate 90 in South Dakota between Mile Markers 120
and 146.
Instruction:
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 large hail.
Continuous cloud to ground lightning is occurring with this storm.
Lightning is one of nature's leading killers. Remember, if you can
hear thunder, you are close enough to be struck by lightning.
Very heavy rainfall is also occurring with this storm and may lead to
localized flooding. Do not drive your vehicle through flooded
roadways.
Area Description:
Jackson, SD; Pennington, SD
Forcast Office:
NWS Rapid City SD
Sender:
w-nws.webmaster@noaa.gov