8/18/2025 3:10:00 PM until 8/18/2025 4:00:00 PM

This storm is producing large hail. SEEK SHELTER NOW inside a sturdy structure and stay away from windows.

At 308 PM MDT, a severe thunderstorm was located over Hisega, or 9 miles west of Rapid City, moving southeast at 15 mph. Golf ball to baseball sized hail was recently reported in Hisega, Johnson Siding, and near Pactola Reservoir. THIS IS A DESTRUCTIVE STORM FOR ROCKERVILLE AND SOUTHWESTERN RAPID CITY. HAZARD...Baseball size hail. SOURCE...Public. IMPACT...People and animals outdoors will be severely injured. Expect shattered windows, extensive damage to roofs, siding, and vehicles. Locations impacted include... Southwestern Rapid City, Johnson Siding, Keystone, Hisega, Rockerville, Mount Rushmore National Memorial, Sheridan Lake, Bear Country, Keystone Wye, Hart Ranch, and Reptile Gardens.