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Rapid City, South Dakota Hail Report and Map: August 11, 2026

Published by StormLens · Storm date (Eastern time)

Was there hail in Rapid City, SD on August 11, 2026? Radar estimated hail up to 0.85 inch inside the town limits of Rapid City on August 11, 2026 (Eastern time). Radar estimates of at least 0.5 inch covered 25% of the town. Across the report area, the maximum radar estimate was 3.99 inches. The strongest part of the swath was about 10 miles southwest of Rapid City, SD. Radar detected hail aloft in this area between about 2:25 p.m. and 7:05 p.m. MT on August 11, 2026.

Radar-estimated hail swath in Rapid City, SD on August 11, 2026; colors show estimated hail sizes

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Hail estimates at a glance

Storm date (Eastern time)August 11, 2026 (Tuesday)
Maximum radar estimate across the area3.99 inches; strongest part of the swath about 10 miles southwest of Rapid City, SD
Maximum radar estimate inside Rapid City0.85 inch
Share of Rapid City with radar estimates of at least 0.5 inch25%
Approximate radar timingBetween about 2:25 p.m. and 7:05 p.m. MT on August 11, 2026 (Mountain time)
County coverage includes (0.5 inch or larger)Sheridan County (340 sq mi), Custer County (328 sq mi), Oglala Lakota County (308 sq mi), Pennington County (298 sq mi), Cherry County (172 sq mi) and Lawrence County (137 sq mi)
Area with radar estimates of 0.5 inch or largerabout 1,633 square miles
Area with radar estimates of 1 inch or largerabout 800 square miles
SourceNOAA MRMS radar hail estimates (MESH)

Which towns had hail on August 11, 2026?

Radar estimated hail of at least 0.5 inch inside these town limits, using U.S. Census boundaries. Each percentage is the share of town area with those estimates.

TownCountyMaximum radar estimate inside town limitsTown area with estimates of at least 0.5 inch
Colonial Pine Hills, SDPennington County3.63 inches64%
Oglala, SDOglala Lakota County1.75 inches100%
White Clay, NE1.72 inches100%
Pine Ridge, SDOglala Lakota County1.65 inches100%
Clinton, NE1.47 inches100%
Johnson Siding, SDPennington County1.26 inches30%
Hermosa, SD0.95 inch100%
Hill City, SDPennington County0.94 inch87%
Rapid City, SDPennington County0.85 inch25%
Blackhawk, SDMeade County0.8 inch34%

How big was the hail in Rapid City?

Radar estimated hail up to 0.85 inch inside the town limits of Rapid City. Among the listed towns, the highest estimate was 3.63 inches inside the limits of Colonial Pine Hills. The maximum estimates in Pine Ridge, Blackhawk and Oglala were 1.75 inches or less. A town's maximum isn't an estimate for every home. Check the swath for estimates around an address.

What time did radar detect hail?

Radar detected hail aloft in this area between about 2:25 p.m. and 7:05 p.m. MT on August 11, 2026. We used 50 NOAA radar hail detections in this area to estimate the window. We trim outlying detection times when enough are available, then round down to five-minute marks. It doesn't give an arrival time at an address.

Data source and limits

We use NOAA's MRMS radar product MESH (Maximum Estimated Size of Hail) for hail-size estimates. Each town's figure is the maximum inside its Census town limits. The percentage is the town area with estimates of at least 0.5 inch. A town's maximum isn't an estimate for every home. Each storm date covers one calendar day in Eastern time. A late-evening storm west of the Eastern time zone can appear under two dates. Radar estimates don't confirm hail on the ground or roof damage. Hail of 0.5 to 0.75 inch can damage roofs, especially older roofs. An estimate below 1 inch doesn't rule out damage. Read how we calculate sizes and times.

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