South Dakota hail map — August 11, 2026
NOAA radar detected hail of an inch or more over 1 South Dakota city on August 11, 2026. The largest stones — 1.00″, quarter size — fell over Rapid City.
- Cities hit
- 1
- in South Dakota
- Largest stone
- 1.00″
- quarter size
- Impact rating
- 3/10
- from stone size
Sizes come from NOAA MRMS radar (MESH), which runs about ±0.25″ against ground truth. It is canvass-targeting quality, not claim evidence.
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South Dakota cities hit on August 11, 2026
What people on the ground measured in South Dakota on August 11, 2026
12 reports filed with the National Weather Service. These are measured stones, not radar estimates, so they are the closest thing to proof that hail actually reached the ground.
- 4.00″ softball size Storm Chaser6 NW Oglala, SD6:48 PM CDTOglala Lakota County
Measured with calipers. Time estimated based on radar.
- 3.90″ baseball size Storm Chaser7 NNW Oglala, SD6:42 PM CDTOglala Lakota County
Measured with calipers along Highway 41. Via Spotter Network. Time adjusted based on radar.
- 3.60″ baseball size Storm Chaser2 SSW Hermosa, SD4:35 PM CDTCuster County
Measured along Highway 79 a bit further north than previous report. Via Spotter Network. Time estimated based on radar.
- 3.50″ baseball size PublicHermosa, SD4:30 PM CDTCuster County
Photos via social media. Time estimated based on radar.
- 3.40″ baseball size Storm Chaser3 SSW Hermosa, SD4:35 PM CDTCuster County
Measured along Highway 79. Via Spotter Network. Time adjusted based on radar.
- 3.25″ baseball size Public4 W Hermosa, SD4:21 PM CDTCuster County
Hail lasted for 15 minutes. Broken glass, downspouts and gutters, carport destroyed.
- 3.00″ baseball size Public1 NNE Hayward, SD4:15 PM CDTPennington County
Reported on Rushmore Ranch Rd. Photo via social media. Time estimated based on radar.
- 3.00″ baseball size Public4 WNW Hermosa, SD4:19 PM CDTPennington County
Along Highway 40. Photo via social media. Time estimated based on radar.
- 3.00″ baseball size Public2 SW Hermosa, SD4:33 PM CDTCuster County
Along Highway 36. Photo via social media. Time estimated based on radar.
- 3.00″ baseball size Public7 W Hermosa, SD5:10 PM CDTCuster County
Measured with a tape measure. Cars reported severely damaged. Time estimated based on radar.
- 3.00″ baseball size Storm Chaser13 E Buffalo Gap, SD6:16 PM CDTCuster County
Reported via Spotter Network along Riverside Rd. Time adjusted based on radar.
- 3.00″ baseball size Public2 WNW Oglala, SD6:54 PM CDTOglala Lakota County
Numerous vehicles and school buses severely damaged at the Loneman School. Start of school year will be delayed. Photos and information via social media. Time estimated based on radar.
Showing the 12 largest of 60 hail reports filed that day.
Reports come from the National Weather Service Local Storm Report feed, ingested every 15 minutes. A report records where the observer was, not the full extent of the swath — treat it as evidence about the storm, not about any one roof.
Other states hit on August 11, 2026
Other South Dakota hail days
South Dakota hail on August 11, 2026
NOAA radar put hail of an inch or more over 1 South Dakota city that day. The largest stones — 1.00 inches, quarter size — were over Rapid City. Every city hit is listed above with its own stone size.