South Dakota hail map — July 27, 2025
NOAA radar detected hail of an inch or more over 2 South Dakota cities on July 27, 2025. The largest stones — 2.00″, hen egg size — fell over Watertown.
- Cities hit
- 2
- in South Dakota
- Largest stone
- 2.00″
- hen egg size
- Impact rating
- 7/10
- 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 July 27, 2025
What people on the ground measured in South Dakota on July 27, 2025
10 reports filed with the National Weather Service — 5 from trained spotters or officials. These are measured stones, not radar estimates, so they are the closest thing to proof that hail actually reached the ground.
- 2.75″ baseball size Trained SpotterWatertown Airport, SD6:40 PM CDTCodington County
- 1.75″ golf ball size Trained Spotter4 NW Rauville, SD6:26 PM CDTCodington County
- 1.75″ golf ball size Trained Spotter4 NE Hazel, SD7:40 PM CDTHamlin County
Radar estimated time.
- 1.75″ golf ball size Trained Spotter3 NW Castlewood, SD8:00 PM CDTHamlin County
- 1.50″ half dollar size Public1 SW Watertown, SD6:54 PM CDTCodington County
- 1.00″ quarter size Public1 SW Watertown, SD7:12 PM CDTCodington County
Also reported limbs down.
- 1.00″ quarter size Trained Spotter6 NW Clearfield, SD7:37 PM CDTTripp County
- 1.00″ quarter size Public5 S Keyapaha, SD8:05 PM CDTTripp County
- 1.00″ quarter size PublicCastlewood, SD8:25 PM CDTHamlin County
- 0.70″ penny size Public4 SW Clearfield, SD8:31 PM CDTTripp County
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 July 27, 2025
The full US hail map for July 27, 2025 →Other South Dakota hail days
South Dakota hail on July 27, 2025
NOAA radar put hail of an inch or more over 2 South Dakota cities that day. The largest stones — 2.00 inches, hen egg size — were over Watertown. Every city hit is listed above with its own stone size.