Hail map — July 31, 2025
NOAA radar detected hail of an inch or more over 18 cities across 9 states on July 31, 2025. The largest stones — 1.50″, half dollar size — fell over Hagerstown, MD.
- States hit
- 9
- Cities hit
- 18
- Largest stone
- 1.50″
- half dollar size
- Impact rating
- 5/10
- 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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States hit on July 31, 2025
Every state where NOAA radar put an inch or more of hail over a city that day, biggest stone first.
Hardest hit on July 31, 2025
What people on the ground measured in the US on July 31, 2025
15 reports filed with the National Weather Service — 3 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.
- 1.75″ golf ball size Public1 N Cheyenne, WY4:12 PM MDTLaramie County
Report from mPING: Golf Ball (1.75 in.).
- 1.75″ golf ball size Public2 SSE Lolo, MT5:52 PM MDTMissoula County
Multiple Facebook photos in the southern Lolo area depicted up to golf ball sized hail. The photo that showed possible golf ball was wide and flat.
- 1.75″ golf ball size Public20 NNW Van Norman, MT8:30 PM MDTGarfield County
Golf Ball sized hail.
- 1.50″ half dollar size Storm Chaser13 NNE Purcell, CO5:46 PM MDTWeld County
Report via Spotter Network.
- 1.25″ half dollar size NWS Employee1 WNW Cheyenne, WY4:10 PM MDTLaramie County
- 1.25″ half dollar size Public2 NE North Cheyenne, WY4:25 PM MDTLaramie County
Report from mPING: Half Dollar (1.25 in.).
- 1.25″ half dollar size Public1 SSE Great Falls, MT9:30 PM MDTCascade County
- 1.00″ quarter size Public3 NNW Twin Lakes, ID4:42 PM MDTKootenai County
- 1.00″ quarter size Amateur RadioArcher City, TX5:48 PM CDTArcher County
- 1.00″ quarter size Trained Spotter1 ENE Milton Reservoir, CO4:58 PM MDTWeld County
- 1.00″ quarter size Cocorahs6 NE Nunn, CO5:20 PM MDTWeld County
- 1.00″ quarter size Public2 WNW Great Falls, MT9:10 PM MDTCascade County
Time of report estimated via radar.
- 0.88″ penny size Public2 N Twin Lakes, ID4:42 PM MDTKootenai County
report from facebook.
- 0.88″ penny size Trained Spotter7 E Marysville, MT7:19 PM MDTLewis and Clark County
- 0.75″ penny size Public2 E Cheyenne, WY4:14 PM MDTLaramie County
Report from mPING: Dime (0.75 in.).
Showing the 15 largest of 28 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 hail days
US hail on July 31, 2025
NOAA radar put hail of an inch or more over 18 cities across 9 states on July 31, 2025. The largest stones — 1.50 inches, half dollar size — were over Hagerstown, MD. Every state hit is listed on this page, and every city under it.