Montana hail map — July 31, 2025
NOAA radar detected hail of an inch or more over 3 Montana cities on July 31, 2025. The largest stones — 1.00″, quarter size — fell over Missoula.
- Cities hit
- 3
- in Montana
- 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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Montana cities hit on July 31, 2025
What people on the ground measured in Montana on July 31, 2025
8 reports filed with the National Weather Service — 4 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 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.
- 1.25″ half dollar size Public1 SSE Great Falls, MT9:30 PM MDTCascade County
- 1.00″ quarter size Public2 WNW Great Falls, MT9:10 PM MDTCascade County
Time of report estimated via radar.
- 0.88″ penny size Trained Spotter7 E Marysville, MT7:19 PM MDTLewis and Clark County
- 0.75″ penny size Emergency Mngr1 NNW Butte, MT5:31 PM MDTSilver Bow County
Silver Bow County EM reporting 0.4-0.8 inch sized hail accumulating on the ground in Butte.
- 0.50″ penny size NWS Employee6 WNW Missoula, MT6:30 PM MDTMissoula County
Hail partially covered the ground. Very heavy rainfall of 0.80 inch.
- 0.25″ penny size NWS Employee4 N East Helena, MT7:41 PM MDTLewis and Clark 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 Montana hail days
Montana hail on July 31, 2025
NOAA radar put hail of an inch or more over 3 Montana cities that day. The largest stones — 1.00 inches, quarter size — were over Missoula. Every city hit is listed above with its own stone size.