Hail, Gallatin
- When
- July 27, 3:05 PM MST
- Where
- Gallatin County, 5 mi NE of Three Forks
- Measured
- 1 in hail
- Reported by
- Trained Spotter
- Coordinates
- 45.931, -111.477
A thunderstorm dropped 1 inch diameter hail at Three Forks 5NE.
Hail and High Wind in Montana, July 27 to 31, 2010
An unstable airmass allowed thunderstorms to develop over portions of southwest Montana late in the afternoon. Hail the size of golf balls was reported.
Where it happened
Every event with a place to put it. Tap one for its entry below.
- Tornadoes
- Tropical storms and surge
- Floods
- Wind
- Hail
- Winter weather
- Heat and drought
- Cold
- Fire, smoke and dust
- Marine and coastal
- Other
The toll
- Deaths
- 0
- Injuries
- 0
- Property damage
- None recorded
- Crop damage
- None recorded
- Events
- 4
Deaths and injuries are direct and indirect together, as the offices filed them. Damage is property and crops in the dollars of the year, not adjusted for inflation, and only where an office estimated it.
What happened
The episode as NWS TFX wrote it up.
An unstable airmass allowed thunderstorms to develop over portions of southwest Montana late in the afternoon. Hail the size of golf balls was reported.
The radar
The Great Falls radar (KTFX), 170 km away, was scanning. The volume nearest the first event began at 22:03 UTC.
Event by event
2 hail, 2 high wind. Local standard time, as filed.
High Wind, Southern Lewis and Clark
- When
- July 31, 2:20 PM MST
- Where
- Southern Lewis and Clark forecast zone
- Measured
- 50 kt (58 mph) estimated gust
- Reported by
- Trained Spotter
A wind gust to 58 mph was reported at Marysville 6E. The gust was associated with the passage of a boundary through the area.
High Wind, Southern Lewis and Clark
- When
- July 31, 2:20 PM MST
- Where
- Southern Lewis and Clark forecast zone
- Measured
- 50 kt (58 mph) estimated gust
- Reported by
- Trained Spotter
A wind gust to 58 mph was reported at Marysville 6ESE. The gust was associated with the passage of a boundary through the area.
Hail, Gallatin
- When
- July 31, 5:00 PM MST
- Where
- Gallatin County, 10 mi S of Gallatin Gateway
- Measured
- 1.5 in hail
- Reported by
- Trained Spotter
- Coordinates
- 45.435, -111.200
A thunderstorm dropped 1.5 inch diameter hail at Gallatin Gateway 10S.
What these are
- Hail
- Hail three-quarters of an inch or larger, or smaller hail that caused damage, filed with the largest stone measured.
- High Wind
- Sustained non-thunderstorm winds of 40 mph or more for an hour, or gusts of 58 mph or more.
After NWS Directive 10-1605, the rules offices file Storm Data by.
The same day elsewhere
- Flash Flooding and Lightning Strike in Kentucky, July 27, 2010
- Tornadoes and Hail in Wisconsin, July 27, 2010
- Tornadoes and Damaging Winds in Wisconsin, July 27, 2010
- Flooding in Illinois, July 27 to 31, 2010
- Flash Flood and Hail in Wisconsin, July 27, 2010
- Flash Flood and Hail in South Carolina, July 27, 2010
- Flash Flooding and Hail in Utah, July 27 to 31, 2010
- Flash Flood and Damaging Winds in North Carolina, July 27, 2010
- Flash Flood in Arizona, July 27, 2010
- Damaging Winds in Minnesota, July 27, 2010
- Damaging Winds and Lightning Strike in Georgia, July 27, 2010
- Flash Flooding and Heavy Rain in Colorado, July 27, 2010
More
Every storm in Montana in 2010Every state in 2010This day in weather historyWarnings in Montana, July 2010
Sources
NOAA National Centers for Environmental Information, Storm Events Database, compiled from the National Weather Service’s monthly Storm Data. Complete through 2026-06; NCEI adds each month about 75 days after it ends and revises past years a few times a year. Rebuilt 2026-09-30. Each event’s entry at NCEI: 240253, 240324, 240326, 240330.