Hail, Judith Basin
- When
- June 20, 1:00 PM MST
- Where
- Judith Basin County, 2.33 mi NW of Benchland
- Measured
- 1 in hail
- Reported by
- Trained Spotter
- Coordinates
- 47.100, -110.060
Trained spotter reports 1 inch hail.
Hail and Damaging Wind in Montana, June 20 to 21, 2024
A shortwave within southwesterly flow aloft resulted in a few thunderstorms June 20 ahead of a more robust shortwave that brought numerous strong to severe thunderstorms to the region June 21. Moist low level easterly flow, the passing shortwave and ample westerly flow aloft resulted in a favorable environment for supercells the 21st, primarily capable of producing large hail.
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
- 11
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.
A shortwave within southwesterly flow aloft resulted in a few thunderstorms June 20 ahead of a more robust shortwave that brought numerous strong to severe thunderstorms to the region June 21. Moist low level easterly flow, the passing shortwave and ample westerly flow aloft resulted in a favorable environment for supercells the 21st, primarily capable of producing large hail.
The radar
The Great Falls radar (KTFX), 108 km away, was scanning. The volume nearest the first event began at 19:58 UTC.
Event by event
10 hail, 1 thunderstorm wind. Local standard time, as filed.
Hail, Judith Basin
- When
- June 20, 1:50 PM MST
- Where
- Judith Basin County, 3.37 mi WNW of Moccasin
- Measured
- 1 in hail
- Reported by
- Trained Spotter
- Coordinates
- 47.060, -109.950
Quarter-sized hail fell for approximately 20 minutes. Damage to crops observed.
Hail, Judith Basin
- When
- June 20, 1:50 PM MST
- Where
- Judith Basin County, Hobson
- Measured
- 1.75 in hail
- Reported by
- Trained Spotter
- Coordinates
- 47.000, -109.870
Trained spotter reports golf ball sized hail.
Hail, Judith Basin
- When
- June 21, 12:47 PM MST
- Where
- Judith Basin County, Hobson
- Measured
- 2 in hail
- Reported by
- Trained Spotter
- Coordinates
- 47.000, -109.870
Trained spotter reported 1 to 2 inch hail with torrential rainfall. The hail completely covered the ground, making it white.
Hail, Meagher
- When
- June 21, 1:03 PM MST
- Where
- Meagher County, 22.17 mi NNW of Delpine
- Measured
- 1.25 in hail
- Reported by
- Public
- Coordinates
- 46.840, -110.700
Hail up to half dollar sized at Showdown Ski Area.
Hail, Fergus
- When
- June 21, 1:36 PM MST
- Where
- Fergus County, 8.48 mi SSW of Dunlap
- Measured
- 1 in hail
- Reported by
- COOP Observer
- Coordinates
- 46.910, -109.410
A Coop observer estimated hail of up to 1 inch in diameter. Time is estimated via radar.
Hail, Pondera
- When
- June 21, 3:00 PM MST
- Where
- Pondera County, 0.69 mi N of Brady
- Measured
- 1.75 in hail
- Reported by
- Public
- Coordinates
- 48.040, -111.830
The public reported golf ball sized hail along I-15. It was hailing long and hard enough, with low visibility, that vehicles had to pull over on I-15.
Hail, Pondera
- When
- June 21, 3:20 PM MST
- Where
- Pondera County, 7.85 mi E of Brady
- Measured
- 1.75 in hail
- Reported by
- Public
- Coordinates
- 48.030, -111.660
Golf ball sized hail was reported by the public on the s curve east of Brady on Brady rd.
Hail, Chouteau
- When
- June 21, 4:02 PM MST
- Where
- Chouteau County, 5.83 mi SSE of Genou
- Measured
- 2.5 in hail
- Reported by
- Public
- Coordinates
- 47.900, -111.180
A photo submitted from the public showed estimated 2.5 inch hail, along with damage to a vehicle windshield. Time was estimated via radar.
Thunderstorm Wind, Cascade
- When
- June 21, 4:51 PM MST
- Where
- Cascade County, 5.55 mi N of Great Falls
- Measured
- 61 kt (70 mph) measured gust
- Reported by
- Public
- Coordinates
- 47.600, -111.290
A gust of 70 mph was measured north of Great Falls. Location is estimated.
Hail, Cascade
- When
- June 21, 5:25 PM MST
- Where
- Cascade County, 2.5 mi SW of Salem
- Measured
- 1.5 in hail
- Reported by
- Public
- Coordinates
- 47.500, -111.060
Time and location estimated. Hail stones between 1 and 1.5 inches were observed.
What these are
- Hail
- Hail three-quarters of an inch or larger, or smaller hail that caused damage, filed with the largest stone measured.
- Thunderstorm Wind
- Winds from a thunderstorm of 50 knots (58 mph) or more, or lower winds that caused damage or casualties. Measured gusts are marked MG, estimated EG.
After NWS Directive 10-1605, the rules offices file Storm Data by.
The same day elsewhere
- Rip Currents in Florida, June 20 to 23, 2024
- Flooding in Iowa, June 20 to 30, 2024
- Flooding in South Dakota, June 20 to 30, 2024
- Tornado and Flash Flooding in Utah, June 20 to 21, 2024
- Rip Current in Florida, June 20, 2024
- Tornado and Flash Flooding in Nebraska, June 20, 2024
- Heat and Damaging Winds in New York, June 20, 2024
- Flash Flood and Debris Flows in Colorado, June 20 to 21, 2024
- Hail and Damaging Winds in Michigan, June 20, 2024
- Flash Flooding in South Dakota, June 20 to 22, 2024
- Tornadoes and Flash Flooding in Nebraska, June 20 to 21, 2024
- Flash Flooding and Flood in South Dakota, June 20 to 21, 2024
More
Every storm in Montana in 2024Every state in 2024This day in weather historyWarnings in Montana, June 2024
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 2026-10-01. Each event’s entry at NCEI: 1176045, 1176042, 1176044, 1176040, 1176039, 1176038, 1176036, 1176035, 1176034, 1176031, 1176030.