Heavy Rain, Phillips
- When
- July 28, 4:30 PM MST to 4:45 PM MST
- Where
- Phillips County, Whitewater
- Reported by
- Trained Spotter
- Coordinates
- 48.770, -107.620
Rainfall of 1.62 inches along with .25 hail fell with the thunderstorm.
Flash Flood and Hail in Montana, July 28, 2010
A Supercell thunderstorm formed in northern Phillips County near Whitewater and moved southeast through the Glasgow area (Valley County). The storm quickly dissipated southeast of Glasgow in northern McCone County.
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
- $28,000
- Crop damage
- None recorded
- Events
- 16
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 GGW wrote it up.
A Supercell thunderstorm formed in northern Phillips County near Whitewater and moved southeast through the Glasgow area (Valley County). The storm quickly dissipated southeast of Glasgow in northern McCone County.
The radar
The Glasgow radar (KGGW), 96 km away, was scanning. The volume nearest the first event began at 23:31 UTC.
Event by event
11 hail, 3 thunderstorm wind, 1 heavy rain, 1 flash flood. Local standard time, as filed.
Hail, Phillips
- When
- July 28, 4:55 PM MST
- Where
- Phillips County, 5 mi N of Whitewater
- Measured
- 1 in hail
- Reported by
- Trained Spotter
- Coordinates
- 48.842, -107.620
At 1655 MST 5 miles north of Whitewater, a spotter reported one inch hail.
Hail, Phillips
- When
- July 28, 4:55 PM MST
- Where
- Phillips County, 2 mi NE of Whitewater
- Measured
- 0.88 in hail
- Reported by
- Trained Spotter
- Coordinates
- 48.791, -107.589
Spotter reported nickel size hail.
Hail, Phillips
- When
- July 28, 5:15 PM MST
- Where
- Phillips County, 12 mi SE of Whitewater
- Measured
- 1 in hail
- Reported by
- Trained Spotter
- Coordinates
- 48.647, -107.434
Hail up to one inch in size was reported. The hail was a foot deep in some areas.
Hail, Phillips
- When
- July 28, 5:20 PM MST
- Where
- Phillips County, 5 mi E of Whitewater
- Measured
- 0.75 in hail
- Reported by
- Trained Spotter
- Coordinates
- 48.770, -107.510
Hail, Valley
- When
- July 28, 6:10 PM MST
- Where
- Valley County, 15.55 mi N of Hinsdale to 11.17 mi NNW of Hinsdale
- Measured
- 0.75 in hail
- Reported by
- Trained Spotter
- Coordinates
- 48.625, -107.067
At 1810 MST 10 miles southeast of Frenchmen Reservoir, hail fell with 40 mph winds.
Hail, Valley
- When
- July 28, 6:10 PM MST
- Where
- Valley County, 14 mi N of Hinsdale
- Measured
- 1 in hail
- Reported by
- Trained Spotter
- Coordinates
- 48.603, -107.080
Quarter size hail reported.
Hail, Phillips
- When
- July 28, 6:15 PM MST
- Where
- Phillips County, 9 mi NE of Saco
- Measured
- 0.75 in hail
- Reported by
- Storm Chaser
- Coordinates
- 48.562, -107.191
Penny size hail reported by Frenchman Dam caretakers.
Thunderstorm Wind, Valley
- When
- July 28, 6:28 PM MST
- Where
- Valley County, 4 mi N of Hinsdale
- Measured
- 65 kt (75 mph) estimated gust
- Reported by
- NWS Storm Survey
- Coordinates
- 48.458, -107.080
An older barn north of Hinsdale had the metal roof sheeting peeled off and thrown downstream by straight line winds. Several round hail bales were rolled, and many tree branches were broken.
Hail, Valley
- When
- July 28, 6:57 PM MST
- Where
- Valley County, Vandalia
- Measured
- 0.75 in hail
- Reported by
- Trained Spotter
- Coordinates
- 48.350, -106.900
Hail, Valley
- When
- July 28, 7:15 PM MST
- Where
- Valley County, 14 mi NW of Glasgow
- Measured
- 0.75 in hail
- Reported by
- Trained Spotter
- Coordinates
- 48.343, -106.845
A thunderstorm wind gust to 75 mph combined with the hail to break windows and damage siding.
Thunderstorm Wind, Valley
- When
- July 28, 7:15 PM MST
- Where
- Valley County, 14 mi NW of Glasgow
- Measured
- 65 kt (75 mph) measured gust
- Property damage
- $3,000
- Reported by
- COOP Observer
- Coordinates
- 48.343, -106.845
Coop observer reported damage to windows and siding of his home with winds of 75 mph and three-quarter inch hail.
Hail, Valley
- When
- July 28, 7:17 PM MST
- Where
- Valley County, Tampico
- Measured
- 1 in hail
- Reported by
- COOP Observer
- Coordinates
- 48.300, -106.820
Cooperative Weather Observer reported quarter size hail at Tampico.
Hail, Valley
- When
- July 28, 7:35 PM MST to 7:55 PM MST
- Where
- Valley County, 4 mi NW of Glasgow to 3 mi ESE of Glasgow
- Measured
- 1 in hail
- Reported by
- NWS Employee
- Coordinates
- 48.241, -106.691
Two NWS employees and the NWS office all reported one inch hail.
Thunderstorm Wind, Valley
- When
- July 28, 7:38 PM MST to 7:50 PM MST
- Where
- Valley County, 2 mi NW of Glasgow
- Measured
- 74 kt (85 mph) estimated gust
- Property damage
- $25,000
- Reported by
- NWS Employee
- Coordinates
- 48.221, -106.661
At 1938, 2 miles northwest of Glasgow, numerous large tree branches of 6 inches plus in diameter and 15 to 25 feet long were snapped off of trees with severe winds and one inch hail. The winds and hail lasted for 12 minutes. Minor damage was reported in the area with some siding, windows and shingle damage to homes. The home of the NWS employee received new shingles and sky lights. Another NWS employee nearby had the seals on their windows broken.
Flash Flood, Valley
- When
- July 28, 7:44 PM MST to 8:05 PM MST
- Where
- Valley County, 6 mi W of Glasgow to 1 mi NW of Glasgow
- Cause
- Heavy Rain
- Reported by
- NWS Employee
- Coordinates
- 48.200, -106.760
Six miles west of Glasgow at 1944 MST, water flowed over the road. At 2005 MST 2 miles northwest of Glasgow NWS employee reported 1.8 of rain fell in 25 minutes. Also, flash flooding occurred in Glasgow, where the 6th Street underpass and the parking lots of the Gordon's Grocery and Town and County Furniture stores were several feet under water. WFO Glasgow rainfall total was 1.15 inches in 25 minutes.
What these are
- Heavy Rain
- Rainfall totals unusual for the place and season that did not produce a flood.
- 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.
- Flash Flood
- Flooding that begins within six hours of the rain that causes it, or of a dam or levee failure or ice jam release, often with deadly speed.
After NWS Directive 10-1605, the rules offices file Storm Data by.
The same day elsewhere
- Lightning Strike in Illinois, July 28, 2010
- Rip Current in Texas, July 28, 2010
- Hail and Damaging Winds in Florida, July 28, 2010
- Flash Flooding and Damaging Winds in Illinois, July 28 to 29, 2010
- Flash Flooding and Heavy Rain in Washington, July 28, 2010
- Flooding in Iowa, July 28 to 31, 2010
- Wildfire in Idaho, July 28, 2010
- Damaging Winds in New York, July 28, 2010
- Damaging Winds in Pennsylvania, July 28, 2010
- Hail and Damaging Winds in Ohio, July 28, 2010
- Damaging Winds in Michigan, July 28, 2010
- Flash Flooding in New Mexico, July 28, 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 2026-10-01. Each event’s entry at NCEI: 243806, 243811, 254924, 254928, 244633, 244634, 254945, 254946, 254947, 244643, 244640, 254931, 244644, 244645, 244648, 243803.