Hail, Flathead
- When
- July 21, 7:30 PM MST to 7:40 PM MST
- Where
- Flathead County, Kalispell
- Measured
- 1 in hail
- Coordinates
- 48.200, -114.320
Hail in Montana, July 21, 1997
A thunderstorm caused nickel sized hail in Kalispell, plus wind gusts estimated to 55 mph which caused a boat to swamp and sink on Flathead Lake (14 miles southeast of Kalispell) along with overturned rafts.
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
- 1
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 MSO wrote it up.
A thunderstorm caused nickel sized hail in Kalispell, plus wind gusts estimated to 55 mph which caused a boat to swamp and sink on Flathead Lake (14 miles southeast of Kalispell) along with overturned rafts.
The radar
The national radar mosaic for the moment the first event began.
Event by event
1 hail. Local standard time, as filed.
What these are
- Hail
- Hail three-quarters of an inch or larger, or smaller hail that caused damage, filed with the largest stone measured.
After NWS Directive 10-1605, the rules offices file Storm Data by.
The same day elsewhere
- Flash Flood and Hail in Oklahoma, July 21, 1997
- Damaging Wind in Montana, July 21, 1997
- Lightning Strike in Wisconsin, July 21, 1997
- Flash Flooding in Alabama, July 21 to 22, 1997
- Damaging Winds and Lightning Strike in Virginia, July 21, 1997
- Flash Flooding and Hail in Oklahoma, July 21, 1997
- Lightning Strikes in Pennsylvania, July 21 to 22, 1997
- Lightning Strike in North Carolina, July 21, 1997
- Damaging Wind in South Dakota, July 21, 1997
- Damaging Wind in New Mexico, July 21, 1997
- Damaging Wind in Tennessee, July 21, 1997
- Flash Flood in North Carolina, July 21, 1997
More
Every storm in Montana in 1997Every state in 1997This day in weather historyWarnings in Montana, July 1997
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: 5612756.