Hail, Glacier
- When
- July 26, 2:39 PM MST
- Where
- Glacier County, 5 mi SE of St Mary
- Measured
- 1 in hail
- Reported by
- Trained Spotter
- Coordinates
- 48.699, -113.342
Spotter reported quarter-size hail 5-miles SE of Saint Mary.
A thunderstorm developed via daytime heating of higher terrain in Waterton Lakes National Park, Alberta during the early afternoon of July 26th. As this storm moved southeastward, it became supercellular and produced quarter-size hail near Saint Mary.
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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.
The episode as NWS TFX wrote it up.
A thunderstorm developed via daytime heating of higher terrain in Waterton Lakes National Park, Alberta during the early afternoon of July 26th. As this storm moved southeastward, it became supercellular and produced quarter-size hail near Saint Mary.
The Missoula radar (KMSX), 190 km away, was scanning. The volume nearest the first event began at 21:39 UTC.
1 hail. Local standard time, as filed.
Spotter reported quarter-size hail 5-miles SE of Saint Mary.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Montana in 2018Every state in 2018This day in weather historyWarnings in Montana, July 2018
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: 760413.