Winter Storm, Gallatin
- When
- November 3, 7:00 AM MST
- Where
- Gallatin forecast zone
- Reported by
- Public
Social media report of an estimated 24 hour storm total snowfall total of 9 inches of snow.
Winter Storm and Heavy Snow in Montana, November 3, 2017
A weak warm front across south-central MT, in conjunction with a shallow cold air mass and developing overriding precipitation caused widespread snowfall Thursday through Friday. By Friday, widespread snowfall remained in place due to a passing upper-level disturbance.
The toll
- Deaths
- 0
- Injuries
- 0
- Property damage
- None recorded
- Crop damage
- None recorded
- Events
- 8
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 weak warm front across south-central MT, in conjunction with a shallow cold air mass and developing overriding precipitation caused widespread snowfall Thursday through Friday. By Friday, widespread snowfall remained in place due to a passing upper-level disturbance.
Event by event
4 winter storm, 4 heavy snow. Local standard time, as filed.
Winter Storm, Beaverhead
- When
- November 3, 8:00 AM MST
- Where
- Beaverhead forecast zone
- Reported by
- Public
Media report storm total snowfall of 14.8 inches measured by viewer (2 day total).
Heavy Snow, Southern Rocky Mountain Front
- When
- November 3, 10:00 AM MST
- Where
- Southern Rocky Mountain Front forecast zone
- Reported by
- Social Media
Social media report of a car sliding off the road near a residence 22 miles WNW of Choteau.
Heavy Snow, Jefferson
- When
- November 3, 10:20 AM MST
- Where
- Jefferson forecast zone
- Reported by
- Social Media
Social media report from MDOT of a jack-knifed semi truck on I-90 on Homestake Pass.
Heavy Snow, Southern Lewis and Clark
- When
- November 3, 2:38 PM MST
- Where
- Southern Lewis and Clark forecast zone
- Reported by
- Public
Traffic map indicated dangerous driving conditions along I-15 near Helena.
Winter Storm, North Rocky Mountain Front
- When
- November 3, 4:11 PM MST
- Where
- North Rocky Mountain Front forecast zone
- Reported by
- Public
Social media report of 8 inches of snowfall.
Heavy Snow, Cascade
- When
- November 3, 5:02 PM MST
- Where
- Cascade forecast zone
- Reported by
- Social Media
Twitter report of 2 semis stuck on the I-15 southbound ramp in Great Falls.
Winter Storm, Hill
- When
- November 3, 7:00 PM MST
- Where
- Hill forecast zone
- Reported by
- Trained Spotter
Trained spotter reported 3.3 inches of new snow in 3 hours.
What these are
- Winter Storm
- A storm that brought snow, sleet or freezing rain at warning levels, usually over several hours or days.
- Heavy Snow
- Snowfall reaching the local warning threshold without the other hazards of a winter storm.
After NWS Directive 10-1605, the rules offices file Storm Data by.
The same day elsewhere
- Hail in Mississippi, November 3, 2017
- Hail and Damaging Wind in Arkansas, November 3, 2017
- Winter Storm in Wyoming, November 3 to 5, 2017
- Heavy Snow in Idaho, November 3 to 5, 2017
- Hail and Damaging Wind in Texas, November 3, 2017
- Heavy Snow in California, November 3 to 4, 2017
- Hail in Arkansas, November 3, 2017
- Hail in Mississippi, November 3, 2017
- Hail in Louisiana, November 3, 2017
More
Every storm in Montana in 2017Every state in 2017This day in weather historyWarnings in Montana, November 2017
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: 725497, 725499, 725846, 725847, 725850, 725501, 725849, 725503.