Montana, 2017Heavy Snow in Montana, September 13 to 14, 2017
September 13 to 14, 2017 · NWS MSO · 1 event in 1 county or zone
A large trough with a subtropical moisture feed brought heavy snow to the mountains of western Montana. Interstate 90 was closed for a period due to the snow.
Every event with a place to put it; 1 filed by county or forecast zone are drawn at its center, in a lighter ring. Tap one for its entry below.
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- Deaths
- 1
- Injuries
- 2
- Property damage
- $1,000
- 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.
A large trough with a subtropical moisture feed brought heavy snow to the mountains of western Montana. Interstate 90 was closed for a period due to the snow.
What forecasters said that day
The local office's own words before the first event, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.
NWS Missoula, MT wrote its last area forecast discussion before the first event at Sep 13, 2:09 PM MST, 6 hours 51 minutes earlier.
Area forecast discussion, Sep 13, 2:09 PM MST, 6 hours 51 minutes before
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</html>Heavy Snow, Lower Clark Fork Region
- When
- September 13, 9:00 PM MST to September 14, 2:00 AM MST
- Where
- Lower Clark Fork Region forecast zone
- Deaths
- 1 direct, 0 indirect
- Injuries
- 1 direct, 1 indirect
- Property damage
- $1,000
- Reported by
- Department of Highways
- Coordinates
- 47.286, -114.685 (the zone’s center; the record gives no point)
Lookout Pass received 15 inches of snow within 12 hours and this created hazardous conditions. Montana Department of Transportation closed I-90 for 6 hours from 1 am to 5 am MST.
- 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.
- Rip Current in Florida, September 13, 20171 death · 1 event
- Hail and Damaging Wind in Kansas, September 13, 2017$3,000 · 74 kt wind · 2 events
- Tornado in Nevada, September 13, 2017EF0 · 2 events
- Debris Flow and Heavy Rain in California, September 13, 20172 events
- Damaging Wind and Lightning Strike in Nevada, September 13, 2017$10,000 · 62 kt wind · 2 events
- High Wind in Alaska, September 13, 201752 kt wind · 1 event
- Waterspout in Gulf of Mexico, September 13, 20171 event
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: 718420.