Montana, 2012

Heavy Snow and Winter Weather in Montana, January 10 to 11, 2012

January 10 to 11, 2012 · NWS MSO · 3 events in 3 counties and zones

A complex winter storm moved across western Montana, producing snow, rain, and areas of freezing rain.

Where it happened

Every event with a place to put it; 3 filed by county or forecast zone are drawn at its center, in a lighter ring. 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

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The toll

Deaths
0
Injuries
0
Property damage
$3,000
Crop damage
None recorded
Events
3

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 complex winter storm moved across western Montana, producing snow, rain, and areas of freezing rain.

The radar

The national radar mosaic for the moment the first event began.

Open the radar archive at this moment

Event by event

2 heavy snow, 1 winter weather. Local standard time, as filed.

Winter Weather, Bitterroot / Sapphire Mountains

When
January 10, 11:00 AM MST to 3:00 PM MST
Where
Bitterroot / Sapphire Mountains forecast zone
Property damage
$3,000
Reported by
Department of Highways
Coordinates
46.508, -113.828 (the zone’s center; the record gives no point)

An accident involving three semi trucks occurred on Highway 12, 13 miles west of Lolo, after light freezing rain fell in the area. This caused a short closure of Highway 12.

Heavy Snow, West Glacier Region

When
January 10, 8:00 PM MST to January 11, 10:08 AM MST
Where
West Glacier Region forecast zone
Reported by
Department of Highways
Coordinates
47.971, -114.069 (the zone’s center; the record gives no point)

Twelve inches of snow, falling over an 18 hour period, was measured at Marias Pass.

Heavy Snow, Missoula / Bitterroot Valleys

When
January 10, 11:00 PM MST to January 11, 1:00 AM MST
Where
Missoula / Bitterroot Valleys forecast zone
Reported by
Law Enforcement
Coordinates
46.560, -114.023 (the zone’s center; the record gives no point)

Law enforcement measured 2.5 inches of snow, falling in two hours, at Hamilton in Ravalli County.

What these are

Winter Weather
Snow, sleet or freezing rain below warning levels that still caused disruption, damage or casualties.
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

More

Every storm in Montana in 2012Every state in 2012This day in weather historyWarnings in Montana, January 2012

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: 391803, 359772, 359771.