Bands of snow showers developed across the region due to a fairly strong upper level northwest jet and unstable conditions from Tuesday November 5th through early Wednesday November 6th. Anywhere from 1 to 6 inches of snow fell with these showers and caused roads to be slick leading to multiple vehicular accidents across western and northwestern Montana.

Winter Weather in POTOMAC / SEELEY LAKE REGION, MONTANA
From 05-NOV-13 16:17:00 to 06-NOV-13 06:17:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

The Seeley Lake HADS sensor at 4,100 ft. reported 0.23 of total precipitation with temperatures around 29 degrees F between Nov. 5 and 6. A weather spotter located 1.6 miles east of Seeley Lake reported 2.8 of snowfall. They reported that the roads were slushy. The Greenough Hill MTDOT sensor reported road temperatures at freezing from 7 pm MST Nov 5 through 8:33 am MST on Nov 6. Other snowfall totals include: 6 1 mi. south of Condon, 5 Kraft Creek SNOTEL 7.5 mi. southwest of Condon, 5 Potomac, and 1.5 Bonner. The Missoula County dispatch reported a vehicle accident near mile marker 107 on I-90 east of Missoula on the morning of Nov. 6th.

Winter Weather in BITTERROOT / SAPPHIRE MOUNTAINS, MONTANA
From 05-NOV-13 13:40:00 to 06-NOV-13 08:24:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Department of Highways

Snow developed by 1:40 pm MST at Lolo Pass and by 5:30 pm MST at Lost Trail Pass. The snow ended around 7:30 am MST on November 6th. The highway sensor at Lolo Pass reported slick conditions from 3:38 pm MST on 11/5 through 8:24 am MST on 11/6. The highway sensor at Lost Trail Pass reported slick conditions from 8:30 pm MST on 11/5 through 6:30 am MST on 11/6. The Lolo Pass SNOTEL reported 3 of storm snowfall while the Saddle Mountain SNOTEL near Lost Trail received 2 of snow.

Winter Weather in BUTTE / BLACKFOOT REGION, MONTANA
From 05-NOV-13 15:00:00 to 06-NOV-13 10:00:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Department of Highways

MacDonald Pass on US-12 at milepost 27.9 reported snow from the evening of Nov. 5th through the morning hours of Nov. 6th. Winds were steady 15 to 21 mph with gusts up to 33 mph. Visibility data is not available, but one web cam image from 7 am MST on Nov. 6th indicated blowing snow reducing visibility less than one mile while the roads appeared snow-covered. Media reported 2 inches of snowfall in Bearmouth and 3 inches by Divide (I-15 southwest of Butte).

Winter Weather in MISSOULA / BITTERROOT VALLEYS, MONTANA
From 05-NOV-13 14:12:00 to 06-NOV-13 10:00:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Department of Highways

Showers brought 1 to 3 inches of snow from Tuesday November 5th through November 6th causing roadways to become slick. There were 7 vehicle accidents reported in Missoula between 6 pm MST Nov. 5th through 3 am MST Nov. 6th. Several of these wrecks occurred on the bridges along Reserve St. with no significant injuries reported. A NWS employee reported snow covered and slick roadways on US-93 from Florence north to Missoula between 5 and 7 am MST on November 6th. Snowfall totals include: 1.5 Missoula Int. Airport, 2 Missoula, 2.5 2 mi. northeast of Missoula, 3 Florence, Trace from Stevensville to Hamilton.

Winter Weather in KOOTENAI/CABINET REGION, MONTANA
From 05-NOV-13 20:51:00 to 06-NOV-13 07:51:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Social Media

Broadcast media on Facebook reported an estimated 3.3 inches of snowfall in Eureka. Temperatures remained at 30 degrees F during the snowfall while roads became slick.

Winter Weather in WEST GLACIER REGION, MONTANA
From 05-NOV-13 19:35:00 to 06-NOV-13 07:35:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

A person from the public in Essex reported an estimated 2 of snowfall that fell in 12 hours. The West Glacier COOP observer reported 2.1 of snow with 0.17 of precipitation on November 6th.

Winter Weather in FLATHEAD/MISSION VALLEYS, MONTANA
From 05-NOV-13 17:55:00 to 06-NOV-13 09:00:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Official NWS Observations

The Glacier Park International Airport reported 3 of snowfall through 5 am MST on Nov. 6th. Multiple vehicle slide-offs and accidents were reported in the Kalispell area. Other snow totals from this storm include: Kalispell 1.8, Whitefish 4, Bigfork/Ferndale 3.8, Creston 2.8, Lake Blaine 3.5, 1 mi. SW Columbia Falls 5, 4 mi. southeast Charlo 1.5, and Ronan 2.

Winter Weather in LOWER CLARK FORK REGION, MONTANA
From 05-NOV-13 09:04:00 to 06-NOV-13 09:53:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Department of Highways

Snow developed during the morning of Tuesday November 5th at Lookout Pass on Interstate 90, on the border of Idaho and Montana. It continued through much of the night and ended Wednesday morning. Web cams at the pass depicted slick road conditions especially during the night-time hours.