While a surface low tracked northeast into British Columbia during the morning of February 14th, moist and relatively milder air streamed over Idaho and western Montana. The warm front brought brief periods of intense snowfall across much of the area causing low visibilities for a brief time and slick roadways. After the warm front moved through, the air-mass became unstable with strong westerly winds aloft. This helped to form fairly organized graupel, snow and rain bands, some of which brought moderate impacts to area mountain passes. A ridge of high pressure moved in at night causing temperatures to cool and black ice to form.

Winter Weather in BITTERROOT / SAPPHIRE MOUNTAINS, MONTANA
From 14-FEB-14 07:40:00 to 15-FEB-14 07:00:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Department of Highways

Periods of moderate snow fell at both Lolo and Lost Trail Passes especially associated with the warm front precipitation during the morning of Feb. 14th. Snow and rain bands had developed by the afternoon which brought brief periods of limited visibility. A rock slide occurred on Skalkaho highway 38 at mile-marker 7 around 5:53 pm MST blocking both lanes. It was subsequently cleared by 7 pm MST. The Lost Trail ski resort reported 8 of new snow 24 hours ending at 5:58 am MST Feb. 15. The Lolo Pass SNOTEL reported 4 of total snowfall.

Winter Weather in FLATHEAD/MISSION VALLEYS, MONTANA
From 14-FEB-14 09:00:00 to 14-FEB-14 14:30:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Official NWS Observations

Snow began in the Kalispell area by 9:45 am MST on Feb. 14 and ended a little after 1 pm MST. The Glacier Park International Airport reported a period of heavy snow with 1 falling in a ten minute period ending 10:23 am MST. This sudden change brought very low visibilities and snow-covered roads to much of the Flathead Valley. The Flathead County 911 dispatch reported 6 motor vehicle accidents between 10 and 11 am MST with a few of those being slide-offs. MTDOT reported snow-covered roads through the afternoon hours from Yellow Bay to Creston on Highway 35 and on Highway 206 north to Columbia Falls. Snowfall amounts include: 1.4 at Glacier Park Int. Airport, 3 Columbia Falls and 1 near Blue Bay on the east side of Flathead Lake.

Winter Weather in LOWER CLARK FORK REGION, MONTANA
From 14-FEB-14 07:40:00 to 15-FEB-14 07:00:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Department of Highways

A moist and strong warm front brought a relatively brief period of heavy snow to Lookout Pass on I-90 from 9 am to 12 pm on Feb. 14. This impacted travelers with low visibilities and slick, snow-covered roads. Throughout the day there were periods of snow and rain from bands that brought limited impacts. Two separate jack-knifed trucks were reported due to slick road conditions Friday evening, one at mile-marker 3 at 7:52 pm MST and another at mile-marker 24.5 at 4:54 pm MST.  By nightfall the skies cleared out and temperatures fell into the 20's helping to develop black ice. Another tractor trailer jack-knifed on the west bound lane at mile-marker 58 or 4.3 miles  north-northwest of Tarkio on I-90 at 1:15 am MST on Feb. 15. This incident blocked blocked both lanes until 2:36 am MST and was finally cleared by 3:22 am MST.

Winter Weather in KOOTENAI/CABINET REGION, MONTANA
From 14-FEB-14 09:30:00 to 14-FEB-14 13:30:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Slush and snow-covered roads were reported across much of Lincoln County during the morning into the afternoon hours on Feb. 14. A person from the public located in Olney reported 2 of heavy snow two hours ending at 10:49 MST. Whitefish Mountain Ski Resort reported a total of 3 at their base elevation 4,464 ft. 24 hours ending 5:50 am MST on Feb. 15.