WINTER WEATHER ADVISORY valid until 11 a.m. Sunday for Bitterroot/Sapphire Mountains, particularly Lolo Pass and Highway 93 Sula to Lost Trail Pass. Snow expected. The probability of minor to moderate impacts is 100 percent with a snow depth of approximately 1 to 3 inches and 70 percent with a snow depth of 3 to 6 inches.

WINTER WEATHER ADVISORY in effect until 11 a.m. Sunday for the Lower Clark Fork region. Snow expected. The chance of minor to moderate impacts is 100 percent for snow depths of approximately 1 to 3 inches and is 80 percent for snow depths of 3 to 6 inches above 4,000 feet, including Lookout Pass.

WINTER WEATHER ADVISORY in effect until 10 a.m. Sunday for the northern Clearwater Mountains and southern Clearwater Mountains. Snow expected. Track to 2 inches below 3000 feet. The chance of moderate impacts of 3 to 6 inches of snow is more than 90 percent above 3,000 feet.

WINTER WEATHER ADVISORY valid until 8 a.m. Sunday for Gallatin and Madison County Mountains and Centennial Mountains – including the following locations: Targhee Pass, Raynolds Pass, West Yellowstone and Big Sky. Snow. Additional snow accumulations between 1 and 6 inches.

WINTER STORM WATCH effective Monday morning through Tuesday afternoon for the Northern Clearwater Mountains and Southern Clearwater Mountains areas. Heavy snowfall possible. The chance of moderate to severe impacts from snow is at least 50 percent. Total snow accumulations between 1 and 3 inches possible at low elevations and 6 and 14 inches possible above 4,000 feet. Wind gusts could reach up to 35 miles per hour.

WINTER STORM WATCH applies to the Lower Clark Fork region Monday morning through Tuesday afternoon. Heavy snowfall possible. The chance of moderate to severe impacts from snow is at least 50 percent above 4,000 feet. Total snow accumulations of 7 to 14 inches are possible above 4,000 feet and over Lookout Pass. Wind gusts can reach up to 45 miles per hour.

WINTER STORM WATCH applies to the West Glacier Region from Monday afternoon to Tuesday evening. Heavy snowfall possible. The chance of moderate to severe impacts from snow is at least 50 percent. Total snow accumulations between 1 and 4 inches possible below 4,000 feet and 7 and 14 inches possible above 4,000 feet. Wind gusts can reach up to 45 miles per hour.

WINTER STORM WATCH effective Monday afternoon through Tuesday evening for the East Glacier Park Region-Southern Rocky Mountain Front – including the following locations: Logan Pass, Kiowa, East Glacier Park, Saint Mary, Marias Pass, Rogers Pass and Babb. Heavy snowfall possible. Total snow accumulations between 2 and 11 inches are possible. When it starts snowing Monday, wind gusts of up to 70 miles per hour could occur.

WINTER STORM WATCH applies late Monday night through late Tuesday night for the Little Belt and Highwood Mountains – including the following locations: Kings Hill Pass, Neihart and Monarch. Heavy snowfall possible. Total snow accumulations between 1 and 10 inches are possible. When it begins to snow on Monday, wind gusts of up to 55 miles per hour could occur.

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Tonight we continue to see precipitation bringing scattered rain and snow to western Montana, with lows in the low to high 20s.

This could potentially lead to snow accumulations in valleys above 2,500 to 3,000 feet, but it will be quite brief. These rainy conditions will continue into tomorrow, but a weak ridge of high pressure will cause them to ease during the overnight hours.

Highs will be in the upper 30s to mid 40s.

There will be a strong depression moving through western Montana on Monday, bringing lots of snow to the mountain passes. This will particularly be the case along the Idaho-Montana border and Marias Pass.

This snow is expected to accumulate between 7 and 14 inches by Tuesday evening.

There will initially be less rainfall in the valleys, but rainfall will return from Tuesday afternoon to Wednesday. This could lead to an increased likelihood of traffic accidents in winter.