WEATHER ALERT DAY: Heavy snowfall, travel impacts continue for parts of southwest Montana
Weather Alert Day: Bozeman and surrounding areas as heavy, wet snowfall continues into Wednesday morning. Snowfall rates and travel impacts are expected to increase beyond sunset, especially over mountain passes.
Moisture wrapping around an area of low pressure will continue to keep rain and snow showers ongoing area wide as it tracks southeast through the region this evening. For areas west of the divide such as the Butte/Blackfoot and Seeley Lake/Potomac Regions winter driving conditions will continue through about midnight, especially over mountain passes.
After that, the focus for this storm system returns to southwest Montana, specifically Gallatin and Madison Counties. Occasionally heavy snowfall is anticipated overnight in these areas.
Additional accumulations of 1-5" remain possible in the Gallatin and Madison Valleys while at pass level and higher, 5-10" are expected.
Winter Storm Warnings remain in effect in through 6 a.m. Wednesday.
Showery weather continues Wednesday afternoon.
Wednesday night into Thursday will see the best chance for light snowfall accumulations as a backdoor cold front slides into northwest Montana. This is most likely to impact the Flathead Valley with up to 2" of snowfall.
Seasonal temperatures will continue, with most valley areas observing highs in the mid 40s to low 50s.
This weekend, high pressure will begin to build over the region leading to drier conditions and a decent warm up with highs in the 60s and potentially low 70s.
WINTER STORM WARNING until 6 AM Wednesday for the Big Belt, Bridger and Castle Mountains, Gallatin Valley, Gallatin and Madison County Mountains and Centennial Mountains. This warning includes the following locations: Bozeman Pass, Gallatin Gateway, Targhee Pass, Bozeman, Raynolds Pass, West Yellowstone, Battle Ridge Pass, Trident, Deep Creek Pass, Maudlow, and Big Sky. Additional snow accumulations of 2 to 5 inches at lower elevations, and 5 to 10 inches in the mountains.
WINTER STORM WARNING until midnight tonight for the Southern Rocky Mountain Front, Upper Blackfoot and MacDonald Pass, Elkhorn and Boulder Mountains. Including the following locations: Rogers Pass, Wickes, MacDonald Pass, Boulder, Corbin, Montana City, Clancy, Homestake Pass, Flesher Pass, Lincoln, Elk Park Pass, and Marysville. Additional snow accumulations between 3 and 6 inches.
WINTER WEATHER ADVISORY until midnight tonight for the Potomac/Seeley Lake Region. Total snow accumulations between 1 and 2 inches for lower elevations with 5 to 10 inches in the mountains. The higher elevations of the Mission Mountains could receive over a foot of snow.
WINTER WEATHER ADVISORY until midnight tonight for the Butte/Blackfoot Region. Total snow accumulations between 2 and 4 inches for lower elevations with 5 to 10 inches on the passes. Snowfall rates up to 1 inch per hour with heavier showers this evening through Tuesday.
WINTER WEATHER ADVISORY until midnight tonight for Northwest Beaverhead County. This includes Dewey, Wisdom, Chief Joseph Pass, Wise River, and Big Hole Pass. Additional snow accumulations of 1 to 3 inches.
WINTER WEATHER ADVISORY until 6 AM Wednesday for Helena Valley, Canyon Ferry Area, Missouri Headwaters, Madison River Valley. This includes Pony, Jeffers, Harrison, Cameron, Three Forks, Toston, Townsend, Norris, Willow Creek, Ennis, Helena, Winston, McAllister, and Whitehall. Additional snow accumulations 2 to 4 inches.
