WEATHER ALERT DAY: It was a brutal start to the day with temperatures well below zero across all of western Montana. Temperatures are struggling to warm even now, with much of western Montana expected to remain in the single digits above and below zero. Northwest Montana will be slightly warmer. Sub-zero lows are expected again tonight, but temperatures will begin to warm heading into Tuesday afternoon.

Early tomorrow, a few scattered light snow showers will move in. This will mainly just be a light accumulation for valleys and up to a couple of inches in the higher terrain. Tuesday into Wednesday will feature another round of light snow showers across the area. The two day total for most valleys will remain light with just a trace to 2" expected, although around Flathead lake up to a few inches can be expected. Roads will be slick over the next few days with light snow and frigid temperatures in place.

For Wednesday onward, temperatures will increase to the 20s and 30s with valley inversions, freezing fog and stable conditions. A round of light snow is expected Friday and into Saturday.

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WIND CHILL ADVISORY in effect through noon Monday Upper Blackfoot, Snowy and Judith Mountains, Big Belt, Bridger and Castle Mountains, Elkhorn and Boulder Mountains, Northwest Beaverhead County -- Including the following locations: Maudlow, Bozeman Pass, Flesher Pass, Lincoln, Wickes, Trident, Clancy, Wisdom, Boulder, Deep Creek Pass, Corbin, Homestake Pass, MacDonald Pass, Elk Park Pass, Marysville, Wise River, Battle Ridge Pass, Montana City, Dewey, Chief Joseph Pass, and Big Hole Pass -- Gallatin and Madison County Mountains and Centennial Mountains -- Including the following locations: Raynolds Pass, Big Sky, West Yellowstone, and Targhee Pass -- Madison River Valley and Gallatin Valley -- Including the following locations: Norris, Bozeman, McAllister, Cameron, Ennis, Ringling, and Gallatin Gateway. Very cold wind chills as low as 35 below zero expected.