The National Weather Service has upgraded the Winter Storm Watch to a Winter Storm Warning. They have also extended the Winter Weather Advisory. A strong cold front is expected to move in this afternoon, which will turn rain to snow and drop snow levels.
10-20″ of snow is expected to fall in the Winter Storm Warning region.
6-10″ of snow is expected to fall in the Winter Weather Advisory region.
NOAA Has Issued A Winter Storm Warning For:
NOAA Has Issued A Winter Weather Advisory For:
The highest snow accumulations are expected to occur above 6,000ft, but snow levels are expected to drop to 4,000ft.
Additional Storm Info:
Montana (Winter Storm Warning): 10-20″ of Snow Above 8,000ft Today – Friday
* SNOW ACCUMULATION...10 to 20 inches, greatest above 8000 feet. - NOAA Billings, MT
Big Sky, MT (Winter Weather Advisory): 6-10″ of Snow Above 6,000ft Tonight – Friday Night
* Accumulations: Snow accumulation of 2 to 6 inches, with 6 to 10 inches possible above 6000 feet. - NOAA Great Falls, MT
Winter Weather Advisory For Big Sky, MT:
URGENT - WINTER WEATHER MESSAGE National Weather Service Great Falls MT 314 AM MDT Thu Sep 21 2017 ...Snow to return across higher elevations tonight into Friday morning... .A large upper level disturbance will return snow across southern Montana this evening...spreading northward through the overnight hours. Snow may then continue through Friday morning before lifting into the higher elevations. Generally 1 to 4 inches of snow are possible above 4000 feet...with 4 to 8 inches above 6000 feet...and some locally higher amounts across the higher mountain peaks. ...WINTER WEATHER ADVISORY IN EFFECT FROM 6 PM THIS EVENING TO MIDNIGHT MDT FRIDAY NIGHT FOR ELEVATIONS ABOVE 5500 FEET... The National Weather Service in Great Falls has issued a Winter Weather Advisory For elevations above 5500 feet for periods of moderate to heavy snow, which is in effect from 6 PM this evening to midnight MDT Friday night. * Locations: Locations above 4500 feet including Kings Hill, Bozeman, Monida, Raynolds, and other mountain passes * Timing: Rain and higher elevation snow will develop today, with widespread snow down to 5500 feet expected by late this evening through Friday morning. Snow above 6000 feet is then expected for the remainder of Friday. * Accumulations: Snow accumulation of 2 to 6 inches, with 6 to 10 inches possible above 6000 feet. * Winds: Northeast 10 to 20 mph with gusts up to 30 mph. * Visibilities: Below a mile at times in the heavier snow and wind. * Snow Level: 6500 feet lowering to 5500 feet. * Impacts: The heavy snow will make mountain roads and passes difficult to travel and may produce widespread power outages due to the weight of the snow on tree limbs and power lines. Those with outdoor interests should plan for the return of winter conditions.