Northern Rockies winter storm, Oct 10–12
Up to 20 inches of snow and gusts to 50 mph in Montana.
24 forecast zones warned by 3 National Weather Service offices. This storm is over; below is what was warned.

Where it's warned, and what to expect
- Winter Storm Warning· NWS Billings MT(ended)
Absaroka/Beartooth Mountains and Crazy Mountains.
What: Periods of heavy snow and blowing snow. Total snow accumulations between 10 and 18 inches. Winds gusting up to 35 mph.
When: to
Impacts: Plan on slippery road conditions. Recreation in the high country will be impacted by heavy accumulating snow.
- Winter Storm Warning· NWS Missoula MT(ended)
MacDonald Pass, Homestake Pass, Highway 12 Garrison to Elliston, Georgetown Lake, and Butte.
What: Heavy snow expected. Total snow accumulations between 3 and 9 inches. Snow totals of 12-18 inches in the higher mountain areas. Winds gusting as high as 45 mph.
When: to
Impacts: Travel could be very difficult.
- Winter Storm Warning· NWS Great Falls MT(ended)
Cascade County below 5000ft, Eastern Pondera and Eastern Teton, Fergus County below 4500ft, and Judith Basin County and Judith Gap.
What: Heavy, wet snow expected. Total snow accumulations between 10 and 20 inches, with the highest amounts in the mountains south of US Highway 2. Winds gusting as high as 50 mph.
When: to
Impacts: Plan on slippery road conditions.
Get warned where you are
From the National Weather Service's Winter Storm, Blizzard and Ice Storm Warnings. The NWS doesn't name winter storms; Atmostorm names them by where and when. Not an official source: follow your local officials and weather.gov.