HIGH WIND WATCH Saturday for Gallatin, Madison, Broadwater and Jefferson Counties in southwest Montana. This includes the Bozeman area. West southwest winds 20 to 40 mph with gusts in excess of 50 mph.
WINTER WEATHER ADVISORY for most passes along the divide and Idaho border. Snowfall of 3 to 8 inches.
A vigorous storm system will march through western Montana late Friday night and Saturday. Winds will increase by Saturday. Outside of the watch area winds will still gust up to 25 mph. Snow will develop in the mountains. There will be a chance of valley rain and snow showers, mainly west of the divide. Down slope winds will limit valley precipitation. That may change by Saturday afternoon as snow bands develop. A quick inch or two of snow will be possible under the stronger bands. Lows in the 20s to lower 30s. Highs Saturday in the 30s to around 40.
Partly sunny on Sunday with lows in the 10s to lower 20s and highs in the 30s.
A calm and tranquil weather pattern is expected next week. Highs will soar above normal across southwest Montana around Butte and Bozeman, warming from the upper 30s to the 40s. Valley inversions will keep highs in the low to mid 30s in the Missoula and Kalispell areas until late week when highs will finally reach around 40.