1 day ago Bob Ambrose A NW flow developed as expected, bringing colder air and snow showers across NW and SW Montana’s mountains. As of 8 AM Thanksgiving, an inch fell overnight at Big Sky, Whitefish, Disco, and Lookout. Another pulse on Friday could add similar accumulations across the mountains along and north of I-90. Dry, cool, and cloudy this weekend as the ridge builds, then becomes warmer next week.