In the last week many western resorts saw their first snows of the season, with a few locations getting dumped with 1-3 feet. The next several weeks could bring a continued trend for additional systems to impact the Pacific Northwest and especially the northern Rockies. Models are only somewhat accurate in the 7 day maps below with more variance beyond that period. Currently we are confident on colder temperatures for much of the Northern and central Rockies as well as occasional low pressure systems impacting the West in the next 5 days. Significant snowfall is likely in northern Montana over the next several days as well as interior Canada (1-2 feet possible).
The west will once again be in a cool, wet pattern that could last through the middle of next month. Two troughs will impact the region over the next 10 days, both bringing chances for high elevation snow. The first system will move in this weekend and the second likely toward the middle/end of next week.
Below: Higher chances of low pressure impacting much of the Pacific Northwest and Rockies late September/through October 2nd. Image: Weather Bell
Below: Higher chances of low pressure impacting much of the northern Rockies through October 7th. Map: Weatherbell
Below: Total possible snowfall for higher elevations of the west through October 9th (Variance to models this far out will exist). Amounts will be fine tuned with each additional posts. Image: Weatherbell
There is a possibility of a third round of unsettled weather the following weekend as well. Meanwhile, throughout this period, colder than average temperatures will persist throughout the west.