An early-season storm is going to glide through the western US and Canada during the first few days of October. This storm should bring snow to many mountains, with up to a foot possible.
From Sunday through Thursday, the storm's track should take it through the Pacific Northwest and then the northern Rockies. In the graphic below, keep your eye on the blue area that moves from left-to-right. This is the storm.
Temperatures during the storm won't be quite as cold as they usually are during mid-winter, but they will be cold enough for snow to fall down to 8,000 feet. During the cooler night-time period, and during the strongest snow squalls, the snow level may even decrease to 6,000 feet, especially in Wyoming, Montana, and Canada.
Early forecasts for total snowfall indicate the potential for up to about 12 inches, and I wouldn't be surprised if more than one foot fell on the higher elevations of western Wyoming and Montana.
Yay for snow in the forecast!