* WHAT. For the Winter Weather Advisory, snow expected. Likelihood of minor to moderate impacts from around 1 to 3 inches of snow is 100 percent, and 3 to 6 inches of snow is 80 percent above 4000 feet, including Lookout Pass. For the Winter Storm Watch, heavy snow possible. Chance of moderate to major impacts from snow is at least 50 percent above 4000 feet. Total snow accumulations 7 to 14 inches possible above 4000 feet and over Lookout Pass. Winds could gust as high as 45 mph. * WHERE. I-90 Lookout Pass to Haugan, Highway 200 Thompson Falls to Plains, Evaro Hill, and Highway 200 Trout Creek to Heron. * WHEN. For the Winter Weather Advisory, until 11 AM MST Sunday. For the Winter Storm Watch, from Monday morning through Tuesday afternoon. * IMPACTS. For MODERATE impacts from snow, expect disruptions to normal activities. Hazardous traveling conditions. Use extra caution while driving. Closures and disruptions to infrastructure may occur. For MAJOR impacts from snow, expect considerable disruptions to normal activities. Dangerous or impossible traveling conditions. Avoid travel in the impacted areas if possible. Widespread closures and disruptions to infrastructure may occur. The hazardous conditions could impact the Monday morning and evening commutes, especially over higher passes. Gusty winds could bring down tree branches.
