* WHAT. Snow expected. Likelihood of minor impacts from snow is greater than 60 percent. Total snow accumulations below 4000 feet between 1 to 4 inches and above 4000 feet between 5 to 13 inches. Winds gusting as high as 45 mph in the higher elevations. * WHERE. Essex, Marias Pass, Polebridge, Bad Rock Canyon, and Highway 83 Bigfork to Swan Lake. * WHEN. From 11 PM Saturday to 11 AM MST Monday. * IMPACTS. Winter traveling conditions. For MINOR impacts from snow, expect a few inconveniences to normal activities. Use caution while driving. The hazardous conditions could impact the Monday morning commute, especially over higher passes. Gusty winds could bring down tree branches. * ADDITIONAL DETAILS. The heaviest snowfall is expected Sunday night during the passage of a cold front.