(1 of 2) * WHAT...Heavy snow expected. Total snow accumulations between 3 and 7 inches. Winds gusting as high as 40 mph. * WHERE...Eastern Glacier, Western Toole, and Central Pondera Counties, Eastern Toole and Liberty Counties, and Northern High Plains. * WHEN...From 5 AM Saturday to 5 AM MST Sunday. * IMPACTS...Plan for winter driving conditions. Snow and blowing snow may cause periods of localized blizzard conditions Saturday afternoon and evening. (2 of 2) * WHAT...Heavy snow expected. Total snow accumulations ranging from 4 inches on the foothills up to 12 inches on mountain peaks. 6 to 9 inches of snowfall possible on Marias Pass. * WHERE...East Glacier Park Region Zone. * WHEN...Until 5 AM MST Sunday. * IMPACTS...Travel could be very difficult. Tire chains may be required for some vehicles if traveling through mountain passes. Those in the backcountry should ensure they are prepared for dangerous conditions. Snow and blowing snow may significantly reduce visibility at times, especially Saturday afternoon and evening.