Heavy Mountain Snow in the Northwest U.S.; Wintry Mix in the Northeast U.S.

Partly cloudy in the evening then becoming mostly cloudy. At lower elevations, patchy fog through the night. Areas of frost in the late evening and overnight, a chance of rain late in the night, a chance of rain late in the night. At higher elevations, widespread frost and patchy fog through the night, a slight chance of snow late in the night, a slight chance of snow late in the night. Lows 19 to 34 higher elevations...32 to 42 lower elevations. Snow level 6000 feet. Light winds.

At lower elevations, rain showers likely and a slight chance of thunderstorms in the evening, rain showers likely and a slight chance of thunderstorms in the evening, then a chance of rain and snow after midnight, patchy fog through the night, rain showers likely and a slight chance of thunderstorms in the evening. A chance of rain and snow after midnight. At higher elevations, a chance of snow in the evening, then snow likely after midnight, a chance of snow in the evening, then snow likely after midnight. Colder. Lows 11 to 26 higher elevations... 23 to 33 lower elevations. Little or no snow accumulation lower elevations...2 to 4 inches higher elevations. Snow level 5500 feet decreasing to 4000 feet after midnight. Prevailing southwest winds up to 10 mph with gusts to around 30 mph. Over ridges, prevailing southwest winds 5 to 15 mph increasing to 10 to 25 mph after midnight.

Clear. Lows 13 to 28 higher elevations...26 to 35 lower elevations. Prevailing northeast winds up to 15 mph with gusts to around 30 mph.

Clear. Lows 20 to 35.

Mostly cloudy. Lows 25 to 40. Highs 44 to 59.

Sunny. Highs 47 to 62.