TONIGHT…Mostly cloudy. Isolated snow showers this evening, then scattered snow showers after midnight. Little or no snow accumulation. Lows in the mid 20s. Northwest winds 10 to 15 mph. Chance of snow 30 percent. TUESDAY…Partly sunny in the morning, then clearing. Highs in the lower 40s. Northwest winds 10 to 15 mph. TUESDAY NIGHT…Clear. Widespread frost after midnight. Lows in the lower 20s. North winds 5 to 10 mph.