TONIGHT…Mostly cloudy this evening, then becoming partly cloudy. Patchy frost after midnight. Much cooler with lows in the lower 30s. West winds 15 to 20 mph with gusts up to 30 mph, becoming northwest 5 to 10 mph with gusts up to 20 mph after midnight. SUNDAY…Areas of frost in the morning. Sunny. Highs in the upper 50s. Northeast winds around 5 mph, becoming south in the afternoon. SUNDAY NIGHT…Mostly clear in the evening, then mostly cloudy with a slight chance of showers after midnight. Not as cool with lows in the mid 40s. South winds around 10 mph. Chance of rain 20 percent.