TONIGHT…Mostly cloudy. A chance of sprinkles this evening. Patchy frost after midnight. Cooler with lows in the upper 20s. Northwest winds 10 to 15 mph. SATURDAY…Patchy frost in the morning. Partly sunny. Highs in the upper 40s. Northeast winds around 5 mph. SATURDAY NIGHT…Showers. Lows in the upper 30s. East winds 5 to 10 mph. Chance of rain 80 percent.