OVERNIGHT…A slight chance of thunderstorms. Showers. Not as cool. Near steady temperature in the mid 50s. Southwest winds 15 to 20 mph with gusts up to 40 mph. Chance of rain 90 percent. SATURDAY…Partly sunny with a chance of showers in the morning, then sunny in the afternoon. Highs in the mid 50s. Temperature falling to around 40 in the afternoon. Northwest winds 10 to 15 mph with gusts up to 30 mph. Chance of rain 40 percent. SATURDAY NIGHT…Partly cloudy in the evening, then becoming mostly cloudy. Much cooler with lows in the mid 20s. Northwest winds 5 to 10 mph, becoming northeast after midnight.