Partly cloudy to mostly clear skies tonight, with valley fog forming late. Dry and warmer on Saturday with early morning fog. A series of upper level disturbances, along with a weak surface front, will interact with incoming moisture to produce showers and storms across the area. The rain will begin sometime on Sunday and occur off and on through Monday, with widespread rain on tap to begin the new work week. Hot and muggy conditions will be in place on Sunday as well. Much cooler on Monday.