First Frost After a good rain event over the last few days, we will have a chance for our first frost of the season Tonight. A cold front came through last night and there will be some fairly strong cold air advection during the day Today. The winds will be gusty as the cold air comes in, but they should drop off Overnight. Any clouds that hang around during the day will dissipate This Evening. We will have the three ingredients needed for some good radiational cooling...light winds, clear skies and dry air. The dew points are dropping into the low 30s. So, there could be some frost by early Monday Morning away from the City and the Bay. Temps might drop below freezing for the first time in the mountains! Quiet weather is expected for the start of the work week.  ¶ 7:53 AM