San Francisco Bay Area Weather Forecast (Including Santa Cruz County) – (1 to 3 days) – Mostly clear today through Wednesday except for low clouds and patchy fog moving inland nights and mornings.   Westerly winds 10 to 20 knots in with stronger gusts near the coast in the afternoons and evenings.  High temperatures in the high 50’s to low 60’s near the coast and into the  high 80’s inland today and into the low 90’s on Wednesday. Low temperature mostly in the low 50’s to low 60’s.  

Extended Forecast for Central California (Including Napa County south to Monterey County and east into the Sierras –  (3 to 7 days – (07/27/17 -08/01/17) –  Mostly clear Wednesday night through Monday, except for patchy night and morning low clouds near the coast spreading locally into coastal valleys at times through Friday decreasing over the weekend.  There will be an increase in clouds over the mountains on Monday. High temperatures mostly in the high 50’s to low 60’s to the high 70’s near the coast warming into mid 80’s to mid 90’s inland cooling somewhat near the coast early next week.  Low temperatures mostly in the 50’s to mid 60’s.

Extremely Long Range Weather Outlook Northern and Central California 8 to 15 days (08/02/17 – 08/09/17) – Mostly fair and hot with patchy late night and morning low clouds near the coast at times. A chance of showers and thundershowers over the mountains at times during the period.  Above normal temperatures

Extremely Long Range Weather Outlook Northern and Central California 16 to 20 days (08/10/07 – 08/14/17) – Mostly fair during the period except for night and morning low clouds and patchy fog near the coast at times. A slight chance of afternoon and evening thundershowers over the mountains at times. Slightly above  normal temperatures

Short Term Weather 1 to 7 day Forecast Discussion – Weak upper level low pressure near the coast of California will bring cooler weather near the coast today but warm to hot temperatures inland as well as scattered afternoon and evening thundershowers to Northern California mountains. Low clouds will form along the coast during the night and spread locally into coastal valleys at times during the morning hours and there wil be some instability in the north as the trough moves through with a slight chance of showers and thundershowers over the northern mountains through Wednesday. There will be only slight fluctuations in the inland valley temperatures through week,

Northern and Central California 8 to 15 day extended forecast–  Little change in the weather pattern is expected at the beginning of the period with southerly winds aloft bringing  occasional night and morning low clouds near the coast and sea breezes keeping temperatures near normal near the coast with warm to hot temperatures through the inland valleys. There will be a chance of afternoon convection over the mountains at times.  The high pressure is expected to weaken late in the period as a strong trough approaches Northern California and picke up an upper level system off the Southern California  This will bring a better chance of showers over the mountains and cooler weather.  

Northern and Central California 16 to 20 day extended forecast–  Higher pressureare expected to rebuild over southwestern United States asan upper low moves east out of California later in the period with warmer temperatures inland and somewhat onshore winds near the coast with only a slight chance of showers or thundershowers over the mountains at times.