San Francisco Bay Area Forecast 1 to 2 days (06/04/23/-06/05/23)– Mostly clear today except for low clouds near the coast this morning. Increasing clouds tonight becoming mostly cloudy on Monday. High temperatures in the upper 50’s to 60’s near the coast into the low 80’s inland on today then into the mid 70’s inland on Monday. Low temperatures in the low to mid 50’s Light winds increasing to westerly 10 to 20 knots in the afternoons.

Extended Forecast for 3 to 7 days Central California (Including Napa Valley and Central Valley then south along the Big Sur Coastline and into the Sierras)- (06/05/23 -06/10/23)– Variable clouds Monday night and Tuesday with a chance of showers or thundershowers at times over the mountains and a chance of showers and a slight chance of thundershowers elsewhere Monday night into Tuesday. Mostly cloudy near the coast and partly cloudy inland Tuesday night through Friday night with a chance of showers and thundershowers over the mountains. Partly cloudy near the coast and mostly clear inland on Saturday except for mostly cloudy over the mountains with a chance of showers and thundershowers. High temperatures in the low 60’s to low 70’s near the coast into the low 80’s through the far inland valleys. Low temperatures mostly in the low 50’s to mid 60’s.

Long Range Weather Outlook Northern and Central California 8 to 15 days – (06/11/23-06/18/23). Partly cloudy with a chance of showers or thundershowers at times over the mountains and in the north with low clouds at times near the coast spreading inland nights and mornings with showers decreasing in the mountains late in the period. Temperatures near to slightly below normal for most of the period.

Longer Range Weather Outlook Northern and Central California 16 to 20 days (06/19/23 – 06/23/23– Mostly fair weather except for patchy low clouds along the coast and a slight chance of showers or thundershowers in the north and over the mountains at times. Temperatures will average near normal.

Northern and Central California 1 to 7 day forecast – Skies are mostly cloudy near the coast this morning as weak high pressure holds over the state temporarily today bringing a little warmer temperatures inland and a decrease in the marine layer but as winds aloft turn south to southeasterly, showers and thundershowers will be active over the mountains this afternoon. High temperatures should reach into the 80’s coastal valleys and into the 90’s through the interior valleys today. An upper level low pressure area will be moving into Southern California from the eastern Pacific by tonight into next week and the counter clockwise circulation around the low into Central California will spread moisture and unstable weather into the mountains for much of next week and also into coastal areas by Monday night and Tuesday with showers and a thundershower likely over the mountains and a chance of showers and a slight chance of a thundershower into coastal areas into Tuesday. Precipitation amounts will be quite variable with mostly less than a tenth of an inch in coastal and interior vallesy except higher amounts in the mountains and areas where thundershowers develop. The coastal showers should end by Tuesday night but continue at times in the mountains for much of next week as another trough develops next weekend continuing the wet weather over the mountains and maintaining cooler weather over coastal and interior valleys of California.

Northern and Central California 8 to 15 day extended forecast –  Recent computer models are showing upper level low pressures near the California coast with an increase in low clouds at times near the coast and a chance of showers and thundershowers over the mountain areas at times especially in Northern California for much of the period as south to southeasterly flow develops ahead of the troughs moving into Calfornia. Temperatures will average near to slightly below normal during the period. Winds aloft are expected to shift to a more west to northwesterly flow into California later in the period that should decrease mountain showers later in the period but continue the marine layer near the coast.

Northern and Central California 16 to 20 day extended Forecast – The most recent long range computer models this morning shows a low pressure trough over the Pacific Northwest and weak low pressure off the California coast that would bring southwesterly winds aloft to the state during the period. This pattern would produce low clouds near the coast and a slight chance of showers or thundershowers over the mountains. Fluctations in this forecast should be anticipated as the models continue to make adjustments in the long range projections. Temperatures should average near normal during the period.