San Francisco (MTR) — the National Weather Service forecast in plain English · Plaincast

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Near normal temperatures this weekend, cooling to slightly below normal through the remainder of the upcoming week

Coastal flooding due to astronomical high tides and thermal expansion this weekend through Thursday

Update

Offshore winds are diminishing across the Mayacamas and Vaca mountain ranges with Mount Saint Helena gusting to 40 mph currently (peaked at 63 mph at 1:10 AM PDT). Aside from some patchy fog in the southern portion of the Salinas Valley, skies are clear across much of the region. No updates anticipated this morning as the ongoing forecast remains on track.

Short Term

Gusty offshore flow across the North Bay Interior Mountains is ongoing tonight, with the windy and dry conditions dropping MinRH values in the 20s for some locations. Fire weather concerns would be higher for this area had we not received the recent wetting rainfall. The offshore flow regime should mostly limit fog development early this morning but still can't be ruled out entirely in some of the river valleys in Sonoma County.

Temperatures today will be around 5 degrees warmer than Friday and near normal for this time of year. The gusty winds across the North Bay will begin to ease by late this morning, with a beautiful day in store area wide across our forecast area as upper level ridging builds overhead.

Long Term

Sunday will almost be a carbon copy of today for the North Bay and Bay Area, with the Central Coast seeing temperatures warm another few degrees. Confidence and consensus in the synoptic pattern is poor after Monday. An upper trough shifts south to our latitude on Monday bringing a return of onshore flow, however the overall progressive pattern is struggling with the depth of the trough and how another system well offshore interacts with the flattening trough as it moves into the Great Basin. Despite the uncertainty in the overall pattern, any troughing or ridging will continue to be progressive and low amplitude, with no large temperature fluctuations or precipitation chances until the end of next week when the the blend-of-models forecast seems to pick up on what the current the European model deterministic has depicted for next Friday into the weekend, troughing with increasing rain chances.