Bay Area residents can expect a significant weather shift next week, with the National Weather Service in San Francisco forecasting widespread rainfall and potential thunderstorms. NWS San Francisco advises locals to use this weekend for preparations, such as clearing out gutters and securing outdoor Halloween decorations ahead of the coming wind and rain.
According to an Area Forecast Discussion by the National Weather Service, San Francisco, CA, weather conditions will remain below seasonal normal temperatures with stronger onshore winds predicted than the typical sea breeze circulation. The NWS discussion states, "The region will remain under the influence of the upper-level longwave trough through the weekend." Residents are urged to prepare for colder weather and increased northwesterly winds that may blow loose items away.
As Monday approaches, an upper-level low from the Washington/Canada border is set to push down the coast, potentially delivering over an inch of rain to many areas between Monday and Wednesday. The NWS alerts drivers to increased risks on the road, advising caution due to oil separation, which could lead to an uptick in car accidents. Given the upcoming first widespread wetting rainfall (0.10 inch or greater) of the wet season, the service stresses the importance of patience and safety during travel.
The forthcoming system, however, is not exceptional by historical measures. "It is not an atmospheric river, and it is not from typhoon remnants," clarifies the forecast discussion from the NWS San Francisco. This distinction is crucial for maintaining perspective on the storm's intensity, avoiding heightened concerns over regular seasonal occurrences. Nevertheless, the expected rainfall could benefit water storage and mitigate fire weather concerns, marking a critical point in the seasonal transition. San Francisco International Airport, for instance, is poised to receive about 1.36 inches of rain, surpassing the October average but well below historical maximums.
