As Bay Area residents bask in a balmy Halloween weekend, the National Weather Service (NWS) San Francisco anticipates a significant shift in the weather next week, with a potential storm bringing the season's most substantial rainfall to the region. According to an update from the NWS, a developing deep trough in the northeastern Pacific could disrupt the pleasant conditions we are currently enjoying. However, specifics about timing and intensity remain uncertain at this point.
In the short term, the weather continues to cooperate, with temperatures hovering above normal, thanks to a longwave ridge pattern. But beyond this weekend, changes are afoot. The "storm to watch" is anticipated to make its presence felt mid-week, primarily impacting the North Bay initially. "Confidence is increasing for impactful rainfall in the North Bay on Wednesday,” reports the NWS San Francisco's Area Forecast Discussion. The NWS projects rainfall totals for the North Bay to range from 0.75"to -1.75" over 24 hours, a welcome sight for an area yearning for moisture.
Meanwhile, a Beach Hazards Statement has been issued for Pacific Coast beaches across the Bay Area, effective from Saturday morning through late Monday night. Hazardous conditions such as sneaker waves and strong rip currents are expected, with the NWS San Francisco advising beachgoers to "remain out of the water, stay off of waterside infrastructure, and never turn your back on the ocean!" This caution extends to local mariners as well; the NWS San Francisco forecasts "fresh to strong northerly breezes" and "moderate to rough seas" through the weekend, leading into next week's unsettled weather.
Regarding aviation, variably cloudy conditions might give way to clearer skies. "Upper-level longwave ridging and northerly/offshore flow will yield warmer and drier conditions over the next TAF period," according to the NWS forecast. Pilots should expect fluctuating conditions until the marine layer stabilizes. Locally, weather-related disruptions to flights are minimal at this juncture, but stakeholders will be closely monitoring the situation as it unfolds over the Pacific.
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