The National Weather Service's San Francisco office is issuing early warnings of a significant weather shift as we approach midweek. The forecast indicates a developing deep trough in the northeastern Pacific, which is projected to bring wet conditions starting Wednesday. San Franciscans can expect the rainfall to intensify late Wednesday and Thursday, with a possibility of thunderstorms in the mix. In the valleys, rainfall could range from 0.5 to 1.5 inches, while the coastal ranges might see anywhere from 1.5 to 3 inches, although "there is still time for the forecast to change," according to the NWS announcement.
With a reasonable chance of an atmospheric river impacting the state, NWS recommendations suggest completing any outdoor preparations before the rains begin. On top of rain, "southerly winds will also increase as the storm approaches," potentially hitting widespread gusts of 30 to 40 mph, especially through favored gaps and passes, according to the Area Forecast Discussion from the National Weather Service. Commuters should be prepared for wet roadways and the potential for elevated levels on creeks, streams, as well as nuisance flooding.
Until then, the City by the Bay will remain warm and dry through Tuesday, with Tuesday being the final day to make preparations against the expected storms. Veteran's Day will see high temperatures begin to dip slightly. Looking ahead, the incoming weather system is set to drastically drop temperatures on Wednesday, settling at cooler readings between the mid-50s and lower 60s for the lower elevations by the end of the week.
The area's mariners are also advised of changing conditions, as increasing southerly winds paired with a building northwest swell will "generate rough seas across the waters." By Friday, even though winds are expected to lessen, seas could swell up to 15 feet "before diminishing through the weekend," according to the NWS San Francisco. Meanwhile, inland, the detailed forecast anticipates rain mostly after 4 pm on Wednesday, with an 80% chance of precipitation that could lead to new rainfall amounts of less than a tenth of an inch.
_(05).jpg){kind=link}