
Bundling up should be the priority for residents in the North Bay and East Bay Interior Valleys, where the National Weather Service (NWS) San Francisco has issued a Frost Advisory from 11 PM tonight to 9 AM tomorrow, with chilling forecasts predicting temperatures to hover between 32-35 degrees. Most of San Benito, Southeast Monterey County, and the Southern Salinas Valley are also caught in this cold snap, prompting concerns about hazardous conditions for vulnerable populations, including the unsheltered and those without adequate heating, according to the National Weather Service.
Yet, there's an impending shift on the horizon as the area braces for a change in weather patterns, bringing a colder airmass and upping precipitation odds for the Central Coast come the weekend, according to the NWS San Francisco. After a notably nippy start to the day, the South Bay and Central Coast are expected to bask in the low to mid-70s amidst clear skies and slack winds. Though the North Bay and Bay Area will enjoy a similarly sunny afternoon, their temperatures should align more closely with yesterday's. Today's afternoon promises to warmly wrap the region under the benevolence of an amplified ridge.
As we trek towards Friday, however, forecasts unveil the initial onset of a colder front moving through, with the NWS San Francisco noting, "A pattern change will be in full swing across our region by sunrise Friday morning." The North Bay and Bay areas are likely to experience milder highs in the low to mid-60s, and even when the thermometer climbs, it'd barely touch the upper 60s to low 70s over the Central Coast ahead of the front. A second, stronger cold front is slated for Saturday morning, possibly parking temperatures below 60 across the board. At the same time, gusty winds and the potential of snow in select highland areas hang in the balance.
For travelers and weekend commuters, the skies over the San Francisco Bay are forecasted to remain clear, with NWS San Francisco's aviation advisory predicting "High confidence in VFR through the TAF period." Yet, mariners should heed caution; the marine forecast warns of widespread strong northerly winds hazardous to small craft starting Friday, hinting at rough seas and the potential need for a Gale Warning in certain off-coast areas as northerly winds ramble on unabated until Sunday night when Monday promises less chaotic seas before the weather gradually shifts into another pleasant pattern later next week.