The Bay Area is experiencing a temporary cool-down ushering in the first whisper of fall as an upper-level trough off the West Coast nudges temperatures down. "Widespread cloud cover with bases at between 300-1,300 feet continue to spread inland," the National Weather Service San Francisco Bay Area reported this morning, predicting that inland temperatures would drop by 10-20 degrees compared to yesterday, with a lesser but still noticeable cooldown of 1-10 degrees near the coast.
The NWS also forecasts a "gradual warming trend into Friday as high pressure builds over the Desert Southwest." Even as the Bay Area welcomes the cooler respite, they expect a swift return to above-average temperatures by the end of the week, according to the NWS Bay Area. Breezy onshore winds are anticipated to buffet the region this afternoon and into the evening before becoming light and variable overnight.
Cooler temperatures this afternoon (Wednesday), but it will be short lived as temperatures return to above seasonal averages by Friday. The cool-down is in response to an upper level trough off of the West Coast. #CAwx #BayAreaWX pic.twitter.com/3UcQuKT4hL
— NWS Bay Area 🌉 (@NWSBayArea) September 25, 2024
Heading into the weekend, while we can anticipate more comfortable, near-season temperatures, the marine layer's deepening curtain could bring about mist or drizzle in certain locales. The National Weather Service notes a potential, though uncertain, set up for "light offshore flow," which could have implications for fire weather conditions despite the recent cooling. While enjoying the ebb of this week's heat, Bay Area residents should remain duly aware of the shifting tides of our regional climate.
At the bay's edge and across the maritime expanses, mariners are advised of "light to gentle northwesterly breezes," per the National Weather Service forecast, with conditions slated to become more rigorous, fomenting moderate to fresh winds by Thursday that will rear up the seas in the outer waters. For those with skin in the maritime game or those simply enjoying the briny embrace of our Pacific coastline, heed the winds of change as they dance across these Northern California waters. Stay abreast of the marine conditions as they evolve from placid to potentially perilous with the crests of the approaching tides.
