Bay Area residents can look forward to a warming trend as we head into the weekend, with temperatures expected to climb 5 to 15 degrees above the seasonal average. Interior locations are anticipated to reach into the 90s, a stark contrast to the showers and thunderstorms that characterized our weather just a day prior. However, the NWS forecasts suggest that a significant cool-down will follow, with temperatures expected to drop below normal by Sunday.
As Monday approaches, a drastic shift looms with the arrival of an "anomalously deep upper low." The NWS San Francisco advises that a weather pattern conducive to rain and thunderstorms will occur right after the dry weekend, lasting from Monday through Wednesday. The forecast indicates a "Pineapple Express" scenario, with atmospheric rivers potentially extending all the way to Hawaii and bringing in moisture levels between 1 and 1.5 inches. This is bound to have the most significant impact in the North Bay area, gradually losing intensity as it moves south toward the Central Coast.
Aviators and mariners should note that, while clearer skies prevail along the coast, the interior may contend with stratus lasting into the morning hours. The marine layer, while compressed, could bring about low clouds and possibly fog along the coast by tonight. Those navigating the Monterey Bay may experience variable conditions due to the interplay between the marine layer and incoming drier air.
Winds and seas are anticipated to subside by late Saturday, offering a respite to those at sea, though this will be short-lived. "Unsettled weather returns early next week," cautions the NWS San Francisco office. The expected conditions include showers, potential thunderstorms, and building seas that may affect coastal regions. Those conducting activities on the water during this time should stay updated with the latest marine forecasts and take suitable precautions.
