, Issued at 1257 AM PDT Sun May 24 2026 (Today through Monday)
Surface troughing will continue through Memorial Day Weekend. This will keep the marine layer deep around 2,000 feet with early returns and late clearings. Sensible weather wise, temperatures will remain near to slightly below normal with onshore flow. Gusts of 25-35 mph are expected along the coast, across ridgelines, and through west- east oriented gaps and passes.
..issued at 1257 AM PDT Sun May 24 2026 (Tuesday through Saturday)
Global ensemble clusters are in agreement of upper-level troughing arriving Tuesday, marking the coolest day of the week. Strong northerly winds will develop, bringing gusts of 30-40 mph to the coast, across ridgelines, and through gaps and passes with widespread hazardous conditions for small craft across the waters. As the trough digs, it is expected to become a cutoff low. While there is uncertainty in the exact location, strength, and timing, it is looking likely that an inside slider like pattern will develop Wednesday into Thursday. While inside slider is usually synonymous with elevated fire weather conditions, good to excellent overnight relative humidity recovery will help mitigate these concerns for now. This pattern will support northerly (drying) winds, kicking off a gradual warming and drying trend. The aforementioned cut off low will fill and become an open wave by Friday, leaving zonal flow with onshore flow in its wake.
(12z TAFS) Issued at 500 AM PDT Sun May 24 2026
The marine layer is well established, leaving the majority of the sites with MVFR cigs this morning. Expect these conditions to continue through the morning, with perhaps a few pockets of IFR cigs being possible. Stratus burns off by mid to late morning, with VFR conditions returning to most interior locations. Stratus should along the coast to some extent which could leave sites like KHAF with MVFR cigs all day. Given no real pattern change today, look for the marine layer to return and bring another night of MVFR cigs.
Vicinity of SFO, Stratus has yet to fill in at KFSO, but satellite shows it slowly advancing to the terminal. Expect MVFR cigs to fill in, which will then last through mid to late morning. VFR conditions will then prevail through at least the evening hours. Given the pattern looks to stay the same, MVFR cigs should return to SFO early Monday morning. Pushed the timing back some given what has occurred the last two days, with skies clearing by 17Z. Medium to high confidence in the forecast.
SFO Bridge Approach, Similar to SFO.
Monterey Bay Terminals, MVFR cigs plague the terminals around Monterey Bay, as the marine layer holds at about 2000ft this morning. Conditions should clear out by mid to late morning, which should give us a period of VFR conditions for a few hours this afternoon. MVFR cigs return early this evening and then hold into Monday morning.
(today through Friday) Issued at 500 AM PDT Sun May 24 2026
Light breezes and diminished seas will persist through through Tuesday. Strong northwesterly winds from a developing system set to arrive on Tuesday will result in building rough seas for the second half of next week.
Ca, None. PZ, None.
