, Issued at 358 PM PDT Thu Sep 24 2026 (This evening through Friday night)
The lack of marine layer development last night (aka our natural air conditioning) allowed temperatures to reach well into the mid 80s to 90s across the interior mountains and valleys of the North/East/South Bay and Bay shoreline, with temperatures closer to the mid 90s across the interior Central Coast. The Pacific coastline remains under the marine influence, therefore temperatures were observed in the mid 60s to 70s.
Overnight, the anticipated cold front pushes through our forecast area. This will bring some relief Friday morning with a thick post- frontal stratus deck and a prominent onshore push of cool, albeit dry, air. Despite the frontal passage, dry air aloft will mix out the majority of low clouds allowing high clouds to dominate the skies through the afternoon into the evening. Because the main core of the 500 mb trough remains far north of our area, no significant impacts are expected with this system. The main impact associated with the post-frontal environment are strong gusts around 20 to 25 mph along the coast into the SF Peninsula.
..issued at 358 PM PDT Thu Sep 24 2026 (Saturday through next Wednesday)
This weekend, the troughing pattern persists, thereby allowing for cold air advection to gradually fill into the region. There is potential for the 500 mb trough to dig more southward over the Bay Area and Central Coast Sunday into Monday, eventually becoming a cut- off low southeast of our forecast area. In response, building high pressure behind the trough may induce a push of weak offshore flow across the higher terrain in the North and East Bay, initiating another warming period early next week.
(06z TAFS) Issued at 850 PM PDT Thu Sep 24 2026
VFR is expected to prevail through the forecast period for a majority of the terminals. Higher confidence in Monterey Bay sites developing MVFR/IFR ceilings late in the overnight hours to near sunrise, with lower confidence for the North Bay and Bay Area sites around the same time.
Vicinity of SFO, VFR with gusty onshore winds persisting through a majority of the forecast period. A slight chance of MVFR ceilings developing around sunrise with low confidence in the extent and timing due to a relatively weak marine layer that mostly confined to the coast.
SFO Bridge Approach, Similar to SFO.
Monterey Bay Terminals, VFR with higher confidence in MVFR/IFR ceilings developing late in the overnight hours to near sunrise Friday morning, with VFR expected by mid-morning due to the weak and compressed marine layer.
(tonight through next Wednesday) Issued at 850 PM PDT Thu Sep 24 2026
Expect fresh to strong northerly breezes to continue through the weekend behind a cold front that pushes through overnight. Near gale force winds are possible across Monterey Bay south to Big Sur Sunday afternoon and evening. Tropical storm activity producing long period southerly swell begins to increase for the beginning of next week.
Ca, None. PZ, Small Craft Advisory until 5 AM PDT early this morning for Pigeon Pt to Pt Pinos 10-60 NM-Pt Arena to Pt Reyes 0-10 nm.
Small Craft Advisory until 3 AM PDT Thursday for Pt Arena to Pt Reyes 10-60 NM.
CA, None. PZ, Small Craft Advisory from 9 AM to 9 PM PDT Friday for Mry Bay.
Small Craft Advisory from 9 AM Friday to 9 AM PDT Saturday for Pigeon Pt to Pt Pinos 0-10 nm-Pt Arena to Pt Reyes 0-10 nm- Pt Reyes to Pigeon Pt 0-10 nm.
Small Craft Advisory until 3 PM PDT Saturday for Pt Pinos to Pt Piedras Blancas 0-10 nm.
Small Craft Advisory from 9 AM Friday to 3 PM PDT Sunday for Pt Arena to Pt Reyes 10-60 NM.
Small Craft Advisory from 9 AM Friday to 3 PM PDT Saturday for Pigeon Pt to Pt Pinos 10-60 NM.
