, Issued at 1240 PM PDT Sat Aug 29 2026 (This evening through Sunday night)
Mostly sunny sky conditions have return to the region this afternoon. This will lead to warmer conditions today over the North Bay with the lack of mid/upper level high clouds. However, temperatures across the region with be a few to several degrees below normal as an mid/upper level low pressure system moves into the Pacific Northwest and British Columbia.
The marine layer is forecast to deepen through the weekend. However, with clearing skies off of the North Bay coast this afternoon, less confidence for a return of stratus/fog overnight and into Sunday morning. Still anticipate at least a patchwork of stratus/fog to develop late this evening and moreso into Sunday morning along the coast and into the adjacent valleys. For Sunday, expecting more of the same as troughing persist along the West Coast.
..issued at 1240 PM PDT Sat Aug 29 2026 (Monday through next Friday)
A reinforcing trough develops and begins to deepen off of the Pacific Northwest coast through the middle of the upcoming week. As a result, afternoon temperatures will be some 5 to 15 degrees below normal for this time of year. This will system will likely bring rainfall to the Pacific Northwest. By late week, the NBM is suggesting a better chance of rain/rain showers as the trough off of the West Coast continues to deepen and potential drags a weak frontal boundary across the region. There is still low to moderate confidence of this occuring.
(18z TAFS) Issued at 1151 AM PDT Sat Aug 29 2026
VFR prevails this afternoon as moderate onshore winds increase with a few sites experiencing strong gusts around 20 kt in the late afternoon. Onshore winds become gentle through the evening into the overnight hours. The OAK 12Z sounding from this morning measured the marine layer at a depth of ~1400 ft. An upper level low situated over our area is expected to deepen the marine layer further. A mix of IFR to low-end MVFR ceilings return tonight across the terminals with medium confidence on arrival times and ceiling heights.
Vicinity of SFO, Northwest to westerly moderate winds prevail into the evening with frequent strong gusts around 20 to 25 kt at SFO. OAK may experience occasional 20 kt gusts during the afternoon. Winds ease after sunset into the overnight hours. Relied on persistence from last night on stratus arrival with medium confidence for MVFR ceilings. Some model guidance hinted at the possibility for IFR ceilings similar to last night, but given the expected deepening of the marine layer, the TAF advertises low-end MVFR.
SFO Bridge Approach, Occasional strong gusts through the afternoon. Cloud cover may be patchy overnight, depending on how well organized the marine layer becomes. Otherwise, similar to SFO.
Monterey Bay Terminals, VFR through the afternoon with an early arrival of IFR ceilings around sunset for MRY and after sunset for SNS. Moderate onshore winds prevail through the day and diminish to gentle overnight.
(today through Thursday) Issued at 914 AM PDT Sat Aug 29 2026
Northwest winds remain fresh with strong to near gale force gusts today into Sunday night. In response, wind driven seas build to rough this afternoon and steadily subside to moderate through next week. A long period southerly swell also peaks today around 17 to 18 seconds and gradually diminishes by Sunday night.
Ca, None. PZ, Small Craft Advisory until 3 AM PDT Sunday for Mry Bay-Pigeon Pt to Pt Pinos 0-10 nm.
Small Craft Advisory until 3 AM PDT Monday for Pt Arena to Pt Reyes 0-10 nm-Pt Arena to Pt Reyes 10-60 NM.
Small Craft Advisory until 9 PM PDT Sunday for Pigeon Pt to Pt Pinos 10-60 NM-Pt Pinos to Pt Piedras Blancas 0-10 nm.
