FXUS66 KMTR 091122 AFDMTR Area Forecast Discussion National Weather Service San Francisco CA 322 AM PST Fri Jan 9 2026 ...New AVIATION, MARINE, BEACHES... .KEY MESSAGES... Updated at 119 AM PST Fri Jan 9 2026 - High and dry pattern with offshore flow and cold overnight conditions - Hazardous beach conditions at all Pacific Coast beaches today and Sunday through Thursday && .SHORT TERM... Issued at 119 AM PST Fri Jan 9 2026 (Today and tonight) High pressure building into the Great Basin and a coastal trough developing off of California is creating offshore flow. Hyper- localized gusts of 40-50mph have been observed on Fremont Peak, Mt. St. Helena, and Mt. Umunhum. As there are no fire weather concerns and the winds aren't mixing down, this is more of a notable thing rather than an impactful thing. Some high clouds associated with a developing storm force low in the Eastern Pacific Ocean are streaming in from the north. The clouds look thin enough on satellite imagery that they shouldn't be able to impact the minimum temperature forecast too much. As such, cold weather products remain in effect until 9AM this morning. Have decided to hold off on any issuance of cold weather products for Friday night, the reason is two-fold. It looks like some zones will be able to be omitted or changed tonight. The Monterey Bay zones may need to be removed and the Eastern Santa Clara Hills may need to change from an Extreme Cold Warning to a Cold Weather Advisory. So to limit confusion, we will take it one night at a time for now. This also gives us the advantage of seeing what transpires this morning as this morning and tomorrow morning are expected to be very similar. && .LONG TERM... Issued at 119 AM PST Fri Jan 9 2026 (Saturday through Thursday) High pressure building into the Great Basin and a coastal trough developing off of California is creating offshore flow. Hyper- localized gusts of 40-50mph have been observed on Fremont Peak, Mt. St. Helena, and Mt. Umunhum. As there are no fire weather concerns and the winds aren't mixing down, this is more of a notable thing rather than an impactful thing. Some high clouds associated with a developing storm force low in the Eastern Pacific Ocean are streaming in from the north. The clouds look thin enough on satellite imagery that they shouldn't be able to impact the minimum temperature forecast too much. As such, cold weather products remain in effect until 9AM this morning. Have decided to hold off on any issuance of cold weather products for Friday night, the reason is two-fold. It looks like some zones will be able to be omitted or changed tonight. The Monterey Bay zones may need to be removed and the Eastern Santa Clara Hills may need to change from an Extreme Cold Warning to a Cold Weather Advisory. So to limit confusion, we will take it one night at a time for now. This also gives us the advantage of seeing what transpires this morning as this morning and tomorrow morning are expected to be very similar. && .AVIATION... (12Z TAFS) Issued at 318 AM PST Fri Jan 9 2026 VFR through the period with offshore flow. Marginal conditions for LLWS for STS/APC. Mid-high level clouds. Vicinity of SFO...VFR with offshore flow. SFO Bridge Approach...Similar to SFO Monterey Bay Terminals...VFR && .MARINE... (Today through Wednesday) Issued at 318 AM PST Fri Jan 9 2026 Gentle to moderate breezes persist over the coastal waters today. A moderate period and larger northwesterly swell will continue produce a rough sea state with shoaling near the coast, harbor entrances, and bars. Seas will ease late Friday and into the weekend. Dry weather will continue with a high pressure system over the coastal waters and bays. && .BEACHES... Issued at 321 AM PST Fri Jan 9 2026 Overall beach/surf zone still remain hazardous due to moderate period and higher swell. The largest surf/breaking waves will be this morning before easing through the day. High Surf Advisory still remains in effect through 10 pm Friday PST. Expect large breaking waves up to 22 feet, strong rip currents and sneaker waves from coastal Sonoma county to coastal Monterey county, excluding the northern Monterey Bay shoreline where a Beach Hazards Statement will be in effect. Large breaking waves can overpower swimmers resulting in significant physical injury and increase the risk of drowning. Beach Hazards Statement remains in effect through Friday evening for the northern Monterey Bay shoreline. Expect hazardous beach conditions with strong rip currents, sneaker waves, and breaking waves up to 15 feet. This will result in dangerous conditions along the shoreline. Stay off of jetties, piers, rocks, and other waterside infrastructure. Remain out of the water to avoid hazardous surf and NEVER turn your back on the ocean. Monitor local weather, surf and tide forecasts at www.weather.gov/mtr. && .MTR WATCHES/WARNINGS/ADVISORIES... CA...High Surf Advisory until 10 PM PST this evening for CAZ006-505- 509-530. Cold Weather Advisory until 9 AM PST this morning for CAZ502-506- 510-512-513-515-528>530. Extreme Cold Warning until 9 AM PST this morning for CAZ514- 516>518. Beach Hazards Statement through this evening for CAZ529. PZ...Small Craft Advisory until 9 AM PST this morning for Pigeon Pt to Pt Pinos 0-10 nm-Pt Arena to Pt Reyes 0-10 nm-Pt Pinos to Pt Piedras Blancas 0-10 nm-Pt Reyes to Pigeon Pt 0-10 nm. Small Craft Advisory until 3 PM PST this afternoon for Pigeon Pt to Pt Pinos 10-60 NM-Pt Arena to Pt Reyes 10-60 NM. && $$ SHORT TERM...Sarment LONG TERM....Sarment AVIATION...MM MARINE...MM Visit us at www.weather.gov/sanfrancisco Follow us on Facebook, X, and YouTube at: www.facebook.com/nwsbayarea x.com/nwsbayarea www.youtube.com/nwsbayarea