FXUS66 KMTR 012334 AFDMTR Area Forecast Discussion National Weather Service San Francisco CA 334 PM PST Mon Dec 1 2025 ...New AVIATION, MARINE... .KEY MESSAGES... Updated at 145 PM PST Mon Dec 1 2025 - Less fog and stratus today, even less tomorrow. - Inside slider promotes gusty offshore flow Wednesday morning across North Bay, Bay Area, and Santa Cruz Mtns. Gusts to 45 mph possible in higher terrain. Limited fire weather concern thanks to high fuel moisture. - Quiet and dry after midweek into the weekend. Still looking like the next chance for a meaningful pattern change is around the middle of the month. && .SHORT TERM... Issued at 145 PM PST Mon Dec 1 2025 (This evening through Tuesday) Less cloudiness for most places today thanks to a weak upper level disturbance and a light push of offshore winds overnight. This helped dry the low-to-mid levels and provide enough mixing aloft to aid in a quicker clearing to clear skies today. Some areas still holding on to fog and low clouds in far eastern Contra Costa and Alameda counties bordering the central valley. We can expect this trend to continue into Tuesday with dryer and in place, resulting in temps a couple of degrees warmer than today. && .LONG TERM... Issued at 145 PM PST Mon Dec 1 2025 (Tuesday night through next Sunday) By Tuesday night we'll start to see a deep upper low digging into the Great Basin in what appears as an inside slider. Surface high pressure building in northern NV in the wake of this system promotes a strong offshore oriented pressure gradient that will result in gusty offshore winds. Winds set to increase going into Tuesday night, increasing through early Wednesday morning and peaking sometime by noon Wednesday. We're anticipating NE winds 25-35 mph with potential gusts to 40 mph across the North Bay, East Bay Hill, and Santa Cruz Mtns. Some potential for isolated gusts to 50 mph along the higher ridgetops of the interior North Bay. Things will certainly dry out with this burst of offshore flow, but we aren't expecting RH to get below the 30-40% range for most. Isolated areas at highest elevations in the interior North Bay may see RH as low as 25-30% Wednesday. Despite the gusty and dry conditions, fuel moisture should mitigate most fire weather concerns thanks to productive rainfall in early November. Beyond the middle of the week, things look much quieter and a return to a benign pattern with the ridiculously resilient ridge (RRR) dominating through the weekend. && .AVIATION... (00Z TAFS) Issued at 333 PM PST Mon Dec 1 2025 IFR-MVFR stratus lingers in the interior East bay, especially east of the Diablo Range, through the next few hours fueled by dense stratus across the Central Valley. VFR conditions with thin high clouds, almost like an elevated haze, prevail everywhere else with a generally gentle offshore flow across the region. Winds will diminish overnight, and radiational fog and stratus development is possible in the inland valleys and the interior East Bay. The nature of radiational fog development makes it very hard, almost impossible, to forecast the exact extent, but the highest probability of impact seems to be across the North and East Bay valleys, with some possibilities of development near SFO as well. Stratus will dissipate through Tuesday morning with a gentle onshore flow developing Tuesday afternoon. Vicinity of SFO... Low confidence of MVFR-IFR stratus developing Tuesday morning, covered by a TEMPO group in the current TAF. Gentle southeast flow will continue through the evening hours, with light winds overnight before onshore flow resumes Tuesday afternoon. SFO Bridge Approach... Similar to SFO. Monterey Bay Terminals... VFR through the TAF period. Winds remain relatively light throughout, with generally onshore flow during the day before turning to a drainage flow overnight. && .MARINE... (Tonight through next Saturday) Issued at 333 PM PST Mon Dec 1 2025 Moderate to fresh northerly breezes and moderate to rough seas will prevail through Tuesday morning. Hazardous marine conditions return Tuesday afternoon as northerly breezes increase to become fresh to strong and seas become rough to very rough. Gale fore gusts will be possible across the far northern outer waters on by Tuesday afternoon. Conditions improve Thursday with moderate northerly breezes and moderate seas. && .BEACHES... Issued at 1014 AM PST Mon Dec 1 2025 Hazardous beach conditions will continue into Wednesday evening with a very energetic surf zone. A beach hazards statement remains in effect for the coastline from Sonoma County to Monterey County through 10 PM PST Wednesday evening. Breaking waves 10 to 14 feet, with long lulls of 10 to 20 minutes or more between largest sets can be expected. Some of the favored break points may exceed 20 feet at times. Forerunners will be 18+ seconds with heights of 2-5 feet into tonight resulting in the greatest risk for sneaker waves. This combined with high astronomical tides in the morning hours will increase the aforementioned risk. Sneaker waves can unexpectedly run significantly farther up the beach than normal, including over rocks and jetties. Rip currents are typically more frequent and stronger in the vicinity of jetties, inlets, and piers. RGass && .MTR WATCHES/WARNINGS/ADVISORIES... CA...Beach Hazards Statement through Wednesday evening for CAZ006-505- 509-529-530. Coastal Flood Advisory from 6 AM Tuesday to 3 PM PST Sunday for CAZ006-506-508-529-530. PZ...Small Craft Advisory from 3 PM Tuesday to 3 AM PST Wednesday for Pt Arena to Pt Reyes 0-10 nm. Small Craft Advisory from 9 AM to 3 PM PST Tuesday for Pt Arena to Pt Reyes 10-60 NM. Gale Warning from 3 PM Tuesday to 3 AM PST Wednesday for Pt Arena to Pt Reyes 10-60 NM. Small Craft Advisory from 9 PM Tuesday to 3 AM PST Wednesday for Pigeon Pt to Pt Pinos 10-60 NM. && $$ SHORT TERM...Behringer LONG TERM....Behringer AVIATION...DialH MARINE...RGass 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