A couple of storm systems will impact travel conditions through the first half of this weekend. Heavy snow from the mountains of the West will move into the upper Midwest and upper Great Lakes through tonight. Record warmth and Gulf moisture along and east of the Mississippi River will fuel severe thunderstorms, heavy rainfall, fog for the Tennessee Valley and deep South on Friday into Saturday. Read More >
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040 FXUS66 KMTR 082158 AFDMTR Area Forecast Discussion National Weather Service San Francisco CA 158 PM PST Thu Jan 8 2026 ...New SHORT TERM, LONG TERM... .KEY MESSAGES... Updated at 110 PM PST Thu Jan 8 2026 - High pressure building over the interior promoting cooler temperatures through this weekend - Hazardous beach conditions along Pacific Coast beaches through Friday and again early next week && .SHORT TERM... Issued at 110 PM PST Thu Jan 8 2026 (This evening through Friday) The radar has been placed back into "Clear Air Mode" and will likely remain this way for at least the next week, maybe even two. In the near term, high surface pressure building over the interior Western US in the wake of a cold front will promote light offshore flow across our region. This is similar to what we`d call an inside slider, but without the larger fire weather risks. This time, it`s cold weather that is the main risk contributor. By this evening, we`ll start to see winds veer to more of an E/NE direction. This will not only promote drying of the airmass, but also clearing of any lingering cloud cover going into tonight. In addition to long winter nights, this primes the situation for maximum nighttime radiational cooling. Forecast temperatures haven`t really changed much from the previous issuances. Main difference today is that we`ve issued a Cold Weather Advisory for the interior East Bay, North Bay Valleys, South Bay, Santa Cruz Mtns, and the Monterey Bay region where temperatures will be in the mid-30s by sunrise Friday. Additionally, we`ve issued an Extreme Cold Warning for regions of the interior Central Coast including the southern Salinas Valley where temps will be in the mid-to-upper 20s by morning. && .LONG TERM... Issued at 110 PM PST Thu Jan 8 2026 (Friday night through next Wednesday) The aforementioned pattern persists into the weekend, warming slightly by Sunday morning. By Monday and Tuesday mornings, temps will be back into normal territory. Otherwise we have high confidence in dry weather persisting through the forecast period as a broad ridge of high pressure builds aloft. && .AVIATION... (18Z TAFS) Issued at 944 AM PST Thu Jan 8 2026 VFR expected through the TAF period with a slight chance of reduced VIS at KSTS during the pre-dawn hours Friday. Otherwise a light offshore wind pattern keeps things very tame across the region with mostly clear skies and light to moderate E/NE winds. Vicinity of SFO...VFR. Light offshore wind setup will keep things quiet in terms of cloud cover. Most impactful thing for SFO will be the wind direction overnight tonight and Friday morning. Not anticipating winds above 08-10 kts at the moment, but direction will most likely be NE. SFO Bridge Approach...Similar to SFO. Monterey Bay Terminals...VFR. High confidence in mostly clear skies with some high clouds entering the region by Friday morning. Generally light offshore flow, especially during the overnight hours when cold air drains out of the Salinas Valley. && .MARINE... (Today through Tuesday) Issued at 944 AM PST Thu Jan 8 2026 Moderate to breezy winds are affecting the outer waters. A building northwesterly swell is arriving and is causing a rough sea state with shoaling near the coast, harbor entrances, and bars. Winds and seas will ease Friday into the weekend. && .BEACHES... Issued at 350 AM PST Thu Jan 8 2026 High Surf Advisory 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 Friday for CAZ006-505-509-530. Cold Weather Advisory from 1 AM to 9 AM PST Friday for CAZ502- 506-510-512-513-515-528>530. Extreme Cold Warning from 1 AM to 9 AM PST Friday for CAZ514- 516>518. Beach Hazards Statement through Friday evening for CAZ529. PZ...Small Craft Advisory until 9 PM PST this evening for Mry Bay. Small Craft Advisory until 3 AM PST Friday 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 Friday for Pigeon Pt to Pt Pinos 10-60 NM-Pt Arena to Pt Reyes 10-60 NM. && $$ SHORT TERM...Behringer LONG TERM....Behringer AVIATION...Behringer MARINE...Murdock 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 |
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