Flash flooding threatens areas from the Tennessee Valley to the Carolinas as storms repeat along a stalled front. Monsoonal storms may trigger flooding in the Southwest. Dangerous heat expands across the Desert Southwest, Plains, mid-Mississippi Valley and Southern Tier. Critical fire weather for interior Pacific Northwest. Cooler, drier air brings brief relief to the Great Lakes and Northeast. Read More >
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835 FXUS66 KMTR 241531 AFDMTR Area Forecast Discussion National Weather Service San Francisco CA 831 AM PDT Fri Jul 24 2026 ...New UPDATE, BEACHES... .KEY MESSAGES... Updated at 1200 AM PDT Fri Jul 24 2026 - Breezy onshore winds expected each afternoon and evening through the weekend - Temperatures near seasonal averages throughout early next week - Gradual warming second half of next week && .UPDATE... Issued at 830 AM PDT Fri Jul 24 2026 Once again, the dry air mass above the marine layer was able to mix down and limit the coverage of stratus. This is the result of the deepening mid/upper level through off of the Pacific Northwest Coast. As stratus that has developed retreats to the coast, mostly sunny skies are forecast regionwide this afternoon. Temperatures will warm into the 60s to lower 70s in the west/northwest facing locations near the coast, 70s to lower 80s across the bayshore and Santa Cruz region, 80s to lower 90s across the interior, and mid-to- upper 90s across the warmest spots in the interior Central Coast. Overall, similar weather conditions regionwide as yesterday. RGass && .SHORT TERM... Issued at 1200 AM PDT Fri Jul 24 2026 (Today and tonight) Drier air aloft continues to work on a compressed marine layer overnight into Friday morning. Stratus will push inland overnight with uncertainty in the extent and timing but expecting less coverage than the previous couple of nights, however patchy dense fog is still possible in the valleys, especially the Russian River Valley in the North Bay. Stratus should also be quicker to retreat back to the coastline, by late morning Friday as drier air in the lower boundary layers mixes closer to the surface. Temperatures will remain similar as yesterday and remain so into the weekend. && .LONG TERM... Issued at 1200 AM PDT Fri Jul 24 2026 (Saturday through Thursday) The expansive dome of high pressure centered over the Four Corners region and the persistent troughing pattern over the EPAC has us comfortably in the middle, with steady onshore flow at the surface and temperatures hovering right around normal for this time of year through the weekend into the beginning of next week. There`s no dramatic pattern change indicated in the extended guidance. We will see gradual warming by the middle and end of next week as Fausto drifts northwest and mid/upper level heights rise in response to the troughing getting shifted north. See beaches section for impacts from Fausto along our Pacific coastline for the weekend into next week. && .AVIATION... (12Z TAFS) Issued at 430 AM PDT Fri Jul 24 2026 The marine layer is 1500 feet as measured by the 12Z weather balloon. That`s similar to yesterday, but the stratus coverage is a little more patchy, particularly in the North Bay where some drier air has mixed in. Fog has developed at Santa Rosa and will very likely persist for the next few hours. The marine layer stratus will retreat back to the coast with VFR conditions expected at all terminals with the exception of HAF this afternoon. Vicinity of SFO...IFR ceilings will likely persist through 15Z or so before lifting to MVFR. There is a chance that the skies scatter out before then thanks to dry air to the north and south. The SFO-SAC gradient is +2.4 mb, slightly stronger than this time yesterday. Onshore winds will be strong in the afternoon with gusts as high as 30 kt possible. SFO Bridge Approach...Skies will stay more clear over the approach compared to the terminal this morning. Monterey Bay Terminals...The stratus impacting MRY and SNS is detached from the main stratus deck over the ocean. SNS is managing to dodge ceilings at the moment, but it should go broken IFR at any minute with the walls closing in. MRY will stay IFR until 18Z or so, and there`s a decent chance it drops to LIFR temporarily given recent trends. && .MARINE... (Today through Wednesday) Issued at 430 AM PDT Fri Jul 24 2026 Moderate to fresh northwest breezes with strong gusts will continue through the weekend, with moderate wind driven seas. Long period southerly swell from Hurricane Fausto will arrive tonight and persist into the beginning of next week. && .BEACHES... Issued at 830 AM PDT Fri Jul 24 2026 Hurricane Fausto in the tropical Eastern Pacific will generate a long period southwesterly swell which is forecast to reach the coastline of the San Francisco Bay Area and Central Coast this weekend. As such, sneaker waves and strong rip currents are the primary concerns. However, breaking waves can reach up to 10 feet along some south and southwest facing beaches and break points (like Santa Cruz, Pacifica, and parts of Stinson or Ocean Beach). Sneaker waves can have 20+ minutes in between the larger sets (breaking waves) with significant "flat/calm looking" times between them. This can potentially catch beachgoers by surprise and resulting in people being swept into the cold water; hence the name "sneaker". Rip currents are strong enough to pull the strongest swimmers away from shore. Swim near a lifeguard if possible. Stay back from the beach, and away from jetties, piers, beachside rocks, and other infrastructure near the water. Never turn your back to the ocean! A Beach Hazards Statement is in effect from Saturday morning through Tuesday afternoon for all beaches along the Pacific Coast. RGass && .MTR WATCHES/WARNINGS/ADVISORIES... CA...Beach Hazards Statement from Saturday morning through Tuesday afternoon for CAZ006-505-509-529-530. PZ...Small Craft Advisory until 9 PM PDT this evening for Mry Bay. Small Craft Advisory from 9 AM to 9 PM PDT Saturday for Mry Bay. Small Craft Advisory until 3 PM PDT Sunday for Pigeon Pt to Pt Pinos 0-10 nm-Pt Arena to Pt Reyes 0-10 nm. Gale Warning until 9 PM PDT this evening for Pt Pinos to Pt Piedras Blancas 0-10 nm. Small Craft Advisory until 3 PM PDT Saturday for Pigeon Pt to Pt Pinos 10-60 NM. && $$ SHORT TERM...JM LONG TERM....JM AVIATION...Flynn MARINE...Flynn 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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