San Francisco Bay north of the Bay Bridge, including San Pablo Bay, Suisun Bay, and West Delta, CA Marine Forecast
| Today...Nw Winds 15 To 25 Knots. |
| Tonight...W Winds 10 To 20 Knots With Gusts Up To 30 Knots. |
| Fri...W Winds 10 To 20 Knots With Gusts Up To 25 Knots. |
| Fri Night...W Winds 10 To 20 Knots With Gusts Up To 25 Knots. |
| Sat...W Winds 10 To 15 Knots. |
| Sat Night...W Winds 10 To 15 Knots. |
| Sun...W Winds 10 To 15 Knots With Gusts Up To 25 Knots. |
| Mon...W Winds 10 To 15 Knots. |
| Area Forecast Discussion National Weather Service San Francisco CA 1249am PDT Thu April 25 2024 ...New SYNOPSIS, SHORT TERM, Long Term Synopsis Issued at 1201am PDT Thu April 25 2024 Cool temperatures will continue today. A cold front will bring a chance for light rain beginning tonight, with strong winds Friday night. Increasing sunshine will kick off a warming trend Sat-Tue. .SHORT TERM... (Today and tonight) Issued at 1201am PDT Thu April 25 2024 A coastal surface trough will continue to weaken and move inland, allowing a low-amplitude ridge to build. This will cause the marine layer to compress to about 1,500 ft. Compared to the 4,000 ft deep marine layer observed Wednesday, the low overcast today will be more limited to the coast and adjacent low valleys. The standard NW flow will also return as the trough weakens. The cool temperatures will continue, with highs generally in the 60s. This ridge pattern will be short lived as a cold front moves through on Friday. Long Term (Friday through Wednesday) Issued at 1201am PDT Thu April 25 2024 Some light rain is possible starting ahead of the cold front Thursday night, with low Probability of Precipitation lasting though the day Friday. 22/26 members of the SREF have some precipitation falling at SFO between Thursday night and Friday, but only 4 of them are above 0.05" of accumulation, and none of those are above 0.1". Similar results are found throughout the Bay Area, with slightly more bullish results along the Central Coast. As such, I have increased the NBM Probability of Precipitation to at least 15% to ensure a slight chance of rain is mentioned, but did not increase the Quantitative Precipitation Forecast from the WPC guidance, which is near zero. There's a decent chance some rain falls late Thursday-Friday, but it will be light. The bigger impact will be from strong NW winds behind the cold front. 24 hours ago, it looked like a slam dunk wind advisory along the coast, but the models have backed off since then. NBM is on the high side of the guidance, but only shows a slight chance of exceeding 40 mph gusts along the coast on Friday night. The timing of the strongest winds has also shifted from Friday afternoon to overnight Friday. Based on this, and the fact that other deterministic models are even less aggressive, we are not hoisting a wind advisory at this time. That being said, there will be plenty of gusts above 30 mph on Friday and Saturday with some minor impacts expected. The weekend will feature clearing skies and slightly warmer temperatures, although Saturday will still be breezy. The gradual warm-up will continue through early next week, as the region returns to seasonal temperatures under mostly clear skies. The next threat of rain arrives late next week. Marine (Tonight through next Tuesday) Issued at 1122pm PDT Wednesday April 24 2024 Gentle to moderate NW winds continue into Friday with occasional moderate to fresh gusts possible throughout portions of the coastal waters. Gustier fresh to strong winds with near gale force and isolated gale force gusts possible heading into Friday as an upper level trough and surface low pressure system move inland. Moderate period northwest swell will continue to move through the waters through Saturday. Light long period southerly swell continues through end of forecast period. NOAA San Francisco Bay Area Office: Watches - Warnings - Advisories CA...None. PZ...Small Craft Advisory from 9am this morning to 9pm PDT this evening for Mry Bay. Small Craft Advisory until 3pm PDT this afternoon for Pt Arena to Pt Reyes 0-10 nm. Small Craft Advisory until 3pm PDT this afternoon for Pigeon Pt to Pt Pinos 10-60 NM-Pt Reyes to Pigeon Pt 0-10 nm. Small Craft Advisory from 9am this morning to 3am PDT Friday for Pt Pinos to Pt Piedras Blancas 0-10 nm. Small Craft Advisory until 9am PDT this morning for Pt Arena to Pt Reyes 10-60 NM. |
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