San Francisco Bay South of the Bay Bridge Marine Forecast
| Today...Ne Wind Around 5 Kt, Backing To Nw This Afternoon. Waves Around 2 Ft Or Less. |
| Tonight...Nw Wind 5 To 10 Kt, Becoming E After Midnight. Waves Around 2 Ft Or Less. |
| Wed...E Wind Around 5 Kt, Backing To N In The Afternoon. Waves Around 2 Ft Or Less. |
| Wed Night...Ne Wind Around 5 Kt In The Evening, Becoming Light And Variable. Waves Around 2 Ft Or Less. |
| Thu...Ne Wind Around 5 Kt, Backing To Nw Around 5 Kt In The Afternoon. Waves Around 2 Ft Or Less. |
| Thu Night...Light And Variable Winds. Waves Around 2 Ft Or Less. |
| Fri...S Wind Around 5 Kt, Veering To W Around 5 Kt In The Afternoon. Waves Around 2 Ft Or Less. |
| Fri Night...W Wind Around 5 Kt In The Evening, Becoming Light And Variable. Waves Around 2 Ft Or Less. |
| Sat...E Wind Around 5 Kt, Backing To Nw In The Afternoon. Waves Around 2 Ft Or Less. |
| Sat Night...N Wind Around 5 Kt. Waves Around 2 Ft Or Less. |
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Area Forecast Discussion National Weather Service San Francisco CA 329am PST Tuesday Jan 14 2025 .SHORT TERM... (Today and tonight) Issued at 1224am PST Tuesday Jan 14 2025 The nocturnal cooling is behaving more predictably tonight with the weaker offshore winds. Scattered to broken high clouds are streaming across the cwa, which will take the edge off the cooling. Many inland areas are already in the mid to upper 30s, but many coastal areas have some light downslope winds keeping them in the mid to upper 40s. The 500 mb pattern is stabilizing as an elongated ridge over northern California and a vertically stacked, cut-off low roughly 500 miles west of Baja. This is supporting geostrophic NE winds through the depth of the atmosphere. At the surface, the gradient between a 1037 mb high over NE Nevada and a 1027 mb low near Vallejo is supporting moderate offshore winds across higher terrain, weak offshore flow at the coast, and mostly calm winds in the valleys. The wind speed will gradually decrease as this gradient relaxes through the day. Otherwise, it's another day of comfortable afternoon temperatures and ample sunshine. Long Term (Wednesday through Monday) Issued at 1224am PST Tuesday Jan 14 2025 The Baja cyclone has lost any upper-level divergence provided from the jet stream, and it will slowly begin to fill while meandering around the subtropical East Pacific. By the end of the week, this system will finally be absorbed back into the westerlies and kicked inland. There is very high certainty that the next pattern in line is another omega block with a high amplitude ridge off the coast and a deep, cold trough over the central US. What does that mean for the long term forecast? It's pretty boring locally. Mostly clear skies, cold mornings, gentle winds, and no chance of rain. Next week looks pretty similar at this point, perhaps a bit colder. This prolonged dry spell is unusual in January. There is a good chance we end the month in the top 5 or 10 driest on record. Take this with a grain of salt, but there is some agreement between the extended global models that the dry anomaly will last until mid-February. That's not to say we won't get any rain, just that it looks to stay drier than normal. Marine (Today through Sunday) Issued at 324am PST Tuesday Jan 14 2025 High pressure over the Eastern Pacific and low pressure inland will maintain northerly flow over the coastal waters. Winds will be relatively light with the strongest winds north of Point Reyes. Sea state will remain relatively low with a moderate period. Northwest winds will build as well as wave heigheights late in the week and into the upcoming weekend. NOAA San Francisco Bay Area Office: Watches - Warnings - Advisories CA...Frost Advisory until 9am PST this morning for CAZ504-506-510- 512>518-528>530. PZ...None. |
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