Marine Weather and Tide Forecast for Millbrae, CA

SHORT TERM
(This evening through Tuesday)
Issued at 128 PM PST Mon Jan 13 2025

Clear skies and cool temps abound under a dry airmass and weak offshore flow. A weak closed upper low off the coast of SoCal moved through this morning, leading to a brief period of gusty winds that are still lingering in some areas, but are easing through midday. As such, the Wind Advisory has been cancelled, and is no longer in effect. Not really much else to talk about for the daytime today.
Chilly overnight temperatures will be the story again tonight with temps in the mid-to-upper 30s across most interior areas, and even some coastal areas such as Santa Cruz and the Monterey Bay area. A Frost Advisory has been issued for all of the interior North Bay, Bay Area, and Central Coast, as well as the Monterey Bay coastal areas for tonight until 9 AM Tuesday morning.

Regarding smoke in the sky; you may notice a slightly more reddish hue to the sunset this evening thanks to some very light smoke concentration from some burning up in Canada, as well as the SoCal fires. This smoke is not expected to cause any issues since it will mostly be aloft and will be drifting out over the waters.

LONG TERM
(Tuesday night through next Sunday)
Issued at 128 PM PST Mon Jan 13 2025

Quite a quiet pattern with quite the signal for no rain in quite a while. Make sense? Good. (coffee-fueled meteorologist brain fog enters the chat)

Longwave ridging over the northeast Pacific and Gulf of Alaska with a few embedded shortwaves dominates the West Coast pattern through the next seven days. However, none of these cold-core shortwave troughs will be deep enough to overcome the broad ridge pattern that will eventually envelope the West Coast by mid-to-late this week.
These shortwaves feed into a deeper upper low out of the Hudson Bay, promoting a very cold setup much of the rest of the US. However, this also promotes a highly amplified ridge over the West Coast which appears to remain stagnant through much of the last half of the month as the Hudson Bay low persists. Unfortunately for us, this means there is very little to no chance of rain for the second half of January. The good news is that most of the Bay Area, and the North Bay especially, have seen decent rain so far this year, so fuel indices in regard to fire weather will take some time to respond. Central Coast fuels are more on the drier side and will dry out more quickly though. Will certainly be something to keep an eye on through these next couple of weeks.

AVIATION
(18Z TAFS)
Issued at 954 AM PST Mon Jan 13 2025

VFR through the TAF period. Periods of gusty winds will persist through early morning across the Bay Area terminals before easing by this afternoon and especially so this evening. The threat of LLWS across the North Bay has diminished as well. Winds will be light/variable into the night and even into Tuesday morning.

Vicinity of SFO...VFR through the TAF period. Breezy to gusty northeast winds will affect the SF Bay through the morning and into the afternoon before winds ease. Winds become light/variable into Tuesday morning.

SFO Bridge Approach...Similar to SFO.

Monterey Bay Terminals...VFR through the TAF period. Light/variable winds this morning for MRY and southerly for SNS. They will become onshore this afternoon for a brief period. Southeast drainage winds build into early Tuesday morning for SNS.

MARINE
(Today through Saturday)
Issued at 954 AM PST Mon Jan 13 2025

Gale force gusts linger in the northern outer waters early this morning with other areas seeing breezy to gusty winds lasting through the afternoon. Hazardous conditions for small crafts will persist through the midday with elevated wave heights between 9 to 13 feet expected. Winds ease and seas subside into the week.

MTR WATCHES/WARNINGS/ADVISORIES
CA...Frost Advisory from 1 AM to 9 AM PST Tuesday for CAZ504-506-510- 512>518-528>530.

PZ...Small Craft Advisory until 3 PM PST this afternoon for Pigeon Pt to Pt Pinos 10-60 NM-Pt Arena to Pt Reyes 0-10 nm-Pt Arena to Pt Reyes 10-60 NM-Pt Reyes to Pigeon Pt 0-10 nm-SF Bay N of Bay Bridge.