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PZZ530 San Pablo Bay, Suisun Bay, The West Delta And The San Francisco Bay North Of The Bay Bridge- 831 Am Pst Fri Dec 8 2023
Today..N winds 15 to 25 knots. Gusts up to 25 knots this afternoon.
Tonight..NW winds 5 to 10 knots.
Sat..NE winds 5 to 10 knots.
Sat night..NE winds 5 to 10 knots.
Sun..NE winds 5 to 10 knots.
Sun night..NW winds 5 to 10 knots.
Mon..NW winds around 5 knots.
Tue..N winds around 5 knots.

PZZ500 831 Am Pst Fri Dec 8 2023
Synopsis for the central california coast and bays including the Monterey bay..Greater farallones...and cordell bank national marine sanctuaries...
moderate to fresh northerly breezes will prevail today behind yesterday's cold front. Elevated seas remain in place into tonight as a series of long period northwest swells propagate through the waters. Fresh to strong breezes are expected to return for the offshore waters by early to mid next week.

FXUS66 KMTR 081624 AFDMTR

Area Forecast Discussion National Weather Service San Francisco CA 824 AM PST Fri Dec 8 2023

New UPDATE

SYNOPSIS
Issued at 1235 AM PST Fri Dec 8 2023

High pressure will bring quiet weather over the next several days.
Cold overnights and interior frost/freezing conditions are expected before a gradual warming trend occurs early next week.

UPDATE
Issued at 822 AM PST Fri Dec 8 2023

To finish off the work week the Bay Area begins with mostly sunny skies, but chilly to cold temperatures. Clear skies and light winds this morning led to some chilly/cold temperatures across the interior valleys. Shouldn't be surprising, but the coldest locations were across the interior N Bay and interior Monterey/San Benito. Several locations were at or below the freezing mark. The cold temperatures are highlighted by the Freeze Warning that is in effect through 9 AM.

While most areas are sunny, the long nights, ample low level moisture, and light winds led to patchy dense fog. Fog is most dense and more widespread in the Central Valley, but pockets of dense fog have impacted the North Bay and East Bay. Latest vis satellite do show thinning of the fog and expect this trend to continue through mid-morning.

No update needed...

SHORT TERM
(Today and tonight)
Issued at 1235 AM PST Fri Dec 8 2023

A surface cold front was pushing south of the area this morning as an expansive low-level ridge builds into the region from the eastern Pacific. The post-frontal regime brought a colder airmass and drying aloft, albeit with enough residual surface layer moisture remaining for pockets of fog -- some locally dense -- to develop. Outside of monitoring visibility this morning the primary concern is colder temperatures. Readings are already dipping into the 30s within the coldest interior valleys this morning and Freeze Warnings remain in effect for the North Bay and interior Monterey and San Benito Counties. High temperatures this afternoon should rebound into the upper 50s to near 60 before even colder conditions arrive tonight.
Given ideal conditions for radiational cooling the coldest portions of the area should reach into frost/freeze territory once again.
Thus the Freeze Watches for the North Bay Valleys and interior Monterey and San Benito Counties were converted to Freeze Warnings for tonight. Make sure to protect people, pets, plants and pipes from the cold.

LONG TERM
(Saturday through Thursday)
Issued at 1235 AM PST Fri Dec 8 2023

The primary concern through the weekend remains cold overnight temperatures. A Freeze Warning will continue for the North Bay valleys and inland Central Coast Saturday morning. Freeze Watches were also hoisted for these same areas for late Saturday night into Sunday morning.

Relatively quiet weather will prevail for the remainder of the week with gradually warming daytime temperatures. Overnight readings will remain cool however with the coldest interior locations dipping into the upper 30s and 40s. Daytime highs will be mostly in the 60s.

Looking ahead deterministic models and their ensembles suggest a more unsettled pattern may develop around December 16th-18th. But that's pretty far out for the moment so we'll need time for the details to be ironed out. That said, it looks like rain will re- enter the forecast picture around this time.

AVIATION
(12Z TAFS)
Issued at 307 AM PST Fri Dec 8 2023

Patchy MVFR with mist in the North Bay, VFR elsewhere. While the conditions were close, widespread dense fog does not look like it will materialize this morning. Some patches remain, but the overall trend has been improving, despite the temperatures continuing to drop to several degrees below normal. The saving grace was dry air behind the recently passed cold front. There was just enough wind to mix the drier air down to the surface and keep the dew point out of reach of the rapidly falling temperatures overnight. STS will likely improve to VFR within a couple hours, while the timing at APC is a little more uncertain.

Vicinity of SFO...VFR with gentle to moderate NW wind today.
Mostly sunny skies will prevail through the TAF period and beyond.
By tonight, winds will gradually shift from NW to N and possibly NE by Sat morning, although speeds will remain light.

SFO Bridge Approach...Similar to SFO

Monterey Bay Terminals...VFR conditions for both MRY and SNS through the TAF period. There's a small chance SNS will develop MVFR visibility before sunrise, and the TAF hints at this with 6SM BR in the morning. Otherwise it looks like a good day to fly with light winds increasing to a gentle NW breeze in the afternoon.

MARINE
(Today through Wednesday)
Issued at 307 AM PST Fri Dec 8 2023

Moderate to fresh northerly breezes will prevail today behind a cold front. Elevated seas will remain in place into tonight as a series of long period northwest swells propagate through the waters. Fresh to strong breezes are expected to return for the offshore waters by early to mid next week.

MTR WATCHES/WARNINGS/ADVISORIES
CA...Freeze Warning until 9 AM PST this morning for CAZ506-516-518.

Freeze Warning from midnight tonight to 10 AM PST Saturday for CAZ506-516-518.

Freeze Watch from late Saturday night through Sunday morning for CAZ506-516-518.

PZ...Small Craft Advisory until 9 AM PST this morning for Pigeon Pt to Pt Pinos 0-10 nm-Pt Arena to Pt Reyes 0-10 nm-Pt Reyes to Pigeon Pt 0-10 nm.

Small Craft Advisory until 3 AM PST Saturday for Pt Pinos to Pt Piedras Blancas 0-10 nm.

Small Craft Advisory until 9 PM PST this evening for Pigeon Pt to Pt Pinos 10-60 NM-Pt Arena to Pt Reyes 10-60 NM.

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Berkeley
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Fri -- 01:45 AM PST     1.95 feet Low Tide
Fri -- 02:46 AM PST     Moonrise
Fri -- 07:12 AM PST     Sunrise
Fri -- 08:13 AM PST     5.78 feet High Tide
Fri -- 02:05 PM PST     Moonset
Fri -- 03:08 PM PST     0.79 feet Low Tide
Fri -- 04:49 PM PST     Sunset
Fri -- 09:28 PM PST     3.97 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION

Berkeley, California, Tide feet

Berkeley Yacht Harbor .9 mi S
Click for Map
Fri -- 01:35 AM PST     0.00 knots Slack
Fri -- 02:46 AM PST     Moonrise
Fri -- 05:33 AM PST     0.25 knots Max Flood
Fri -- 07:12 AM PST     Sunrise
Fri -- 08:54 AM PST     -0.00 knots Slack
Fri -- 11:39 AM PST     -0.36 knots Max Ebb
Fri -- 02:05 PM PST     Moonset
Fri -- 02:41 PM PST     0.01 knots Slack
Fri -- 04:49 PM PST     Sunset
Fri -- 06:33 PM PST     0.26 knots Max Flood
Fri -- 09:58 PM PST     -0.00 knots Slack
Tide / Current data from XTide NOT FOR NAVIGATION

Berkeley Yacht Harbor .9 mi S, San Francisco Bay, California Current, knots

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