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PZZ530 San Pablo Bay, Suisun Bay, The West Delta And The San Francisco Bay North Of The Bay Bridge- 800 Pm Pst Thu Dec 7 2023
Tonight..NW winds 10 to 15 knots. A slight chance of rain this evening.
Fri..N winds 10 to 15 knots with gusts up to 25 knots.
Fri night..NW winds 10 to 15 knots with gusts up to 25 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 around 5 knots.
Mon..NW winds around 5 knots.
Tue..N winds 5 to 10 knots.

PZZ500 800 Pm Pst Thu Dec 7 2023
Synopsis for the central california coast and bays including the Monterey bay..Greater farallones...and cordell bank national marine sanctuaries...
a cold front over the north central coast will continue to move southeastward tonight. Elevated seas between 12 and 15 feet will persist through late week as a series of long period northwest swells propagate through the waters, resulting in hazardous conditions for small crafts.

FXUS66 KMTR 080556 AFDMTR

Area Forecast Discussion National Weather Service San Francisco CA 953 PM PST Thu Dec 7 2023

New AVIATION, MARINE

SYNOPSIS
Issued at 1233 PM PST Thu Dec 7 2023

Rain comes to an end by late in the day. Cold overnight temperatures are expected for the next couple of nights, especially across the interior. Warming trend expected early next week.

UPDATE
Issued at 745 PM PST Thu Dec 7 2023

Showers mostly coming to an end as the front moves out of the area. Very isolated, light showers will linger into the overnight hours, but wouldn't expect much more in the way of accumulation.
Forecast appears on track for cold temperatures tonight with a Freeze Warning in place for the North Bay Valleys and interior Monterey and San Benito counties.

SHORT TERM
(This evening through Friday)
Issued at 1233 PM PST Thu Dec 7 2023

Light to moderate rain is moving across the North Bay as of this writing, will sweep through the Bay Area between 12 PM - 2 PM, and then arrive along the Central Coast early/mid afternoon. Rainfall amounts will be light with the North Bay coastal ranges seeing the highest totals, up to 0.25". Around 0.10" is expected in the North Bay Valleys and across the City, then amounts tapper downward as one heads south.

A colder air mass will then settle into the region overnight. Lows are expected to cool into the lower 30s in the wind-sheltered interior. Elsewhere, expecting temperatures to lower into the mid 30s to lower 40s. A Frost Advisory has been issued for the North Bay Valleys, Southern Salinas Valley, southern portions of Monterey/San Benito counties for tonight.

Tomorrow, high temperatures will struggle to warm above the upper 50s (lower 40s in the peaks).

LONG TERM
(Friday night through next Wednesday)
Issued at 1233 PM PST Thu Dec 7 2023

Saturday morning will be the coldest with interior areas dropping into the mid 20s to lower 30s. For this, we have a Freeze Watch in effect for the aforementioned zones. A gradual warming trend will resume heading into next week.

AVIATION
(06Z TAFS)
Issued at 953 PM PST Thu Dec 7 2023

Conditions are currently MVFR-VFR except for occasional local IFR at a few of the terminals. Patchy fog, possibly dense fog, /LIFR-IFR/ developing tonight and Friday morning due to moistened boundary layer air, light winds, clearing, long December night-time radiative cooling to space. Statistical guidance e.g. for KSTS is weighted toward fog tonight and Friday morning. The 00z Oakland upper air sounding showed the highest distribution of water vapor at and below 8500 feet, drier above 8500 feet. The synoptic pattern transitions from mid to upper level troughing this evening to ridging, including lower to mid level thermal ridging Friday. Surface high pressure builds over far northern California to the Great Basin resulting in offshore winds Friday through Friday night.

Vicinity of SFO...VFR, west wind 5 to 10 knots this evening.
If surface winds diminish to light then fog /LIFR-IFR/ is more likely to develop late tonight and Friday morning; added in IFR in the 06z TAF for Friday morning. Otherwise mixing winds resulting in VFR for KSFO Friday, best chances VFR late morning and afternoon.
Light north to northeast surface winds Friday night.

SFO Bridge Approach...Similar to SFO

Monterey Bay Terminals...MVFR-VFR except KSNS reports IFR ceiling.
Boundary layer air moistened from rain may result in additional patchy low cloud ceilings and/or fog /LIFR-IFR/ overnight and Friday morning.
Mixing winds Friday resulting in VFR.

MARINE
(Tonight through next Tuesday)
Issued at 942 PM PST Thu Dec 7 2023

A cold front over the north Central Coast will continue to move southeastward tonight. Elevated seas between 12 and 15 feet will persist through late week as a series of long period northwest swells propagate through the waters, resulting in hazardous conditions for small crafts.

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

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

PZ...Small Craft Advisory until 9 AM PST Friday 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 Friday for Pigeon Pt to Pt Pinos 10-60 NM-Pt Arena to Pt Reyes 10-60 NM.

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Alcatraz Island
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Thu -- 12:45 AM PST     1.53 feet Low Tide
Thu -- 01:46 AM PST     Moonrise
Thu -- 07:11 AM PST     Sunrise
Thu -- 07:38 AM PST     5.44 feet High Tide
Thu -- 01:43 PM PST     Moonset
Thu -- 02:14 PM PST     1.40 feet Low Tide
Thu -- 04:50 PM PST     Sunset
Thu -- 08:10 PM PST     3.83 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION

Alcatraz Island, San Francisco Bay, California, Tide feet

Alcatraz Island W
Click for Map
Thu -- 01:46 AM PST     Moonrise
Thu -- 02:23 AM PST     0.00 knots Slack
Thu -- 05:31 AM PST     2.05 knots Max Flood
Thu -- 07:11 AM PST     Sunrise
Thu -- 08:53 AM PST     -0.00 knots Slack
Thu -- 11:42 AM PST     -1.84 knots Max Ebb
Thu -- 01:43 PM PST     Moonset
Thu -- 03:27 PM PST     0.00 knots Slack
Thu -- 04:50 PM PST     Sunset
Thu -- 06:19 PM PST     1.75 knots Max Flood
Thu -- 09:30 PM PST     -0.01 knots Slack
Thu -- 11:53 PM PST     -1.34 knots Max Ebb
Tide / Current data from XTide NOT FOR NAVIGATION

Alcatraz Island W, San Francisco Bay, California Current, knots

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