NOTE: Some of the data on this page has not been verified and should be used with that in mind. It may and occasionally will, be wrong. The tide reports are by xtide and are NOT FOR NAVIGATION. Privacy and Cookie policy

PZZ530 San Pablo Bay, Suisun Bay, The West Delta And The San Francisco Bay North Of The Bay Bridge- 815 Pm Pst Sat Dec 2 2023
Tonight..SW winds 5 to 10 knots...becoming S after midnight. Rain likely.
Sun..SW winds 5 to 10 knots. A chance of rain.
Sun night..W winds 5 to 10 knots. A slight chance of rain.
Mon..N winds around 5 knots.
Mon night..W winds around 5 knots.
Tue..NE winds around 5 knots.
Tue night..W winds around 5 knots. A chance of rain.
Wed..SW winds 5 to 10 knots. Rain likely.
Thu..W winds 5 to 10 knots. A chance of rain.

PZZ500 815 Pm Pst Sat Dec 2 2023
Synopsis for the central california coast and bays including the Monterey bay..Greater farallones...and cordell bank national marine sanctuaries...
gentle to moderate westerly breezes will persist through the weekend along with periodic chances for light showers. Northwest swell will persist into Monday with elevated seas, particularly over the northern offshore waters. Another northwest swell will follow, creating larger waves with 16-21 second periods through the upcoming week. Hazardous conditions for small craft operators are anticipated.

FXUS66 KMTR 030544 AFDMTR

Area Forecast Discussion National Weather Service San Francisco CA 944 PM PST Sat Dec 2 2023

New AVIATION

SYNOPSIS
Issued at 233 AM PST Sat Dec 2 2023

Cool, unsettled weather for the next few days followed by a warming trend into early next week. An approaching trough of low pressure towards the middle of the upcoming week will bring the return of unsettled weather.

UPDATE
Issued at 816 PM PST Sat Dec 2 2023

Spotty light showers continue across the Bay Area this evening.
Light measurable amounts in the 0.01" to 0.1" range were noted over portions of the region during the past 3 hours, with a few localized spots in the Sonoma Coastal Range picking up a bit more.
Measurable amounts should become much harder to come by later tonight but there may be enough to wet the pavement in spots here and there. Shower chance will gradually wane south of the Golden Gate into Sunday as high pressure builds in from the southwest. The going forecast captures all this quite well and no changes are needed this evening.

SHORT TERM
(This evening through Sunday)
Issued at 110 PM PST Sat Dec 2 2023

KMUX radar continues to pick up widely scattered showers moving through the Bay Area (Monterey/San Benito still dry) this afternoon. Automated sensors have tipped a few hundredths since this morning. Despite scattered showers moving through the region there are pockets of sunshine peeking through the clouds.
Temperatures this afternoon will top out in the 50s and 60s, which is close to or below seasonal averages for early December.

Tonight through Sunday...the shower activity that made it as far south as Santa Cruz will begin to move northward this evening/tonight as high pressure aloft begins to slowly build in from the SW. Sunday will be split with shower chances: south of the Golden Gate will be dry while the North Bay could still see some showers through Sunday evening.

LONG TERM
(Sunday night through next Friday)
Issued at 150 PM PST Sat Dec 2 2023

All shower activity tapers off Sunday night into Monday as the upper level ridge strengthens over the region. Drier weather warmer temperatures to start the work week. In fact, pretty solid warm up by Tuesday with highs reaching the upper 60s to mid 70s, which is above normal for this time of year.

The warm and dry weather quickly comes to an end Tuesday night into Wednesday as a cold front approaches from the NW. This front will bring precip back into the forecast by early Wednesday. Rain will initially be possible over the North Bay on Wednesday morning before spreading south through the day. Wet weather will linger into Friday. Once again, not a big rain maker but 0.01"-0.25" most areas and 0.25"-1.0" North Bay. Unlike the last system the late week system will usher in a much colder airmass. Snow levels will actually drop Thursday night into Friday to near 4k feet.
Therefore, cannot rule out some wet snow over the highest peaks.
At this point, not expecting any accumulation, but some snow is possible.

The bigger concerns with the colder airmass will be the overnight lows Friday night and beyond. The coast and bays will be spared from the real cold temperatures, but interior valleys will be in the low to mid 30s with a few isolated spots in the upper 20s.

AVIATION
(06Z TAFS)
Issued at 944 PM PST Sat Dec 2 2023

This forecast has proven to be very challenging as guidance has greatly differed from one hour to the next and clouds have scattered out that were forecast to stick around. APC will be in IFR territory between 11Z and 18Z and STS will be in LIFR territory between 8Z and 17Z. While OAK and SFO are in close proximity, it is looking like OAK will be receiving the brunt of things as they are forecast to stay MVFR between now and 20Z while SFO is now forecast to escape ceilings due to confidence being too low.

Vicinity of SFO... Currently VFR. Guidance has differed every hour on what the terminal is going to see in the way of MVFR ceilings.
There is now too low of confidence to include MVFR ceilings in the TAF as the consensus blend of high resolution models is now only highlighting it for the hour of 15Z and GFS LAMP has also significantly backed off with their probabilities with their timeframe potentially being 14Z-16Z. There are ceilings of about 2,000 feet upstream so it is not out of the realm of possibility that SFO may see something, but it is seeming more unlikely. Winds tomorrow will be breezy and onshore.

SFO Bridge Approach...Similar to SFO.

Monterey Bay Terminals...Currently VFR at MRY and MVFR at SNS.
Climatological models and the RAP are showing IFR ceilings for the terminals overnight while the consensus blend of high resolution models is keeping the IFR ceilings in the Central Monterey Bay Area.
That being said, confidence was not high enough to include IFR ceilings in the TAFs down here, but a low scattered group was included. Both terminals will experience E/SE winds overnight before switching to breezy onshore flow after the clearing of ceilings in the late morning.

MARINE
(Tonight through next Thursday)
Issued at 816 PM PST Sat Dec 2 2023

Gentle to moderate westerly breezes will persist through the weekend along with periodic chances for light showers. Northwest swell will persist into Monday with elevated seas, particularly over the northern offshore waters. Another northwest swell will follow, creating larger waves with 16-21 second periods through the upcoming week. Hazardous conditions for small craft operators are anticipated.

MTR WATCHES/WARNINGS/ADVISORIES
CA...None.
PZ...Small Craft Advisory until 3 PM PST Monday for Pt Arena to Pt Reyes 10-60 NM.

Small Craft Advisory from 3 AM to 3 PM PST Sunday for Pigeon Pt to Pt Pinos 10-60 NM.

toggle option: (graph/table)

Corte Madera Creek
Click for Map
Sun -- 05:42 AM PST     4.72 feet High Tide
Sun -- 07:08 AM PST     Sunrise
Sun -- 10:50 AM PST     3.20 feet Low Tide
Sun -- 12:14 PM PST     Moonset
Sun -- 03:33 PM PST     4.72 feet High Tide
Sun -- 04:50 PM PST     Sunset
Sun -- 10:51 PM PST     Moonrise
Sun -- 10:52 PM PST     0.41 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION

Corte Madera Creek, San Francisco Bay, California, Tide feet

Point San Quentin 1.9 mi E
Click for Map
Sun -- 12:28 AM PST     0.01 knots Slack
Sun -- 03:32 AM PST     1.45 knots Max Flood
Sun -- 06:56 AM PST     -0.00 knots Slack
Sun -- 07:08 AM PST     Sunrise
Sun -- 09:19 AM PST     -0.91 knots Max Ebb
Sun -- 12:14 PM PST     Moonset
Sun -- 12:52 PM PST     0.00 knots Slack
Sun -- 03:07 PM PST     0.68 knots Max Flood
Sun -- 04:50 PM PST     Sunset
Sun -- 05:37 PM PST     -0.00 knots Slack
Sun -- 09:16 PM PST     -2.01 knots Max Ebb
Sun -- 10:51 PM PST     Moonrise
Tide / Current data from XTide NOT FOR NAVIGATION

Point San Quentin 1.9 mi E, San Francisco Bay, California Current, knots

Full Color Weather Map

Link to Loop


Other links: GEOS-West     Contential US     Full GOES-East

Sacramento, CA,