Friday, December6, 2019
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Marine Weather and Tides
Stanford, CA

Version 3.4
NOTICE
10/9/2019 Updated the Marine Zones.
9/4/2019 Fixed the weather maps due to NOAA moving them.
7/25/2019 New feature in the Airports section gives a link to 5 minute updates for data reports.
6/2/2019. Many thanks to a user for reporting an error on one of the Edit pages. The switch to PHP 7.2 caused many pages that previously worked to quit working. I fixed many but I still depend on users to report ones I missed. Please report errors HERE or send an email to me at L-36.com. Allen

Sunrise 7:06AMSunset 4:52PM Thursday December 5, 2019 9:09 PM PST (05:09 UTC) Moonrise 1:37PMMoonset 12:39AM Illumination 68% Phase: Waxing Gibbous; Moon at 9 days in cycle
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.
Marine Forecasts
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PZZ531 San Francisco Bay South Of The Bay Bridge- 155 Pm Pst Thu Dec 5 2019
.small craft advisory in effect from Friday morning through late Friday night...
Rest of today..S winds 5 to 10 kt.
Tonight..SE winds 5 to 15 kt.
Fri..SE winds 10 to 20 kt with gusts up to 25 kt. Showers likely.
Fri night..SE winds 15 to 25 kt with gusts up to 35 kt. Showers and a slight chance of Thunderstorms.
Sat..S winds 10 to 15 kt with gusts up to 25 kt. Showers and a slight chance of Thunderstorms.
Sat night..S winds 5 to 10 kt. Rain.
Sun..W winds 5 to 15 kt. Rain likely.
Mon..N winds around 5 kt. Winds and wind waves higher in and near Thunderstorms.
PZZ500 155 Pm Pst Thu Dec 5 2019
Synopsis for the central california coast and bays including the Monterey bay..Greater farallones...and cordell bank national marine sanctuaries... Southerly winds will continue to steadily strengthen into tonight and tomorrow morning ahead of an advancing cold front. Gale force winds are expected by early Friday and persist through Friday night. Moderate northwest swell will gradually build to around 10 to 15 feet Friday over the northern waters then spread south across the coastal waters over the weekend.


7 Day Forecast for Marine Location Near Stanford, CA
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location: 37.45, -122.17     debug


Area Discussion for - San Francisco/Monterey Bay Area, CA
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FXUS66 KMTR 060105 AFDMTR

Area Forecast Discussion National Weather Service San Francisco Bay Area 505 PM PST Thu Dec 5 2019

SYNOPSIS. Gearing up for another cold front which will sweep through the area late Friday and Saturday resulting in widespread rainfall and gusty winds. Post-frontal showers and potentially isolated thunderstorms will continue through Saturday night before tapering off on Sunday.

DISCUSSION. as of 1:56 PM PST Thursday . Under mostly cloudy skies, area temperatures are mild, ranging from the mid 50s to lower 60s, which are warmer than yesterday at this time by several degrees. Tonight is expected to see low temps generally from the mid 40s to lower 50s.

The next storm system is due impact the area on Friday and Saturday with rainfall and gusty winds. Light showers are expected to begin Friday ahead of this system. The cold front is expected to move into the North Bay late Friday afternoon then gradually moving south and east overnight. Given the dynamics with the potent cold front and ample moisture, rainfall intensity will be of concern across the North Bay, especially in the Kincade Burn area. Hourly rainfall rates could exceed one half an inch in an hour leading to debris flows or flash flooding. Therefore, a Flash Flood Watch has been issued for the Kincade burn area Friday afternoon through Saturday morning. By Saturday morning the cold front will have pushed through much of the Bay Area. However, the parent low and upper trough moving through will keep showers going across the Bay Area Saturday into Sunday. Enough instability will be present with the frontal passage and with the upper trough to justify a slight chance of thunderstorms for Friday and Saturday. Rainfall totals from Friday into early Sunday range from 0.50"-1.25" in most urban areas, except 1.50-2.50" in the North Bay Valleys. In the hills/mountains, rain totals are forecast to range from 1.50"-4.00" in the North Bay Mountains, 1.25- 1.5" for the East Bay Hills, 1.50-3.00" in the Santa Cruz Mountains, and 1.00-3.00" across Monterey and San Benito Co. Mountains. Lesser amounts will be possible in the southern Salinas Valley.

In addition to the rain, southerly winds will ramp up ahead of and with the frontal passage. Winds will be strongest over the coastal waters, near the coast, through south-east oriented valleys, and in the higher terrain. A wind advisory has been issued for the entire CWA from 10 AM Friday through 7 AM Saturday. Although the advisory is for the entire area, there will be wind- sheltered areas that will see lesser wind speeds, including the Monterey Bay coastline, and in the southern portion of the Santa Clara Valley.

Lingering showers will be possible on Sunday as the upper trough slowly exits. High pressure aloft building in over the state will bring drier weather to the area Monday through at least Wednesday. A weak system is forecast to move across Northern California on Wednesday which could bring a few showers to northern zones late Wednesday, although latest model runs have weakened this system further.

AVIATION. as of 5:00 PM PST Thursday . Low confidence on cloud forecast. Models indicate abundant low level moisture over the area through the evening so the latest forecasts call for MVFR cigs impacting SFO and the approach. S-SE winds begin to pick up above the surface tonight causing possible LLWS. Winds at the surface increase Friday morning ahead of the next frontal system. Light rain should reach the Bay Area Friday afternoon.

Vicinity of KSFO . Cigs will be in and out of MVFR range through the night. Bases predominately 3000-4000 ft. LLWS possible overnight tonight when winds at 2000 ft increase while surface winds stay light. Surface winds increase after 15Z with gusts to 15 kt. These winds will only increase as the day goes on Friday.

SFO Bridge Approach . Similar to KSFO.

Monterey Bay Terminals . Cigs remaining in the VFR range. South winds increasing in the Salinas Valley with gusts to 20 kt after 14Z.

MARINE. as of 04:48 PM PST Thursday . Southerly winds will continue to steadily strengthen into tonight and tomorrow morning ahead of an advancing cold front. Gale force winds are expected by early Friday and persist through Friday night. Moderate northwest swell will gradually build to around 10 to 15 feet Friday over the northern waters then spread south across the coastal waters over the weekend.

MTR WATCHES/WARNINGS/ADVISORIES. Tngt. SCA . Pigeon Pt to Pt Pinos 0-10 nm from 9 PM SCA . Pigeon Pt to Pt Piedras Blancas 10-60 nm from 9 PM SCA . Pt Pinos to Pt Piedras Blancas 0-10 nm SCA . Pt Arena to Pt Reyes 0-10 nm until 3 AM SCA . Pt Arena to Pigeon Pt 10-60 nm until 3 AM GLW . Pt Arena to Pt Reyes 0-10 nm from 3 AM GLW . Pt Arena to Pigeon Pt 10-60 nm from 3 AM SCA . Pt Reyes to Pigeon Pt 0-10 nm from 12 AM



PUBLIC FORECAST: Sims AVIATION: W Pi MARINE: DRP

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Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
RTYC1 - 9414523 - Redwood City, CA 5 mi51 min NNW 2.9 G 2.9 56°F 55°F1017.8 hPa
AAMC1 - 9414750 - Alameda, CA 23 mi51 min 53°F
LNDC1 25 mi51 min N 2.9 G 4.1 57°F 1017 hPa
OBXC1 26 mi57 min 55°F 55°F
OKXC1 - 9414776 - Oakland (Berth 34), CA 26 mi51 min NNE 1.9 G 1.9 54°F 1017.1 hPa
PXOC1 - 9414311 - San Francisco (Pier 1), CA 27 mi51 min NW 1.9 G 2.9 55°F 1016.1 hPa
FTPC1 - 9414290 - San Francisco, CA 29 mi63 min Calm G 0 55°F 53°F1017.3 hPa
PPXC1 - 9414847 - Richmond (Point Potrero), CA 33 mi57 min NNE 2.9 G 5.1 57°F 1017.4 hPa
TIBC1 - Tiburon Pier, San Francisco Bay, CA 34 mi124 min Calm 55°F 1018 hPa
46237 - San Francisco Bar, CA (142) 34 mi39 min 53°F4 ft
RCMC1 - 9414863 - Richmond, CA 35 mi51 min 54°F
46012 - HALF MOON BAY - 24NM South Southwest of San Francisco, CA 38 mi29 min SE 18 G 21 57°F 56°F1016.8 hPa55°F
MZXC1 - 9415102 - Martinez-Amorco CA 40 mi63 min NE 2.9 G 5.1 54°F 53°F1017.4 hPa54°F
UPBC1 41 mi51 min ENE 7 G 8
46026 - SAN FRANCISCO - 18NM West of San Francisco, CA 41 mi29 min SE 12 G 16 56°F 54°F1017 hPa
PCOC1 - 9415144 - Port Chicago, CA 42 mi51 min E 4.1 G 4.1 53°F 53°F1017.1 hPa
DPXC1 - 9415141 - Davis Point, San Pablo Bay, CA 42 mi57 min E 11 G 15 56°F 1016.8 hPa
PSBC1 - 9415115 - Pittsburg (Suisun Bay), CA 43 mi51 min SSE 1.9 G 1.9 54°F 1017.3 hPa
46042 - MONTEREY - 27NM West of Monterey Bay, CA 48 mi29 min SSE 18 G 23 58°F 57°F1017.2 hPa55°F
MLSC1 - Moss Landing, South Harbor, CA 49 mi80 min NNE 5.1 G 13 57°F 1017.7 hPa52°F
ELXC1 - Elkhorn Slough Reserve, CA 49 mi84 min NNE 2.9 55°F 1017 hPa53°F
46092 - MBM1 49 mi62 min S 16 58°F 57°F1016.4 hPa (+0.0)

Wind History for Redwood City, CA
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Palo Alto Airport, CA3 mi2.4 hrsNW 510.00 miMostly Cloudy57°F51°F82%1017.6 hPa
San Carlos Airport, CA7 mi82 minN 010.00 miMostly Cloudy57°F53°F88%1017.6 hPa
San Jose, San Jose International Airport, CA14 mi76 minN 010.00 miMostly Cloudy59°F51°F75%1017.1 hPa
Hayward, Hayward Air Terminal, CA15 mi75 minN 010.00 miOvercast58°F52°F81%1018 hPa
San Francisco, San Francisco International Airport, CA15 mi73 minNNE 410.00 miOvercast57°F52°F83%1016.8 hPa
Oakland, Metro Oakland International Airport, CA17 mi76 minNW 410.00 miOvercast58°F53°F84%1017.2 hPa
Half Moon Bay Airport, CA18 mi74 minSSE 810.00 miOvercast57°F51°F82%1016.9 hPa
San Jose / Reid / Hillv, CA20 mi79 minN 010.00 miMostly Cloudy59°F51°F77%1017.3 hPa

Link to 5 minute data for KPAO

Wind History from PAO (wind in knots)
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Last 24hr------------------CalmCalmCalmCalm4Calm33Calm3--NW4NW5NW4Calm
1 day ago------------------E3E4CalmCalmCalm5--4--------------
2 days ago------------------NE10E5CalmCalmCalmCalm--CalmCalmCalmCalmCalmCalmCalmCalm

Tide / Current Tables for Palo Alto Yacht Harbor, California
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Palo Alto Yacht Harbor
Click for Map
Fri -- 01:35 AM PST     Moonset
Fri -- 02:43 AM PST     1.38 feet Low Tide
Fri -- 07:08 AM PST     Sunrise
Fri -- 08:16 AM PST     7.68 feet High Tide
Fri -- 02:02 PM PST     Moonrise
Fri -- 03:33 PM PST     1.54 feet Low Tide
Fri -- 04:50 PM PST     Sunset
Fri -- 08:28 PM PST     6.32 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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3.32.31.61.42.23.75.677.77.56.96.153.82.61.71.62.64.15.56.26.25.75

Tide / Current Tables for Dumbarton Hwy Bridge, South San Francisco Bay, California Current
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Dumbarton Hwy Bridge
Click for Map
Fri -- 01:35 AM PST     Moonset
Fri -- 02:47 AM PST     0.00 knots Slack
Fri -- 06:04 AM PST     1.35 knots Max Flood
Fri -- 07:08 AM PST     Sunrise
Fri -- 08:58 AM PST     -0.00 knots Slack
Fri -- 12:15 PM PST     -0.87 knots Max Ebb
Fri -- 02:02 PM PST     Moonrise
Fri -- 03:46 PM PST     0.01 knots Slack
Fri -- 04:50 PM PST     Sunset
Fri -- 06:44 PM PST     1.08 knots Max Flood
Fri -- 09:21 PM PST     -0.00 knots Slack
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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-0.7-0.6-0.30.10.81.21.41.20.8-0-0.4-0.7-0.9-0.8-0.7-0.30.20.711.10.90.3-0.2-0.6

Weather Map
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wmap_P
GEOS Local Image of CentralWestCoast    EDIT
NOTE: East coast views moved to GEOS-16. They are experimental and not well supported by NOAA so they may not be correct so be warned. This change required redoing a large amount of the GOES code. If the image you are expecting is not showing, please let me know. You may need to use the EDIT function to update your location.
Link to Loop

Other links: Northern Pacific     Contential US     Full GOES-East
Wind Forecast for San Francisco/Monterey Bay Area, CA (0,6,7,8)
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Ground Weather Radar Station San Francisco Bay Area, CA
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