Tuesday, January28, 2020
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Marine Weather and Tides
Belvedere, CA

Version 3.4
NOTICE
12/16/2019 NOAA is having trouble with requests that include wind gusts. I am posting graphs without wind gusts until it gets fixed.
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.

Sunrise 7:15AMSunset 5:29PM Tuesday January 28, 2020 2:25 AM PST (10:25 UTC) Moonrise 9:41AMMoonset 9:15PM Illumination 12% Phase: Waxing Crescent; Moon at 3 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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PZZ530 San Pablo Bay, Suisun Bay, The West Delta And The San Francisco Bay North Of The Bay Bridge- 910 Pm Pst Mon Jan 27 2020
Tonight..W winds 5 to 10 kt. A slight chance of showers after midnight.
Tue..S winds 5 to 10 kt. A slight chance of showers.
Tue night..NW winds 5 to 15 kt.
Wed..NW winds up to 10 kt.
Wed night..NW winds 5 to 15 kt.
Thu..SW winds up to 10 kt.
Thu night..NW winds around 5 kt.
Fri..N winds around 5 kt.
Sat..N winds around 5 kt.
PZZ500 910 Pm Pst Mon Jan 27 2020
Synopsis for the central california coast and bays including the Monterey bay..Greater farallones...and cordell bank national marine sanctuaries... A cool front will move over the coastal waters and bays Tuesday with light showers. Northerly winds will develop and increase over the coastal waters Tuesday night into Wednesday steepening wind waves combining with northwest swell creating hazardous conditions for small craft. A long period northwest swell will arrive later this week.


7 Day Forecast for Marine Location Near Belvedere, CA
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location: 37.83, -122.44     debug


Area Discussion for - San Francisco/Monterey Bay Area, CA
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FXUS66 KMTR 280703 AFDMTR

Area Forecast Discussion National Weather Service San Francisco Bay Area 1103 PM PST Mon Jan 27 2020

SYNOPSIS. Light showers are possible over the North Bay late tonight into Tuesday, and possibly a bit farther south. Dry conditions are then forecast regionwide over the remainder of the week as high pressure builds over California. Expect a warming trend from Wednesday through Saturday. Cooling will develop by Sunday.

DISCUSSION. As of 8:50 PM PST Monday . Evening IR satellite imagery shows a system pressing inland across coastal sections of the Pacific Northwest, with a trailing cold front approaching the northern California coast. Latest models indicate that light rain will reach the North Bay by late tonight (NAM), but perhaps not until around sunrise Tuesday (HRRR). Best rain chances are in the North Bay tomorrow morning, although a few light showers may develop as far south as San Mateo County by late morning. Wet roadways are a definite possibility in the North Bay during the morning commute, and perhaps as far south as San Francisco and San Mateo County by mid morning. All other areas should experience dry conditions during the morning commute. Isolated light showers may linger into the afternoon, otherwise dry conditions will round out the day.

For the remainder of the week, look for dry conditions regionwide along with a warming trend as an upper ridge builds strongly over California. H5 heights are forecast to climb as high as 587 dm by the end of the week, while 850 mb temperatures warm to about 15 degrees C. These developments will result in high temperatures that are 5 to 10 degrees warmer than average by Friday and Saturday.

From Previous Discussion . Looking out into the longer term, the CPC 6-10 day and 8-14 day outlooks show below normal precipitation for California. Additionally, the longer range GFS shows dry conditions across much of the region through early February. Ensemble QPF for both the GFS and the ECMWF show mainly dry conditions as well through at least the first week of February with only some occasional minor accumulations here and there. Overall, dry weather looks to persist across the region heading into next month.

AVIATION. as of 11:03 PM PST Monday . Cloud ceiling forecasts remain difficult for the overnight due to a transition from a weak warm front to mainly a weak cool front Tuesday. Outgoing night-time radiative cooling of the boundary layer will be slower tonight due to incoming mid to high level clouds from the northwest, however it's off to a solid start of low cloud development over the Salinas Valley to Monterey Bay. Tuesday's cool front spreads light showers from north to south during the day.

Vicinity of KSFO . VFR holding longer through the evening as sufficient drying continues to move in from the west. Lowering ceiling forecast Tuesday with cool front and light showers.

SFO Bridge Approach . Similar to KSFO.

Monterey Bay Terminals . IFR-MVFR cloud ceilings tonight and Tuesday morning, MVFR Tuesday. Isolated showers arriving Tuesday, mainly in the afternoon.

MARINE. as of 10:50 PM PST Monday . A cool front will move over the coastal waters and bays Tuesday with light showers. Northerly winds will develop and increase over the coastal waters Tuesday night into Wednesday steepening wind waves combining with northwest swell creating hazardous conditions for small craft. A long period northwest swell will arrive later this week.

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



PUBLIC FORECAST: Dykema/AS AVIATION/MARINE: Canepa

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Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
FTPC1 - 9414290 - San Francisco, CA 2 mi61 min 53°F 54°F1028.7 hPa
PXSC1 3 mi55 min 55°F 55°F
PXOC1 - 9414311 - San Francisco (Pier 1), CA 3 mi55 min 54°F 1027.4 hPa
TIBC1 - Tiburon Pier, San Francisco Bay, CA 4 mi44 min SSW 5.1 53°F 1028 hPa
OKXC1 - 9414776 - Oakland (Berth 34), CA 6 mi55 min 53°F 1028.6 hPa
OMHC1 - 9414769 - Oakland Middle Harbor Met, CA 6 mi73 min WSW 2.9 G 5.1
OBXC1 6 mi55 min 54°F 54°F
RCMC1 - 9414863 - Richmond, CA 7 mi55 min 53°F
PPXC1 - 9414847 - Richmond (Point Potrero), CA 7 mi55 min 54°F 1028.7 hPa
AAMC1 - 9414750 - Alameda, CA 8 mi55 min 54°F
LNDC1 9 mi55 min 52°F 1028.5 hPa
46237 - San Francisco Bar, CA (142) 11 mi55 min 53°F9 ft
DPXC1 - 9415141 - Davis Point, San Pablo Bay, CA 18 mi55 min 51°F 1028 hPa
MZXC1 - 9415102 - Martinez-Amorco CA 22 mi55 min 52°F 52°F1028.2 hPa
46026 - SAN FRANCISCO - 18NM West of San Francisco, CA 22 mi35 min WSW 3.9 G 7.8 55°F 54°F9 ft1028.9 hPa
UPBC1 22 mi67 min W 5.1 G 7
RTYC1 - 9414523 - Redwood City, CA 25 mi55 min 50°F 56°F1029.2 hPa
PCOC1 - 9415144 - Port Chicago, CA 26 mi55 min 51°F 51°F1028 hPa
PRYC1 - 9415020 - Point Reyes, CA 31 mi55 min 54°F1028 hPa
PSBC1 - 9415115 - Pittsburg (Suisun Bay), CA 33 mi55 min 53°F 1028.1 hPa
SFXC1 - San Francisco Bay Reserve, CA 34 mi100 min WSW 6
46012 - HALF MOON BAY - 24NM South Southwest of San Francisco, CA 40 mi35 min W 5.8 G 9.7 55°F 55°F10 ft1029.1 hPa52°F

Wind History for San Francisco, CA
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Oakland, Metro Oakland International Airport, CA15 mi32 minESE 410.00 miOvercast53°F48°F86%1028.8 hPa
San Francisco, San Francisco International Airport, CA15 mi89 minNW 410.00 miMostly Cloudy53°F46°F80%1028.5 hPa
Hayward, Hayward Air Terminal, CA21 mi31 minN 010.00 miOvercast50°F46°F89%1029.6 hPa
Half Moon Bay Airport, CA22 mi30 minN 010.00 miOvercast48°F46°F94%1029.1 hPa
Concord, Buchanan Field, CA23 mi32 minSSE 510.00 miOvercast51°F46°F86%1026.9 hPa
San Carlos Airport, CA23 mi30 minSE 410.00 miOvercast50°F46°F88%1029.1 hPa
Novato / Gnoss Field, CA23 mi50 minN 010.00 miOvercast50°F50°F100%1028.4 hPa

Link to 5 minute data for KSFO

Wind History from SFO (wind in knots)
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Last 24hrS3SE4CalmSE3CalmCalmE3E4E4W8W9W85W11--W12W7W8W7S4CalmSE4NW4Calm
1 day agoW9CalmSW3W8SW11W8W10W10W10W11W14W14W11W11W12W12W15W19W16W16W16W14CalmCalm
2 days agoSE3SE4SE4CalmW5NE5SE6E4E3NE5NE6NE3CalmW7NW5W9SW8W4W4E3E3E5S6SE5

Tide / Current Tables for Alcatraz Island, San Francisco Bay, California
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Alcatraz Island
Click for Map
Tue -- 02:33 AM PST     5.04 feet High Tide
Tue -- 07:17 AM PST     Sunrise
Tue -- 07:46 AM PST     2.65 feet Low Tide
Tue -- 09:40 AM PST     Moonrise
Tue -- 01:28 PM PST     5.29 feet High Tide
Tue -- 05:28 PM PST     Sunset
Tue -- 08:03 PM PST     0.37 feet Low Tide
Tue -- 09:15 PM PST     Moonset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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3.64.5554.63.93.22.82.72.93.54.24.85.25.24.73.82.61.50.70.40.61.32.2

Tide / Current Tables for Alcatraz Island W, San Francisco Bay, California Current
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Alcatraz Island W
Click for Map
Tue -- 12:12 AM PST     2.53 knots Max Flood
Tue -- 03:50 AM PST     -0.00 knots Slack
Tue -- 06:05 AM PST     -1.41 knots Max Ebb
Tue -- 07:17 AM PST     Sunrise
Tue -- 09:14 AM PST     0.00 knots Slack
Tue -- 09:40 AM PST     Moonrise
Tue -- 12:02 PM PST     1.73 knots Max Flood
Tue -- 03:07 PM PST     -0.00 knots Slack
Tue -- 05:28 PM PST     Sunset
Tue -- 06:13 PM PST     -2.24 knots Max Ebb
Tue -- 09:15 PM PST     Moonset
Tue -- 09:46 PM PST     0.01 knots Slack
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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2.52.41.91-0.2-1-1.4-1.2-0.7-0.20.71.41.71.510.1-0.8-1.7-2.2-2-1.4-0.70.31.4

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 (5,6,7,8)
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Ground Weather Radar Station San Francisco Bay Area, CA
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