Thursday, January23, 2020
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Marine Weather and Tides
Bay Point, 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 7:17AMSunset 5:21PM Thursday January 23, 2020 12:30 PM PST (20:30 UTC) Moonrise 6:35AMMoonset 4:20PM Illumination 2% Phase: Waning Crescent; Moon at 28 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- 832 Am Pst Thu Jan 23 2020
Today..NE winds up to 10 kt.
Tonight..N winds up to 10 kt. Patchy fog.
Fri..SW winds up to 10 kt. Patchy fog.
Fri night..W winds up to 10 kt.
Sat..SE winds around 5 kt. A chance of rain.
Sat night..S winds 5 to 10 kt. Rain likely.
Sun..W winds 5 to 10 kt.
Mon..W winds up to 10 kt.
PZZ500 832 Am Pst Thu Jan 23 2020
Synopsis for the central california coast and bays including the Monterey bay..Greater farallones...and cordell bank national marine sanctuaries... Winds will generally be offshore and locally breezy near coastal gaps this afternoon. A long period wnw swell will begin to move into the waters later today, peaking on Friday and Saturday. A coastal jet with northerly winds will develop along the big sur coast by Friday afternoon, generating small craft advisory winds there. The next storm approaches later Saturday into Sunday with increasing southerly winds followed by another large northwest swell behind the front Sunday into Monday.


7 Day Forecast for Marine Location Near Bay Point, CA
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location: 38.04, -121.94     debug


Area Discussion for - Sacramento, CA
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FXUS66 KSTO 231622 AFDSTO

Area Forecast Discussion National Weather Service Sacramento CA 820 AM PST Thu Jan 23 2020

Synopsis. Night and morning valley fog will be possible into Saturday. Some light precipitation possible, mainly over the mountains and northern portions of the Sacramento Valley, into Friday. Wetter Pacific storm moves through this weekend. Unsettled weather continues early next week.

Discussion. The Morning Update: Just a quick update this morning to make a few changes to the zones/grids. Dense fog quite patchy this morning and apparently short-lived where it does occur. Thicker WAA mid clouds have limited the radiational cooling so widespread F+ has not materialized. Mid level WAA may leak out some light rain/sprinkles this afternoon as isentropic charts lower the condensation pressure deficits to just a couple of mbs and weak orographics come into play. Best chance of precip this afternoon expected over the Sierra and Nrn mtn areas. JHM

Previous Discussion.

Upper level ridge axis moving through attm, will shift into the Great Basin today as upstream Pacific frontal system approaches. With less high level cloudiness overnight, potential for more widespread valley fog increases this morning. Already seeing some patchy dense fog beginning to develop within larger areas of lighter fog in the Sacramento and Northern San Joaquin Valleys. HREF showing increasing probability of visibilities below 3SM from KOVE southward early this morning, so will continue to monitor for more widespread dense fog development. Visibilities expected to improve by mid to late morning as boundary layer mixing increases with approaching short wave trough. Models spread some associated light precip into the mountains and possibly northern and central portions of the Sacramento Valley this afternoon. Highs today expected to be several degrees cooler than Wednesday.

Secondary trough follows through northern half of the CWA tonight into Friday keeping a threat of light precipitation. Overall precip amounts expected to be mostly below a tenth in the Central Valley through Friday, with around a quarter to third of an inch possible in portions of the Shasta and Western Plumas mountains. Snow levels will initially be above 7000 ft this afternoon through early Friday, then lower to around 5500 to 6500 feet Friday afternoon into evening. No significant mountain travel impacts expected during this period.

Upper ridging strengthens over Norcal Friday night into early Saturday, with some night and morning dense valley fog possible. Stronger Pacific frontal system approaches Saturday and looks to begin spreading precipitation into our Coastal Range by the afternoon. Baroclinic zone moves through Saturday night into Sunday morning with some moderate precipitation associated with it. Secondary wave keeps a threat of post-frontal showers over interior NorCal Sunday into Monday. Storm total QPF for the weekend system looks to range from a few tenths in the Northern San Joaquin Valley to upwards of an inch in the Northern Sacramento Valley. Up to around 2 inches of liquid precip possible in wetter portions of the foothills and mountains. Snow levels forecast to generally be above 7k feet ahead of the front on Saturday, lowering to around 5 to 6k feet Sunday and 4500 to 5500 feet Sunday night into Monday. Light to moderate snow amounts are expected with 6 to 12 inches possible at pass levels in the Sierra Nevada.

PCH

EXTENDED DISCUSSION (Monday THROUGH Thursday). After the weekend system we will see the storm track shift to the north over the PacNW. They will see multiple waves of precip throughout the period. The majority of the precip will stay to our north but some light mountain showers are going to be possible especially out a head of any incoming waves. Right now there isn't great agreement between ensembles on when the waves will move through the PacNW. That leaves uncertainty on when we will see the best chances for showers. Either way everything looks light and low impact for us. Towards the end of the week we will see more ridging and that will continue to push the storm track to the north and lessen the shower chances for mountain locations. Temperatures will be near average for much of the period but will warm to just above average by late in the week.

-CJM

AVIATION. IFR/LIFR conditions are expected this morning from KMYV south to KMOD due to areas of dense fog with vis down to 1/4SM at times. VIS improve by 18z with VFR conditions returning. Light showers are possible after 20z mainly north of I-80 and over the higher elevations. MVFR conditions expected for the northern terminals due to low CIGs after 21z. MVFR conditions in any showers also.

STO WATCHES/WARNINGS/ADVISORIES.

None.




Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
PSBC1 - 9415115 - Pittsburg (Suisun Bay), CA 3 mi43 min 1024.1 hPa
PCOC1 - 9415144 - Port Chicago, CA 5 mi43 min 50°F1024 hPa
MZXC1 - 9415102 - Martinez-Amorco CA 10 mi43 min 51°F1024.3 hPa
UPBC1 10 mi73 min ENE 7 G 8
SFXC1 - San Francisco Bay Reserve, CA 12 mi46 min E 8
DPXC1 - 9415141 - Davis Point, San Pablo Bay, CA 17 mi49 min 53°F 1023.9 hPa
PPXC1 - 9414847 - Richmond (Point Potrero), CA 24 mi49 min 57°F 1024.1 hPa
LNDC1 25 mi43 min 55°F 1023.6 hPa
OKXC1 - 9414776 - Oakland (Berth 34), CA 26 mi55 min 53°F 1024 hPa
OMHC1 - 9414769 - Oakland Middle Harbor Met, CA 26 mi79 min SW 4.1 G 4.1
RCMC1 - 9414863 - Richmond, CA 26 mi49 min 54°F 53°F1023.4 hPa
OBXC1 27 mi43 min 54°F 52°F
AAMC1 - 9414750 - Alameda, CA 27 mi49 min 53°F 52°F1023.9 hPa
PXOC1 - 9414311 - San Francisco (Pier 1), CA 29 mi49 min 54°F 1022.8 hPa
PXSC1 29 mi49 min 55°F 52°F
TIBC1 - Tiburon Pier, San Francisco Bay, CA 29 mi26 min NW 8 53°F 1024 hPa
FTPC1 - 9414290 - San Francisco, CA 32 mi49 min 54°F 53°F1023.8 hPa
RTYC1 - 9414523 - Redwood City, CA 40 mi43 min 56°F 53°F1024.1 hPa
46237 - San Francisco Bar, CA (142) 41 mi31 min 53°F5 ft

Wind History for Port Chicago, CA
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Concord, Buchanan Field, CA7 mi38 minVar 410.00 miFair57°F48°F72%1022.7 hPa
Fairfield / Travis Air Force Base, CA17 mi93 minN 810.00 miPartly Cloudy53°F48°F85%1025.4 hPa
Napa, Napa County Airport, CA22 mi37 minVar 610.00 miFair55°F46°F74%1023.2 hPa
Vacaville Nut Tree Airport, CA23 mi38 minNNE 710.00 miFair58°F46°F67%1024.3 hPa
Livermore, Livermore Municipal Airport, CA24 mi38 minNE 810.00 miFair56°F48°F77%1023.3 hPa

Link to 5 minute data for KCCR

Wind History from CCR (wind in knots)
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Last 24hrN4N4N6--NE4NE3E3CalmCalmCalmCalmS3CalmCalmCalmE3CalmCalmCalmSW3NE4NE4NE64
1 day agoS7S12S12S11S9S10S10S8SW10SW9S8S4SE3SW4SE5CalmCalmCalmCalmCalmS3NW6N3N3
2 days agoCalmCalmN3NW3CalmCalmN3CalmS3CalmCalmCalmCalmCalmS3SE5SE3CalmNE3CalmN3N6SW3S10

Tide / Current Tables for Mallard Island Ferry Wharf, Suisun Bay, California
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Mallard Island Ferry Wharf
Click for Map
Thu -- 02:28 AM PST     3.61 feet High Tide
Thu -- 06:35 AM PST     Moonrise
Thu -- 07:18 AM PST     Sunrise
Thu -- 07:35 AM PST     1.77 feet Low Tide
Thu -- 01:13 PM PST     4.54 feet High Tide
Thu -- 04:20 PM PST     Moonset
Thu -- 05:20 PM PST     Sunset
Thu -- 09:04 PM PST     -0.31 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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2.23.13.63.53.22.62.11.81.82.22.93.74.34.54.43.93.22.31.40.6-0-0.3-0.10.6

Tide / Current Tables for Stake Point .9 Mi NNW, Suisun Bay, California Current
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Stake Point .9 Mi NNW
Click for Map
Thu -- 01:04 AM PST     0.82 knots Max Flood
Thu -- 03:57 AM PST     -0.00 knots Slack
Thu -- 06:03 AM PST     -0.34 knots Max Ebb
Thu -- 06:35 AM PST     Moonrise
Thu -- 07:19 AM PST     Sunrise
Thu -- 07:50 AM PST     0.00 knots Slack
Thu -- 11:24 AM PST     0.87 knots Max Flood
Thu -- 02:21 PM PST     -0.00 knots Slack
Thu -- 04:20 PM PST     Moonset
Thu -- 05:20 PM PST     Sunset
Thu -- 06:35 PM PST     -0.93 knots Max Ebb
Thu -- 10:01 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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0.70.80.70.4-0-0.2-0.3-0.20.10.40.70.90.80.60.2-0.2-0.6-0.8-0.9-0.9-0.8-0.4-00.3

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 Sacramento, CA (15,3,4,5)
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Ground Weather Radar Station Sacramento, CA
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The information on this web site has not been checked for accuracy. It is for entertainment purposes only and should be independently verified before using for any other reason. There are five sources. 1) Documents and manuals from a variety of sources. These have not been checked for accuracy and in many cases have not even been read by anyone associated with L-36.com. I have no idea of they are useful or accurate, I leave that to the reader. 2) Articles others have written and submitted. If you have questions on these, please contact the author. 3) Articles that represent my personal opinions. These are intended to promote thought and for entertainment. These are not intended to be fact, they are my opinions. 4) Small programs that generate result presented on a web page. Like any computer program, these may and in some cases do have errors. Almost all of these also make simplifying assumptions so they are not totally accurate even if there are no errors. Please verify all results. 5) Weather information is from numerous of sources and is presented automatically. It is not checked for accuracy either by anyone at L-36.com or by the source which is typically the US Government. See the NOAA web site for their disclaimer. Finally, tide and current data on this site is from 2007 and 2008 data bases, which may contain even older data. Changes in harbors due to building or dredging change tides and currents and for that reason many of the locations presented are no longer supported by newer data bases. For example, there is very little tidal current data in newer data bases so current data is likely wrong to some extent. This data is NOT FOR NAVIGATION. See the XTide disclaimer for details. In addition, tide and current are influenced by storms, river flow, and other factors beyond the ability of any predictive program.