Monday, February17, 2020
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Marine Weather and Tides
Black Point-Green 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 6:56AMSunset 5:51PM Monday February 17, 2020 4:46 AM PST (12:46 UTC) Moonrise 2:37AMMoonset 12:34PM Illumination 37% Phase: Third Quarter Moon; Moon at 23 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- 239 Am Pst Mon Feb 17 2020
Today..N winds 5 to 15 kt.
Tonight..NE winds up to 10 kt.
Tue..NE winds around 5 kt.
Tue night..W winds up to 10 kt.
Wed..NW winds around 5 kt.
Wed night..NW winds up to 10 kt.
Thu..N winds around 5 kt.
Fri..NW winds up to 10 kt.
PZZ500 239 Am Pst Mon Feb 17 2020
Synopsis for the central california coast and bays including the Monterey bay..Greater farallones...and cordell bank national marine sanctuaries... Light to moderate north to northwest winds will persist over the coastal waters during the day on Monday. Areas of gusty winds and wave heights greater than 10 feet will create hazardous seas for small crafts over parts of the waters. A series of northwest swells will continue through the forecast period.


7 Day Forecast for Marine Location Near Black Point-Green Point, CA
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location: 38.11, -122.5     debug


Area Discussion for - San Francisco/Monterey Bay Area, CA
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FXUS66 KMTR 171131 AFDMTR

Area Forecast Discussion National Weather Service San Francisco Bay Area 331 AM PST Mon Feb 17 2020

SYNOPSIS. Offshore flow will develop over the region today brining slightly warmer afternoon temperatures and cooler overnight conditions. Overall, expect dry and mild conditions to persist through the week with only slight chances of light precipitation late in the week and into the upcoming weekend.

DISCUSSION. as of 02:58 AM PST Monday . Moist onshore flow has resulted in more widespread stratus this morning developing along the coast and into the interior valleys. Patchy fog is even being reported across the interior valleys this morning with visibility falling to 1/4 mile at times. Meanwhile, high level clouds are also advecting inland across the region with surface temperatures generally in the middle 40s to lower 50s. While low clouds and/or fog may become a bit more widespread through sunrise, dying is likely to occur by midday as offshore flow develops inland. By this afternoon, breezy northerly winds are forecast to develop in the hills and higher elevations across the region. Gusts of 30 mph will be likely in the hills/ridges and up to 40 mph in the peaks while only isolated gusts are expected in the lower elevations. This pattern will also allow for slightly warmer temperatures region-wide this afternoon with middle 60s to lower 70s likely.

The weak offshore pattern is likely to continue into Tuesday as a ridge of high pressure persists offshore. This will result in another day of above average temperatures region-wide Tuesday afternoon. However, under clear sky conditions, overnight temperatures will trend cooler the next few nights with middle to upper 30s likely across the interior with lower 40s elsewhere.

Offshore flow will diminish by midweek, yet continued dry weather conditions along with temperatures above seasonal averages will persist through the remainder of the week. Forecast model guidance continues to indicate a mid/upper level cut-off low will approach central or southern California late in the week. While the NBM maintains dry conditions over our region, the operational GFS and ECMWF both indicate the potential for isolated showers over at least a portion of the region on Friday. Regardless, if any precipitation does occur, rainfall amounts will be very light and likely isolated. Something worth monitoring at least in the coming days.

Ensemble members and the NBM indicate another chance of light precipitation over the region late in the upcoming weekend as a system drops in from the northwest. However, operational models continue to trend drier with this system as well as the system will have a limited moisture tap. Regardless, chances for widespread beneficial rainfall appear unlikely during the next 7 days.

AVIATION. as of 3:31 AM PST Monday . For 12Z TAFs. Challenging short-term forecast as high clouds remain overhead, preventing a clear satellite view of the stratus and fog behavior at the low- levels. The surface observations at many of the TAF sites have trended better over the last several hours with VFR conditions reported at SNS, OAK, SFO, and the Monterey Bay Area terminals at the TAF publication time. Stratus has maintained IFR ceilings at SJC and LIFR visibilities at LVK. Think there will be at least a brief period around sunrise with the potential for additional stratus development in/around SFO and OAK, but with offshore flow developing above the surface over the next several hours, this potential should be limited. Should see VFR conditions return to SJC and LVK as the boundary layer dries through the morning and into the afternoon. Non-convective low level wind shear will be possible at SJC, OAK, LVK, and STS for several hours this morning as a result of north to northeast winds at around 925 mb.

Vicinity of KSFO . VFR conditions have largely prevailed overnight as last evening's low clouds have retreated to the Pacific side of the San Mateo Coast. There is still a limited period this morning between now and sunrise with the potential low clouds, but the window of opportunity appears to be limited as drier air advects in from the north to northeast within a few hours of sunrise. Light winds this morning will eventually become onshore later today.

SFO Bridge Approach . Similar to KSFO.

Monterey Bay Terminals . Low clouds have mixed-out around the Monterey Peninsula over the last few hours with VFR conditions returning to MRY. Could see low clouds try to redevelop over the next several hours at MRY. Meanwhile at SNS, infrared satellite imagery shows valley stratus/fog developing in the Salinas Valley, already within the vicinity of SNS as of the 12Z TAF publication time. Expect to see stratus expand in the Salinas Valley over the next few hours.

MARINE. as of 02:58 AM PST Monday . Light to moderate north to northwest winds will persist over the coastal waters during the day on Monday. Areas of gusty winds and wave heights greater than 10 feet will create hazardous seas for small crafts over parts of the waters. A series of northwest swells will continue through the forecast period.

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



PUBLIC FORECAST: RGass AVIATION: Rowe MARINE: Rowe

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Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
DPXC1 - 9415141 - Davis Point, San Pablo Bay, CA 13 mi46 min SW 5.1 G 6 51°F 1019.6 hPa (-1.1)
RCMC1 - 9414863 - Richmond, CA 14 mi46 min Calm G 1.9 51°F 53°F1019.6 hPa (-1.1)
TIBC1 - Tiburon Pier, San Francisco Bay, CA 15 mi47 min Calm 49°F 1020 hPa
PPXC1 - 9414847 - Richmond (Point Potrero), CA 16 mi46 min NNW 1.9 G 2.9 52°F 1020.2 hPa (-1.2)
UPBC1 21 mi46 min WNW 5.1 G 7
FTPC1 - 9414290 - San Francisco, CA 21 mi52 min SSW 1.9 G 2.9 49°F 54°F1020.1 hPa
MZXC1 - 9415102 - Martinez-Amorco CA 21 mi46 min WSW 5.1 G 6 51°F 53°F1019.6 hPa (-1.2)
PXSC1 22 mi46 min 52°F 52°F
PXOC1 - 9414311 - San Francisco (Pier 1), CA 22 mi46 min E 1 G 1.9 51°F 1018.9 hPa (-1.2)
OKXC1 - 9414776 - Oakland (Berth 34), CA 22 mi46 min SSW 1 G 1.9 50°F 1020 hPa (-1.1)
OMHC1 - 9414769 - Oakland Middle Harbor Met, CA 23 mi46 min SSE 1.9 G 2.9
OBXC1 23 mi46 min 51°F 51°F
46237 - San Francisco Bar, CA (142) 24 mi46 min 52°F4 ft
PCOC1 - 9415144 - Port Chicago, CA 25 mi46 min S 8.9 G 11 48°F 53°F1019.3 hPa (-1.0)
LNDC1 25 mi46 min SE 1.9 G 2.9 50°F 1019.9 hPa (-1.1)
AAMC1 - 9414750 - Alameda, CA 26 mi46 min E 1.9 G 2.9 50°F 55°F1019.9 hPa (-1.2)
SFXC1 - San Francisco Bay Reserve, CA 26 mi61 min SSE 4.1
46026 - SAN FRANCISCO - 18NM West of San Francisco, CA 30 mi26 min NNW 5.8 G 9.7 50°F 53°F1020.5 hPa
PSBC1 - 9415115 - Pittsburg (Suisun Bay), CA 33 mi46 min W 6 G 8.9 55°F 1019 hPa (-1.1)
RTYC1 - 9414523 - Redwood City, CA 44 mi46 min Calm G 0 47°F 56°F1020.4 hPa (-1.0)
46013 - Bodega Bay - 48NM North Northwest of San Francisco, CA 44 mi26 min NNW 9.7 G 14 51°F1020.4 hPa

Wind History for Richmond, CA
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Novato / Gnoss Field, CA4 mi71 minN 010.00 mi43°F42°F100%1020.3 hPa
Petaluma Municipal Airport, CA12 mi66 minN 010.00 miFair41°F41°F100%1020.3 hPa
Napa, Napa County Airport, CA14 mi52 minSSE 30.50 miFog42°F41°F96%1018.9 hPa

Link to 5 minute data for KDVO

Wind History from DVO (wind in knots)
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Last 24hrCalmNW7Calm4NW105N11NW12NW6
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SW8E4E5NE3CalmE3CalmN53CalmCalmCalm
1 day agoNW3CalmCalmCalmN5CalmCalmCalmN7N7NW6NW4SW5CalmCalmNE6SE4E5E4SE4E4E3CalmSE6
2 days agoCalmCalmCalm3E534E4CalmS4S4CalmCalmN6N3CalmCalmCalmCalmS3CalmCalmCalmCalm

Tide / Current Tables for Petaluma River entrance, San Pablo Bay, California
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Petaluma River entrance
Click for Map
Mon -- 01:54 AM PST     2.38 feet Low Tide
Mon -- 02:37 AM PST     Moonrise
Mon -- 06:58 AM PST     Sunrise
Mon -- 07:31 AM PST     6.36 feet High Tide
Mon -- 12:33 PM PST     Moonset
Mon -- 03:30 PM PST     0.09 feet Low Tide
Mon -- 05:50 PM PST     Sunset
Mon -- 09:57 PM PST     4.60 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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2.92.52.42.73.54.65.66.26.35.953.82.51.40.50.10.20.71.52.63.64.34.64.4

Tide / Current Tables for Petaluma River Approach, San Pablo Bay, California Current
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Petaluma River Approach
Click for Map
Mon -- 01:23 AM PST     0.00 knots Slack
Mon -- 02:37 AM PST     Moonrise
Mon -- 04:05 AM PST     0.66 knots Max Flood
Mon -- 06:57 AM PST     Sunrise
Mon -- 07:55 AM PST     -0.00 knots Slack
Mon -- 12:01 PM PST     -0.83 knots Max Ebb
Mon -- 12:33 PM PST     Moonset
Mon -- 03:49 PM PST     0.00 knots Slack
Mon -- 05:50 PM PST     Sunset
Mon -- 06:36 PM PST     0.52 knots Max Flood
Mon -- 09:39 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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-0.3-0.10.20.50.70.60.50.3-0-0.4-0.6-0.8-0.8-0.8-0.6-0.20.10.30.50.50.40.2-0.1-0.3

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 San Francisco/Monterey Bay Area, CA (7,2,3,4)
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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.