Sunday, January19, 2020
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Marine Weather and Tides
Oakland, 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 7:20AMSunset 5:19PM Sunday January 19, 2020 4:40 PM PST (00:40 UTC) Moonrise 2:31AMMoonset 1:10PM Illumination 27% Phase: Waning Crescent; Moon at 24 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- 305 Pm Pst Sun Jan 19 2020
Tonight..N winds around 5 kt.
Martin luther king jr day..SW winds up to 10 kt.
Mon night..S winds 5 to 15 kt. Rain likely.
Tue..S winds 10 to 20 kt with gusts up to 25 kt. Rain likely.
Tue night..NW winds up to 10 kt. A chance of rain.
Wed..N winds around 5 kt.
Wed night..NW winds around 5 kt.
Thu..N winds around 5 kt.
Fri..W winds around 5 kt.
PZZ500 305 Pm Pst Sun Jan 19 2020
Synopsis for the central california coast and bays including the Monterey bay..Greater farallones...and cordell bank national marine sanctuaries... Generally light offshore winds will persist across the coastal waters tonight as high pressure remains over the great basin. Winds will increase and turn southerly on Monday ahead of an approaching frontal system that will move through the waters on Tuesday. A long period, building northwest swell will arrive midweek generating hazardous seas conditions for small vessels.


7 Day Forecast for Marine Location Near Oakland, CA
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location: 37.78, -122.25     debug


Area Discussion for - San Francisco/Monterey Bay Area, CA
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FXUS66 KMTR 200012 AFDMTR

Area Forecast Discussion National Weather Service San Francisco Bay Area 412 PM PST Sun Jan 19 2020

SYNOPSIS. Seasonably cool and cloudy conditions will persist over the region on Monday with a slight chance of light rain developing near the coast. Rain chances increase region-wide on Tuesday as a weak frontal system drops southward. Mostly dry conditions are then expected for the remainder of next week, with rain possibly returning next weekend.

DISCUSSION. as of 01:45 PM PST Sunday . High clouds over the entire region and low clouds that have advected into the interior portion of the East Bay have held temperatures down this afternoon, especially in the latter. Meanwhile, a few locations are actually warmer than 24 hours ago as the air mass aloft has warmed slightly. Regardless, still a cool day region-wide with most locations in the upper 40s to middle 50s with only a few additional hours of warming potential. A few locations have reached into the lower 60s where the sun was able to break out for a bit longer along with the aid of light offshore flow.

Light onshore flow is forecast to return region-wide on Monday ahead of an approaching mid/upper level trough. This will increase low level clouds with continued mid/high level clouds still streaming inland as well. A weak disturbance continues to be forecast to approach central California on Monday, ahead of the main system. The ECMWF and other forecast models continue to depict light precipitation developing along the coast and around the Monterey Bay region as early as Monday afternoon/evening, yet rainfall will generally be light. Rain chances will increase from north to south on Tuesday as a frontal system pushes inland and to the south. Precipitation chances and rainfall amounts will be best over the North Bay and taper off southward over the Central Coast as the system dissipates. Overall, looking for 0.25" to 0.50" north of the Golden Gate, 0.10" to 0.25" around San Francisco and in the Coastal ranges while 0.10" or less is likely inland and to the south. Conditions will begin to dry out by Tuesday night as the system exits the region.

Mainly dry weather and seasonably cool temperatures will persist through the remainder of the forecast period. Meanwhile, weak systems will pass inland to the north with very light precipitation possible as far south Napa and Sonoma Counties from Thursday night into Friday, yet widespread precipitation appears unlikely at this time. Unsettled conditions then appear possible region-wide by next weekend in response to another mid/upper level trough approaching from the west.

AVIATION. as of 4:12 PM PST Sunday . For 00z TAFs. Extensive cloud cover over the east Pacific is overlapping CA/NV to British Columbia. In our cwa, very light precipitation as snow is evaporating (virga) at 12 to 16 thousand feet agl (air temps 20s/teens) above a lower level temperature inversion. Cloud thickness is obscuring the areal coverage of low clouds over the Central Valley, part of which is entering the East Bay, Byron Airport reports 4 miles visibility in mist and overcast 800 feet. All other airports report VFR except KHAF reports MVFR 3-5 miles visibility in haze.

The synoptic pattern favors a continuation of mainly weak surface based offshore pressure gradient and winds, combined with a lack of ocean/land temperature contrasts negates a maritime influence (sea breezes) through tonight and Monday morning. However, by Monday afternoon light onshore winds could develop locally on the coast. VFR is forecast, lowest confidence is in areal coverage of fog and/or low clouds in the East Bay valleys tonight and Monday morning.

Vicinity of KSFO . VFR. Light N-NE wind tonight becoming SW Monday.

SFO Bridge Approach . Similar to KSFO.

Monterey Bay Terminals . VFR. Light E-SE winds except up to 10 knots in the Salinas Valley, winds onshore 5 to 10 knots Monday afternoon.

MARINE. as of 3:24 PM PST Sunday . Generally light offshore winds will persist across the coastal waters tonight as high pressure remains over the Great Basin. Winds will increase and turn southerly on Monday ahead of an approaching frontal system that will move through the waters on Tuesday. A long period, building northwest swell will arrive midweek generating hazardous seas conditions for small vessels.

MTR WATCHES/WARNINGS/ADVISORIES. Tngt. NONE.



PUBLIC FORECAST: RGass AVIATION: Canepa MARINE: RGass

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Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
LNDC1 2 mi53 min 1018.2 hPa
AAMC1 - 9414750 - Alameda, CA 3 mi53 min 52°F
OMHC1 - 9414769 - Oakland Middle Harbor Met, CA 4 mi119 min S 4.1 G 5.1
OBXC1 5 mi59 min 52°F 46°F
OKXC1 - 9414776 - Oakland (Berth 34), CA 5 mi53 min 1018.3 hPa
PXSC1 8 mi53 min 51°F 46°F
PXOC1 - 9414311 - San Francisco (Pier 1), CA 8 mi53 min 49°F 1017.5 hPa
PPXC1 - 9414847 - Richmond (Point Potrero), CA 11 mi59 min 53°F 1018.4 hPa
FTPC1 - 9414290 - San Francisco, CA 12 mi59 min 49°F 53°F1018.3 hPa
TIBC1 - Tiburon Pier, San Francisco Bay, CA 13 mi66 min NNW 12 47°F 1019 hPa
RCMC1 - 9414863 - Richmond, CA 13 mi53 min 52°F
UPBC1 19 mi119 min E 12 G 16
DPXC1 - 9415141 - Davis Point, San Pablo Bay, CA 19 mi53 min 44°F 1018.5 hPa
MZXC1 - 9415102 - Martinez-Amorco CA 19 mi59 min 44°F 50°F1019.9 hPa
RTYC1 - 9414523 - Redwood City, CA 19 mi53 min 1018.6 hPa
46237 - San Francisco Bar, CA (142) 20 mi41 min 53°F9 ft
PCOC1 - 9415144 - Port Chicago, CA 22 mi53 min 49°F1019.5 hPa
PSBC1 - 9415115 - Pittsburg (Suisun Bay), CA 26 mi59 min 43°F 1020.1 hPa
SFXC1 - San Francisco Bay Reserve, CA 31 mi116 min ESE 7
46026 - SAN FRANCISCO - 18NM West of San Francisco, CA 31 mi31 min E 18 G 25 53°F 54°F1017.2 hPa
PRYC1 - 9415020 - Point Reyes, CA 41 mi59 min 53°F1016.7 hPa
46012 - HALF MOON BAY - 24NM South Southwest of San Francisco, CA 44 mi31 min NNE 5.8 G 9.7 55°F 55°F1016.9 hPa49°F

Wind History for Alameda, CA
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Oakland, Metro Oakland International Airport, CA6 mi48 minWSW 310.00 miOvercast52°F42°F69%1018.9 hPa
Hayward, Hayward Air Terminal, CA11 mi47 minNNE 910.00 miFair53°F37°F57%1019.1 hPa
San Francisco, San Francisco International Airport, CA12 mi45 minNNE 410.00 miOvercast52°F43°F72%1018.3 hPa
Concord, Buchanan Field, CA17 mi48 minNE 67.00 miMostly Cloudy45°F39°F83%1018.3 hPa
San Carlos Airport, CA17 mi50 minN 010.00 miMostly Cloudy52°F41°F67%1018.6 hPa
Palo Alto Airport, CA22 mi54 minENE 710.00 miOvercast52°F42°F72%1018.3 hPa
Livermore, Livermore Municipal Airport, CA23 mi48 minENE 96.00 miFog/Mist44°F39°F85%1018.9 hPa
Half Moon Bay Airport, CA23 mi46 minN 04.00 miFair with Haze55°F46°F72%1017.3 hPa

Link to 5 minute data for KOAK

Wind History from OAK (wind in knots)
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Last 24hrNE11E7NE6E4E8SE6E6E7E9E7E6E7E5E6E8SE7SE7SE8SE8SE7S7SW6W3SW3
1 day agoNW6N4E6E7NE5E5E5E7NE5E6E4E3E6E7E5E3E6E6E8S6SW5W6NE8NE9
2 days agoW8SW11
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S5SE4E4SE8SE8SE8SE6SE6SE5SE9E5NE4E3E4CalmCalm3W7W4W5W3W8

Tide / Current Tables for Oakland Harbor, Park Street Bridge, San Francisco Bay, California
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Oakland Harbor
Click for Map
Sun -- 12:42 AM PST     2.07 feet Low Tide
Sun -- 02:30 AM PST     Moonrise
Sun -- 07:21 AM PST     Sunrise
Sun -- 07:23 AM PST     6.96 feet High Tide
Sun -- 01:10 PM PST     Moonset
Sun -- 02:24 PM PST     0.22 feet Low Tide
Sun -- 05:17 PM PST     Sunset
Sun -- 09:11 PM PST     4.82 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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2.22.12.53.34.35.46.46.96.86.14.93.31.80.80.30.30.81.72.73.74.54.84.64

Tide / Current Tables for Oakland Harbor High Street Bridge, San Francisco Bay, California Current
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Oakland Harbor High Street Bridge
Click for Map
Sun -- 01:06 AM PST     0.00 knots Slack
Sun -- 02:30 AM PST     Moonrise
Sun -- 03:52 AM PST     1.41 knots Max Flood
Sun -- 07:00 AM PST     -0.00 knots Slack
Sun -- 07:21 AM PST     Sunrise
Sun -- 09:57 AM PST     -1.71 knots Max Ebb
Sun -- 01:10 PM PST     Moonset
Sun -- 02:24 PM PST     0.01 knots Slack
Sun -- 05:14 PM PST     1.61 knots Max Flood
Sun -- 05:17 PM PST     Sunset
Sun -- 08:29 PM PST     -0.00 knots Slack
Sun -- 10:31 PM PST     -0.80 knots Max Ebb
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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-0.4-0.10.71.21.41.20.80-0.9-1.5-1.7-1.6-1.3-0.9-0.30.61.31.61.51.10.4-0.4-0.8-0.8

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 (19,4,5,8)
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Ground Weather Radar Station San Francisco Bay Area, 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.