Saturday, January25, 2020
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Marine Weather and Tides
Burlingame, 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 7:16AMSunset 5:26PM Saturday January 25, 2020 1:01 PM PST (21:01 UTC) Moonrise 8:05AMMoonset 6:20PM Illumination 1% Phase: New Moon; Moon at 1 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- 817 Am Pst Sat Jan 25 2020
Today..SW winds 5 to 15 kt. Showers likely this afternoon.
Tonight..SW winds 5 to 15 kt. Showers.
Sun..W winds 5 to 15 kt. A chance of showers.
Sun night..NW winds 5 to 15 kt.
Mon..W winds up to 10 kt.
Mon night..W winds 5 to 10 kt.
Tue..W winds up to 10 kt.
Wed..W winds up to 10 kt.
PZZ500 817 Am Pst Sat Jan 25 2020
Synopsis for the central california coast and bays including the Monterey bay..Greater farallones...and cordell bank national marine sanctuaries... Light split flow winds through the early afternoon, with increasing southerly winds in the northern waters and weakening northerly winds in the southern waters. Winds shift to become south to southwest across the waters by this evening ahead of a surface frontal boundary before shifting to become northerly by Sunday morning. A long period west to northwest swell will continue to impact the waters through Saturday. This will create conditions hazardous to small crafts. Additional long period northwest swells will arrive this weekend and early next week.


7 Day Forecast for Marine Location Near Burlingame, CA
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location: 37.61, -122.32     debug


Area Discussion for - San Francisco/Monterey Bay Area, CA
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FXUS66 KMTR 251817 AFDMTR

Area Forecast Discussion National Weather Service San Francisco Bay Area 1017 AM PST Sat Jan 25 2020

SYNOPSIS. Fog still lingers in isolated valleys this morning and has reduced visibility in Oakland, but otherwise increasing clouds through the day as a warm front approaches. The North Bay has a chance to see some light rain developing late this afternoon into this evening followed by a cold front passing through the Bay Area overnight with some light rain into early Sunday morning. Sunday into Monday sees a return to drier weather. The next weak front will move into the area by Tuesday bringing more light rain chances to the North Bay, but dry from the Golden Gate southward. Long range trends look seasonably warm and dry as high pressure builds.

DISCUSSION. as of 08:34 AM PST Saturday . Oakland Airport is reporting 1/4 mile visibility due to fog, and webcams are showing a low stratus cloud deck sitting over the city of San Francisco. Santa Rosa has improved slightly to 1 mile visibility, while Salinas remains stuck at 1/4 mile with fog. Winds remain light and variable over land, while coastal buoys are showing light southerly winds. The KMUX radar is showing light rain out over the coastal waters moving eastward toward the shore. A chance of spotty light rain is possible around the Bay Area, but the best chances are in the North Bay and west of coastal ranges. Rain is expected in the late afternoon and early evening ahead of a cold front moving through. Accumulations will be minimal, with higher elevations in northern portions of Sonoma county seeing the most, at around a quarter of an inch.

A cool and damp start to the day before drier conditions in the afternoon for Sunday. High pressure builds providing mild conditions and some patchy fog on Monday morning. Models are still showing the next weak system to come through on Tuesday, but again mainly focused on the North Bay. Longer range forecasts still show drier conditions for the region after Tuesday.

PREV DISCUSSION. as of 2:21 AM PST Saturday . Short term concern this morning will be areas of dense fog through sunrise. Salinas already down to 1/4 mile fog in the Salinas Valley with Santa Rosa at 3/4 mile in the North Bay. Dewpoints remain high in the upper 40s and lower 50s keeping the airmass pretty juicy. Synoptic pattern features a weak warm front approaching today. Buoys are reporting some light southerly winds with IR satellite showing increasing mid and high clouds this afternoon. This will eventually lead to some light rain across the North Bay late this afternoon and evening as warm front moves onshore. Light rain chances spread towards the Golden Gate this evening but rain remains light and spotty. Overnight a cold front will then pass over the region, keeping rain chances going in the North Bay with scattered light rain throughout the Bay Area overnight. Rain chances from San Jose southward to the Central Coast look slight with any amounts being very light around sunrise Sunday as the cold front passes through.

After a cool and damp start Sunday morning, by midday nice weather returns as high pressure builds with highs back into the mid 50s and lower 60s. Forecast for Monday is dry with near normal highs after valley fog in the morning.

Another weak front may skirt the North Bay to the Golden Gate Tuesday with some light rain chances.

Strong high pressure builds from midweek and beyond with plenty of sunshine and highs likely peaking in the mid 60s with even some 70s for the Central Coast. Current models keep mild and dry weather into next weekend with some hint of a colder (but dry) trough by around Feb 3rd.

AVIATION. as of 10:18 AM PST Saturday . For 18Z TAFs. Weak surface boundaries will interact with the region over the course of the TAF period, primarily impacting terminals by bringing periods of LIFR-MVFR cigs/visbys and brief VCSH/-SHRA while winds will be generally light (ie less than 10 kt). Fog is starting to dissipate but still affects TAFs around the SF Bay. Improvement is expected over the next couple of hours. Another round of poor overnight cigs/visbys will occur tonight with a slight chance of very light showers through the night.

Vicinity of KSFO . Expanding low clouds near KSFO at or around 300-500 feet, however, deck is not robust and shifting winds are pushing these clouds in and out of the vicinity of the terminal, so expect evolving conditions through the morning with reductions and visibility accompanying the low clouds. Improving conditions expected by very late morning to early afternoon, however, clouds could linger throughout the day (though not as thick as this morning). Low clouds and reduced visbys will then reform by the late afternoon to early evening with the next boundary. Highest chance of showers looks to be around 09-14Z tomorrow, though, they will be weak. Winds generally light SE ahead of air mass boundaries but could see it shift westerly during the afternoon.

SFO Bridge Approach . Similar to KSFO.

Monterey Bay Terminals . Very similar scenario as yesterday with VFR conditions around MRY. Meanwhile, a more robust fog bank develops throughout the Salinas valley (incl at KSNS) and into the Marina/Castroville area of the Monterey Bay. Clouds to dissipate by early afternoon except lingering FEW/SCT cloud decks in the 3000-5000 ft range as low to mid level moisture remains abundant. An earlier return of IFR or less cigs is possible by 00-02Z at the terminals ahead of the next boundary.

MARINE. as of 08:34 AM PST Saturday . Light split flow winds through the early afternoon, with increasing southerly winds in the northern waters and weakening northerly winds in the southern waters. Winds shift to become south to southwest across the waters by this evening ahead of a surface frontal boundary before shifting to become northerly by Sunday morning. A long period west to northwest swell will continue to impact the waters through Saturday. This will create conditions hazardous to small crafts. Additional long period northwest swells will arrive this weekend and early next week.

MTR WATCHES/WARNINGS/ADVISORIES. Tday. SCA . Mry Bay until 3 PM SCA . Pt Arena to Pt Reyes 0-10 nm until 3 PM SCA . Pt Reyes to Pigeon Pt 0-10 nm until 3 PM SCA . Pigeon Pt to Pt Pinos 0-10 nm until 3 PM SCA . Pt Pinos to Pt Piedras Blancas 0-10 nm until 3 PM SCA . Pt Arena to Pigeon Pt 10-60 nm until 3 PM SCA . Pigeon Pt to Pt Piedras Blancas 10-60 nm until 3 PM



PUBLIC FORECAST: RWW/DK AVIATION: Sims MARINE: Sims

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Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
RTYC1 - 9414523 - Redwood City, CA 9 mi49 min 57°F 54°F1021.2 hPa
AAMC1 - 9414750 - Alameda, CA 11 mi43 min 53°F
OBXC1 13 mi43 min 54°F 54°F
OMHC1 - 9414769 - Oakland Middle Harbor Met, CA 13 mi61 min SSW 1.9 G 2.9
LNDC1 13 mi49 min 55°F 1021 hPa
OKXC1 - 9414776 - Oakland (Berth 34), CA 14 mi43 min 54°F 1021.1 hPa
PXOC1 - 9414311 - San Francisco (Pier 1), CA 14 mi43 min 53°F 1020.1 hPa
PXSC1 14 mi43 min 55°F 55°F
FTPC1 - 9414290 - San Francisco, CA 16 mi49 min 54°F 54°F1021.2 hPa
PPXC1 - 9414847 - Richmond (Point Potrero), CA 21 mi43 min 55°F 1021.3 hPa
TIBC1 - Tiburon Pier, San Francisco Bay, CA 21 mi50 min Calm 53°F 1021 hPa
46237 - San Francisco Bar, CA (142) 21 mi31 min 54°F8 ft
RCMC1 - 9414863 - Richmond, CA 22 mi43 min 53°F
46026 - SAN FRANCISCO - 18NM West of San Francisco, CA 29 mi21 min SE 5.8 G 9.7 55°F 54°F1020.6 hPa
MZXC1 - 9415102 - Martinez-Amorco CA 31 mi49 min 54°F 51°F1021.1 hPa
DPXC1 - 9415141 - Davis Point, San Pablo Bay, CA 31 mi43 min 53°F 1020.8 hPa
UPBC1 31 mi61 min ENE 2.9 G 5.1
PCOC1 - 9415144 - Port Chicago, CA 34 mi43 min 51°F
46012 - HALF MOON BAY - 24NM South Southwest of San Francisco, CA 35 mi21 min ESE 3.9 G 7.8 55°F 55°F1020.4 hPa55°F
PSBC1 - 9415115 - Pittsburg (Suisun Bay), CA 38 mi49 min 53°F 1020.9 hPa
SFXC1 - San Francisco Bay Reserve, CA 44 mi76 min SSW 1.9
PRYC1 - 9415020 - Point Reyes, CA 44 mi49 min 53°F1020.5 hPa

Wind History for Redwood City, CA
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
San Francisco, San Francisco International Airport, CA2 mi65 minNE 53.00 miFog/Mist57°F53°F87%1020.9 hPa
San Carlos Airport, CA7 mi73 minNNE 55.00 miMostly Cloudy57°F55°F94%1021.7 hPa
Oakland, Metro Oakland International Airport, CA8 mi68 minN 01.00 miFog/Mist57°F54°F90%1021.5 hPa
Hayward, Hayward Air Terminal, CA11 mi67 minVar 36.00 miMostly Cloudy with Haze57°F52°F83%1022.2 hPa
Half Moon Bay Airport, CA12 mi61 minSSE 55.00 miFog/Mist59°F55°F88%1021.3 hPa
Palo Alto Airport, CA14 mi74 minVar 45.00 miPartly Cloudy with Haze55°F53°F94%1021.7 hPa

Link to 5 minute data for KSFO

Wind History from SFO (wind in knots)
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Last 24hrNE5NE3W11W13W12W12W11W9W8W7W6NW8NW6N3SE3SE4SE4CalmW5NE5SE6E4E3NE5
1 day agoNE3CalmNE3N4N4S3N3CalmCalmSE4SE3CalmW9W9W6CalmS3CalmNW3CalmE7E5CalmNE5
2 days agoN4N6N7N4N5W9W6W4N3CalmCalmCalmCalmCalmCalmCalmCalmCalmSE3SE4E3SE3E4NE3

Tide / Current Tables for Coyote Point Marina, San Francisco Bay, California
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Coyote Point Marina
Click for Map
Sat -- 01:17 AM PST     6.63 feet High Tide
Sat -- 06:26 AM PST     2.83 feet Low Tide
Sat -- 07:18 AM PST     Sunrise
Sat -- 08:04 AM PST     Moonrise
Sat -- 12:03 PM PST     7.70 feet High Tide
Sat -- 05:25 PM PST     Sunset
Sat -- 06:20 PM PST     Moonset
Sat -- 07:08 PM PST     -0.65 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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66.66.45.74.63.52.933.756.37.37.77.36.24.52.71.1-0.1-0.6-0.30.72.13.8

Tide / Current Tables for Oyster Point 2.8 mi E, South San Francisco Bay, California Current
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Oyster Point 2.8 mi E
Click for Map
Sat -- 01:31 AM PST     -0.00 knots Slack
Sat -- 04:13 AM PST     -0.86 knots Max Ebb
Sat -- 06:48 AM PST     0.00 knots Slack
Sat -- 07:18 AM PST     Sunrise
Sat -- 08:04 AM PST     Moonrise
Sat -- 09:42 AM PST     0.80 knots Max Flood
Sat -- 12:32 PM PST     -0.01 knots Slack
Sat -- 04:16 PM PST     -1.90 knots Max Ebb
Sat -- 05:24 PM PST     Sunset
Sat -- 06:20 PM PST     Moonset
Sat -- 07:40 PM PST     0.01 knots Slack
Sat -- 10:50 PM PST     1.09 knots Max Flood
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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0.80.3-0.3-0.7-0.9-0.8-0.40.10.50.70.80.60.3-0.3-1-1.6-1.9-1.8-1.3-0.60.20.711.1

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.
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Other links: Northern Pacific     Contential US     Full GOES-East
Wind Forecast for San Francisco/Monterey Bay Area, CA (16,3,4,5)
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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.