Wednesday, April8, 2020
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Marine Weather and Tides
San Rafael, 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 6:42AMSunset 7:41PM Wednesday April 8, 2020 4:28 AM PDT (11:28 UTC) Moonrise 7:43PMMoonset 6:25AM Illumination 100% Phase: Full Moon; Moon at 15 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- 237 Am Pdt Wed Apr 8 2020
Today..SW winds 5 to 15 kt.
Tonight..SW winds 10 to 20 kt with gusts up to 25 kt.
Thu..S winds up to 10 kt.
Thu night..W winds 5 to 10 kt.
Fri..W winds 5 to 15 kt with gusts up to 25 kt.
Fri night..W winds 5 to 15 kt.
Sat..SW winds up to 10 kt.
Sun..NW winds up to 10 kt.
PZZ500 237 Am Pdt Wed Apr 8 2020
Synopsis for the central california coast and bays including the Monterey bay..Greater farallones...and cordell bank national marine sanctuaries... The low pressure system continues to slowly move over southern california and farther inland. Northwest winds will remain breezy through the morning and then decrease. Lightly scattered showers over the southern waters are possible. Northwest swell through the week, with a long period southerly swell that gradually decreases.


7 Day Forecast for Marine Location Near San Rafael, CA
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location: 37.98, -122.47     debug


Area Discussion for - San Francisco/Monterey Bay Area, CA
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FXUS66 KMTR 080956 AFDMTR

Area Forecast Discussion National Weather Service San Francisco Bay Area 256 AM PDT Wed Apr 8 2020

SYNOPSIS. Isolated to scattered rain showers will be possible over the Central Coast through midweek while mainly dry conditions prevail to the north. Temperatures will begin a gradual warming trend late in the week and into the upcoming weekend as conditions dry out region-wide.

DISCUSSION. as of 2:55 AM PDT Wednesday . The pesky low pressure system that brought a variety of weather to the Bay Area and Central Coast the last few days remains off the coast. Overnight satellite imagery shows a broad circulation, with embedded smaller circulations, spinning near the Channel Islands. The cyclonic flow continues to advect moisture around the slow moving low pressure. The advecting moisture has resulted in bands of scattered showers moving over the San Joaquin Valley and southern Monterey/San Benito. Over the last six hours a few gauges have tipped in southern Monterey/San Benito with a few hundredths up to a few tenths. It should be noted shower activity is struggling to have any additional northern movement. Latest hi-res models, like the HRRR and local WRF, keep showers chances through day, but mainly south of San Jose. In fact, most likely locations for showers will still be confined to Monterey/San Benito, but a stray shower could drift north. The cold low pressure will make for an interesting split with temperatures around the Bay Area/Central Coast. Southern areas will remain seasonably cool with filtered sunshine/showers (Monterey Bay region southward) and northern areas will be mild an in a few spots above normal (San Jose northward).

For tonight, the low finally moves eastward and begins its slow exit of California. Before it finally exits a few additional bands of showers may drift across the forecast area Wednesday night and Thursday. Once again, best chance for precip will be south of San Jose. Additional rainfall will generally be light. Given the recent rain and lingering low level moisture patchy fog will be possible Wednesday night and early Thursday.

Showers will end by Thursday night with a warming and drying trend developing. Warmer and drier conditions are expect over the weekend and into early next week.

AVIATION. as of 10:55 PM PDT Tuesday . Humidities in the North and East Bay are running 15-20 percent drier than yesterday which reduces the chances for fog tonight.

Satellite image shows mid level clouds approaching the Bay Area from the south while low clouds are lurking over the waters. Models still showing moist northwest flow bringing MVFR cigs into the SFO and MRY Bay Area by 12Z and hanging around through early afternoon.

Vicinity of KSFO . Mid level clouds after 09Z. MVFR cigs after 12Z with bases around 2500 ft. Becoming scattered clouds after 21Z.

SFO Bridge Approach . Similar to KSFO.

Monterey Bay Terminals . Mid level clouds. Any precip should stay to the south. MVFR cigs after 12Z.

MARINE. as of 2:37 AM PDT Tuesday . The low pressure system continues to slowly move over southern California and farther inland. Northwest winds will remain breezy through the morning and then decrease. Lightly scattered showers over the southern waters are possible. Northwest swell through the week, with a long period southerly swell that gradually decreases.

MTR WATCHES/WARNINGS/ADVISORIES. Tday. SCA . Pigeon Pt to Pt Pinos 0-10 nm until 3 AM SCA . Pt Pinos to Pt Piedras Blancas 0-10 nm until 3 AM SCA . Pt Arena to Pigeon Pt 10-60 nm until 3 PM SCA . Pt Arena to Pt Reyes 0-10 nm until 9 AM SCA . Pigeon Pt to Pt Piedras Blancas 10-60 nm until 9 AM



PUBLIC FORECAST: MM AVIATION: W Pi MARINE: DK

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Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
RCMC1 - 9414863 - Richmond, CA 5 mi58 min SSE 5.1 G 9.9 53°F 56°F1013.8 hPa
TIBC1 - Tiburon Pier, San Francisco Bay, CA 6 mi78 min S 5.1 51°F 1014 hPa
PPXC1 - 9414847 - Richmond (Point Potrero), CA 8 mi58 min SE 13 G 17 53°F 1014.5 hPa
DPXC1 - 9415141 - Davis Point, San Pablo Bay, CA 12 mi58 min SW 7 G 8.9 51°F 1013.4 hPa
FTPC1 - 9414290 - San Francisco, CA 12 mi58 min 58°F
PXSC1 13 mi58 min 53°F 51°F
PXOC1 - 9414311 - San Francisco (Pier 1), CA 13 mi58 min SSW 4.1 G 8.9 52°F 1013.5 hPa
OMHC1 - 9414769 - Oakland Middle Harbor Met, CA 14 mi58 min S 4.1 G 8
OBXC1 14 mi58 min 52°F 51°F
OKXC1 - 9414776 - Oakland (Berth 34), CA 14 mi58 min SSW 5.1 G 8.9 52°F 1014.6 hPa
46237 - San Francisco Bar, CA (142) 16 mi58 min 55°F5 ft
LNDC1 16 mi58 min SSE 5.1 G 6 52°F 1014.6 hPa
AAMC1 - 9414750 - Alameda, CA 17 mi58 min WSW 9.9 G 12 53°F 58°F1014.8 hPa
UPBC1 19 mi58 min S 7 G 8
MZXC1 - 9415102 - Martinez-Amorco CA 19 mi58 min SE 5.1 G 6 53°F 58°F1014 hPa
PCOC1 - 9415144 - Port Chicago, CA 23 mi58 min SSW 7 G 12 50°F 58°F1013.5 hPa
46026 - SAN FRANCISCO - 18NM West of San Francisco, CA 25 mi38 min NW 14 G 18 51°F 52°F6 ft1015 hPa
SFXC1 - San Francisco Bay Reserve, CA 28 mi103 min SW 4.1
PSBC1 - 9415115 - Pittsburg (Suisun Bay), CA 31 mi58 min W 1.9 G 2.9 55°F 1013.3 hPa
RTYC1 - 9414523 - Redwood City, CA 35 mi58 min SSE 4.1 G 5.1 51°F 59°F1015.8 hPa
46013 - Bodega Bay - 48NM North Northwest of San Francisco, CA 48 mi38 min NW 25 G 31 51°F7 ft1013.2 hPa
46012 - HALF MOON BAY - 24NM South Southwest of San Francisco, CA 48 mi38 min NW 12 G 16 51°F 53°F7 ft1016.1 hPa48°F

Wind History for Richmond, CA
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Novato / Gnoss Field, CA12 mi53 minN 010.00 miFair46°F46°F100%1014.2 hPa
Napa, Napa County Airport, CA19 mi34 minESE 510.00 miFair44°F43°F96%1013.2 hPa
Petaluma Municipal Airport, CA20 mi33 minN 010.00 miFair41°F41°F100%1013.9 hPa
Concord, Buchanan Field, CA22 mi35 minS 910.00 miFair51°F44°F77%1012.6 hPa
Oakland, Metro Oakland International Airport, CA23 mi35 minSSW 1210.00 miMostly Cloudy54°F48°F80%1015 hPa

Link to 5 minute data for KDVO

Wind History from DVO (wind in knots)
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Last 24hrN6NW5N3CalmCalmN4N4NE4CalmCalmCalmNW9W6NW9NW4W7Calm3E44S4CalmSE4Calm
1 day agoCalmS5N4CalmN6N64CalmCalmSW6SW6SW4SE11SW7S5CalmCalmCalmCalmCalmSW4S7NW5Calm
2 days agoCalmS5S7W4SW8
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Tide / Current Tables for Point San Quentin, San Francisco Bay, California
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Point San Quentin
Click for Map
Wed -- 01:00 AM PDT     6.06 feet High Tide
Wed -- 06:43 AM PDT     Sunrise
Wed -- 07:08 AM PDT     -0.25 feet Low Tide
Wed -- 07:25 AM PDT     Moonset
Wed -- 01:29 PM PDT     5.57 feet High Tide
Wed -- 07:16 PM PDT     0.53 feet Low Tide
Wed -- 07:39 PM PDT     Sunset
Wed -- 08:43 PM PDT     Moonrise
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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5.76.15.74.631.40.2-0.2012.33.64.85.55.54.83.62.21.10.60.71.62.84.1

Tide / Current Tables for Point San Pablo Midchannel, San Pablo Bay, California Current
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Point San Pablo Midchannel
Click for Map
Wed -- 02:49 AM PDT     -0.00 knots Slack
Wed -- 05:57 AM PDT     -2.77 knots Max Ebb
Wed -- 06:43 AM PDT     Sunrise
Wed -- 07:25 AM PDT     Moonset
Wed -- 09:23 AM PDT     0.00 knots Slack
Wed -- 12:16 PM PDT     2.16 knots Max Flood
Wed -- 03:24 PM PDT     -0.01 knots Slack
Wed -- 06:05 PM PDT     -2.47 knots Max Ebb
Wed -- 07:39 PM PDT     Sunset
Wed -- 08:43 PM PDT     Moonrise
Wed -- 09:15 PM PDT     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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2.31.80.9-0.3-1.6-2.5-2.8-2.5-1.8-0.50.81.72.121.50.5-0.9-2-2.5-2.3-1.6-0.412

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.