Saturday, March28, 2020
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Marine Weather and Tides
Alameda, 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 6:57AMSunset 7:30PM Saturday March 28, 2020 10:30 AM PDT (17:30 UTC) Moonrise 8:27AMMoonset 10:43PM Illumination 21% Phase: Waxing Crescent; Moon at 5 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- 801 Am Pdt Sat Mar 28 2020
Today..SW winds around 5 kt, increasing to 5 to 15 kt this afternoon. Rain.
Tonight..SW winds 5 to 10 kt. Rain.
Sun..S winds 5 to 15 kt. Rain.
Sun night..W winds 5 to 15 kt.
Mon..W winds 5 to 10 kt.
Mon night..W winds 5 to 10 kt.
Tue..NW winds 5 to 10 kt.
Wed..NW winds up to 10 kt.
PZZ500 801 Am Pdt Sat Mar 28 2020
Synopsis for the central california coast and bays including the Monterey bay..Greater farallones...and cordell bank national marine sanctuaries... High pressure will shift into the southern california waters as a low pressure system moves into waters off the coast of the pacific northwest. This will keep winds generally light through the weekend and into early next week. Mixed swell will persist with a moderate northwest swell and a light southwesterly swell.


7 Day Forecast for Marine Location Near Alameda city, CA
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location: 37.78, -122.28     debug


Area Discussion for - San Francisco/Monterey Bay Area, CA
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FXUS66 KMTR 281554 AFDMTR

Area Forecast Discussion National Weather Service San Francisco Bay Area 854 AM PDT Sat Mar 28 2020

SYNOPSIS. Light rain showers on and off today for the Bay Area under cloudy skies. There may be a brief lull in showers tonight before the cold front arrives with another round of organized, mainly light rainfall Sunday morning into Sunday afternoon. Skies turn partly cloudy and showers end by Sunday evening. High pressure builds next week with a warming and drying trend.

DISCUSSION. as of 8:54 AM PDT Saturday . Radar continues to show widespread light rain across the region with most Bay Area locations reporting some light rain so far this morning. The system is weak and disorganized and we are currently in the warm advection region which is driving ascent and leading to the precip. There may be a brief lull in precip later this afternoon and evening but still need to hold onto light rain chances through tonight. Sunday morning the surface cold front and trough of cold air aloft will pass through the region. This will lead to a more organized period of rainfall for Sunday morning into early Sunday afternoon as the front moves through. Rain totals 0.25-0.50 on average with 0.10-0.25 for the interior valleys by Sunday evening.

The front is out of the region with dry conditions Sunday night. One fly in the ointment we'll have to monitor is the last few model runs of the NAM bring another shot of light rain to the North Bay on Monday. Will fine tune forecast on those details for this afternoon but high confidence for dry weather south of the Golden Gate on Monday with any North Bay rain on Monday being very light.

Increasing confidence that a prolong period of dry weather returns for the first week of April though longer range trends suggest more precip is possible beyond day 10.

AVIATION. as of 4:51 AM PDT Saturday . Radar is picking up precip just west of the Bay Area. Cigs dropping to near MVFR conditions with light rain by 15Z. Models forecast low-level moisture through early tonight so will see MVFR cigs continuing through the day. A brief break after 04Z before a secondary front arrives Sunday morning bringing rain and lower cigs back. Winds will switch to a south to southeast direction this morning with speeds under 10 kt. A switch to the west is expected in the afternoon.

Vicinity of KSFO . Light rain after 14-15Z with cigs becoming MVFR. Bases lowering to 2500 ft after 15Z then lowering further to 1500 ft after 20Z. Southeast winds under 10 kt becoming westerly to 10 kt in the afternoon.

SFO Bridge Approach . Similar to KSFO.

Monterey Bay Terminals . Becoming MVFR after 15Z with light showers after 18Z. Southerly winds 5-10 kt in the morning becoming west in the afternoon.

MARINE. as of 08:20 AM PDT Saturday . High pressure will shift into the southern California waters as a low pressure system moves into waters off the coast of the Pacific Northwest. This will keep winds generally light through the weekend and into early next week. Mixed swell will persist with a moderate northwest swell and a light southwesterly swell.

MTR WATCHES/WARNINGS/ADVISORIES. Tday. None.

PUBLIC FORECAST: RWW AVIATION: AS MARINE: AS

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Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
LNDC1 1 mi43 min ESE 4.1 G 7 51°F 1023.6 hPa
AAMC1 - 9414750 - Alameda, CA 1 mi43 min ESE 6 G 8.9 51°F 57°F1023.7 hPa
OMHC1 - 9414769 - Oakland Middle Harbor Met, CA 3 mi49 min SE 5.1 G 7
OBXC1 4 mi43 min 52°F 52°F
OKXC1 - 9414776 - Oakland (Berth 34), CA 4 mi43 min SE 5.1 G 7 51°F 1023.7 hPa
PXSC1 6 mi43 min 53°F 53°F
PXOC1 - 9414311 - San Francisco (Pier 1), CA 6 mi43 min E 6 G 7 52°F 1022.5 hPa
FTPC1 - 9414290 - San Francisco, CA 10 mi43 min 58°F
PPXC1 - 9414847 - Richmond (Point Potrero), CA 10 mi43 min SE 6 G 8 52°F 1023.9 hPa
TIBC1 - Tiburon Pier, San Francisco Bay, CA 12 mi39 min SE 5.1 51°F 1024 hPa (+1.0)
RCMC1 - 9414863 - Richmond, CA 12 mi43 min SE 2.9 G 6 52°F 56°F1023.3 hPa
46237 - San Francisco Bar, CA (142) 19 mi31 min 55°F3 ft
DPXC1 - 9415141 - Davis Point, San Pablo Bay, CA 19 mi43 min NW 2.9 G 5.1 52°F 1023.3 hPa
MZXC1 - 9415102 - Martinez-Amorco CA 19 mi43 min SW 1.9 G 4.1 51°F 56°F1023.5 hPa
RTYC1 - 9414523 - Redwood City, CA 19 mi43 min ESE 1.9 G 4.1 51°F 58°F1024.2 hPa
UPBC1 20 mi43 min WSW 2.9 G 4.1
PCOC1 - 9415144 - Port Chicago, CA 23 mi43 min S 4.1 G 6 51°F 57°F1023.2 hPa
PSBC1 - 9415115 - Pittsburg (Suisun Bay), CA 28 mi49 min WNW 5.1 G 6 52°F 1023.4 hPa
46026 - SAN FRANCISCO - 18NM West of San Francisco, CA 30 mi31 min SSE 3.9 G 3.9 52°F 55°F1024.3 hPa (+1.3)
SFXC1 - San Francisco Bay Reserve, CA 32 mi106 min WNW 1.9
46012 - HALF MOON BAY - 24NM South Southwest of San Francisco, CA 43 mi31 min SSW 3.9 G 3.9 54°F 56°F1024.3 hPa48°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 mi38 minSSE 910.00 miOvercast53°F48°F83%1023.8 hPa
Hayward, Hayward Air Terminal, CA12 mi37 minSE 76.00 miLight Rain Fog/Mist51°F48°F89%1024.7 hPa
San Francisco, San Francisco International Airport, CA12 mi35 minSE 48.00 miOvercast53°F48°F83%1023.5 hPa
San Carlos Airport, CA17 mi43 minN 010.00 miMostly Cloudy52°F48°F88%1024 hPa
Concord, Buchanan Field, CA18 mi38 minS 58.00 miLight Rain52°F48°F86%1022.2 hPa
Palo Alto Airport, CA22 mi1.7 hrsSE 67.00 miShowers Rain48°F46°F94%1023.7 hPa
Half Moon Bay Airport, CA22 mi36 minS 35.00 miFog/Mist52°F48°F88%1024 hPa

Link to 5 minute data for KOAK

Wind History from OAK (wind in knots)
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Last 24hrW17W13W15W14W15W15W14W11W10W11SW7W9SW6W8SW7SW6SE4S9S9S7E8E5SE9SE9
1 day agoSW6W8SW8W8W12W13W17W19W19W16W14W8CalmE3CalmNE3SE3E3NE4CalmCalmNW5W11W16
2 days ago45W11W15W12W16W19W18W20NW17NW14NW7NW6CalmNW6N4NE4E3E3NE4NE4CalmE3Calm

Tide / Current Tables for Oakland Inner Harbor, San Francisco Bay, California
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Oakland Inner Harbor
Click for Map
Sat -- 02:56 AM PDT     5.84 feet High Tide
Sat -- 06:59 AM PDT     Sunrise
Sat -- 09:26 AM PDT     0.53 feet Low Tide
Sat -- 09:26 AM PDT     Moonrise
Sat -- 04:12 PM PDT     4.61 feet High Tide
Sat -- 07:29 PM PDT     Sunset
Sat -- 09:13 PM PDT     2.35 feet Low Tide
Sat -- 11:43 PM PDT     Moonset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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44.95.65.85.54.73.42.11.10.60.61.11.92.93.74.34.64.543.32.72.42.53

Tide / Current Tables for Oakland Inner Harbor Reach, 33 ft. below datum Current
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Oakland Inner Harbor Reach
Click for MapFlood direction 82 true
Ebb direction 255 true

Sat -- 12:28 AM PDT     0.23 knots Max Flood
Sat -- 02:51 AM PDT     -0.01 knots Slack
Sat -- 05:44 AM PDT     -0.37 knots Max Ebb
Sat -- 06:59 AM PDT     Sunrise
Sat -- 08:25 AM PDT     0.00 knots Slack
Sat -- 09:26 AM PDT     Moonrise
Sat -- 01:14 PM PDT     0.26 knots Max Flood
Sat -- 04:13 PM PDT     -0.00 knots Slack
Sat -- 06:12 PM PDT     -0.22 knots Max Ebb
Sat -- 07:29 PM PDT     Sunset
Sat -- 08:08 PM PDT     0.00 knots Slack
Sat -- 11:43 PM PDT     Moonset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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0.20.20.1-0-0.2-0.3-0.4-0.2-0.100.10.20.20.30.20.10-0.1-0.2-0.2-000.10.1

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 (13,3,4,5)
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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.