Tuesday, March31, 2020
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Marine Weather and Tides
Sunnyvale, 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 6:51AMSunset 7:31PM Tuesday March 31, 2020 12:47 PM PDT (19:47 UTC) Moonrise 10:28AMMoonset 12:39AM Illumination 52% Phase: First Quarter Moon; Moon at 8 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- 843 Am Pdt Tue Mar 31 2020
Today..W winds 5 to 15 kt.
Tonight..W winds 10 to 20 kt with gusts up to 25 kt.
Wed..W winds 10 to 20 kt with gusts up to 25 kt.
Wed night..NW winds 10 to 20 kt with gusts up to 25 kt.
Thu..NW winds 5 to 15 kt with gusts up to 25 kt.
Thu night..W winds 10 to 20 kt with gusts up to 25 kt.
Fri..W winds 5 to 15 kt. A chance of showers.
Sat..SW winds 5 to 15 kt. A chance of showers.
PZZ500 843 Am Pdt Tue Mar 31 2020
Synopsis for the central california coast and bays including the Monterey bay..Greater farallones...and cordell bank national marine sanctuaries... Northwest winds will increase this afternoon through Wednesday night as a low pressure system moves inland over the pacific northwest. The waters off the big sur coast will likely see some gale-force winds and/or gusts. Additionally, can't rule out some isolated gale-force gusts for the outer waters north of point pinos. Mixed swell will persist with a moderate northwest swell and a light southwesterly swell.


7 Day Forecast for Marine Location Near Sunnyvale, CA
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location: 37.42, -121.98     debug


Area Discussion for - San Francisco/Monterey Bay Area, CA
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FXUS66 KMTR 311731 AFDMTR

Area Forecast Discussion National Weather Service San Francisco Bay Area Issued by National Weather Service Los Angeles/Oxnard CA 1031 AM PDT Tue Mar 31 2020

SYNOPSIS. Dry weather conditions with seasonable temperatures are forecast for the remainder of the week. Rain chances and cooler temperatures return by the upcoming weekend and will potentially continue into early next week.

DISCUSSION. as of 09:15 AM PDT Tuesday . A cloudy start to the day for the North Bay along with possibly a few light showers should give way to at least partly sunny conditions by the afternoon. Farther south plenty of sunshine and warmer temps than yesterday.

PREV DISCUSSION. as of 02:58 AM PDT Tuesday . An upper level low off of the British Columbia coast and associated trough extending into the Pacific Northwest continues to produce widespread cloud cover and isolated showers over northern California. With this, cannot rule out so very light precipitation over far northern portions of the North Bay today, mainly across northern Sonoma County. Elsewhere, dry weather conditions are likely today under a partly to mostly sunny sky. Temperatures will generally warm into the upper 50s along the immediate cost while 60s are likely inland.

Dry weather conditions are likely to persist through the remainder of the week as the storm track stays to the north. Additionally, temperatures will remain near to slightly below seasonal averages in response to a broad trough over the much of the western portion of the country. Overnight/morning temperatures will coo slightly by midweek as a slightly drier air mass filters into the region. This may allow for some inland valley locations to drop into the middle 30s by early Thursday and Friday mornings.

Surface high pressure will build over the eastern Pacific resulting in gusty northwest winds over the Pacific and near the coast from late today through Wednesday evening. However, wind speeds inland will generally remain light.

Deterministic models and ensembles continue to indicate the return to unsettled weather conditions by late this week (generally late Friday) and into the upcoming weekend. However, there remain some differences in model-to-model solutions with respect to timing and position of the mid/upper level trough. Regardless, look for a cooling trend and increased precipitation chances region-wide as we head into the upcoming weekend. Conditions potentially remain unsettled heading into early next week as well.

AVIATION. as of 10:30 AM PDT Tuesday . Visible satellite shows a mix of MVFR and VFR ceilings across Bay Area terminals this morning. Expect these ceilings to mix out this afternoon with mostly clear skies for all sites this afternoon. For tonight, expect mostly clear skies to continue. Onshore winds are expected this afternoon and evening.

Vicinity of KSFO . MVFR ceilings will persist through 19-20Z, then VFR conditions are anticipated this afternoon and tonight. Westerly winds 10-15 knots will develop this afternoon and continue through this evening.

SFO Bridge Approach . Current low clouds should dissipate early this afternoon with conditions similar to the terminal forecast.

Monterey Bay Terminals . VFR conditions are anticipated through TAF period. West to northwest winds expected this afternoon and evening.

MARINE. as of 10:15 AM PDT Tuesday . Northwest winds will increase this afternoon through Wednesday night as a low pressure system moves inland over the Pacific Northwest. The waters off the Big Sur coast will likely see some gale-force winds and/or gusts. Additionally, can't rule out some isolated gale-force gusts for the outer waters north of Point Pinos. Mixed swell will persist with a moderate northwest swell and a light southwesterly swell.

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



PUBLIC FORECAST: MW/RGass AVIATION: Rowe MARINE: Rowe

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Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
RTYC1 - 9414523 - Redwood City, CA 14 mi47 min N 4.1 G 7 57°F 60°F1023.9 hPa (-1.2)
AAMC1 - 9414750 - Alameda, CA 30 mi47 min S 2.9 G 5.1 56°F 59°F1023.6 hPa (-0.9)
LNDC1 30 mi47 min SW 2.9 G 4.1 57°F 1023.4 hPa (-1.0)
OMHC1 - 9414769 - Oakland Middle Harbor Met, CA 32 mi47 min SW 2.9 G 4.1
OBXC1 33 mi47 min 56°F 54°F
OKXC1 - 9414776 - Oakland (Berth 34), CA 33 mi47 min WNW 2.9 G 4.1 55°F 1023.6 hPa (-0.9)
PXSC1 34 mi47 min 56°F 55°F
PXOC1 - 9414311 - San Francisco (Pier 1), CA 34 mi47 min SE 6 G 7 55°F 1022.5 hPa (-1.0)
FTPC1 - 9414290 - San Francisco, CA 37 mi47 min W 5.1 G 8.9 56°F 60°F1023.7 hPa
PPXC1 - 9414847 - Richmond (Point Potrero), CA 39 mi47 min S 8 G 9.9 57°F 1023.8 hPa (-0.9)
TIBC1 - Tiburon Pier, San Francisco Bay, CA 41 mi31 min SSE 8.9 55°F 1023 hPa
RCMC1 - 9414863 - Richmond, CA 42 mi47 min S 6 G 8.9 56°F 58°F1023.1 hPa (-1.0)
PSBC1 - 9415115 - Pittsburg (Suisun Bay), CA 43 mi47 min NW 13 G 17 59°F 1022.4 hPa (-1.3)
UPBC1 43 mi47 min WNW 9.9 G 13
46237 - San Francisco Bar, CA (142) 43 mi47 min 56°F3 ft
MZXC1 - 9415102 - Martinez-Amorco CA 43 mi47 min W 9.9 G 12 58°F 58°F1023 hPa (-1.2)
PCOC1 - 9415144 - Port Chicago, CA 44 mi47 min W 12 G 15 58°F 58°F1022.8 hPa (-1.0)
MLSC1 - Moss Landing, South Harbor, CA 44 mi26 min W 8 G 21 57°F 1022.6 hPa51°F
ELXC1 - Elkhorn Slough Reserve, CA 44 mi62 min NW 2.9 63°F 1037 hPa53°F
DPXC1 - 9415141 - Davis Point, San Pablo Bay, CA 46 mi47 min SW 5.1 G 5.1 58°F 1023.1 hPa (-0.7)
46092 - MBM1 46 mi79 min NW 7.8 54°F 57°F1023.4 hPa (-0.3)
46012 - HALF MOON BAY - 24NM South Southwest of San Francisco, CA 48 mi17 min NNW 9.7 G 14 54°F 57°F1024.2 hPa52°F
46042 - MONTEREY - 27NM West of Monterey Bay, CA 49 mi27 min NW 16 G 19 54°F 57°F1023.1 hPa52°F

Wind History for Redwood City, CA
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
San Jose, San Jose International Airport, CA4 mi54 minN 510.00 miA Few Clouds62°F48°F62%1023.1 hPa
Palo Alto Airport, CA8 mi60 minNNE 710.00 miPartly Cloudy59°F51°F77%1023.7 hPa
San Jose / Reid / Hillv, CA10 mi60 minN 010.00 miA Few Clouds61°F50°F68%1023.4 hPa
San Carlos Airport, CA16 mi1.8 hrsVar 410.00 miMostly Cloudy57°F51°F82%1024 hPa
Hayward, Hayward Air Terminal, CA18 mi53 minVar 410.00 miMostly Cloudy59°F50°F72%1024.5 hPa
Livermore, Livermore Municipal Airport, CA21 mi54 minN 010.00 miPartly Cloudy61°F48°F65%1022.6 hPa
Oakland, Metro Oakland International Airport, CA23 mi54 minSSW 510.00 miMostly Cloudy60°F51°F72%1023.8 hPa
San Francisco, San Francisco International Airport, CA24 mi51 minENE 510.00 miOvercast58°F52°F81%1023.3 hPa

Link to 5 minute data for KSJC

Wind History from SJC (wind in knots)
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Last 24hrCalmCalmNW8NW9NW12NW11NW13N8N8
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NW8NW5CalmCalmCalmSW3CalmCalmCalmCalmSW3N43CalmN5
1 day agoS7SW4SE3SE3N10N11NW7NW8N6N11N6NW4NW6N4CalmCalmCalmCalmCalmNW3NW5N4E4Calm
2 days agoS3W3Calm4SW5SW3CalmN4CalmE3SE3S4CalmCalmS4SE6SE6SE6SE5S7S10SE8S8SE7

Tide / Current Tables for Gold Street Bridge, Alviso Slough, San Francisco Bay, California
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Gold Street Bridge
Click for Map
Tue -- 12:34 AM PDT     3.29 feet Low Tide
Tue -- 01:39 AM PDT     Moonset
Tue -- 05:30 AM PDT     8.50 feet High Tide
Tue -- 06:53 AM PDT     Sunrise
Tue -- 11:28 AM PDT     Moonrise
Tue -- 01:58 PM PDT     0.36 feet Low Tide
Tue -- 07:30 PM PDT     Sunset
Tue -- 08:41 PM PDT     6.46 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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3.43.44.25.67.28.38.4875.64.12.61.30.60.40.81.93.24.55.76.36.465.2

Tide / Current Tables for Dumbarton Point 2.3 mi NE, South San Francisco Bay, California Current
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Dumbarton Point 2.3 mi NE
Click for Map
Tue -- 12:24 AM PDT     0.00 knots Slack
Tue -- 01:39 AM PDT     Moonset
Tue -- 03:19 AM PDT     0.54 knots Max Flood
Tue -- 05:49 AM PDT     -0.00 knots Slack
Tue -- 06:54 AM PDT     Sunrise
Tue -- 11:05 AM PDT     -1.01 knots Max Ebb
Tue -- 11:28 AM PDT     Moonrise
Tue -- 02:00 PM PDT     0.00 knots Slack
Tue -- 04:47 PM PDT     0.91 knots Max Flood
Tue -- 07:30 PM PDT     Sunset
Tue -- 08:29 PM PDT     -0.00 knots Slack
Tue -- 11:51 PM PDT     -0.40 knots Max Ebb
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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-0.10.10.30.50.50.3-0-0.2-0.5-0.7-0.9-1-0.8-0.4-00.50.80.90.80.60.2-0.1-0.3-0.4

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 (15,3,4,5)
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Ground Weather Radar Station San Francisco Bay Area, CA
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Disclaimer:
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.