Thursday, January23, 2020
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Marine Weather and Tides
East Palo Alto, 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 5:23PM Thursday January 23, 2020 11:19 AM PST (19:19 UTC) Moonrise 6:34AMMoonset 4:22PM Illumination 2% Phase: Waning Crescent; Moon at 28 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- 832 Am Pst Thu Jan 23 2020
Today..NE winds up to 10 kt.
Tonight..N winds up to 10 kt. Patchy fog.
Fri..SW winds up to 10 kt. Patchy fog.
Fri night..W winds up to 10 kt.
Sat..SE winds around 5 kt. A chance of rain.
Sat night..S winds 5 to 10 kt. Rain likely.
Sun..W winds 5 to 10 kt.
Mon..W winds up to 10 kt.
PZZ500 832 Am Pst Thu Jan 23 2020
Synopsis for the central california coast and bays including the Monterey bay..Greater farallones...and cordell bank national marine sanctuaries... Winds will generally be offshore and locally breezy near coastal gaps this afternoon. A long period wnw swell will begin to move into the waters later today, peaking on Friday and Saturday. A coastal jet with northerly winds will develop along the big sur coast by Friday afternoon, generating small craft advisory winds there. The next storm approaches later Saturday into Sunday with increasing southerly winds followed by another large northwest swell behind the front Sunday into Monday.


7 Day Forecast for Stanford CDP, CA
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location: 37.437, -122.153     debug


Area Discussion for - San Francisco/Monterey Bay Area, CA
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FXUS66 KMTR 231732 AFDMTR

Area Forecast Discussion National Weather Service San Francisco Bay Area 932 AM PST Thu Jan 23 2020

SYNOPSIS. Mainly dry weather conditions along with a gradual warming trend is expected through Friday. A weak storm system moving into Northern California will bring a chance of precipitation to the region this upcoming weekend.

DISCUSSION. as of 9:24 AM PST Thursday . Satellite imagery shows a lot of high clouds streaming over the state at this time, but even so, current temperature readings are running several degrees cooler than at yesterday at this time. Temps are ranging from the lower 40s to around 50 at area airports. Current observations also only indicate a few sites picking up patchy fog. Livermore is reporting 6 miles in patchy fog. On tap for today and Friday, filtered sunshine and mild high temps ranging from the upper 50s to mid 60s.

High pressure aloft will dominate the weather pattern over the next couple of days. The tail end of a weak system could touch off some showers across far northern Sonoma County tonight, but not much precipitation is expected. The upper level ridge will rebuild Friday into Saturday. Saturday will be another mild day across the Bay Area.

Rain chances will return over the weekend as a slightly stronger frontal boundary moves through the region. Rain chances initially begin across the North Bay on Saturday, before slowly moving southward by Sunday. Forecast rainfall amounts will generally be a few hundredths to possibly three quarters of an inch in the North Bay. Daytime temperatures will lower from Saturday to Sunday with upper 50s to lower 60s.

By early next week a ridge will rebuild over the west shunting the storm track farther north again resulting in a mostly dry forecast for our area. The tail end of a few storms may bring low end rain chances to the extreme northern part of the North Bay at times next week, but that is all.

AVIATION. as of 9:32 AM PST Thursday . For 18Z TAFs. Mid and high clouds continue to stream over the San Francisco Bay Area this morning, which helped limit the fog development compared to 24 hours ago. VFR conditions are forecast to prevail today with the passing SCT/BKN/OVC high clouds. These high cloud bases are expected to gradually lower over the next 12 to 24 hours as northern California will be on the southern extent of a system targeting the Pacific Northwest. Could see some MVFR/IFR ceilings (and possibly visibilities) by daybreak Friday along with the slight chance of showers from SFO north. Winds are forecast to be relatively light.

Vicinity of KSFO . VFR conditions are forecast to prevail today. Light easterly winds this morning will become west/northwest late in the day. Increasing mid/high clouds will stream over the area today with cloud bases gradually lowering through the afternoon and overnight.

SFO Bridge Approach . Similar to KSFO.

Monterey Bay Terminals . VFR conditions are forecast to prevail today at MRY and SNS. Offshore winds this morning will reverse and become onshore this afternoon. While communication problems persist with the SNS ASOS, the ASOS is still continuing to make observations.

MARINE. as of 8:32 AM PST Thursday . Winds will generally be offshore and locally breezy near coastal gaps this afternoon. A long period WNW swell will begin to move into the waters later today, peaking on Friday and Saturday. A coastal jet with northerly winds will develop along the Big Sur coast by Friday afternoon, generating small craft advisory winds there. The next storm approaches later Saturday into Sunday with increasing southerly winds followed by another large northwest swell behind the front Sunday into Monday.

MTR WATCHES/WARNINGS/ADVISORIES. Tday. NONE.



PUBLIC FORECAST: Sims AVIATION: Rowe MARINE: Rowe

Visit us at www.weather.gov/sanfrancisco

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Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
RTYC1 - 9414523 - Redwood City, CA 6 mi49 min 54°F 53°F1024.7 hPa
AAMC1 - 9414750 - Alameda, CA 24 mi49 min 52°F 52°F1024.3 hPa
LNDC1 26 mi49 min 53°F 1024.2 hPa
OBXC1 27 mi49 min 54°F 53°F
OMHC1 - 9414769 - Oakland Middle Harbor Met, CA 27 mi67 min SW 4.1 G 5.1
PXSC1 28 mi49 min 54°F 52°F
PXOC1 - 9414311 - San Francisco (Pier 1), CA 28 mi49 min 53°F 1023.3 hPa
OKXC1 - 9414776 - Oakland (Berth 34), CA 28 mi49 min 53°F 1024.3 hPa
FTPC1 - 9414290 - San Francisco, CA 30 mi49 min 53°F 53°F1024.2 hPa
PPXC1 - 9414847 - Richmond (Point Potrero), CA 34 mi49 min 57°F 1024.5 hPa
TIBC1 - Tiburon Pier, San Francisco Bay, CA 35 mi38 min NW 7 53°F 1024 hPa
46237 - San Francisco Bar, CA (142) 35 mi49 min 53°F5 ft
RCMC1 - 9414863 - Richmond, CA 36 mi49 min 55°F 53°F1023.9 hPa
46012 - HALF MOON BAY - 24NM South Southwest of San Francisco, CA 39 mi29 min E 3.9 G 5.8 55°F 55°F7 ft1024.1 hPa53°F
MZXC1 - 9415102 - Martinez-Amorco CA 41 mi49 min 50°F 50°F1024.9 hPa
46026 - SAN FRANCISCO - 18NM West of San Francisco, CA 42 mi29 min E 9.7 G 14 55°F 54°F6 ft1024.5 hPa
UPBC1 42 mi61 min E 4.1 G 5.1
PCOC1 - 9415144 - Port Chicago, CA 43 mi49 min 50°F 49°F1024.6 hPa
DPXC1 - 9415141 - Davis Point, San Pablo Bay, CA 43 mi49 min 51°F 1024.3 hPa
PSBC1 - 9415115 - Pittsburg (Suisun Bay), CA 44 mi49 min 52°F 1024.8 hPa
46042 - MONTEREY - 27NM West of Monterey Bay, CA 47 mi29 min E 9.7 G 14 55°F 55°F7 ft1023.5 hPa51°F
ELXC1 - Elkhorn Slough Reserve, CA 48 mi94 min E 4.1 59°F 1023 hPa51°F
46092 - MBM1 48 mi62 min ENE 9.7 55°F 55°F1022.9 hPa (+0.6)

Wind History for Redwood City, CA
(wind in knots)    EDIT      (on/off)   Help
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Palo Alto Airport, CA2 mi32 minVar 310.00 miMostly Cloudy54°F48°F82%1024.4 hPa
San Carlos Airport, CA10 mi32 minVar 38.00 miMostly Cloudy54°F50°F88%1024.7 hPa
San Jose, San Jose International Airport, CA11 mi26 minN 08.00 miMostly Cloudy55°F48°F80%1024.1 hPa
Hayward, Hayward Air Terminal, CA15 mi25 minSSW 49.00 miFair54°F48°F83%1025.1 hPa
San Jose / Reid / Hillv, CA17 mi2.5 hrsVar 410.00 miMostly Cloudy48°F46°F94%1024.4 hPa
Oakland, Metro Oakland International Airport, CA18 mi26 minE 710.00 miMostly Cloudy59°F48°F69%1024.2 hPa
San Francisco, San Francisco International Airport, CA18 mi23 minE 49.00 miMostly Cloudy55°F48°F77%1024 hPa
Half Moon Bay Airport, CA22 mi24 minNW 38.00 miFair57°F50°F77%1023.7 hPa
Livermore, Livermore Municipal Airport, CA23 mi26 minENE 910.00 miA Few Clouds55°F48°F80%1024.1 hPa

Link to 5 minute data for KPAO

Wind History from PAO (wind in knots)
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Last 24hr--N5N4N5N7NW4NW4W4W4Calm------------------CalmCalmCalmCalm3
1 day ago--SE10S11SE10SE9SE10SE11--SE10SE7------------------CalmCalmCalmCalmN5
2 days agoCalm43--CalmCalmCalmSE5CalmSE3------------------E3SE8SE6SE11SE7

Tide / Current Tables for Palo Alto Yacht Harbor, California
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Palo Alto Yacht Harbor
Click for Map
Thu -- 12:15 AM PST     6.63 feet High Tide
Thu -- 05:53 AM PST     2.95 feet Low Tide
Thu -- 06:34 AM PST     Moonrise
Thu -- 07:18 AM PST     Sunrise
Thu -- 11:07 AM PST     9.09 feet High Tide
Thu -- 04:22 PM PST     Moonset
Thu -- 05:22 PM PST     Sunset
Thu -- 06:33 PM PST     -0.87 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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6.66.56.15.34.23.333.65.16.98.49.18.77.664.12.10.4-0.7-0.80.32.14.15.7

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
Thu -- 12:19 AM PST     -0.00 knots Slack
Thu -- 04:07 AM PST     -0.61 knots Max Ebb
Thu -- 05:57 AM PST     0.00 knots Slack
Thu -- 06:34 AM PST     Moonrise
Thu -- 07:18 AM PST     Sunrise
Thu -- 08:31 AM PST     1.10 knots Max Flood
Thu -- 11:18 AM PST     -0.01 knots Slack
Thu -- 04:07 PM PST     -1.49 knots Max Ebb
Thu -- 04:22 PM PST     Moonset
Thu -- 05:22 PM PST     Sunset
Thu -- 06:56 PM PST     0.00 knots Slack
Thu -- 09:49 PM PST     1.57 knots Max Flood
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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0.2-0.2-0.4-0.6-0.6-0.500.711.10.80.2-0.3-0.8-1.2-1.4-1.5-1.3-0.80.10.91.41.61.3

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 (14,3,4,5)
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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.