Wednesday, January22, 2020
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Marine Weather and Tides
Mountain View, 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 7:17AMSunset 5:21PM Tuesday January 21, 2020 11:26 PM PST (07:26 UTC) Moonrise 4:39AMMoonset 2:36PM Illumination 9% Phase: Waning Crescent; Moon at 27 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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PZZ531 San Francisco Bay South Of The Bay Bridge- 856 Pm Pst Tue Jan 21 2020
Tonight..S winds 5 to 15 kt, becoming nw 5 to 10 kt after midnight. Rain likely, mainly this evening.
Wed..NW winds up to 10 kt.
Wed night..N winds up to 10 kt.
Thu..NW winds up to 10 kt.
Thu night..NW winds 5 to 10 kt.
Fri..NW winds 5 to 15 kt.
Fri night..SW winds around 5 kt. A chance of rain.
Sat..S winds up to 10 kt. Rain likely.
Sun..SW winds 5 to 10 kt. Rain likely.
PZZ500 856 Pm Pst Tue Jan 21 2020
Synopsis for the central california coast and bays including the Monterey bay..Greater farallones...and cordell bank national marine sanctuaries... Moderate to locally gusty southerly winds will persist ahead of a cold front that will continue to move through the region tonight. Winds will generally be light in wake of the frontal passage. A longer period northwest swell will peak midweek generating hazardous seas conditions for smaller vessels. Another long period northwest swell will then arrive later this week.


7 Day Forecast for Marine Location Near Mountain View, CA
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location: 37.45, -122.06     debug


Area Discussion for - San Francisco/Monterey Bay Area, CA
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FXUS66 KMTR 220613 AFDMTR

Area Forecast Discussion National Weather Service San Francisco Bay Area 1013 PM PST Tue Jan 21 2020

SYNOPSIS. Mostly dry and warmer conditions will return mid week with rain likely to return over the upcoming weekend.

DISCUSSION. as of 9:23 PM PST Tuesday . The cold front has generated mainly light rain and drizzle and continues to fizzle out as it moves southeast this evening. However, over the North Bay localized amounts of over 1 inch have been measured, for example Mt Veeder with 1.30 inches, 1.28 inches in Angwin, 1.49 inches Mill Valley/Mt Tam (locally higher amounts nearby) and 1.70 inches in Kentfield. To the south amounts dropped off fairly quickly with a few hundredths to locally a couple tenths of an inch to isolated amounts near one third to seven tenths of an inch over the East Bay to the Santa Cruz Mountains. Only a few hundredths of an inch have been measured on the North Central Coast.

Drier weather returns Wednesday and Thursday with warmer temperatures as an upper level ridge builds in from the west, patchy valley fog is likely at night and early morning hours. For additional information please see previous discussion.

PREV DISCUSSION. as of 2:33 PM PST Tuesday . Rain chances will decrease from north to south overnight with perhaps a few lingering showers around sunrise in parts of Monterey County. An upper level ridge will build over the the West Coast on Wednesday and Thursday, allowing for dry and warming conditions region-wide. There will likely be some overnight valley fog development, so there is some uncertainty in regard to maximum temperatures if, for example, low clouds/fog linger through the day in the North and East Bay Valleys. Locations with mostly clear skies in the afternoon will likely warm into the 60s with potential for middle and even upper 60s in parts of southern Monterey County.

Forecast guidance indicates another round of wet weather to return over the weekend to parts of northern and central California. At this point in time it appears to be a bit wetter than today's system, but the heaviest precipitation will be focused north and of our area. Looking ahead to next week, high pressure over the eastern Pacific will keep the storm track directed at the Pacific Northwest with northern California on the southern edge of these systems. The latest precipitation outlooks from the Climate Prediction Center gives much of the Bay Area and central California coast slightly favored odds of experiencing drier than normal conditions for both the 6-10 day and 8-14 day periods.

AVIATION. as of 9:55 PM PST Tuesday . For 06z TAFs. A weak frontal boundary continues to slide south across the forecast area bringing lower cigs, lower vsbys, as well as light rain to the Bay Area southward. Lingering low level moisture will keep patchy fog over Santa Rosa through tonight. Moderate southerly winds are expected ahead of the front. Winds will not see they typical switch to the west or northwest behind the front but rather turn variable or stay southerly. Winds will return to a more westerly direction Wednesday afternoon.

Vicinity of KSFO . MVFR/VFR conditions will prevail tonight with vcsh then tapering overnight. Moderate and locally gusty southerly winds will ease this evening becoming light and variable overnight then veer to the west Wednesday afternoon.

SFO Bridge Approach . Similar to KSFO.

Monterey Bay Terminals . MVFR/VFR cigs will prevail tonight with rain showers expected by this evening then tapering overnight. Light southeasterly winds will prevail overnight then veer to the west Wednesday afternoon.

MARINE. as of 8:56 PM PST Tuesday . Moderate to locally gusty southerly winds will persist ahead of a cold front that will continue to move through the region tonight. Winds will generally be light in wake of the frontal passage. A longer period northwest swell will peak midweek generating hazardous seas conditions for smaller vessels. Another long period northwest swell will then arrive later this week.

MTR WATCHES/WARNINGS/ADVISORIES. Tngt. SCA . Pt Arena to Pt Reyes 0-10 nm SCA . Pt Reyes to Pigeon Pt 0-10 nm SCA . Pigeon Pt to Pt Pinos 0-10 nm SCA . Pt Pinos to Pt Piedras Blancas 0-10 nm SCA . Pt Arena to Pigeon Pt 10-60 nm SCA . Pigeon Pt to Pt Piedras Blancas 10-60 nm



PUBLIC FORECAST: Canepa/Rowe AVIATION: CW MARINE: RGass

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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 mi57 min 56°F 52°F1022.4 hPa
AAMC1 - 9414750 - Alameda, CA 26 mi57 min 53°F 52°F1022 hPa
LNDC1 27 mi57 min 53°F 1022 hPa
OMHC1 - 9414769 - Oakland Middle Harbor Met, CA 28 mi159 min ESE 5.1 G 6
OBXC1 29 mi57 min 53°F 53°F
OKXC1 - 9414776 - Oakland (Berth 34), CA 29 mi57 min 52°F 1022.1 hPa
PXSC1 30 mi57 min 53°F 53°F
PXOC1 - 9414311 - San Francisco (Pier 1), CA 30 mi57 min 52°F 1021 hPa
FTPC1 - 9414290 - San Francisco, CA 33 mi57 min 54°F 53°F1022.1 hPa
PPXC1 - 9414847 - Richmond (Point Potrero), CA 35 mi57 min 54°F 1022.4 hPa
TIBC1 - Tiburon Pier, San Francisco Bay, CA 37 mi40 min SSE 2.9 54°F 1022 hPa
46237 - San Francisco Bar, CA (142) 38 mi57 min 53°F10 ft
RCMC1 - 9414863 - Richmond, CA 38 mi57 min 53°F 52°F1021.8 hPa
UPBC1 41 mi159 min WSW 2.9 G 5.1
MZXC1 - 9415102 - Martinez-Amorco CA 41 mi57 min 54°F 50°F1021.6 hPa
PCOC1 - 9415144 - Port Chicago, CA 42 mi57 min 54°F 49°F1021.5 hPa
PSBC1 - 9415115 - Pittsburg (Suisun Bay), CA 42 mi57 min 54°F 1021.8 hPa
DPXC1 - 9415141 - Davis Point, San Pablo Bay, CA 43 mi57 min 53°F 1021.6 hPa
46012 - HALF MOON BAY - 24NM South Southwest of San Francisco, CA 44 mi37 min NW 3.9 G 7.8 54°F 55°F12 ft1022.6 hPa53°F
46026 - SAN FRANCISCO - 18NM West of San Francisco, CA 46 mi37 min NNW 3.9 G 5.8 54°F 54°F10 ft1022.8 hPa
MLSC1 - Moss Landing, South Harbor, CA 47 mi40 min NE 4.1 G 11 53°F 1023.1 hPa52°F
ELXC1 - Elkhorn Slough Reserve, CA 47 mi102 min Calm 53°F 1025 hPa52°F
46092 - MBM1 48 mi70 min S 14 55°F 54°F1021.8 hPa (+0.8)
46042 - MONTEREY - 27NM West of Monterey Bay, CA 49 mi37 min SSE 18 G 21 54°F 55°F13 ft1022.5 hPa53°F

Wind History for Redwood City, CA
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Palo Alto Airport, CA4 mi2.7 hrsSE 710.00 miOvercast55°F48°F77%1021.3 hPa
San Jose, San Jose International Airport, CA9 mi34 minSSE 510.00 miMostly Cloudy56°F48°F77%1022.3 hPa
San Carlos Airport, CA11 mi32 minSSE 710.00 miOvercast55°F51°F88%1022.3 hPa
Hayward, Hayward Air Terminal, CA15 mi33 minSSE 810.00 miOvercast55°F48°F80%1023 hPa
San Jose / Reid / Hillv, CA15 mi1.7 hrsSE 810.00 miMostly Cloudy55°F48°F77%1022.3 hPa
Oakland, Metro Oakland International Airport, CA19 mi34 minSE 410.00 miOvercast55°F52°F90%1022.4 hPa
San Francisco, San Francisco International Airport, CA20 mi91 minSSE 69.00 miOvercast56°F51°F84%1021.6 hPa
Livermore, Livermore Municipal Airport, CA21 mi34 minWSW 310.00 miOvercast53°F48°F86%1021.6 hPa
Half Moon Bay Airport, CA24 mi32 minSE 77.00 miOvercast54°F51°F94%1022.7 hPa

Link to 5 minute data for KNUQ

Wind History from NUQ (wind in knots)
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Tide / Current Tables for Calaveras Point, west of, San Francisco Bay, California
   EDIT   Weekend mode (on/off)   (on/off)   Help   One Week of Data
Calaveras Point
Click for Map
Wed -- 04:49 AM PST     3.00 feet Low Tide
Wed -- 05:39 AM PST     Moonrise
Wed -- 07:18 AM PST     Sunrise
Wed -- 10:16 AM PST     9.37 feet High Tide
Wed -- 03:27 PM PST     Moonset
Wed -- 05:21 PM PST     Sunset
Wed -- 05:58 PM PST     -0.69 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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7.56.85.64.23.333.75.16.88.49.39.28.26.64.52.40.7-0.4-0.7-0.21.12.94.86.6

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
Wed -- 03:20 AM PST     -0.59 knots Max Ebb
Wed -- 05:09 AM PST     0.00 knots Slack
Wed -- 05:39 AM PST     Moonrise
Wed -- 07:18 AM PST     Sunrise
Wed -- 07:45 AM PST     1.10 knots Max Flood
Wed -- 10:32 AM PST     -0.00 knots Slack
Wed -- 03:23 PM PST     -1.48 knots Max Ebb
Wed -- 03:27 PM PST     Moonset
Wed -- 05:21 PM PST     Sunset
Wed -- 06:12 PM PST     0.01 knots Slack
Wed -- 09:06 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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-0.1-0.4-0.5-0.6-0.5-0.10.511.10.90.4-0.2-0.7-1.1-1.4-1.5-1.4-1-0.20.71.31.61.41

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 (2,6,7,8)
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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.