Thursday, December12, 2019
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Marine Weather and Tides
Mountain View, CA

Version 3.4
NOTICE
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.
6/2/2019. Many thanks to a user for reporting an error on one of the Edit pages. The switch to PHP 7.2 caused many pages that previously worked to quit working. I fixed many but I still depend on users to report ones I missed. Please report errors HERE or send an email to me at L-36.com. Allen

Sunrise 7:12AMSunset 4:52PM Thursday December 12, 2019 11:01 AM PST (19:01 UTC) Moonrise 5:34PMMoonset 7:38AM Illumination 99% Phase: Waning Gibbous; Moon at 16 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- 847 Am Pst Thu Dec 12 2019
Today..SW winds up to 10 kt. A chance of rain.
Tonight..SW winds around 5 kt. A chance of rain.
Fri..SW winds 5 to 10 kt. A chance of rain.
Fri night..W winds 5 to 10 kt. A chance of rain.
Sat..NW winds up to 10 kt. A slight chance of rain.
Sat night..W winds 5 to 10 kt.
Sun..NW winds up to 10 kt.
Mon..NE winds up to 10 kt. A chance of rain.
PZZ500 847 Am Pst Thu Dec 12 2019
Synopsis for the central california coast and bays including the Monterey bay..Greater farallones...and cordell bank national marine sanctuaries... Southerly winds remain light and will prevail through Thursday before switching to west to northwest. By Friday night, northwest winds will increase as the next storm system moves in. A large long-period northwest swell will impact the waters through Saturday. Hazardous conditions for small craft vessels will exist with this arriving northwest swell due to steep large seas.


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 121754 AFDMTR

Area Forecast Discussion National Weather Service San Francisco Bay Area 954 AM PST Thu Dec 12 2019

SYNOPSIS. Light rain will linger over the region through the morning before diminishing in coverage later in the day. Rain chances increase again Friday into Saturday with temperatures turning colder Sunday into Monday. An unsettled and wet pattern will likely return by middle of next week.

DISCUSSION. as of 9:36 AM PST Thursday . Lots of drizzle or light rain reports this morning as zonal flow aloft continues to bring moisture into the state. Expect on and off drizzle through the day, but decreasing overnight.

By late Friday into Saturday, moisture advection will again increase over the northern and central California coast ahead of an upper level system that will drop southward over the region. This will bring renewed chances for light to moderate rain first developing over the North Bay early Friday before spreading southward Friday night. The best chances for rainfall will be over the greater San Francisco Bay Area with lesser chances for the Central Coast. Unsettled (showery) conditions could persist into Saturday before drying out late Saturday night into Sunday.

Conditions will dry out and temperatures will turn cooler Sunday into early next week as a colder air mass moves over the area from the north. Looking for more widespread 30s and 40s for overnight lows from Saturday night into Monday night. Will need to watch for the potential for areas of frost or even freezing temperatures in the region's coldest interior valleys early next week.

While the operational models continue to differ in the details heading into the latter part of next week, the ensembles do indicate a return to unsettled and wet conditions with the potential for more widespread rainfall across the region during the extended forecast period.

AVIATION. as of 9:50 AM PST Thursday . for 18z TAFs. Low to mid-level stratus clouds surround the Bay Area and the Central Coast. Mostly widespread MVFR conditions but occasional IFR, even isolated terminals at LIFR, is possible as moisture from the ocean continues to move over the area. Less than 10 kts winds will prevail across all terminals. Isolated, very light on and off rain showers persist, but will be too weak to for extended showers that could wet runways. After sunset, forecast is for cigs to lower once again as MVFR continues trending toward IFR, locally LIFR-VLIFR overnight.

Vicinity of KSFO . Light winds prevail. MVFR conditions with cigs around 1500 feet as stratus clouds sit over the region. A passing shower is possible through the TAF period, but nothing for long durations. Lowering cigs is forecast tonight trending to IFR conditions.

SFO Bridge Approach . Similar to KSFO.

Monterey Bay Terminals . Winds are light with cigs around 1500 feet providing mostly MVFR conditions. Cigs should improve somewhat this afternoon but persist with MVFR. Light, passing showers are possible through the TAF period, but nothing long enough to wet runways. Tonight sees cigs lower once again to borderline LIFR/IFR overnight.

MARINE. as of 09:41 AM PST Thursday . Southerly winds remain light and will prevail through Thursday before switching to west to northwest. By Friday night, northwest winds will increase as the next storm system moves in. A large long-period northwest swell will impact the waters through Saturday. Hazardous conditions for small craft vessels will exist with this arriving northwest swell due to steep large seas.

MTR WATCHES/WARNINGS/ADVISORIES. Tday. High Surf Advisory . CAZ006-505-509-529-530 SCA . Pt Arena to Pt Reyes 0-10 nm from 10 AM SCA . Pt Reyes to Pigeon Pt 0-10 nm from 10 AM SCA . Pigeon Pt to Pt Pinos 0-10 nm from 10 AM SCA . Pt Pinos to Pt Piedras Blancas 0-10 nm from 10 AM SCA . Pt Arena to Pigeon Pt 10-60 nm from 10 AM SCA . Pigeon Pt to Pt Piedras Blancas 10-60 nm from 10 AM



PUBLIC FORECAST: Sims AVIATION: DK MARINE: DK

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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 mi56 min W 1.9 G 1.9 61°F 57°F1026.8 hPa
AAMC1 - 9414750 - Alameda, CA 26 mi56 min ESE 1.9 G 5.1 58°F 55°F1026.5 hPa
LNDC1 27 mi50 min S 2.9 G 4.1 60°F 1026.5 hPa
OMHC1 - 9414769 - Oakland Middle Harbor Met, CA 28 mi44 min WNW 1 G 1.9
OBXC1 29 mi50 min 58°F 58°F
OKXC1 - 9414776 - Oakland (Berth 34), CA 29 mi50 min WNW 4.1 G 4.1 56°F 1026.6 hPa
PXSC1 30 mi56 min 59°F 59°F
PXOC1 - 9414311 - San Francisco (Pier 1), CA 30 mi56 min N 2.9 G 2.9 57°F 1025.5 hPa
FTPC1 - 9414290 - San Francisco, CA 33 mi56 min WNW 6 G 8 57°F 55°F1026.7 hPa
PPXC1 - 9414847 - Richmond (Point Potrero), CA 35 mi56 min SSW 5.1 G 8.9 59°F 1026.8 hPa
TIBC1 - Tiburon Pier, San Francisco Bay, CA 37 mi63 min W 5.1 58°F 1027 hPa
46237 - San Francisco Bar, CA (142) 38 mi32 min 55°F7 ft
RCMC1 - 9414863 - Richmond, CA 38 mi56 min S 2.9 G 6 57°F 55°F1026.2 hPa
UPBC1 41 mi56 min NE 2.9 G 4.1
MZXC1 - 9415102 - Martinez-Amorco CA 41 mi44 min NE 1.9 G 4.1 54°F 54°F1026.6 hPa
PCOC1 - 9415144 - Port Chicago, CA 42 mi44 min NE 5.1 G 6 53°F 53°F1026.3 hPa
PSBC1 - 9415115 - Pittsburg (Suisun Bay), CA 42 mi44 min E 5.1 G 5.1 55°F 1026.6 hPa
DPXC1 - 9415141 - Davis Point, San Pablo Bay, CA 43 mi56 min WSW 5.1 G 6 58°F 1026.4 hPa
46012 - HALF MOON BAY - 24NM South Southwest of San Francisco, CA 44 mi32 min S 5.8 G 7.8 58°F 57°F1026.9 hPa57°F
46026 - SAN FRANCISCO - 18NM West of San Francisco, CA 46 mi22 min SW 1.9 G 3.9 57°F 56°F1027.3 hPa
MLSC1 - Moss Landing, South Harbor, CA 47 mi23 min NNW 2.9 G 7 59°F 1027.4 hPa55°F
ELXC1 - Elkhorn Slough Reserve, CA 47 mi77 min Calm 62°F 1028 hPa57°F
46092 - MBM1 48 mi55 min E 3.9 57°F 57°F1027.2 hPa (+1.7)
46042 - MONTEREY - 27NM West of Monterey Bay, CA 49 mi32 min SSE 3.9 G 5.8 58°F 57°F1027.1 hPa58°F

Wind History for Redwood City, CA
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Palo Alto Airport, CA4 mi75 minSSE 310.00 miMostly Cloudy63°F57°F83%1026.4 hPa
San Jose, San Jose International Airport, CA9 mi69 minSSE 910.00 miMostly Cloudy63°F55°F78%1026.2 hPa
San Carlos Airport, CA11 mi67 minN 010.00 miOvercast61°F59°F94%1026.7 hPa
Hayward, Hayward Air Terminal, CA15 mi68 minS 410.00 miOvercast62°F57°F84%1027.3 hPa
San Jose / Reid / Hillv, CA15 mi68 minSSE 510.00 miOvercast64°F57°F78%1026.4 hPa
Oakland, Metro Oakland International Airport, CA19 mi69 minS 510.00 miOvercast63°F55°F78%1026.5 hPa
San Francisco, San Francisco International Airport, CA20 mi66 minESE 510.00 miOvercast61°F57°F87%1026.1 hPa
Livermore, Livermore Municipal Airport, CA21 mi69 minN 010.00 miOvercast63°F55°F78%1025.8 hPa
Half Moon Bay Airport, CA24 mi67 minSSE 53.00 miFog/Mist57°F57°F100%1027.1 hPa

Link to 5 minute data for KNUQ

Wind History from NUQ (wind in knots)
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2 days ago------------------------------------------------

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
Thu -- 01:19 AM PST     7.47 feet High Tide
Thu -- 06:27 AM PST     2.91 feet Low Tide
Thu -- 07:13 AM PST     Sunrise
Thu -- 07:37 AM PST     Moonset
Thu -- 11:51 AM PST     9.20 feet High Tide
Thu -- 04:50 PM PST     Sunset
Thu -- 05:33 PM PST     Moonrise
Thu -- 07:26 PM PST     -0.86 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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6.77.47.36.353.733.14.15.77.48.79.28.77.55.73.51.5-0-0.8-0.70.423.9

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 -- 01:26 AM PST     -0.01 knots Slack
Thu -- 05:01 AM PST     -0.68 knots Max Ebb
Thu -- 06:51 AM PST     0.00 knots Slack
Thu -- 07:13 AM PST     Sunrise
Thu -- 07:37 AM PST     Moonset
Thu -- 09:31 AM PST     1.03 knots Max Flood
Thu -- 12:15 PM PST     -0.01 knots Slack
Thu -- 04:50 PM PST     Sunset
Thu -- 05:11 PM PST     -1.52 knots Max Ebb
Thu -- 05:33 PM PST     Moonrise
Thu -- 07:54 PM PST     0.00 knots Slack
Thu -- 10:39 PM PST     1.50 knots Max Flood
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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0.90.3-0.2-0.4-0.6-0.7-0.40.10.6110.70.2-0.3-0.7-1.1-1.4-1.5-1.3-0.70.10.91.41.5

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 (14,3,4,5)
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Ground Weather Radar Station San Francisco Bay Area, CA
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