Monday, December9, 2019
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Marine Weather and Tides
Los Gatos, 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 7:07AMSunset 4:51PM Sunday December 8, 2019 11:04 PM PST (07:04 UTC) Moonrise 2:57PMMoonset 3:29AM Illumination 93% Phase: Waxing Gibbous; Moon at 12 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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PZZ560 Coastal Waters From Pigeon Point To Point Pinos California Out To 10 Nm- 915 Pm Pst Sun Dec 8 2019
Tonight..NW winds 5 to 15 kt. Wind waves 1 to 2 ft. W swell 4 to 6 ft at 12 seconds and S around 2 ft at 15 seconds.
Mon..NW winds up to 10 kt. Wind waves 1 ft. W swell 3 to 5 ft at 15 seconds.
Mon night..NW winds 5 to 15 kt. Wind waves 1 ft. NW swell 3 to 5 ft at 15 seconds and S around 2 ft at 16 seconds.
Tue..NW winds up to 10 kt. Wind waves 1 to 2 ft. W swell 3 to 5 ft at 15 seconds and S around 2 ft at 16 seconds.
Tue night..S winds up to 10 kt. Wind waves 1 to 2 ft. W swell 5 to 7 ft at 15 seconds and S around 2 ft at 15 seconds.
Wed..E winds 5 to 15 kt. Wind waves 1 to 2 ft. W swell 6 to 8 ft at 15 seconds and S around 2 ft at 15 seconds.
Wed night..NE winds around 5 kt. Wind waves 1 ft. W swell 6 to 8 ft at 16 seconds.
Thu..N winds up to 10 kt. Wind waves 1 ft. W swell 9 to 11 ft.
Fri..NW winds up to 10 kt. Wind waves 1 ft. W swell 10 to 12 ft.
PZZ500 915 Pm Pst Sun Dec 8 2019
Synopsis for the central california coast and bays including the Monterey bay..Greater farallones...and cordell bank national marine sanctuaries... High pressure will build in from the west tonight and Monday. NExt chance of showers is Tuesday night into Wednesday while southerly winds will develop. A moderate west swell will continue tonight. A northwest swell arrives on Monday and gradually builds throughout the coming week.


7 Day Forecast for Marine Location Near Los Gatos, CA
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location: 37.24, -121.95     debug


Area Discussion for - San Francisco/Monterey Bay Area, CA
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FXUS66 KMTR 090613 AFDMTR

Area Forecast Discussion National Weather Service San Francisco Bay Area 1013 PM PST Sun Dec 8 2019

SYNOPSIS. Dry and mild weather is forecast through Tuesday afternoon. A weak weather system may produce light rain from late Tuesday into early Wednesday. Dry conditions are then forecast for most of Wednesday and Thursday before rain chances return late in the week and into the early part of next weekend.

DISCUSSION. As of 8:35 PM PST Sunday . Showers have ended across our area this evening as an upper trough moves off to our southeast. Primary forecast concern in the short term will be fog formation. Drying in the mid and upper levels will allow for good radiational cooling overnight and an upper ridge building just offshore will generate stable atmospheric conditions. These developments will likely result in fog formation overnight, especially where skies have cleared. Patchy dense fog is possible by late tonight and into Monday morning, something that will adversely impact the morning commute.

A shortwave ridge is forecast to build over California through Monday night, maintaining dry and stable conditions. Night and morning fog will continue to be an issue through Tuesday morning. A weak weather system approaching from the west may bring light rain to our area from Tuesday evening through early Wednesday morning. The 00Z NAM produces measurable rain across much of our forecast area by Wednesday morning. But rainfall amounts are expected to be light, with less than a quarter inch forecast in most areas.

A broad, low amplitude upper ridge is forecast to develop off the southern California coast by midweek and then remain in place through Friday. This ridge will deflect most of the energy and moisture from incoming Pacific weather systems to our north during the second half of the week, although the 12Z ECMWF develops light rain as far south as the North Bay counties late on Thursday. Precipitation chances will increase from late Friday into Saturday when the ridge weakens and a slightly stronger system moves into northern California. But even the Friday Night/Saturday system does not look particularly wet, with the model consensus indicating only light rainfall amounts.

In the longer range, both the GFS and ECMWF ensemble mean forecasts indicate the potential for more significant and widespread precipitation during the third week of December, especially later in the week.

AVIATION. as of 10:13 PM PST Sunday . Fog and low cloud ceilings continue to develop, generally expect IFR-VLIFR coverage to outweigh VFR later tonight into Monday morning. Mid to upper level drying will enhance night-time cooling and fog development. VFR returning by Monday afternoon, but could be slow to return depending on fog and low cloud coverage in the morning.

Vicinity of KSFO . VFR this evening, IFR ceiling forecast to develop by 11z Monday, LIFR by 16z in fog Monday morning. VFR returns early Monday afternoon.

SFO Bridge Approach . Similar to KSFO.

Monterey Bay Terminals . MVFR areas IFR tonight and Monday morning due to fog and low cloud ceilings. Winds light E-SE tonight. West winds returning Monday afternoon.

MARINE. as of 9:55 PM PST Sunday . High pressure will build in from the west tonight and Monday. Next chance of showers is Tuesday night into Wednesday while southerly winds will develop. A moderate west swell will continue tonight. A northwest swell arrives Monday and gradually builds throughout the coming week.

MTR WATCHES/WARNINGS/ADVISORIES. Tngt. None.

PUBLIC FORECAST: Dykema AVIATION/MARINE: Canepa

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 23 mi47 min S 1 G 1.9 53°F 56°F1020.4 hPa
ELXC1 - Elkhorn Slough Reserve, CA 31 mi80 min NNE 2.9 54°F 1019 hPa54°F
MLSC1 - Moss Landing, South Harbor, CA 31 mi61 min SE 2.9 G 9.9 53°F 1020 hPa53°F
46092 - MBM1 34 mi58 min NW 7.8 55°F 57°F1019.2 hPa (+2.0)
46042 - MONTEREY - 27NM West of Monterey Bay, CA 39 mi35 min NNW 12 G 16 56°F 57°F1020.2 hPa53°F
AAMC1 - 9414750 - Alameda, CA 41 mi47 min 55°F
46114 - West Monterey Bay, CA 42 mi35 min 57°F7 ft
46240 - Cabrillo Point, Monterey Bay, CA (158) 42 mi35 min 57°F3 ft
LNDC1 42 mi47 min Calm G 1.9 54°F 1019.8 hPa
MEYC1 44 mi89 min 58°F1019.6 hPa
OBXC1 44 mi47 min 53°F 53°F
OKXC1 - 9414776 - Oakland (Berth 34), CA 44 mi47 min NE 2.9 G 4.1 53°F 1019.8 hPa
PXOC1 - 9414311 - San Francisco (Pier 1), CA 45 mi53 min NNE 2.9 G 2.9 54°F 1018.8 hPa
FTPC1 - 9414290 - San Francisco, CA 48 mi53 min S 1.9 G 1.9 52°F 54°F1019.9 hPa

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, CA9 mi72 minNNW 85.00 miFog/Mist55°F52°F90%1019.8 hPa
Palo Alto Airport, CA19 mi2.3 hrsVar 310.00 miPartly Cloudy52°F50°F94%1019.3 hPa
Watsonville, Watsonville Municipal Airport, CA22 mi72 minN 010.00 miOvercast55°F52°F90%1019.6 hPa

Link to 5 minute data for KSJC

Wind History from SJC (wind in knots)
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Last 24hrS4E5SE5CalmCalmCalmNE33CalmN4E4CalmNW7NW7NW8NW9NW8NW7NW5N8NW10N5NW8NW6
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Tide / Current Tables for Gold Street Bridge, Alviso Slough, San Francisco Bay, California
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Gold Street Bridge
Click for Map
Mon -- 04:29 AM PST     Moonset
Mon -- 05:09 AM PST     2.29 feet Low Tide
Mon -- 07:10 AM PST     Sunrise
Mon -- 10:12 AM PST     9.97 feet High Tide
Mon -- 03:27 PM PST     Moonrise
Mon -- 04:49 PM PST     Sunset
Mon -- 06:17 PM PST     0.04 feet Low Tide
Mon -- 11:50 PM PST     7.34 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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6.85.94.83.62.72.32.84.56.78.89.99.88.97.45.53.51.80.60.10.41.73.65.56.9

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
Mon -- 02:47 AM PST     -0.70 knots Max Ebb
Mon -- 04:29 AM PST     Moonset
Mon -- 04:58 AM PST     0.00 knots Slack
Mon -- 07:11 AM PST     Sunrise
Mon -- 07:34 AM PST     1.07 knots Max Flood
Mon -- 10:31 AM PST     -0.00 knots Slack
Mon -- 03:06 PM PST     -1.28 knots Max Ebb
Mon -- 03:27 PM PST     Moonrise
Mon -- 04:50 PM PST     Sunset
Mon -- 05:55 PM PST     0.01 knots Slack
Mon -- 08:36 PM PST     1.28 knots Max Flood
Mon -- 11:51 PM PST     -0.01 knots Slack
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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-0.3-0.5-0.7-0.7-0.400.6110.80.3-0.2-0.6-0.9-1.2-1.3-1.1-0.60.10.81.21.310.6

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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