Monday, December9, 2019
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Marine Weather and Tides
Mill Valley, 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 Monday December 9, 2019 3:05 PM PST (23:05 UTC) Moonrise 3:30PMMoonset 4:32AM Illumination 96% Phase: Waxing Gibbous; Moon at 13 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- 236 Pm Pst Mon Dec 9 2019
Tonight..SW winds up to 10 kt. Patchy fog.
Tue..E winds up to 10 kt. Patchy fog. A chance of rain.
Tue night..E winds up to 10 kt. A chance of rain.
Wed..NE winds 5 to 15 kt. A slight chance of rain.
Wed night..E winds up to 10 kt.
Thu..S winds 5 to 15 kt.
Thu night..SW winds around 5 kt.
Fri..W winds up to 10 kt.
Sat..W winds 5 to 15 kt. A chance of rain.
PZZ500 236 Pm Pst Mon Dec 9 2019
Synopsis for the central california coast and bays including the Monterey bay..Greater farallones...and cordell bank national marine sanctuaries... Light winds are forecast to prevail over the coastal waters tonight and into Tuesday. Areas of fog will likely develop overnight and into Tuesday. A weak system will then move through the region early this week bringing a chance of showers Tuesday night into Wednesday while winds turn southerly. Moderate northwest swell will persist through much of the week before a larger and longer period northwest swell arrives late this week.


7 Day Forecast for Marine Location Near Mill Valley, CA
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location: 37.91, -122.54     debug


Area Discussion for - San Francisco/Monterey Bay Area, CA
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FXUS66 KMTR 092055 AFDMTR

Area Forecast Discussion National Weather Service San Francisco Bay Area 1255 PM PST Mon Dec 9 2019

SYNOPSIS. Dry conditions with mild temperatures are forecast through Tuesday afternoon. Patchy dense fog is likely during the night and morning hours. A weak weather system may produce light rain from late Tuesday into early Wednesday. Dry conditions are then forecast for most of the second half of the work week before rain chances increase by Friday night or Saturday.

DISCUSSION. as of 12:55 PM PST Monday . Fog blanketed a good portion of the San Francisco Bay Area and parts of the central California coast this morning. Many airports throughout the region reported visibilities down to 1/4 mile or less. By mid-morning, the severity of the fog had gradually improved, allowing for the Dense Fog Advisory to expire as scheduled at 10 AM PST. With that said, though, as of mid-day overcast skies and locally-reduced visibilities are still being observed. Some locations may never clear this afternoon. With the high-amplitude upper level ridge over our area, will likely see a repeat overnight tonight and into Tuesday morning with fog impacting the area valleys and locations near sea level. Will monitor visibility trends closely and let the evening or night shift make the determination about any new Dense Fog Advisories.

The upper level ridge will quickly push eastward into the North American continent during the day on Tuesday. A fast-moving shortwave trough will then approach the California coast late Tuesday and into Wednesday. The precipitation associated with this shortwave will be light. Best potential for more than a few tenths of an inch of rain will be in the North Bay. The latest 3-km NAM brings around a tenth to a quarter of an inch to San Francisco and the East Bay with lesser amounts in the Santa Clara Valley. The timing of this rain looks to fall in the middle to late evening hours on Tuesday, wrapping up early to middle morning Wednesday. Some locations in Monterey and San Benito County will likely remain dry. Overall, low impacts are anticipated.

A broad, flat upper level ridge in the eastern Pacific between 20 and 30 degrees north latitude will largely push the core storm track to our north from the middle of the week onward. Models advertise a strong system to impact the Pacific Northwest and British Columbia late Wednesday and into Thursday. The North Bay will be on the far southern end of this system with the potential for light rain on Thursday or Friday. Little rainfall (if any) is expected south of the Golden Gate based on the latest guidance. Again, little or no weather-related impacts anticipated in our area.

And behind the late week system comes another shortwave trough over the weekend. Models have backed off a bit over the past several model runs in terms of rainfall totals, indicating a few or several tenths of an inch of rain. If the forecast plans out, little or no weather-related impacts are expected this this system as well.

Looking ahead to late this weekend and into early next week, both the GFS and ECMWF bring a ridge back to the West Coast. While this week from a synoptic meteorological aspect is rather active, the overall rain impacts from the series of successive systems will likely remain low for the San Francisco Bay Area.

AVIATION. as of 9:50 AM PST Monday . For 18z TAFs. Low clouds and fog appear well entrained in the valleys across the forecast area this morning. Anticipate a late scattering out of low clouds, possibly in the early afternoon hours. Some terminals will likely seeing little to no clearing at all. Have updated TAFs to reflect this. Otherwise light winds will prevail. Low clouds forecast to return this evening with patchy fog expected once again.

Vicinity of KSFO . IFR-LIFR conditions due to combination of low clouds and fog through at least this morning. It is possible either or both of these could last into the afternoon. VFR conditions expected by around 20z-22z before low clouds return overnight. Generally light winds expected through the period at or under 10 kt.

SFO Bridge Approach . Similar to KSFO.

Monterey Bay Terminals . Patchy IFR/LIFR conditions this morning due to fog and low clouds over KSNS. MVFR conditions forecast for KMRY. Low clouds expected to return this evening. Light southeast winds will turn onshore by this afternoon. Winds will turn easterly once again this evening.

MARINE. as of 8:51 AM PST Monday . High pressure will build in from the west into today, keeping winds generally light across the waters. A weak system will then move through the region early this week bringing a chance of showers Tuesday night into Wednesday while winds turn southerly. Moderate northwest swell will persist through much of the week before a larger and longer period northwest swell arrives late this week.

MTR WATCHES/WARNINGS/ADVISORIES. Tngt. None.

PUBLIC FORECAST: Rowe AVIATION: CW MARINE: CW/AS

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Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
TIBC1 - Tiburon Pier, San Francisco Bay, CA 5 mi54 min SSE 5.1 54°F 1022 hPa
RCMC1 - 9414863 - Richmond, CA 7 mi77 min 55°F
PPXC1 - 9414847 - Richmond (Point Potrero), CA 9 mi77 min SSW 2.9 G 4.1 55°F 1022.1 hPa
46237 - San Francisco Bar, CA (142) 10 mi65 min 55°F4 ft
PXOC1 - 9414311 - San Francisco (Pier 1), CA 11 mi47 min 54°F 1020.7 hPa
OKXC1 - 9414776 - Oakland (Berth 34), CA 13 mi47 min NNW 1.9 G 1.9
OBXC1 13 mi83 min 54°F 54°F
AAMC1 - 9414750 - Alameda, CA 16 mi53 min 55°F
LNDC1 16 mi47 min 54°F
DPXC1 - 9415141 - Davis Point, San Pablo Bay, CA 18 mi77 min NW 4.1 G 6 53°F 1021.5 hPa
46026 - SAN FRANCISCO - 18NM West of San Francisco, CA 19 mi35 min N 1.9 G 3.9 55°F 56°F1022.6 hPa
PRYC1 - 9415020 - Point Reyes, CA 24 mi53 min 54°F1021.6 hPa
UPBC1 24 mi77 min WNW 8 G 12
MZXC1 - 9415102 - Martinez-Amorco CA 24 mi53 min WNW 11 G 12 54°F
PCOC1 - 9415144 - Port Chicago, CA 28 mi77 min 54°F
RTYC1 - 9414523 - Redwood City, CA 33 mi47 min NNW 4.1 G 6
SFXC1 - San Francisco Bay Reserve, CA 34 mi80 min W 6 58°F 1021 hPa51°F
PSBC1 - 9415115 - Pittsburg (Suisun Bay), CA 36 mi83 min NNW 12 G 13 56°F 1021 hPa
46012 - HALF MOON BAY - 24NM South Southwest of San Francisco, CA 42 mi35 min WNW 5.8 G 9.7 56°F 57°F1022.3 hPa50°F
46013 - Bodega Bay - 48NM North Northwest of San Francisco, CA 47 mi35 min SW 3.9 G 5.8 54°F 55°F1022.4 hPa53°F
46214 - Point Reyes, CA (029) 49 mi35 min 56°F6 ft

Wind History for San Francisco, CA
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Novato / Gnoss Field, CA16 mi70 minNNE 39.00 miOvercast54°F53°F100%1022 hPa
Oakland, Metro Oakland International Airport, CA22 mi72 minWNW 310.00 miOvercast57°F48°F74%1021.8 hPa
San Francisco, San Francisco International Airport, CA22 mi69 minE 59.00 miOvercast56°F50°F81%1021.4 hPa
Petaluma Municipal Airport, CA24 mi70 minN 010.00 miOvercast52°F51°F100%1022 hPa

Link to 5 minute data for KDVO

Wind History from DVO (wind in knots)
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Last 24hrNW4CalmCalmCalmCalmCalmCalmCalmCalmCalmN3CalmCalmCalmCalmCalmSW3S5CalmCalmCalmCalmCalmCalm
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SW6SW3S5SW4E4CalmCalmCalmCalmSW6N3E3CalmCalmN4CalmCalm
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Tide / Current Tables for Corte Madera Creek, San Francisco Bay, California
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Corte Madera Creek
Click for Map
Mon -- 03:33 AM PST     2.05 feet Low Tide
Mon -- 04:32 AM PST     Moonset
Mon -- 07:14 AM PST     Sunrise
Mon -- 09:41 AM PST     6.01 feet High Tide
Mon -- 03:28 PM PST     Moonrise
Mon -- 04:41 PM PST     0.03 feet Low Tide
Mon -- 04:50 PM PST     Sunset
Mon -- 11:19 PM PST     4.42 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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3.83.22.52.12.12.53.44.35.25.965.54.63.31.90.80.20.10.51.32.23.244.4

Tide / Current Tables for Raccoon Strait off Hospital Cove, San Francisco Bay, California Current
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Raccoon Strait off Hospital Cove
Click for Map
Mon -- 01:13 AM PST     -1.16 knots Max Ebb
Mon -- 04:31 AM PST     Moonset
Mon -- 05:05 AM PST     0.00 knots Slack
Mon -- 07:08 AM PST     1.33 knots Max Flood
Mon -- 07:13 AM PST     Sunrise
Mon -- 10:15 AM PST     -0.00 knots Slack
Mon -- 01:32 PM PST     -2.13 knots Max Ebb
Mon -- 03:28 PM PST     Moonrise
Mon -- 04:50 PM PST     Sunset
Mon -- 06:02 PM PST     0.01 knots Slack
Mon -- 08:10 PM PST     1.60 knots Max Flood
Mon -- 11:35 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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-0.9-1.2-1.1-0.8-0.5-00.81.31.20.80.2-0.7-1.5-2.1-2.1-1.8-1.4-0.8-01.11.61.51.10.5

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 (18,4,5,8)
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Ground Weather Radar Station Sacramento, CA
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