Sunday, January19, 2020
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Marine Weather and Tides
Dillon Beach, 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 7:23AMSunset 5:19PM Sunday January 19, 2020 9:12 AM PST (17:12 UTC) Moonrise 2:35AMMoonset 1:12PM Illumination 30% Phase: Waning Crescent; Moon at 24 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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PZZ540 Coastal Waters From Point Arena To Point Reyes California Out To 10 Nm- 808 Am Pst Sun Jan 19 2020
.small craft advisory in effect until 3 pm pst this afternoon...
Rest of today..E winds up to 10 kt. Wind waves 1 to 2 ft. W swell 9 to 11 ft at 15 seconds.
Tonight..E winds up to 10 kt. Wind waves 1 to 2 ft. W swell 7 to 9 ft at 14 seconds.
Martin luther king jr day..SE winds around 10 kt. Wind waves 1 to 2 ft. W swell 6 to 8 ft at 19 seconds.
Mon night..S winds 10 to 20 kt with gusts up to 25 kt. Wind waves 3 to 4 ft. W swell 9 to 10 ft at 18 seconds. Rain.
Tue..SW winds 15 to 25 kt with gusts up to 30 kt. Wind waves 4 to 5 ft. W swell 9 to 11 ft at 16 seconds. Rain likely.
Tue night..NW winds 5 to 15 kt. Wind waves 1 to 2 ft. W swell 13 to 15 ft at 15 seconds.
Wed..NW winds up to 10 kt. Wind waves 1 ft. W swell 8 to 10 ft.
Thu..W winds up to 10 kt. Wind waves 1 ft. W swell 4 to 6 ft.
PZZ500 808 Am Pst Sun Jan 19 2020
Synopsis for the central california coast and bays including the Monterey bay..Greater farallones...and cordell bank national marine sanctuaries... Generally light to moderate offshore winds will persist across the coastal waters today as high pressure remains over the great basin. Winds will increase and turn southerly on Monday ahead of an approaching frontal system. Moderate northwest swell will continue through the afternoon generating hazardous seas conditions for small vessels. A larger northwest swell will arrive mid week.


7 Day Forecast for Marine Location Near Dillon Beach, CA
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location: 38.25, -122.98     debug


Area Discussion for - San Francisco/Monterey Bay Area, CA
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FXUS66 KMTR 191654 AFDMTR

Area Forecast Discussion National Weather Service San Francisco Bay Area 854 AM PST Sun Jan 19 2020

SYNOPSIS. High pressure building over the West Coast will result in dry and seasonably cool weather conditions through the weekend. Light rain is possible starting Monday, with higher chances of precipitation developing by Tuesday. Mostly dry conditions are then expected for the remainder of next week, with rain possibly returning next weekend.

DISCUSSION. as of 08:50 AM PST Sunday . The ongoing forecast through the short-term remains on track this morning with no updates needed at this time. Temperatures are generally in the upper 30s to upper 40s region-wide at this hour with high clouds streaming inland overhead. While patchy dense fog has been reported at the Byron, CA site in the far interior East Bay, fog is less widespread over the region this morning. For additional information, please see the previous forecast discussion below.

PREV DISCUSSION. As of 3:39 AM PST Sunday . High clouds continue to stream over the area, and temperatures are running a few degrees warmer than yesterday at this time with readings ranging from the upper 30s to upper 40s. Currently, the only observation indicating fog is Byron, in the East Bay, reporting a visibility of less than 1/4 of a mile. Highs today are expected to be a few degrees than yesterday as the upper ridge axis moves over the state. Highs from the mid 50s to mid 60s are expected.

An approaching upper level trough will bring increased cloudiness to the area on Monday leading to rain chances later on Monday. This trough is forecast to bring light rain to most of the forecast area late Monday night through Tuesday. A separate disturbance is forecast to bring moisture into Southern California ahead of the upper trough, and the ECMWF still indicates some precip chances across the southern counties including Monterey and San Benito by Monday afternoon, before the upper trough arrives. Rain chances will then increase from north to south late Monday night and Tuesday morning as the main frontal system arrives. Rainfall is forecast to be mostly light, but may be moderate at times in the North Bay. Most rain should end by late Tuesday, although a few showers may linger into Tuesday night. As much as three-quarters of an inch or rain is forecast in the North Bay through late Tuesday, with generally a third of an inch of less expected elsewhere in our forecast area.

Mostly dry conditions are expected through the remainder of the week with an upper ridge pushing the moisture to the north. The next rain chances look to be late next weekend when another trough approaches the area.

AVIATION. as of 08:50 AM PST Sunday . For 18z TAFs. VFR. High clouds at or above 10,000 ft will continue to stream over the region with generally light/variable winds. Predominantly NE to NW winds are forecast by this afternoon. While there is the potential for fog in the North Bay and East Bay Valleys on Monday morning, confidence remains low for development.

Vicinity of KSFO . VFR. Generally light SE winds this morning will reamin offshore through a majority of the day. Wind speeds will likely remain below 10 kt through the forecast period.

SFO Bridge Approach . Similar to KSFO.

Monterey Bay Terminals . VFR. Light SE winds this morning aside from locally breezy winds down the Salinas Valley around 15 kt. NW to NE winds develop by the afternoon.

MARINE. as of 08:50 AM PST Sunday . Generally light to moderate offshore winds will persist across the coastal waters today as high pressure remains over the Great Basin. Winds will increase and turn southerly on Monday ahead of an approaching frontal system. Moderate northwest swell will continue through the afternoon generating hazardous seas conditions for small vessels. A larger northwest swell will arrive mid week.

MTR WATCHES/WARNINGS/ADVISORIES. Tday. SCA . Pt Arena to Pt Reyes 0-10 nm until 3 PM SCA . Pt Reyes to Pigeon Pt 0-10 nm until 3 PM SCA . Pt Arena to Pigeon Pt 10-60 nm until 3 PM SCA . Pigeon Pt to Pt Piedras Blancas 10-60 nm until 3 PM



PUBLIC FORECAST: RGass/Sims AVIATION: RGass MARINE: RGass

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Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
46013 - Bodega Bay - 48NM North Northwest of San Francisco, CA 17 mi32 min E 12 G 19 53°F1021.3 hPa
PRYC1 - 9415020 - Point Reyes, CA 18 mi60 min 53°F1020.5 hPa
46214 - Point Reyes, CA (029) 34 mi42 min 54°F12 ft
46026 - SAN FRANCISCO - 18NM West of San Francisco, CA 35 mi32 min E 21 G 27 53°F 54°F1020.6 hPa
46237 - San Francisco Bar, CA (142) 37 mi42 min 53°F9 ft
TIBC1 - Tiburon Pier, San Francisco Bay, CA 38 mi49 min NNE 7 51°F 1022 hPa
RCMC1 - 9414863 - Richmond, CA 38 mi54 min 53°F
PPXC1 - 9414847 - Richmond (Point Potrero), CA 40 mi54 min 54°F 1022.1 hPa
DPXC1 - 9415141 - Davis Point, San Pablo Bay, CA 40 mi54 min 43°F 1022.2 hPa
FTPC1 - 9414290 - San Francisco, CA 41 mi60 min 50°F 53°F1021.8 hPa
PXSC1 44 mi54 min 51°F 42°F
PXOC1 - 9414311 - San Francisco (Pier 1), CA 44 mi54 min 50°F 1020.8 hPa
OBXC1 46 mi54 min 50°F 40°F
OMHC1 - 9414769 - Oakland Middle Harbor Met, CA 46 mi72 min SSW 2.9 G 4.1
OKXC1 - 9414776 - Oakland (Berth 34), CA 46 mi54 min 49°F 1021.8 hPa
MZXC1 - 9415102 - Martinez-Amorco CA 48 mi60 min 42°F 50°F1023.1 hPa
UPBC1 48 mi72 min ENE 6 G 8
LNDC1 49 mi54 min 50°F 1021.7 hPa
AAMC1 - 9414750 - Alameda, CA 49 mi54 min 52°F

Wind History for Point Reyes, CA
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Santa Rosa, Santa Rosa Sonoma County Airport, CA20 mi79 minN 010.00 miMostly Cloudy38°F37°F97%1021.6 hPa
Petaluma Municipal Airport, CA20 mi77 minE 510.00 miFair43°F41°F93%1022.3 hPa
Novato / Gnoss Field, CA24 mi77 minSSW 610.00 miFair45°F41°F87%1022.7 hPa

Link to 5 minute data for KO69

Wind History from O69 (wind in knots)
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Last 24hrCalmCalm4S5S9S6
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1 day agoCalmCalmW3CalmCalmSE5E4CalmSE3CalmS5SE5--CalmCalmCalmCalmCalmCalmCalmNE3CalmCalmCalm
2 days agoCalmE5
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E43CalmW5SW8--W5W5--CalmCalmCalmCalmCalmNE3CalmCalmCalmW4Calm3Calm

Tide / Current Tables for Tomales Bay entrance, California
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Tomales Bay Entrance
Click for Map
Sun -- 02:34 AM PST     Moonrise
Sun -- 06:34 AM PST     5.60 feet High Tide
Sun -- 07:25 AM PST     Sunrise
Sun -- 01:12 PM PST     Moonset
Sun -- 02:03 PM PST     0.06 feet Low Tide
Sun -- 05:19 PM PST     Sunset
Sun -- 08:30 PM PST     3.35 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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1.922.63.44.35.15.55.65.14.33.22.110.30.10.30.91.62.433.33.33.12.7

Tide / Current Tables for Point Reyes, California Current
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Point Reyes
Click for Map
Sun -- 01:15 AM PST     0.00 knots Slack
Sun -- 02:34 AM PST     Moonrise
Sun -- 04:16 AM PST     0.85 knots Max Flood
Sun -- 07:13 AM PST     -0.00 knots Slack
Sun -- 07:25 AM PST     Sunrise
Sun -- 10:27 AM PST     -1.29 knots Max Ebb
Sun -- 01:12 PM PST     Moonset
Sun -- 02:33 PM PST     0.00 knots Slack
Sun -- 05:20 PM PST     Sunset
Sun -- 05:38 PM PST     0.97 knots Max Flood
Sun -- 08:42 PM PST     -0.00 knots Slack
Sun -- 11:01 PM PST     -0.60 knots Max Ebb
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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-0.4-0.10.30.70.80.80.60.1-0.5-1-1.3-1.3-1.1-0.8-0.30.20.70.910.80.4-0.1-0.5-0.6

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 (12,3,4,5)
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Ground Weather Radar Station Sacramento, 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.