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Marine Weather and Tides
Dillon Beach, 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 7:15AMSunset 4:51PM Tuesday December 10, 2019 11:04 PM PST (07:04 UTC) Moonrise 4:05PMMoonset 5:37AM Illumination 100% Phase: Full Moon; Moon at 14 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- 846 Pm Pst Tue Dec 10 2019
.small craft advisory in effect until 3 am pst Wednesday...
Tonight..SE winds 10 to 20 kt with gusts up to 30 kt. Wind waves 3 to 4 ft. W swell 6 to 8 ft at 15 seconds and S around 2 ft at 15 seconds. Rain this evening, then a chance of showers after midnight.
Wed..SE winds 10 to 15 kt. Wind waves 1 to 2 ft. W swell 7 to 8 ft at 15 seconds and S around 2 ft at 15 seconds. A chance of showers.
Wed night..SE winds 10 to 20 kt. Wind waves 1 to 2 ft. W swell 6 to 8 ft at 16 seconds. A chance of rain.
Thu..S winds 5 to 15 kt. Wind waves 1 to 2 ft. W swell 9 to 11 ft at 19 seconds. A chance of rain.
Thu night..NW winds up to 10 kt. Wind waves 1 ft. W swell 13 to 15 ft at 17 seconds. A chance of rain.
Fri..N winds up to 10 kt. Wind waves 1 ft. W swell 13 to 15 ft at 17 seconds. A chance of rain.
Fri night..NW winds 5 to 10 kt. Wind waves 1 ft. W swell 12 to 14 ft at 17 seconds. A chance of rain.
Sat..NW winds 10 to 20 kt. Wind waves 2 to 3 ft. W swell 8 to 10 ft. A chance of rain.
Sun..N winds 5 to 15 kt. Wind waves 1 to 2 ft. NW swell 9 to 11 ft.
PZZ500 846 Pm Pst Tue Dec 10 2019
Synopsis for the central california coast and bays including the Monterey bay..Greater farallones...and cordell bank national marine sanctuaries... A weak frontal system will bring light to moderate rain to the northern waters tonight. Light to moderate southerly winds will then continue through much of the week as a series of frontal systems pass north of the area. Winds shifting to the northwest towards the weekend. A moderate northwest swell will persist before a longer period northwest swell arrives on Thursday. Wave heights will gradually build heading into the coming weekend creating hazardous seas conditions, particularly for smaller vessels.


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 110608 AFDMTR

Area Forecast Discussion National Weather Service San Francisco Bay Area 959 PM PST Tue Dec 10 2019

SYNOPSIS. A moist zonal flow will keep a chance of light rain in the forecast for much of the week, with the best chances across the North Bay. A system will bring another chance of rain and cooler temperatures on Saturday with dry weather returning Sunday and Monday.

DISCUSSION. as of 9:59 PM PST Tuesday . An amplifying, small scale, moderately strong mid level trough is passing quickly to the east over the forecast area this evening. Considering dry air present in the lower to mid levels of the atmosphere per the 00z Oakland sounding, the dynamics attended by marginal at best jet streak winds within the trough produced a tenth to a third of an inch of rain over the North Bay, a few hundredths to two tenths of an inch over the East Bay a tenth of an inch or less over the Santa Cruz mountains as the rain band continues to expand to the south while moving east. The mid level trough passing by this evening has separated from the surface cold front that's still plodding along over the offshore waters and becoming less discernible with time while moving east at about 10 mph per theta-e forecasts. Early evening infrared satellite imagery showed a sharp contrast of cloud cover (upward motion prior to) to no cloud cover (downward motion after) the 500 mb trough axis. Isentropic slantwise flow as would be expected briefly intensified with this trough over the Bay Area. The NAM model had trouble keeping up with rain amounts over the Bay Area, the HRRR model fared a little better forecasting rain amounts, but not by much; it's a good example of the limitations regarding model resolution and small scale, but potent troughs.

For the large scale picture we're locked in with a zonal flow pattern for the foreseeable future. Moist Pacific air in this zonal pattern will bring periodic light rain mainly over northernmost portions of the cwa through the week. For additional information please see the previous forecast discussion.

PREV DISCUSSION. as of 1:55 PM PST Tuesday . A moist zonal flow will develop Wednesday through the end of the week. A subtle disturbance in the flow and warm advection will bring a chance of rain mainly north of the Golden Gate on Wednesday night and Thursday. Moist onshore flow will continue into Friday with the best chance of light rain continuing across the North Bay. Rainfall through the end of the week will be light with minimal impacts. A slightly warmer airmass will also arrive with highs on Thursday in the lower to middle 60s. The moist flow will also provide for mild overnight lows, mainly in the upper 40s to lower 50s. The moist zonal flow will bring mostly cloudy skies through the week.

A shortwave trough will then move through northern California on Saturday. Currently, most of the precipitation with this system is forecast to remain to our north. The trough will bring a cooler airmass to the region on Saturday with highs dropping back into the 50s. A cool, drier northwesterly flow will develop on Sunday followed by upper level ridging early next week. A progressive pattern still looks to persist into next week, but the Euro ensemble has trended towards less amplified troughing.

AVIATION. as of 7:00 PM PST Tuesday . Approaching frontal system will bring low level moisture into the area tonight along with some light rain. MVFR cigs have appeared at STS and is working its way into SFO Bay Area. Winds will be light and generally out of the southeast. Models show low level moisture lingering through the day on Wednesday so it may remain MVFR.

Vicinity of KSFO . As precip band approaches . cigs are expected to drop gradually lower into MVFR with bases 4000-5000 ft lowering to 2000-3000 ft after 06Z. Periods of light rain through 12Z. MVFR cigs persisting through the day Wednesday. Light easterly winds becoming more southeast tonight.

SFO Bridge Approach . Similar to KSFO.

Monterey Bay Terminals . Low clouds off the coast of Carmel could spread into MRY after 04Z and SNS after 06Z. Low confidence on timing as it could come in later. Southeast winds around 5-10 kt with except brief west winds possible this afternoon and early evening.

MARINE. as of 9:03 PM PST Tuesday . A weak frontal system will bring light to moderate rain to the northern waters tonight. Light to moderate southerly winds will then continue through much of the week as a series of frontal systems pass north of the area. Winds shifting to the northwest towards the weekend. A moderate northwest swell will persist before a longer period northwest swell arrives on Thursday. Wave heights will gradually build heading into the coming weekend creating hazardous seas conditions, particularly for smaller vessels.

MTR WATCHES/WARNINGS/ADVISORIES. Tngt. SCA . Pt Arena to Pt Reyes 0-10 nm until 3 AM SCA . Pt Arena to Pigeon Pt 10-60 nm until 3 AM



PUBLIC FORECAST: Canepa/ST AVIATION: W Pi MARINE: W Pi

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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 mi24 min SE 18 G 21 53°F 55°F1023.1 hPa52°F
PRYC1 - 9415020 - Point Reyes, CA 18 mi52 min 54°F1023.1 hPa
46214 - Point Reyes, CA (029) 34 mi34 min 57°F6 ft
46026 - SAN FRANCISCO - 18NM West of San Francisco, CA 35 mi24 min SSE 12 G 14 54°F 56°F1024 hPa
46237 - San Francisco Bar, CA (142) 37 mi34 min 54°F3 ft
TIBC1 - Tiburon Pier, San Francisco Bay, CA 38 mi29 min Calm 52°F 1024 hPa
RCMC1 - 9414863 - Richmond, CA 38 mi46 min 55°F
PPXC1 - 9414847 - Richmond (Point Potrero), CA 40 mi46 min Calm G 1.9 54°F 1024.2 hPa
DPXC1 - 9415141 - Davis Point, San Pablo Bay, CA 40 mi46 min E 8 G 8.9 53°F 1023.8 hPa
FTPC1 - 9414290 - San Francisco, CA 41 mi52 min WNW 1 G 1.9 53°F 54°F1024 hPa
PXSC1 44 mi46 min 55°F 55°F
PXOC1 - 9414311 - San Francisco (Pier 1), CA 44 mi46 min E 4.1 G 4.1 53°F 1022.8 hPa
OBXC1 46 mi46 min 53°F 53°F
OMHC1 - 9414769 - Oakland Middle Harbor Met, CA 46 mi52 min E 1.9 G 1.9
OKXC1 - 9414776 - Oakland (Berth 34), CA 46 mi46 min ESE 1.9 G 2.9 53°F 1023.9 hPa
MZXC1 - 9415102 - Martinez-Amorco CA 48 mi52 min NE 5.1 G 6 52°F 54°F1024.1 hPa
UPBC1 48 mi46 min ENE 7 G 8.9
LNDC1 49 mi46 min Calm G 1 54°F 1023.8 hPa
AAMC1 - 9414750 - Alameda, CA 49 mi52 min Calm G 1.9 53°F 55°F1024 hPa

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 mi71 minSSE 42.00 miLight Rain Fog/Mist51°F51°F100%1023 hPa
Petaluma Municipal Airport, CA20 mi69 minE 74.00 miFog/Mist52°F51°F100%1024 hPa
Novato / Gnoss Field, CA24 mi69 minN 03.00 miFog/Mist52°F51°F100%1024 hPa

Link to 5 minute data for KO69

Wind History from O69 (wind in knots)
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Last 24hrCalmE4CalmCalmCalmCalmS443Calm35Calm4
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1 day agoCalmCalmCalmCalm4CalmNW3NW3CalmNW3N5CalmCalmCalmCalmN4CalmNW3CalmW5W6W5Calm--
2 days agoCalmCalmCalmCalmCalmCalmCalmCalmCalmSW3CalmCalmCalmNW34CalmW3W6NW3W6CalmCalmCalmCalm

Tide / Current Tables for Tomales Bay entrance, California
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Tomales Bay Entrance
Click for Map
Wed -- 04:00 AM PST     2.40 feet Low Tide
Wed -- 06:40 AM PST     Moonset
Wed -- 07:18 AM PST     Sunrise
Wed -- 09:59 AM PST     5.65 feet High Tide
Wed -- 04:46 PM PST     Moonrise
Wed -- 04:51 PM PST     Sunset
Wed -- 05:22 PM PST     -0.72 feet Low Tide
Wed -- 09:14 PM PST     Full Moon
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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3.73.42.92.62.42.63.13.94.75.45.75.44.63.42.10.8-0.2-0.7-0.6-012.133.7

Tide / Current Tables for Point Reyes, California Current
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Point Reyes
Click for Map
Wed -- 01:59 AM PST     -0.68 knots Max Ebb
Wed -- 05:08 AM PST     0.00 knots Slack
Wed -- 06:39 AM PST     Moonset
Wed -- 07:17 AM PST     Sunrise
Wed -- 08:02 AM PST     0.79 knots Max Flood
Wed -- 10:49 AM PST     -0.00 knots Slack
Wed -- 02:11 PM PST     -1.46 knots Max Ebb
Wed -- 04:47 PM PST     Moonrise
Wed -- 04:52 PM PST     Sunset
Wed -- 06:08 PM PST     0.00 knots Slack
Wed -- 09:09 PM PST     1.09 knots Max Flood
Wed -- 09:14 PM PST     Full Moon
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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-0.1-0.5-0.7-0.6-0.3-00.30.60.80.70.4-0.1-0.7-1.2-1.5-1.4-1-0.6-0.10.50.91.110.7

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 Sacramento, CA
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