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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.
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Sunrise 7:19AMSunset 4:52PM Sunday December 15, 2019 11:12 PM PST (07:12 UTC) Moonrise 8:41PMMoonset 10:30AM Illumination 79% Phase: Waning Gibbous; Moon at 19 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- 805 Pm Pst Sun Dec 15 2019
.small craft advisory in effect until 10 pm pst this evening...
Tonight..N winds 10 to 20 kt, diminishing to 5 to 10 kt after midnight. Wind waves 3 to 4 ft. NW swell 8 to 10 ft at 13 seconds.
Mon..SE winds around 5 kt. Wind waves 1 to 2 ft. W swell 6 to 8 ft at 13 seconds.
Mon night..E winds 10 to 20 kt with gusts up to 25 kt. Wind waves 3 to 4 ft. W swell 6 to 8 ft at 13 seconds.
Tue..E winds 15 to 25 kt with gusts up to 30 kt. Wind waves 5 to 6 ft. W swell 6 to 8 ft at 15 seconds. A slight chance of rain.
Tue night..E winds 20 to 25 kt with gusts up to 30 kt. Wind waves 5 to 6 ft. W swell 8 to 10 ft at 17 seconds. A chance of rain.
Wed..E winds 15 to 25 kt with gusts up to 30 kt. Wind waves 5 to 6 ft. W swell 12 to 14 ft at 17 seconds. A chance of rain.
Wed night..S winds up to 10 kt. Wind waves 1 to 2 ft. W swell 12 to 14 ft at 16 seconds. A chance of rain.
Thu..S winds 10 to 20 kt. Wind waves 3 to 4 ft. W swell 8 to 10 ft. A chance of rain.
Fri..SE winds 10 to 20 kt with gusts up to 25 kt. Wind waves 4 to 5 ft. W swell 12 to 14 ft. Rain likely.
PZZ500 805 Pm Pst Sun Dec 15 2019
Synopsis for the central california coast and bays including the Monterey bay..Greater farallones...and cordell bank national marine sanctuaries... Northwest winds will diminish overnight before shifting more north to northeast tomorrow morning and remain generally light to locally moderate. Winds will then increase across the waters by tomorrow night and turn southerly ahead of the next weather system. Gusty southerly winds will then persist through mid week as an upper trough moves through Tuesday night returning showers to the coastal waters. The moderate to large northwest swell that has been effecting the region will continue to subside tomorrow and Tuesday. SWells will then rebuild overnight Tuesday as the upper trough moves through.


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 160549 AFDMTR

Area Forecast Discussion National Weather Service San Francisco Bay Area 949 PM PST Sun Dec 15 2019

SYNOPSIS. Light northerly winds will shift to slightly off shore tonight. With minimal cloud cover and cooler air, cold overnight low temperatures are forecast around the region for Monday morning, which will be the coldest of the week. As high pressure builds dry air returns with warmer temperatures. Unsettled conditions return by midweek bringing the next chance for rain; and potentially again late next weekend.

DISCUSSION. as of 9:20 PM PST Sunday . Forecast is on track as clearing skies and a cold northwest flow aloft will lead to low temperatures in the 30s over the interior and upper 30s to low 40s around the bays. Patchy frost is possible during the early morning hours. Quiet weather is expected Monday and Tuesday with just high clouds streaming over the area. The flow aloft switches to southwest which will allow for a moderation of temperatures Monday night. Highs Monday and Tuesday will be slightly warmer with temperatures in the upper 50s to low 60s.

Most models bring an upper level low through the CWA Tuesday night and Wednesday. The low opens up into a trough as it comes onshore so the highest rainfall amounts will be at the coast and the coastal mountains where up to 1/4 to 1/2 inch is possible. Inland areas will have less rain and some places in the far interior may not see any rain at all. It should also be noted that this is a compact weather system so just a slight deviation from the forecast track would result in the chances of rain being greatly reduced. Because of this the pops are only in the chance category.

After the low/trough moves inland a moist southwesterly flow will develop with warm-frontal rains into northern California and the Pacific Northwest Thursday and Friday. There is a slight chance of rain getting into the North Bay if the rains shift farther south than expected. For the rest of the CWA we could have a similar situation where low-level moisture could bring lots of clouds and local drizzle to the area similar to last week.

Models in decent agreement bringing another shot of rain Saturday night changing to showers on Sunday though rain could begin as early as Saturday afternoon in the North Bay.

Previous discussion . as of 01:44 PM PST Sunday . An upper level ridge is building over the California coastline. This is allowing high pressure to provide clearer skies across the region for what seems like since Thanksgiving. There are still a few lingering isolated showers over the Pacific, but are not forecast to come over land. Winds are light and out of the north and will slowly shift over the course of the day to offshore. The light, dry offshore winds will inhibit any fog in the overnight hours. However, the lack of clouds will promote more cooling allowing for minimum temperatures to reach their lowest for this week. Widespread low-40s to upper 30s are expected around the Bay Area and Central Coast. Isolated areas of the North Bay Valleys, the East Bay Valleys, and Southern Monterey Interior County will be in the mid-30s just above freezing. Patchy frost in these areas may be possible.

The ridge will continue to build on Monday ushering in drier air and providing a warming trend, giving further confidence that Monday's the overnight lows tonight will be the minimum for the week. Seasonal Temperatures on Monday and Tuesday before the return of unsettled weather.

The next upper level trough moves in from the west on Tuesday night, bringing with it a weather system that will bring the next opportunity for rainfall for the region. Rainfall will be light to moderate at times and last through Wednesday morning, with spotty showers lingering over the area after the brunt of the system passes. Compared to what we have seen recently, accumulations will be minimal, with most areas seeing less than a half an inch. However, higher elevations of Marin County and the Santa Cruz Mountains, as well as coastal San Mateo could see up to an inch.

The trough-ridge-trough "rinse, repeat" pattern continues as high pressure tries to build on Thursday. But models are showing the next ridge to be too weak which will allow zonal flow to set up for the end of the work week. With consistent onshore flow drawing moisture in from the ocean, it would not be surprising if the the overcast skies with occasional pop-up showers/drizzle that we saw last week are seen again Thursday and Friday. The next system will approach the coast when the next trough moves in. Models are still disagreeing on timing, though it is looking more and more like a Saturday night into Sunday event. More to come as we get closer and models can better resolve the event.

AVIATION. as of 09:31 PM PST Sunday . For 06Z TAFs. VFR conditions to prevail through the period, aside from possible reduced vis at KSTS tomorrow morning. Current satellite imagery shows high clouds passing overhead at between 15,000-20,000 ft AGL along with patchy lower clouds. This afternoon's breezy winds have subsided with all sites now reporting wind speeds less than 10 kt. Expect light winds to continue overnight before turning offshore by the morning.

Vicinity of KSFO . VFR with passing high clouds a few lower clouds still possible at around 3500 ft. Winds have diminished this evening and should remain less than 10 kt overnight. Winds expected to turn offshore by the morning.

SFO Bridge Approach . Similar to KSFO.

Monterey Bay Terminals . VFR through the period with patchy low clouds near the Peninsula and higher clouds overhead at around 20,000 ft AGL. Winds have eased this evening and will remain light overnight and through at least the morning.

MARINE. as of 09:48 PM PST Sunday . Northwest winds will diminish overnight before shifting more north to northeast tomorrow morning and remain generally light to locally moderate. Winds will then increase across the waters by tomorrow night and turn southerly ahead of the next weather system. Gusty southerly winds will then persist through mid week as an upper trough moves through Tuesday night returning showers to the coastal waters. The moderate to large northwest swell that has been effecting the region will continue to subside tomorrow and Tuesday. Swells will then rebuild overnight Tuesday as the upper trough moves through.

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



PUBLIC FORECAST: W Pi AVIATION: AS MARINE: AS

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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 NNW 12 G 16 55°F1026.2 hPa
PRYC1 - 9415020 - Point Reyes, CA 18 mi60 min 53°F1025.1 hPa
46214 - Point Reyes, CA (029) 34 mi42 min 56°F10 ft
46026 - SAN FRANCISCO - 18NM West of San Francisco, CA 35 mi32 min NNW 12 G 14 53°F 55°F1026.1 hPa
46237 - San Francisco Bar, CA (142) 37 mi42 min 55°F7 ft
TIBC1 - Tiburon Pier, San Francisco Bay, CA 38 mi43 min WNW 1.9 49°F 1026 hPa
RCMC1 - 9414863 - Richmond, CA 38 mi54 min 54°F
PPXC1 - 9414847 - Richmond (Point Potrero), CA 40 mi54 min N 5.1 G 7 49°F 1025.6 hPa
DPXC1 - 9415141 - Davis Point, San Pablo Bay, CA 40 mi54 min SSW 4.1 G 5.1 49°F 1025.1 hPa
FTPC1 - 9414290 - San Francisco, CA 41 mi60 min S 1.9 G 2.9 55°F1025.3 hPa
PXSC1 44 mi54 min 53°F 48°F
PXOC1 - 9414311 - San Francisco (Pier 1), CA 44 mi54 min N 6 G 6 51°F 1024.3 hPa
OBXC1 46 mi60 min 51°F 47°F
OMHC1 - 9414769 - Oakland Middle Harbor Met, CA 46 mi60 min NNE 5.1 G 5.1
OKXC1 - 9414776 - Oakland (Berth 34), CA 46 mi60 min NNE 4.1 G 6 50°F 1025.2 hPa
MZXC1 - 9415102 - Martinez-Amorco CA 48 mi60 min Calm G 1 47°F 53°F1025.3 hPa
UPBC1 48 mi54 min NNW 1 G 1.9
LNDC1 49 mi60 min N 2.9 G 4.1 50°F 1025.1 hPa
AAMC1 - 9414750 - Alameda, CA 49 mi54 min 55°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 mi19 minWNW 49.00 miFair39°F39°F100%1025.4 hPa
Petaluma Municipal Airport, CA20 mi37 minN 010.00 miFair39°F39°F100%1026.1 hPa
Novato / Gnoss Field, CA24 mi17 minN 010.00 miFair43°F42°F100%1026.1 hPa

Link to 5 minute data for KSTS

Wind History from STS (wind in knots)
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Last 24hrCalmCalmCalmCalmCalmE4CalmCalmCalmCalmCalmN3N9N12NW11W10NW9CalmNW3CalmCalmN4NW3NW4
1 day agoN4CalmSW6S3CalmSW3CalmS3CalmS3CalmNW10
G19
N6N5W9W9W9W8W5N6W3CalmW6W5
2 days agoCalmSW3CalmCalmCalmN3CalmCalmCalmCalmNW4E3S4SE3CalmS4S5SW4S3SE4S6W6W6NW4

Tide / Current Tables for Tomales Bay Entrance, California
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Tomales Bay Entrance
Click for Map
Mon -- 03:16 AM PST     4.24 feet High Tide
Mon -- 07:21 AM PST     Sunrise
Mon -- 08:03 AM PST     2.90 feet Low Tide
Mon -- 11:13 AM PST     Moonset
Mon -- 01:34 PM PST     5.12 feet High Tide
Mon -- 04:53 PM PST     Sunset
Mon -- 09:02 PM PST     -0.61 feet Low Tide
Mon -- 09:50 PM PST     Moonrise
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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2.23.23.94.24.13.83.432.933.444.655.14.73.82.71.50.4-0.3-0.6-0.40.3

Tide / Current Tables for Point Reyes, California Current
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Point Reyes
Click for Map
Mon -- 12:13 AM PST     1.12 knots Max Flood
Mon -- 03:50 AM PST     -0.00 knots Slack
Mon -- 06:00 AM PST     -0.68 knots Max Ebb
Mon -- 07:21 AM PST     Sunrise
Mon -- 09:11 AM PST     0.00 knots Slack
Mon -- 11:13 AM PST     Moonset
Mon -- 11:59 AM PST     0.64 knots Max Flood
Mon -- 02:34 PM PST     -0.00 knots Slack
Mon -- 04:53 PM PST     Sunset
Mon -- 06:08 PM PST     -1.38 knots Max Ebb
Mon -- 09:51 PM PST     Moonrise
Mon -- 09:57 PM PST     0.00 knots Slack
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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1.11.10.80.4-0.1-0.5-0.7-0.6-0.3-0.10.20.50.60.50.2-0.2-0.7-1.1-1.4-1.2-0.9-0.500.5

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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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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