Thursday, January23, 2020
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Marine Weather and Tides
Point Reyes Station, 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 7:20AMSunset 5:24PM Thursday January 23, 2020 3:57 AM PST (11:57 UTC) Moonrise 6:39AMMoonset 4:23PM Illumination 3% Phase: Waning Crescent; Moon at 28 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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PZZ545 Coastal Waters From Point Reyes To Pigeon Point California Out To 10 Nm- 237 Am Pst Thu Jan 23 2020
Today..NE winds 5 to 15 kt, becoming nw this afternoon. Wind waves 1 to 2 ft. W swell 4 to 6 ft at 12 seconds.
Tonight..NW winds 5 to 10 kt. Wind waves 1 ft. W swell 5 to 7 ft at 13 seconds and W 2 to 3 ft at 21 seconds.
Fri..NW winds 5 to 10 kt. Wind waves 1 ft. W swell 6 to 8 ft at 13 seconds and W 5 to 7 ft at 21 seconds.
Fri night..NW winds up to 10 kt. Wind waves 1 ft. W swell 9 to 11 ft at 18 seconds. A slight chance of rain.
Sat..SW winds up to 10 kt. Wind waves 1 ft. W swell 8 to 10 ft at 16 seconds. A slight chance of rain.
Sat night..S winds 5 to 10 kt. Wind waves 1 to 2 ft. W swell 7 to 9 ft at 15 seconds. Rain likely.
Sun..NW winds up to 10 kt. Wind waves 1 ft. W swell 6 to 8 ft.
Mon..W winds up to 10 kt. Wind waves 1 ft. W swell 11 to 13 ft.
...san francisco bar/fourfathom bank forecast..... In the deep water channel...seas 6 to 8 ft with a dominant period of 13 seconds. Across the bar...seas 7 to 9 ft with a dominant period of 13 seconds. Maximum ebb current of 1.7 kt at 03:07 am Thursday and 3.3 kt at 03:13 pm Thursday.
PZZ500 237 Am Pst Thu Jan 23 2020
Synopsis for the central california coast and bays including the Monterey bay..Greater farallones...and cordell bank national marine sanctuaries... Light winds and diminishing seas through the day. Winds will generally be offshore and locally breezy near coastal gaps during the afternoon. A long period wnw swell will begin to move into the waters later today, peaking on Friday and Saturday. A coastal jet with northerly winds will develop along the big sur coast by Friday afternoon, generating small craft advisory winds there. The next storm approaches later Saturday into Sunday with increasing southerly winds followed by another large northwest swell behind the front Sunday into Monday.


7 Day Forecast for Marine Location Near Point Reyes Station, CA
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location: 38.06, -122.82     debug


Area Discussion for - San Francisco/Monterey Bay Area, CA
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FXUS66 KMTR 231141 AFDMTR

Area Forecast Discussion National Weather Service San Francisco Bay Area 341 AM PST Thu Jan 23 2020

SYNOPSIS. Mainly dry weather conditions along with a gradual warming trend is expected through Friday. A weak storm system moving into Northern California will bring a chance of precipitation to the region this upcoming weekend.

DISCUSSION. as of 3:24 AM PST Thursday . Longwave pattern depicts an upper level ridge over California and much of the West Coast. Upstream from the ridge is a trough of low pressure moving eastward. Satellite imagery reveals widespread cirrus cloud spilling over the ridge thanks to the upstream trough. Of greater significance to the Bay Area is the lingering low level moisture under the ridge resulting in fog and patchy low clouds. Fog coverage is greatest and most dense across the San Joaquin Valley, Southern Sacramento Valley and inching westward into Delta/East Bay Valleys. Fog is also being reported across other interior valleys around the Bay Area, but just not as dense. Fog will be slow to burn off this morning given the high clouds overhead. Big impact will be to motorists during the morning commute.

Once the fog burns off, filtered sunshine with a ridge of high pressure will result in another mild day. Highs will be a few degrees above normal with more locations experiencing temps in the 60s today. Mostly dry conditions will prevail today and Friday. The exception will be far North Bay where the tail end of a weak frontal boundary may bring brief showers late Thursday into Friday. If showers do develop rainfall amounts will be very light.

The upper level ridge will briefly flatten with the passing of the weak boundary, but rebuild Friday into Saturday. Saturday will be another mild day across the Bay Area. Rain chances will return over the weekend as a slightly stronger frontal boundary moves through the region. Rain chances initially return over the North Bay early Saturday, before slowly moving southward by Sunday. Even with the rain chances this weekend it does not look like a washout. Rainfall amounts will generally be a few hundredths to possibly one half inch in the North Bay. Snow levels will be high so it will all be liquid around the Bay Area. Even with the higher snow levels temperatures will drop from Saturday to Sunday with upper 50s to lower 60s.

By early next week ridging rebuilds over the region shifting the storm track farther north again. Despite the ridging the tail end of a few storms may bring low end chances for showers across the North Bay at times next week.

AVIATION. as of 03:45 AM PST Wednesday . For 12z TAFs. Satellite imagery shows mid to high level moisture overrunning the weak ridge over California this morning. At the same time, it shows the westward migration of tule fog in the Central Valley towards the Bay Area and Central Coast. Of these two features, the westward migration of the fog warrants the closest watch as it has already brought intermittent patchy dense fog to KLVK and other terminals, and is expected to continue to do so into the morning. The high clouds are also expected to thicken up at or around 10000-15000 feet AGL thru the morning before thinning and lowering by the afternoon. Winds generally light offshore through the morning to early afternoon, turning light onshore near the coast by the mid to late afternoon. Ceilings will continue to lower and thicken up by tonight into tomorrow morning.

Vicinity of KSFO . Light offshore flow thru morning and possibly into the early afternoon, then onshore flow 06-09kt by the mid to late afternoon. Expecting predominately VFR cigs/visby but with low confidence of a risk of patchy fog/low stratus advecting in from the ENE due to light offshore flow and presence of fog upwind. Otherwise, expect high clouds to increase through the morning before lowering/tapering off this afternoon and thickening/ lowering further by tonight/tomorrow morning.

SFO Bridge Approach . Similar to KSFO.

Monterey Bay Terminals . Comms issues continue with Salinas ASOS and FAA lines continue this morning. Satellite imagery shows the development of patchy fog/low stratus deck over Seaside/Marina area/to northeast of KMRY so would not be surprised to see it drift towards KMRY given easterly flow there. Otherwise, VFR with increasing high clouds through the morning.

MARINE. as of 03:32 AM PST Thursday . Light winds and diminishing seas through the day. Winds will generally be offshore and locally breezy near coastal gaps during the afternoon. A long period WNW swell will begin to move into the waters later today, peaking on Friday and Saturday. A coastal jet with northerly winds will develop along the Big Sur coast by Friday afternoon, generating small craft advisory winds there. The next storm approaches later Saturday into Sunday with increasing southerly winds followed by another large northwest swell behind the front Sunday into Monday.

MTR WATCHES/WARNINGS/ADVISORIES. Tday. NONE.



PUBLIC FORECAST: MM AVIATION: DRP MARINE: DRP

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Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
PRYC1 - 9415020 - Point Reyes, CA 9 mi58 min 53°F1023.5 hPa (-1.0)
46026 - SAN FRANCISCO - 18NM West of San Francisco, CA 21 mi38 min ENE 14 G 18 55°F 54°F1024.2 hPa
46237 - San Francisco Bar, CA (142) 21 mi58 min 53°F6 ft
TIBC1 - Tiburon Pier, San Francisco Bay, CA 23 mi59 min WNW 4.1 50°F 1025 hPa
RCMC1 - 9414863 - Richmond, CA 24 mi64 min 51°F 52°F1024.1 hPa
PPXC1 - 9414847 - Richmond (Point Potrero), CA 26 mi64 min 51°F 1024.6 hPa
FTPC1 - 9414290 - San Francisco, CA 26 mi64 min 53°F 53°F1024.5 hPa
PXSC1 29 mi64 min 53°F 51°F
46013 - Bodega Bay - 48NM North Northwest of San Francisco, CA 29 mi38 min ENE 5.8 G 7.8 54°F1024.3 hPa
DPXC1 - 9415141 - Davis Point, San Pablo Bay, CA 29 mi64 min 50°F 1024.3 hPa
PXOC1 - 9414311 - San Francisco (Pier 1), CA 29 mi64 min 51°F 1023.5 hPa
OKXC1 - 9414776 - Oakland (Berth 34), CA 31 mi58 min 51°F 1024.4 hPa (-0.5)
OBXC1 31 mi58 min 52°F 52°F
OMHC1 - 9414769 - Oakland Middle Harbor Met, CA 32 mi88 min NW 7 G 8
AAMC1 - 9414750 - Alameda, CA 34 mi64 min 51°F 52°F1024.2 hPa
LNDC1 34 mi58 min 51°F 1024.2 hPa (-0.6)
46214 - Point Reyes, CA (029) 35 mi58 min 55°F9 ft
UPBC1 37 mi88 min ESE 5.1 G 7
MZXC1 - 9415102 - Martinez-Amorco CA 37 mi58 min 48°F 51°F1024.7 hPa (-0.6)
PCOC1 - 9415144 - Port Chicago, CA 41 mi58 min 48°F 49°F1024.4 hPa (-0.7)
SFXC1 - San Francisco Bay Reserve, CA 43 mi73 min Calm
PSBC1 - 9415115 - Pittsburg (Suisun Bay), CA 49 mi58 min 47°F 1024.8 hPa (-0.6)
46012 - HALF MOON BAY - 24NM South Southwest of San Francisco, CA 49 mi38 min N 7.8 G 9.7 54°F 54°F1023.8 hPa51°F

Wind History for Point Reyes, CA
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure

Link to 5 minute data for KDVO

Wind History from DVO (wind in knots)
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Last 24hrCalmCalmCalmCalmNW3N4N63CalmCalm4CalmSE4W4CalmCalmCalmCalmS3CalmS3CalmCalmCalm
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S12SE10SE7SE7SE5SE5S6CalmCalmN5CalmCalmCalmCalmCalm
2 days agoS5SE8SW4CalmS8S5SE4SE6E5SE5CalmCalmCalmS3N3CalmCalmN3CalmCalmCalmCalmCalmCalm

Tide / Current Tables for Inverness, Tomales Bay, California
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Inverness
Click for Map
Thu -- 12:05 AM PST     4.36 feet High Tide
Thu -- 05:15 AM PST     2.73 feet Low Tide
Thu -- 06:39 AM PST     Moonrise
Thu -- 07:22 AM PST     Sunrise
Thu -- 10:35 AM PST     5.93 feet High Tide
Thu -- 04:23 PM PST     Moonset
Thu -- 05:23 PM PST     Sunset
Thu -- 06:13 PM PST     -1.03 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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4.44.23.83.32.92.72.93.54.35.25.85.95.44.431.50.2-0.7-1-0.8-0.112.23.4

Tide / Current Tables for Point Reyes, California Current
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Point Reyes
Click for Map
Thu -- 01:50 AM PST     -0.61 knots Max Ebb
Thu -- 04:52 AM PST     0.00 knots Slack
Thu -- 06:39 AM PST     Moonrise
Thu -- 07:23 AM PST     Sunrise
Thu -- 07:43 AM PST     0.83 knots Max Flood
Thu -- 10:28 AM PST     -0.00 knots Slack
Thu -- 01:50 PM PST     -1.49 knots Max Ebb
Thu -- 04:24 PM PST     Moonset
Thu -- 05:24 PM PST     Sunset
Thu -- 05:51 PM PST     0.00 knots Slack
Thu -- 09:01 PM PST     1.18 knots Max Flood
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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-0.2-0.5-0.6-0.5-0.30.10.50.80.80.70.3-0.3-1-1.4-1.5-1.4-1-0.50.10.71.11.21.10.7

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 (6,6,7,8)
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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.