Monday, December11, 2017 L-36.com


Marine Weather and Tides
Bolinas, CA

Version 3.4
What's New / NOTES
6/25/2017 - NOAA is having a major issue that impact the 7 day forecast load times. Many users are reporting problems. The issue has been reported.
5/23/2017 - Worked with NOAA again to speed up the 7 day forecast load times. Thanks to them for being responsive.
5/19/2016 - There were issues with the 3 day airport observation history. I switched to another data source. Let me know if you see any issues with the data feeds.

Sunrise 7:13AMSunset 4:53PM Sunday December 10, 2017 9:47 PM PST (05:47 UTC) Moonrise 12:00AMMoonset 12:56PM Illumination 47% Phase: Third Quarter Moon; Moon at 22 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 Point Reyes To Pigeon Point To 10 Nm- 853 Pm Pst Sun Dec 10 2017
Tonight..E winds 10 to 20 kt. Wind waves 2 to 4 ft. W swell 3 to 4 ft at 17 seconds and sw 3 ft at 16 seconds.
Mon..NE winds 10 to 20 kt. Wind waves 2 to 4 ft. W swell 3 to 5 ft at 15 seconds and sw 3 ft at 15 seconds.
Mon night..NE winds 5 to 15 kt. Wind waves 1 to 3 ft. W swell 4 to 6 ft at 14 seconds and S 3 ft at 15 seconds.
Tue..N winds 5 to 15 kt. Wind waves 1 to 3 ft. W swell 5 to 7 ft at 13 seconds.
Tue night..NW winds 5 to 15 kt. Wind waves 1 to 3 ft. W swell 5 to 7 ft at 13 seconds.
Wed..NW winds 5 to 15 kt. Wind waves 1 to 3 ft. W swell 4 to 6 ft.
Thu..NW winds 10 kt. Wind waves 2 ft or less. W swell 6 to 8 ft.
Fri..NW winds 15 to 25 kt. Wind waves 3 to 5 ft. W swell 6 to 8 ft...shifting to the nw 7 to 9 ft.
...san francisco bar/fourfathom bank forecast..... In the deep water channel...combined seas 3 to 5 ft at 12...increasing to 17 seconds overnight. Across the bar...combined seas 4 to 6 ft at 12 seconds...increasing to 17 seconds overnight. Maximum ebb current of 1.1 knots at 08:54 pm Sunday and 1.2 knots at 11:06 am Monday.
PZZ500 853 Pm Pst Sun Dec 10 2017
Synopsis for the central california coast and bays including the Monterey bay..Greater farallones...and cordell bank national marine sanctuaries... A strong stationary high pressure ridge over the west coast will keep winds over the bays and ocean relatively light through the first half of the upcoming week. A longer period west to northwest swell will arrive overnight tonight and will continue through the day on Monday.

7 Day Forecast for Marine Location Near Bolinas, CA
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location: 37.67, -123.15     debug


Area Discussion for - San Francisco/Monterey Bay Area, CA
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Fxus66 kmtr 110453
afdmtr
area forecast discussion
national weather service san francisco bay area
853 pm pst Sun dec 10 2017

Synopsis High pressure will remain over the west through most
of next week resulting in continued dry conditions. Daytime highs
will be warmer than normal and nights will be seasonably cool.

Discussion As of 9:00 pm pst Sunday... Upper level high is over
northern nevada this evening. Strong 1045 mb surface high
pressure over the great basin continues to dominate bringing dry
offshore flow to the area. This brought record high temperatures
around the south bay and coastal areas today with records set at
san jose... Salinas... And half moon bay and tied at monterey.

Nights will continue to be cool especially in the valleys where
patchy fog may form in wind-protected areas.

The upper high will get pushed slightly southeast as a weak upper
level shortwave approaches the british columbia coast but will
keep its hold over our district through much of the coming week.

The surface high will slowly weaken over the next couple of days
but pressure gradients will still be offshore until Tuesday when
pressures between the coastal waters and inland areas equalize. By
then we should start to get a light seabreeze going. Daytime
temperatures are not going to change much this week with the
upper high still around. But nighttime temperatures will start to
moderate and there should be a little more humidity after
Tuesday.

Medium range models are indicating the ridge will flatten late in
the week as a weather system moves into the pacific northwest but
rain will remain well north of the district. In fact by next
weekend high pressure rebuilds off the coast and surface high
pressure builds into oregon bringing another round of offshore
flow.

Beyond that the 12z run of the ECMWF seems to be coming into
better agreement with the GFS in showing the ridge amplifying over
alaska by the 20th and a trough moving in to take its place over
the west coast with maybe even some precipitation for northern
california.

Aviation As of 3:37 pm pst Sunday for 00z tafs. No major
updates from previous TAF package. Strong high pressure will
continue over the western conus, resulting inVFR conditions
through the forecast period. Kept fog in the TAF at ksts late
tonight, into Monday morning. Generally light winds expected
overnight across the district.

High confidence.

Vicinity of ksfo...VFR. Light offshore winds expected through the
forecast period.

Sfo bridge approach... Similar to ksfo.

Monterey bay terminals...VFR. Generally light winds overnight,
though breezy east southeast winds are expected at ksns overnight
tonight and Monday morning.

Marine As of 3:00 pm pst Sunday... Locally breezy conditions
will continue overnight along coastal gaps as high pressure
remains parked over the west coast. A longer period west to
northwest swell will arrive later tonight and will continue into
Monday.

Mtr watches warnings advisories
Tngt Sca... Pt reyes to pigeon pt 0-10 nm until 9 pm
public forecast: W pi
aviation: bam
marine: rowe
visit us at

Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
46026 - SAN FRANCISCO - 18NM West of San Francisco, CA 17 mi57 min E 14 G 18 58°F 55°F5 ft1022.1 hPa (+1.1)
PRYC1 - 9415020 - Point Reyes, CA 24 mi47 min W 5.1 G 5.1 56°F1021.9 hPa (+0.9)
46214 - Point Reyes, CA (029) 26 mi47 min 58°F5 ft
46012 - HALF MOON BAY - 24NM South Southwest of San Francisco, CA 26 mi57 min NE 7.8 G 7.8 58°F 56°F5 ft1021.4 hPa (+1.0)
46237 - San Francisco Bar, CA (142) 28 mi47 min 54°F4 ft
FTPC1 - 9414290 - San Francisco, CA 37 mi47 min N 11 G 13 60°F 54°F1023.6 hPa (+1.1)
46013 - Bodega Bay - 48NM North Northwest of San Francisco, CA 40 mi37 min E 14 G 18 56°F 55°F1022.7 hPa46°F
TIBC1 - Tiburon Pier, San Francisco Bay, CA 40 mi43 min NW 5.1 58°F 1024 hPa
PXSC1 41 mi47 min 60°F 38°F
RCMC1 - 9414863 - Richmond, CA 43 mi47 min NNW 2.9 G 6 61°F 55°F1023.4 hPa (+1.1)
OKXC1 - 9414776 - Oakland (Berth 34), CA 44 mi47 min SW 1.9 G 2.9 55°F 1023.5 hPa (+1.2)
OBXC1 44 mi53 min 56°F 46°F
OMHC1 - 9414769 - Oakland Middle Harbor Met, CA 44 mi47 min S 5.1 G 5.1
PPXC1 - 9414847 - Richmond (Point Potrero), CA 45 mi47 min NNE 4.1 G 5.1 63°F 1023.8 hPa (+1.0)
AAMC1 - 9414750 - Alameda, CA 46 mi47 min S 1 G 1.9 56°F 55°F1023.6 hPa (+1.2)
LNDC1 47 mi47 min SW 1.9 G 5.1 56°F 1023.4 hPa

Wind History for Point Reyes, CA
(wind in knots)    EDIT      (on/off)   Help
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
San Francisco, San Francisco International Airport, CA42 mi51 minN 010.00 miPartly Cloudy55°F37°F51%1023.3 hPa

Wind History from SFO (wind in knots)
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Last 24hrSE4SE4SE4SE4S3CalmS3SW3CalmSE4SE5SE6SE6E4E5NE3CalmN4CalmE3SE4SE3S4Calm
1 day agoCalmCalmCalmCalmSW3S3CalmCalmCalmCalmS3CalmE4CalmN4CalmCalmCalmCalmSE4E7E9SE5E5
2 days agoCalmE5CalmNE3SW33CalmSW4S4S3S3CalmE3N4CalmCalmCalmNE3CalmS3S5CalmSE4Calm

Tide / Current Tables for Southeast Farallon Island, California
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Southeast Farallon Island
Click for Map
Mon -- 12:57 AM PST     Moonrise
Mon -- 05:58 AM PST     5.54 feet High Tide
Mon -- 07:17 AM PST     Sunrise
Mon -- 12:30 PM PST     1.51 feet Low Tide
Mon -- 01:27 PM PST     Moonset
Mon -- 04:53 PM PST     Sunset
Mon -- 06:04 PM PST     4.01 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
0.91.52.43.54.55.35.55.34.63.62.71.91.61.61.92.53.23.843.93.42.71.91.4

Tide / Current Tables for Point Reyes, California Current
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Point Reyes
Click for Map
Mon -- 12:39 AM PST     0.00 knots Slack
Mon -- 12:57 AM PST     Moonrise
Mon -- 03:51 AM PST     1.00 knots Max Flood
Mon -- 06:54 AM PST     -0.00 knots Slack
Mon -- 07:18 AM PST     Sunrise
Mon -- 09:53 AM PST     -0.95 knots Max Ebb
Mon -- 01:27 PM PST     Moonset
Mon -- 01:39 PM PST     0.00 knots Slack
Mon -- 04:32 PM PST     0.74 knots Max Flood
Mon -- 04:52 PM PST     Sunset
Mon -- 07:12 PM PST     -0.00 knots Slack
Mon -- 09:56 PM PST     -0.84 knots Max Ebb
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
-0.30.20.60.910.90.5-0-0.6-0.9-0.9-0.9-0.7-0.30.20.50.70.70.50.1-0.4-0.8-0.8-0.8

Weather Map and Satellite Images
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Weather Map
wmap_P
IR Satellite Image from GEOS
west_satellite

GOES Local Image of CentralWestCoast    EDIT
Geos

Wind Forecast for San Francisco/Monterey Bay Area, CA (0,6,7,8)
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Ground Weather Radar Station San Francisco Bay Area, CA
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weather_mapweather_map weather_map

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Disclaimer:
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 numerious 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.