Saturday, November18, 2017 L-36.com


Marine Weather and Tides
Stinson Beach, 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 6:54AMSunset 4:57PM Saturday November 18, 2017 5:22 PM PST (01:22 UTC) Moonrise 6:55AMMoonset 5:34PM Illumination 0% Phase: New Moon; Moon at 0 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- 232 Pm Pst Sat Nov 18 2017
Tonight..N winds 5 to 15 kt. Wind waves 1 to 3 ft. NW swell 3 to 4 ft at 12 seconds.
Sun..NW winds 10 kt. Wind waves 2 ft or less. NW swell 3 ft at 13 seconds.
Sun night..SW winds 10 kt. Wind waves 2 ft or less. NW swell 3 ft at 14 seconds. Slight chance of rain after midnight.
Mon..SE winds 10 kt. Wind waves 2 ft or less. W swell 3 ft at 12 seconds. Chance of rain.
Mon night..N winds 5 to 15 kt. Wind waves 1 to 3 ft. NW swell 3 to 4 ft at 12 seconds. Slight chance of rain in the evening.
Tue..NE winds 10 to 20 kt. Wind waves 2 to 4 ft. W swell 3 to 4 ft...becoming 3 to 5 ft.
Wed..N winds 10 kt. Wind waves 2 ft or less. W swell 5 to 7 ft.
Thanksgiving day..NW winds 5 to 15 kt. Wind waves 1 to 3 ft. W swell 4 to 6 ft.
...san francisco bar/fourfathom bank forecast..... In the deep water channel...combined seas 2 to 4 ft with a dominant swell period of 10 seconds. Across the bar...combined seas 3 to 5 ft with a dominant swell period of 10 seconds. Maximum ebb current of 1.9 knots at 03:48 pm Saturday and 0.9 knots at 04:24 am Sunday.
PZZ500 232 Pm Pst Sat Nov 18 2017
Synopsis for the central california coast and bays including the Monterey bay..Greater farallones...and cordell bank national marine sanctuaries... High pressure just off the coast of central california will continue to generate light northerly winds through Sunday evening. Winds are then forecast to switch out of the south by late Sunday night or early Monday ahead of a frontal boundary. Winds over the southern waters will remain light to moderate out of the northwest. Light to moderate seas will continue through the weekend.

7 Day Forecast for Marine Location Near Stinson Beach CDP, CA
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location: 37.85, -122.67     debug


Area Discussion for - San Francisco/Monterey Bay Area, CA
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Fxus66 kmtr 182357
afdmtr
area forecast discussion
national weather service san francisco bay area
357 pm pst Sat nov 18 2017

Synopsis Dry and seasonably cool weather can be expected
through the weekend. The next system will bring rain chances early
Monday, mainly across the north bay. Additional rainfall is
possible at times in the north bay for much of next week, but most
of our area will likely see dry and warm weather.

Discussion As of 1:15 pm pst Saturday... Satellite imagery
shows mostly clear skies with a few passing high clouds over
california this afternoon. The mostly clear skies and cold air
advection aloft allowed temperatures to cool into the upper 20s to
mid 40s throughout the region, with the coolest locations
farthest inland away from the moderating influences of the
pacific san francisco bay waters. Temperatures this afternoon are
running near to slightly below seasonal readings for this time of
the year, with reports in the upper 50s to mid 60s. A few to
several degrees of additional warming are possible through the
remainder of the daylight hours today. Seasonal temperatures and
dry conditions are forecast to continue through the remainder of
weekend as high pressure builds offshore of baja, southern and
central california.

This building 591dm high pressure ridge will partially
deflect delay a weak trough descending from the gulf of alaska
late this weekend. Over the last 24-36 hours, forecast models
have been trending towards lower precipitation amounts for our
area as the aforementioned ridge deflects the approaching trough
farther out of area each run. Latest model data shows the north
bay picking up the most rain from this storm system, as per the
norm, but amounts are coming in lower and lower. The latest storm
total precipitation model consensus brings in amounts of just

05- 25 for the north bay (locally up to .33 at the wettest spots),
with areas south of the golden gate lucky to see a few
hundredths. Heavier precipitation is expected farther north, from
mendocino county and beyond, as the ridge dominates from the san
francisco bay area and southward.

Previous model runs also showed a secondary, weak system mid to
late next week, however, given the push towards a stronger ridge,
this system is now expected to be even weaker. Instead, it looks
like we will see a dirty ridge type of scenario, with moisture
riding over the top of the ridge as long as it exist.

Precipitation will lingering along the northern periphery of the
ridge off and on through the upcoming week, occasionally bringing
light rain to the northern portions of napa and sonoma counties.

This ridge will continue to be the most prominent feature in our
regional weather until next weekend, when it begins to wane and
shift downstream. At the same time, forecast models show a well
organized upper low in the gulf of alaska, which could bring
widespread precipitation Sunday or Monday, nov26-27. Models do
differ on the strength of the upper low, with the euro showing
500mb heights at 5150m and the GFS at 5260m, as well as the
timing, with the GFS sluggish and wetter and the euro much more
progressive and drier. Be sure to stay tuned as next weekends
storm system comes into better focus.

Aviation As of 3:57 pm pst Saturday... The air mass is mainly
dry and stable supportingVFR for the 00z TAF cycle. Few-sct
cirrus clouds tonight then high clouds thicken by late morning
Sunday.

Vicinity of ksfo...VFR. Light wind tonight and Sunday.

Sfo bridge approach...VFR.

Monterey bay terminals...VFR. Wind becoming SE 5-10 knots tonight
and Sunday morning then light W Sunday afternoon and evening.

Marine As of 3:49 pm pst Saturday... High pressure just off the
coast of central california will continue to generate light northerly
winds through Sunday evening. Winds are then forecast to switch out
of the south by late Sunday night or early Monday ahead of a frontal
boundary. Winds over the southern waters will remain light to moderate
out of the northwest. Light to moderate seas will continue through
the weekend.

Mtr watches warnings advisories
Tngt None.

Public forecast: drp
aviation: canepa
marine: bam
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Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
46237 - San Francisco Bar, CA (142) 5 mi52 min 57°F3 ft
46026 - SAN FRANCISCO - 18NM West of San Francisco, CA 11 mi92 min NW 5.8 G 7.8 56°F 58°F4 ft1021.3 hPa (-1.1)
TIBC1 - Tiburon Pier, San Francisco Bay, CA 12 mi65 min W 1.9 57°F 1021 hPa
46012 - HALF MOON BAY - 24NM South Southwest of San Francisco, CA 35 mi92 min NNW 9.7 G 12 57°F 59°F5 ft1020.7 hPa (-0.9)
SFXC1 - San Francisco Bay Reserve, CA 42 mi97 min E 5.1 64°F 1021 hPa32°F
46214 - Point Reyes, CA (029) 43 mi52 min 60°F4 ft
46013 - Bodega Bay - 48NM North Northwest of San Francisco, CA 43 mi42 min NW 5.8 G 7.8 55°F 57°F1021.2 hPa49°F

Wind History for San Francisco, CA
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Novato / Gnoss Field, CA21 mi27 minN 010.00 miFair55°F39°F55%1021 hPa
San Francisco, San Francisco International Airport, CA23 mi26 minW 710.00 miMostly Cloudy57°F41°F55%1020.6 hPa

Wind History from DVO (wind in knots)
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Last 24hrCalm--SE4S3CalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmN3CalmE4443CalmCalm
1 day agoCalmCalmCalmCalmNW14
G19
W12W10NW11W10W7
G12
CalmCalmCalmCalmCalmN5N6NW9CalmCalmCalmN5N5NW4
2 days agoSE8S6
G14
SE55SE6
G12
S7
G20
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G14
N5N4W83CalmCalmCalmCalmCalmCalmSW4SW4CalmSW4SW6SW8W7

Tide / Current Tables for Bolinas Lagoon, California
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Bolinas Lagoon
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Sat -- 03:42 AM PST     New Moon
Sat -- 05:15 AM PST     1.34 feet Low Tide
Sat -- 06:54 AM PST     Sunrise
Sat -- 06:54 AM PST     Moonrise
Sat -- 10:40 AM PST     4.20 feet High Tide
Sat -- 04:56 PM PST     Sunset
Sat -- 05:34 PM PST     Moonset
Sat -- 06:02 PM PST     -0.23 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
3.332.621.61.41.522.83.54.14.23.93.22.41.40.5-0-0.200.61.42.32.9

Tide / Current Tables for San Francisco Bay Entrance (Golden Gate), California Current
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San Francisco Bay Entrance (Golden Gate)
Click for Map
Sat -- 01:17 AM PST     -0.01 knots Slack
Sat -- 03:39 AM PST     -2.54 knots Max Ebb
Sat -- 03:42 AM PST     New Moon
Sat -- 06:53 AM PST     Sunrise
Sat -- 06:53 AM PST     Moonrise
Sat -- 07:04 AM PST     0.01 knots Slack
Sat -- 09:49 AM PST     2.73 knots Max Flood
Sat -- 12:40 PM PST     -0.00 knots Slack
Sat -- 03:47 PM PST     -4.48 knots Max Ebb
Sat -- 04:56 PM PST     Sunset
Sat -- 05:33 PM PST     Moonset
Sat -- 07:46 PM PST     0.01 knots Slack
Sat -- 10:48 PM PST     3.56 knots Max Flood
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
2.30.6-1.3-2.4-2.5-2.1-1.3-0.11.42.42.72.21.1-0.7-2.7-4.1-4.5-3.9-2.9-1.40.52.23.33.6

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 (20,4,5,8)
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Ground Weather Radar Station San Francisco Bay Area, CA
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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.