Tuesday, October23, 2018 L-36.com


Marine Weather and Tides
Muir Beach, CA

Version 3.4
What's New / NOTES
10/6/2018 Colors of tide XTide graphs changed to emphasize that they were upgraded. See next note. Comments welcome.
10/4/2018 I have fixed XTide and updated the harmonic files. There were some name changes so you might have to click EDIT to find the new station name.

Sunrise 7:25AMSunset 6:22PM Tuesday October 23, 2018 8:39 AM PDT (15:39 UTC) Moonrise 5:20PMMoonset 5:15AM Illumination 99% Phase: Waxing Gibbous; 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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PZZ545 Coastal Waters From Point Reyes To Pigeon Point California Out To 10 Nm- 219 Am Pdt Tue Oct 23 2018
Today..NW winds 5 to 10 kt...becoming 5 to 15 kt this afternoon. Wind waves 2 ft or less...becoming 3 to 4 ft this afternoon. W swell 3 to 4 ft at 11 seconds and sw 2 to 3 ft at 17 seconds.
Tonight..NW winds 5 to 15 kt. Wind waves 3 to 4 ft. W swell 2 to 4 ft at 12 seconds and sw 2 to 3 ft at 16 seconds.
Wed..NW winds 10 to 15 kt with gusts up to 25 kt. Wind waves 3 to 4 ft. W swell 3 to 5 ft at 12 seconds and sw 2 to 3 ft at 16 seconds.
Wed night..NW winds 5 to 15 kt with gusts up to 25 kt. Wind waves 3 to 4 ft. W swell 4 to 7 ft at 14 seconds and sw 2 to 3 ft at 16 seconds.
Thu..NW winds 5 to 15 kt. Wind waves 2 ft or less. W swell 4 to 6 ft at 13 seconds and sw 2 to 3 ft at 15 seconds.
Thu night..NW winds 5 to 15 kt. Wind waves 3 to 4 ft. W swell 5 to 8 ft at 14 seconds and sw 2 to 3 ft at 15 seconds.
Fri..NW winds 5 to 15 kt. Wind waves 2 ft or less. W swell 5 to 8 ft and sw 2 to 3 ft.
Sat..NW winds 5 to 10 kt. Wind waves 2 ft or less. W swell 4 to 7 ft and sw 2 to 3 ft.
...san francisco bar/fourfathom bank forecast..... In the deep water channel...combined seas 2 to 4 ft with a dominant period of 11 seconds. Across the bar...combined seas 3 to 5 ft with a dominant period of 11 seconds. Maximum ebb current of 1.9 knots at 03:01 am Tuesday and 3.2 knots at 03:19 pm Tuesday.
PZZ500 219 Am Pdt Tue Oct 23 2018
Synopsis for the central california coast and bays including the Monterey bay..Greater farallones...and cordell bank national marine sanctuaries... Generally light winds will continue through much of the week as high pressure builds. Expect locally gusty northwest winds along the big sur coast through Wednesday evening. Mixed moderate period northwest swell and a longer period southerly swell will continue through the forecast period.


7 Day Forecast for Marine Location Near Muir Beach, CA
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location: 37.78, -122.67     debug


Area Discussion for - San Francisco/Monterey Bay Area, CA
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Fxus66 kmtr 231129
afdmtr
area forecast discussion
national weather service san francisco bay area
429 am pdt Tue oct 23 2018

Synopsis Seasonably cool conditions will persist through midweek
as an upper level trough pushes inland over the pacific northwest
and northern california. A warming trend is then likely late in the
week and into Saturday as high pressure builds over california.

Temperatures trend downward early next week as another upper level
system pushes inland north of the region. Dry weather conditions are
likely to prevail through the forecast period.

Discussion As of 03:21 am pdt Tuesday... A marine layer of
around 1,500 feet in depth remains over the region this morning.

This has allowed for low clouds to intrude well inland into the
salinas valley, around the san francisco bay area and into much of
the coastal north bay. However, the cloud cover off of the san
mateo coastline down along the big sur coast has struggled to fill
in this morning in response to drier northeasterly winds just off
the surface. Look for cloud cover to dissipate over inland areas
by this afternoon with temperatures warming into the 60s near the
coast to 70s inland. These conditions are in response to cooler
air advecting across the region as a weak mid upper level trough
pushes inland.

The marine layer is forecast to mix out some by Wednesday as high
pressure begins to build over the region. This should result in less
widespread cloud cover late tonight into Wednesday morning and a
slight warming trend by Wednesday afternoon. The ridge of high
pressure out over the eastern pacific will build further into the
region late in the week and into Saturday. With this, temperatures
will warm back to above seasonal averages by Friday with coastal
areas warming into the 70s while the interior will see widespread
80s. Weak offshore flow at times will keep mild warm temperatures
region-wide into Saturday with less widespread coastal stratus as
well.

Temperatures level off on Sunday and begin to cool early next week
as the ridge flattens ahead of another approaching mid upper level
trough. The latest forecast models are in a good agreement with
this cooling trend and also keep any precipitation well north of the
region. Thus, dry conditions are likely to persist through the
forecast period.

Aviation As of 04:29 am pdt Tuesday... For 12z tafs. Satellite
imagery shows stratus along the coast with patches of low clouds inland.

Can also see high clouds approaching from the west. A boundary
offshore stretching from southern marin county through monterey
county appears to be breaking up the stratus along the coast. This
will make for a difficult cig forecast for bay area TAF sites.

MVFR CIGS expected through the morning (~16z-18z) with periods of
clearing for sites near the boundary. Once the stratus clears,
expectVFR conditions before potential patchy stratus development
tonight.

Vicinity of ksfo... .Vfr prevailing with periods of MVFR cigs
through the early morning. A boundary offshore appears to be
breaking apart the stratus before it reaches the airport. Still
possible the clouds will fill back in, but confidence is low.VFR
this afternoon and evening. Onshore winds this afternoon around 15
kt.

Sfo bridge approach... Similar to ksfo.

Monterey bay terminals... MVFR ifr CIGS through late morning.VFR
this afternoon before stratus returns this evening.

Marine As of 03:21 am pdt Tuesday... Generally light winds will
continue through much of the week as high pressure builds. Expect
locally gusty northwest winds along the big sur coast through
Wednesday evening. Mixed moderate period northwest swell and a
longer period southerly swell will continue through the forecast
period.

Mtr watches warnings advisories
Tday Sca... Pt pinos to pt piedras blancas 0-10 nm
public forecast: rgass
aviation: as
marine: as
visit us at

Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
46237 - San Francisco Bar, CA (142) 2 mi40 min 59°F4 ft
46026 - SAN FRANCISCO - 18NM West of San Francisco, CA 9 mi30 min N 5.8 G 7.8 58°F 59°F1016.7 hPa
FTPC1 - 9414290 - San Francisco, CA 11 mi46 min N 2.9 G 2.9 56°F 60°F1016.5 hPa
TIBC1 - Tiburon Pier, San Francisco Bay, CA 14 mi35 min WSW 1 54°F 1016 hPa
PXSC1 15 mi40 min 57°F 51°F
PXOC1 - 9414311 - San Francisco (Pier 1), CA 15 mi40 min N 5.1 G 6 55°F 1015.4 hPa (+0.9)
RCMC1 - 9414863 - Richmond, CA 17 mi46 min W 1.9 G 2.9 56°F 62°F1016.1 hPa
PPXC1 - 9414847 - Richmond (Point Potrero), CA 18 mi40 min N 1.9 G 2.9 56°F 1016.7 hPa (+0.9)
OMHC1 - 9414769 - Oakland Middle Harbor Met, CA 18 mi40 min N 6 G 8
OKXC1 - 9414776 - Oakland (Berth 34), CA 18 mi40 min N 6 G 8 56°F 1016.5 hPa (+1.0)
OBXC1 18 mi40 min 56°F 50°F
AAMC1 - 9414750 - Alameda, CA 20 mi46 min WNW 4.1 G 5.1 56°F 62°F1016.8 hPa
LNDC1 21 mi40 min WNW 2.9 G 6 56°F 1016.4 hPa (+0.9)
PRYC1 - 9415020 - Point Reyes, CA 22 mi40 min Calm G 1.9 57°F1015.7 hPa (+0.3)
DPXC1 - 9415141 - Davis Point, San Pablo Bay, CA 29 mi40 min WNW 8 G 9.9 55°F 1016.1 hPa (+1.0)
RTYC1 - 9414523 - Redwood City, CA 31 mi40 min S 2.9 G 4.1 55°F 65°F1017.3 hPa (+1.0)
MZXC1 - 9415102 - Martinez-Amorco CA 34 mi40 min SW 8 G 9.9 54°F 62°F1016.4 hPa (+1.3)54°F
PCOC1 - 9415144 - Port Chicago, CA 38 mi40 min SW 9.9 G 13 53°F 63°F1016.3 hPa (+1.4)
46214 - Point Reyes, CA (029) 44 mi40 min 61°F6 ft
SFXC1 - San Francisco Bay Reserve, CA 45 mi55 min W 11 51°F 1015 hPa
PSBC1 - 9415115 - Pittsburg (Suisun Bay), CA 45 mi40 min WNW 13 G 18 55°F 1015.7 hPa (+1.8)
46013 - Bodega Bay - 48NM North Northwest of San Francisco, CA 46 mi30 min NNE 3.9 G 5.8 58°F1015.9 hPa

Wind History for San Francisco, CA
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
San Francisco, San Francisco International Airport, CA20 mi44 minSE 410.00 miMostly Cloudy53°F46°F80%1016.2 hPa
Oakland, Metro Oakland International Airport, CA24 mi47 minNW 610.00 miMostly Cloudy57°F48°F72%1016.7 hPa

Wind History from SFO (wind in knots)
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Last 24hrW4W8NW6NW6NW10W14W14W17W14W15W13W10W10W7W7W3CalmW5CalmCalmS4S3S4SE4
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2 days agoCalmN3NW9NW7N5NW12NW15W20NW17W17W16W17
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Tide / Current Tables for San Francisco Bar, California
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San Francisco Bar
Click for Map
Tue -- 04:24 AM PDT     1.12 feet Low Tide
Tue -- 06:15 AM PDT     Moonset
Tue -- 07:27 AM PDT     Sunrise
Tue -- 10:50 AM PDT     5.53 feet High Tide
Tue -- 05:00 PM PDT     0.56 feet Low Tide
Tue -- 06:19 PM PDT     Moonrise
Tue -- 06:22 PM PDT     Sunset
Tue -- 11:27 PM PDT     4.90 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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4.43.62.51.61.21.21.82.73.74.65.35.55.14.22.91.70.90.60.81.52.53.54.34.8

Tide / Current Tables for South Channel, San Francisco Bay Approach, California Current
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South Channel
Click for Map
Tue -- 12:04 AM PDT     -0.01 knots Slack
Tue -- 02:37 AM PDT     -1.36 knots Max Ebb
Tue -- 05:53 AM PDT     0.01 knots Slack
Tue -- 06:14 AM PDT     Moonset
Tue -- 07:26 AM PDT     Sunrise
Tue -- 08:47 AM PDT     1.27 knots Max Flood
Tue -- 12:11 PM PDT     -0.00 knots Slack
Tue -- 02:58 PM PDT     -1.63 knots Max Ebb
Tue -- 06:19 PM PDT     Moonrise
Tue -- 06:21 PM PDT     Sunset
Tue -- 06:22 PM PDT     0.01 knots Slack
Tue -- 09:17 PM PDT     1.36 knots Max Flood
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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0-0.7-1.3-1.3-1-0.60.10.71.21.31.10.70.1-0.7-1.4-1.6-1.4-0.9-0.30.41.11.31.31

Weather Map and Satellite Images
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wmap_P
GOES 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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Other links: Northern Pacific     Contential US     Full GOES-East
Wind Forecast for San Francisco/Monterey Bay Area, CA (11,2,3,4)
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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.