Wednesday, January23, 2019 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 7:18AMSunset 5:24PM Wednesday January 23, 2019 3:03 AM PST (11:03 UTC) Moonrise 8:43PMMoonset 9:23AM Illumination 93% Phase: Waning Gibbous; Moon at 17 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- 212 Am Pst Wed Jan 23 2019
Today..N winds 5 to 15 kt. Wind waves 1 to 3 ft. W swell 5 to 7 ft at 16 seconds.
Tonight..N winds 10 to 20 kt. Wind waves 2 to 4 ft. W swell 7 to 9 ft at 15 seconds.
Thu..NW winds 5 to 15 kt. Wind waves 1 to 3 ft. W swell 6 to 8 ft at 15 seconds.
Thu night..NW winds 5 to 15 kt. Wind waves 1 to 3 ft. W swell 5 to 7 ft at 18 seconds.
Fri..N winds 5 to 15 kt. Wind waves 1 to 3 ft. W swell 5 to 7 ft at 16 seconds.
Sat..NE winds 10 to 20 kt. Wind waves 2 to 4 ft. W swell 4 to 6 ft.
Sun..NW winds 10 kt. Wind waves 2 ft or less. W swell 4 to 6 ft.
...san francisco bar/fourfathom bank forecast..... In the deep water channel...combined seas 4 to 6 ft with a dominant swell period of 11 seconds...increasing to 16 seconds in the afternoon. Across the bar...combined seas 5 to 7 feet with a dominant swell period of 11 seconds...increasing to 16 seconds in the afternoon. Maximum ebb current of 2.1 knots at 5:55 am Wednesday and 3.7 knots at 5:49 pm Wednesday.
PZZ500 212 Am Pst Wed Jan 23 2019
Synopsis for the central california coast and bays including the Monterey bay..Greater farallones...and cordell bank national marine sanctuaries... High pressure over the eastern pacific will generate moderate to locally gusty northerly winds across the coastal waters through much of the week. A series of small to moderate northwest swells are forecast throughout the week.


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 231043
afdmtr
area forecast discussion
national weather service san francisco bay area
243 am pst Wed jan 23 2019

Synopsis Building high pressure along the west coast will result
in a gradual warming trend through Saturday, along with mainly
clear skies. The dry weather pattern will likely last through the
end of the month, with a continuation of seasonably mild days and
cool nights.

Discussion As of 2:42 am pst Wednesday... Upper level high
pressure continues to build off the west coast. Latest overnight
satellite imagery shows a few high clouds spilling over the
periphery of the ridge. Despite a few high clouds spilling into
far norcal, much of the bay area is mostly clear. Clear skies and
relatively light winds will lead to a chilly morning. For what
it's worth the latest 24 hour trend does indicate many locations
are currently running cooler than 24 hours ago - mid 30s to 40s.

Given the clear skies and light winds temperatures are likely to
drop a few more degrees through shortly after sunrise patchy frost
is possible.

The upper level ridge is forecast to remain over the region and
ultimately strengthen moving inland this weekend. There is a
brief ripple late in the week with a weak inside slider, but the
next result locally is offshore flow. Therefore, the rest of the
work week and next weekend will be rather quiet weather wise.

Clear skies and dry conditions will prevail. Temperatures will
gradually warm through the period and peak Friday-Sunday with
periods offshore flow. Temperatures will warmer to above seasonal
levels with highs in the 60s and 70s. Overnight lows on the other
hand will remain cool to chilly with clear skies and light winds.

The question is, when will it rain next? The 00z operational runs
of both the ECMWF and GFS keep the bay area dry through 240 hours
(feb 1). However, some of the ensemble guidance gives a 25% chance
of 0.01" at ksfo around feb 1 or 2. Needless to say the extended
forecast will need some watching, but confidence does seem pretty
high that the region will remain dry through then end of january.

Aviation As of 9:30 pm pst Tuesday... For 06z tafs. High
pressure will maintain mainly clear skies across area terminals
with the exception of a few high clouds. Generally light winds
will prevail through the forecast period.

Vicinity of ksfo...VFR conditions will prevail through the period
with only a few high clouds expected. Light to locally variable winds
will persist.

Sfo bridge approach... Similar to sfo.

Monterey bay terminals...VFR conditions and light winds will
prevail through the period.

Marine As of 8:41 pm pst Tuesday... High pressure over the
eastern pacific will maintain light to moderate northerly winds
across the coastal waters through much of the week. Locally breezy
winds possible Wednesday afternoon and evening along the big sur
coast, south of point sur. A series of small to moderate northwest
swells are forecast throughout the week.

Mtr watches warnings advisories
Tday Sca... Pt arena to pigeon pt 10-60 nm from 3 pm
sca... Pt arena to pt reyes 0-10 nm from 1 pm
sca... Pt pinos to pt piedras blancas 0-10 nm from 1 pm
public forecast: mm
aviation: cw
marine: cw
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 9 mi33 min Calm G 1.9 54°F 55°F1030.8 hPa
FTPC1 - 9414290 - San Francisco, CA 11 mi51 min SSW 1.9 G 2.9 47°F 55°F1030.8 hPa
TIBC1 - Tiburon Pier, San Francisco Bay, CA 14 mi52 min WNW 4.1 48°F 1031 hPa
PXSC1 15 mi51 min 51°F 47°F
PXOC1 - 9414311 - San Francisco (Pier 1), CA 15 mi45 min WNW 2.9 G 4.1 50°F 1029.5 hPa
RCMC1 - 9414863 - Richmond, CA 17 mi45 min 54°F
OKXC1 - 9414776 - Oakland (Berth 34), CA 18 mi45 min N 6 G 7 50°F 1030.5 hPa
PPXC1 - 9414847 - Richmond (Point Potrero), CA 18 mi45 min N 5.1 G 7 47°F 1030.7 hPa
OMHC1 - 9414769 - Oakland Middle Harbor Met, CA 18 mi51 min NNW 2.9 G 4.1
OBXC1 18 mi45 min 50°F 48°F
AAMC1 - 9414750 - Alameda, CA 20 mi51 min Calm G 1 47°F 54°F1030.7 hPa
LNDC1 21 mi45 min NE 1 G 1.9 49°F 1030.4 hPa
PRYC1 - 9415020 - Point Reyes, CA 22 mi45 min 55°F1030.1 hPa
DPXC1 - 9415141 - Davis Point, San Pablo Bay, CA 29 mi45 min SE 1 G 1.9 46°F 1030.5 hPa
RTYC1 - 9414523 - Redwood City, CA 31 mi45 min SSE 1 G 2.9 45°F 55°F1030.8 hPa
MZXC1 - 9415102 - Martinez-Amorco CA 34 mi45 min Calm G 1 45°F 52°F1030.7 hPa45°F
PCOC1 - 9415144 - Port Chicago, CA 38 mi45 min SSW 7 G 8 42°F 51°F1030.8 hPa
46214 - Point Reyes, CA (029) 44 mi33 min 56°F8 ft
PSBC1 - 9415115 - Pittsburg (Suisun Bay), CA 45 mi45 min Calm G 0 45°F 1030.7 hPa
SFXC1 - San Francisco Bay Reserve, CA 45 mi78 min Calm 37°F 1030 hPa35°F
46013 - Bodega Bay - 48NM North Northwest of San Francisco, CA 46 mi33 min NNW 19 G 21 55°F1030.6 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 mi67 minS 310.00 miFair50°F35°F57%1030.1 hPa
Half Moon Bay Airport, CA21 mi68 minN 010.00 miFair37°F33°F87%1030.5 hPa
Oakland, Metro Oakland International Airport, CA24 mi70 minN 010.00 miFair44°F36°F73%1030.4 hPa

Wind History from SFO (wind in knots)
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Last 24hrN8NW6NW3CalmN8N6N5N6N4CalmCalmCalmE3E3NE3NW5W3CalmS3CalmW3CalmSW3S3
1 day agoW16
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W9NW5W7W8W8W15W12W13W16N6N8NE5CalmW12W14W9W9NW7W7W5CalmSE4S5
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Tide / Current Tables for San Francisco Bar, California
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San Francisco Bar
Click for Map
Wed -- 01:04 AM PST     5.37 feet High Tide
Wed -- 06:04 AM PST     2.24 feet Low Tide
Wed -- 07:21 AM PST     Sunrise
Wed -- 09:21 AM PST     Moonset
Wed -- 12:06 PM PST     6.43 feet High Tide
Wed -- 05:24 PM PST     Sunset
Wed -- 06:44 PM PST     -0.98 feet Low Tide
Wed -- 08:43 PM PST     Moonrise
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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55.45.14.33.32.62.22.53.24.25.266.46.15.13.51.70.2-0.8-1-0.40.61.93.2

Tide / Current Tables for South Channel, San Francisco Bay Approach, California Current
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South Channel
Click for Map
Wed -- 02:14 AM PST     -0.01 knots Slack
Wed -- 04:28 AM PST     -1.23 knots Max Ebb
Wed -- 07:20 AM PST     Sunrise
Wed -- 07:22 AM PST     0.00 knots Slack
Wed -- 09:21 AM PST     Moonset
Wed -- 10:17 AM PST     1.30 knots Max Flood
Wed -- 01:31 PM PST     -0.00 knots Slack
Wed -- 04:41 PM PST     -2.14 knots Max Ebb
Wed -- 05:23 PM PST     Sunset
Wed -- 08:11 PM PST     0.00 knots Slack
Wed -- 08:42 PM PST     Moonrise
Wed -- 11:14 PM PST     1.70 knots Max Flood
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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1.50.90.2-0.7-1.2-1.2-0.8-0.20.411.31.20.90.4-0.4-1.3-2-2.1-1.7-1-0.20.71.41.7

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 (6,6,7,8)
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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.