Saturday, November17, 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 6:51AMSunset 4:58PM Saturday November 17, 2018 3:11 PM PST (23:11 UTC) Moonrise 2:19PMMoonset 1:02AM Illumination 74% Phase: Waxing Gibbous; Moon at 10 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- 152 Pm Pst Sat Nov 17 2018
Rest of today..SW winds 5 to 10 kt. Wind waves 2 ft or less. W swell 2 to 4 ft at 16 seconds and sw around 2 ft at 15 seconds. Hazy and patchy smoke.
Tonight..S winds around 5 kt. Wind waves 2 ft or less. W swell 2 to 5 ft at 16 seconds and sw around 2 ft at 15 seconds. Hazy and patchy smoke.
Sun..W winds around 5 kt. Wind waves 2 ft or less. W swell 4 to 5 ft at 14 seconds and S around 2 ft at 16 seconds. Hazy and patchy smoke.
Sun night..NW winds up to 10 kt. Wind waves 2 ft or less. W swell 3 to 5 ft at 13 seconds and sw around 2 ft at 16 seconds. Hazy and patchy smoke.
Mon..NW winds 5 to 10 kt. Wind waves 2 ft or less. W swell 3 to 4 ft at 12 seconds and sw around 2 ft at 16 seconds. Hazy and patchy smoke.
Mon night..SW winds up to 10 kt. Wind waves 2 ft or less. W swell 2 to 3 ft at 12 seconds and sw around 2 ft at 16 seconds.
Tue..S winds 5 to 15 kt. Wind waves 2 ft or less. W swell 2 to 4 ft and sw around 2 ft. Rain likely.
Wed..S winds 10 to 15 kt. Wind waves 2 ft or less. W swell 4 to 6 ft and S around 2 ft. Rain.
...san francisco bar/fourfathom bank forecast..... In the deep water channel...combined seas 4 to 5 ft with a dominant period of 11 seconds. Across the bar...combined seas 5 to 6 ft with a dominant period of 11 seconds. Maximum ebb current of 1.5 knots at 12:19 am Sunday and 2.2 knots at 01:07 pm Sunday.
PZZ500 152 Pm Pst Sat Nov 17 2018
Synopsis for the central california coast and bays including the Monterey bay..Greater farallones...and cordell bank national marine sanctuaries... Light winds through the weekend and into early next week. An approaching storm system will bring increasing southerly winds mid week next week. Mixed moderate northwest swell and a light southerly swell will persist.


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 172143
afdmtr
area forecast discussion
national weather service san francisco bay area
143 pm pst Sat nov 17 2018

Synopsis Widespread smoke and haze at times combining with
coastal fog resulting in extended poor air quality and low
visibilities over the san francisco bay area should show some
improvement first along the immediate coast today then inland
Sunday. Forecast models continue to indicate an active pacific
weather pattern reaching california next week with the potential
for widespread periodic rainfall starting Wednesday and continuing
into next weekend.

Discussion As of 1:43 pm pst Saturday... Afternoon temperatures
are running on the cool side today with weak onshore flow and
muted sunshine due to smoky skies. Current readings range from the
upper 50s to upper 60s, with a few lower to middle 70s in inland
monterey county. Visibilities at area airports continue to be poor
across the entire san francisco bay and central coast areas,
generally 1 to 3 miles due to smoke. Slight relief is possible
near the coast from the current weak onshore flow, but the poor
air quality is expected to persist until the expected rain events
midweek.

The upper level ridge anchored along the west coast is starting
to slowly break down with the approach of an upper trough. During
the next couple of days, winds are expected to continue to be
light, with mild daytime highs and cool overnight lows. By mid-
week, things will change as the first of several frontal systems
impacts the state.

The 12z GFS brings rainfall into coastal areas from the monterey
bay northward late Tuesday night, spreading rainfall eastward
through the rest of northern california Wednesday. Another system
is progged for Friday with showers into Saturday, and then a
third front moves through on Sunday. The 12z ECMWF now has more
similar timing to the gfs, with a stronger trough initially
reaching the coast early Wednesday morning, and spreading
rainfall eastward by Thursday. Then, another system tries to push
in from the north on Friday, with a weaker system bringing
showers to the far north on Saturday. Even though there are still
some discrepancies between these model solutions, the overarching
theme is a more likely chance of rain reaching our region during
the middle to latter part of next week. This rainfall will not
only bring beneficial moisture to the area, but also improve the
air quality.

Aviation As of 09:50 am pst Saturday... For 18z tafs. Tafs
adjusted towards a more pessimistic scenario due to development
of smog from mixing of marine air mass and smoke particulates this
morning. Monterey area saw visibility of 1 8mi or less this
morning due to this and a deeper marine intrusion is expected
tonight. This will also bring ceilings down in addition to
visibility, but it will be difficult to pin down an actual ceiling
with all the smoke present. Expect borderline MVFR to ifr cigs
thru tomorrow morning if marine push is as robust as WRF model
indicates, however, smoke present may worsen ceilings slightly,
bringing some areas down to borderline lifr-ifr range. Visibility
will be worse near or just after sunrise thru mid morning with
additional slant range visby issues. Tempo 12-16z for most tafs
sun morning reflects this. No widescale improvement in visibility
expected until the next storm system arrives mid week next week.

Light winds.

Vicinity of ksfo... Ifr MVFR vis due to smog. Slant range vis
issues will persist. Marine stratus push tonight will bring
additional issues with CIGS tmrw morn. Winds light.

Sfo bridge approach... Similar to ksfo.

Monterey bay terminals... Vlifr visibilities due to smog possibly
return again tomorrow morning. Generally ifr- MVFR visibilities
through TAF period otherwise. Light winds.

Marine As of 09:45 am pst Saturday... Light winds through the
weekend and into early next week. An approaching storm system will
bring increasing southerly winds mid week next week. Mixed
moderate northwest swell and a light southerly swell will
persist.

Mtr watches warnings advisories
Tngt None.

Public forecast: sims
aviation: drp
marine: drp
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 mi41 min 55°F4 ft
46026 - SAN FRANCISCO - 18NM West of San Francisco, CA 9 mi31 min Calm G 1.9 58°F 55°F1017.7 hPa
FTPC1 - 9414290 - San Francisco, CA 11 mi41 min WSW 8 G 12
TIBC1 - Tiburon Pier, San Francisco Bay, CA 14 mi48 min ESE 1.9 58°F 1017 hPa
PXSC1 15 mi41 min 58°F 49°F
PXOC1 - 9414311 - San Francisco (Pier 1), CA 15 mi41 min WSW 7 G 9.9 57°F 1015.9 hPa
RCMC1 - 9414863 - Richmond, CA 17 mi41 min S 2.9 G 6 56°F
PPXC1 - 9414847 - Richmond (Point Potrero), CA 18 mi41 min SW 7 G 8 57°F 1017.1 hPa
OMHC1 - 9414769 - Oakland Middle Harbor Met, CA 18 mi41 min W 7 G 8
OKXC1 - 9414776 - Oakland (Berth 34), CA 18 mi59 min WNW 8 G 11 55°F 1016.8 hPa
OBXC1 18 mi41 min 56°F 51°F
AAMC1 - 9414750 - Alameda, CA 20 mi41 min W 6 G 8
LNDC1 21 mi41 min WNW 2.9 G 5.1 59°F 1016.7 hPa
PRYC1 - 9415020 - Point Reyes, CA 22 mi47 min ESE 1.9 G 2.9 55°F1016.9 hPa
DPXC1 - 9415141 - Davis Point, San Pablo Bay, CA 29 mi41 min WNW 1.9 G 2.9 59°F 1016.2 hPa
RTYC1 - 9414523 - Redwood City, CA 31 mi41 min NNW 8 G 11 58°F 58°F1017 hPa
MZXC1 - 9415102 - Martinez-Amorco CA 34 mi41 min WNW 1.9 G 1.9 58°F 57°F1016.4 hPa42°F
PCOC1 - 9415144 - Port Chicago, CA 38 mi41 min WNW 1.9 G 2.9 58°F 57°F1016.4 hPa
46214 - Point Reyes, CA (029) 44 mi41 min 57°F5 ft
SFXC1 - San Francisco Bay Reserve, CA 45 mi86 min WSW 5.1 63°F 1016 hPa32°F
PSBC1 - 9415115 - Pittsburg (Suisun Bay), CA 45 mi41 min Calm G 1 62°F 1016.1 hPa
46013 - Bodega Bay - 48NM North Northwest of San Francisco, CA 46 mi31 min SE 3.9 G 3.9 57°F1017.1 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 mi15 minW 123.00 miPartly Cloudy with Haze58°F46°F65%1016.4 hPa
Half Moon Bay Airport, CA21 mi16 minN 03.00 miFair with Haze55°F48°F77%1017.6 hPa
Oakland, Metro Oakland International Airport, CA24 mi18 minWNW 93.00 miOvercast with Haze60°F48°F65%1016.9 hPa

Wind History from SFO (wind in knots)
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Last 24hrCalmCalmN3CalmW8W5W5CalmW3NW5W5W5W6W5W3CalmS4S3CalmNW8NW7N7NW7NW12
1 day agoCalmE3E3S3CalmCalmS3S3S4CalmN3S3CalmCalmS3CalmSE3S3SE53E4E3NE4N5
2 days agoCalmCalmNW6W8W4S4CalmS3CalmS4CalmSW4SW4SW3CalmSW3CalmS4S3CalmNE3CalmCalmN4

Tide / Current Tables for San Francisco Bar, California
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San Francisco Bar
Click for Map
Sat -- 01:01 AM PST     Moonset
Sat -- 06:53 AM PST     Sunrise
Sat -- 07:02 AM PST     4.92 feet High Tide
Sat -- 01:09 PM PST     2.06 feet Low Tide
Sat -- 02:19 PM PST     Moonrise
Sat -- 04:57 PM PST     Sunset
Sat -- 06:39 PM PST     4.05 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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0.91.21.72.53.44.24.74.94.74.23.52.82.32.12.22.63.13.6443.73.12.41.7

Tide / Current Tables for South Channel, San Francisco Bay Approach, California Current
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South Channel
Click for Map
Sat -- 01:01 AM PST     Moonset
Sat -- 01:21 AM PST     0.01 knots Slack
Sat -- 04:29 AM PST     1.10 knots Max Flood
Sat -- 06:52 AM PST     Sunrise
Sat -- 08:03 AM PST     -0.01 knots Slack
Sat -- 10:31 AM PST     -1.01 knots Max Ebb
Sat -- 02:10 PM PST     0.00 knots Slack
Sat -- 02:18 PM PST     Moonrise
Sat -- 04:50 PM PST     0.78 knots Max Flood
Sat -- 04:57 PM PST     Sunset
Sat -- 07:59 PM PST     -0.00 knots Slack
Sat -- 10:37 PM PST     -1.14 knots Max Ebb
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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-0.6-0.20.40.81.11.10.90.60-0.6-1-1-0.8-0.6-0.10.40.70.80.70.4-0-0.6-1.1-1.1

Weather Map and Satellite Images
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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 (18,4,5,8)
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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.