Monday, May29, 2017 L-36.com


Marine Weather and Tides
Muir Beach, CA

Version 3.4
What's New / NOTES
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 5:48AMSunset 8:26PM Monday May 29, 2017 4:30 AM PDT (11:30 UTC) Moonrise 9:04AMMoonset 11:23PM Illumination 16% Phase: Waxing Crescent; Moon at 4 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- 250 Am Pdt Mon May 29 2017
.small craft advisory in effect through late Tuesday night...
Today..NW winds 15 to 25 kt. Wind waves 3 to 5 ft. NW swell 3 ft at 10 seconds. Patchy fog in the morning. Patchy drizzle in the morning.
Tonight..NW winds 20 to 30 kt. Wind waves 4 to 6 ft. NW swell 3 ft at 10 seconds. Patchy drizzle after midnight.
Tue..NW winds 15 to 25 kt. Wind waves 3 to 5 ft. NW swell 3 ft at 10 seconds. Patchy drizzle in the morning.
Tue night..NW winds 15 to 25 kt. Wind waves 3 to 5 ft. NW swell 3 ft at 11 seconds. Slight chance of showers after midnight.
Wed..NW winds 10 to 20 kt. Wind waves 2 to 4 ft. W swell 3 to 4 ft at 12 seconds. Patchy fog after midnight.
Thu..NW winds 15 to 25 kt. Wind waves 3 to 5 ft. W swell 3 to 4 ft. Patchy fog.
Fri..NW winds 15 to 25 kt. Wind waves 3 to 5 ft. W swell 3 to 4 ft. Patchy fog.
...san francisco bar/fourfathom bank forecast..... In the deep water channel...combined seas 2 to 4 ft with a dominant period of 10 seconds. Across the bar...combined seas 3 to 5 ft with a dominant period of 10 seconds. Maximum ebb current of 2 knots at 05:54 am Monday and 1 knots at 07:18 pm Monday.
PZZ500 250 Am Pdt Mon May 29 2017
Synopsis for the central california coast and bays including the Monterey bay..Greater farallones...and cordell bank national marine sanctuaries... Strong high pressure over the pacific and low pressure over southern california will result in gusty northerly winds over the coastal waters. The gusty winds will produced hazardous conditions with steep winds waves and fresh swell. Winds will decrease mid week as a weak frontal system moves through the coastal waters.

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 290954
afdmtr
area forecast discussion
national weather service san francisco bay area
254 am pdt Mon may 29 2017

Synopsis Dry weather and seasonable temperatures are forecast
today and tomorrow. Cooler conditions along with a slight chance
of showers can be expected on Wednesday.

Discussion As of 3:00 pm pdt Monday... Widespread clouds
overnight for many spots with the marine layer still at 1500 feet
plus a moderate onshore flow. Similar to yesterday, most spots are
in the 50s and should see lows mostly in the upper 40s to the mid
50s by day break.

Today will be a near repeat of yesterday with clouds forecast to
slowly burn-off toward the coast by late in the morning. Yesterday
turned out to be a bit of a surprise in the east bay with a very
late transition to sunny skies. Models hint at the possibility
again today which could keep temps running a bit lower than
forecast. Outside of that, no issues anticipated with highs
expected to range from the 50s and 60s at the coast up to the 70s
and lower 80s inland. A few locations well inland could get into
the mid to upper 80s. Tonight will feature another round of patchy
fog and drizzle mainly near the coast.

Synoptically an upper level low will works it's way to the bc
coastline while an associated trough advances to the west coast.

Ahead of the main trough, a weak shortwave will move through on
Tuesday which will start to deepen the marine layer and provide a
degree or two of cooling. More substantial cooling (especially
inland) can be expected on Wednesday as the main trough moves
onshore. At the same time enough instability and associated
moisture could lead to a few showers late Tuesday into Wednesday,
although latest guidance has backed off a bit. Winds will also
pick up on Wednesday as the onshore flow increases. Westerly winds
of 10 to 20 mph with local gusts to 30 mph can be expected.

A weak ridge of high pressure will start to rebuild into our
region going to the end of the week. Highs will return back to
near normal levels.

Aviation 10:25 pm pdt Sunday for 06z tafs... Low clouds are
moving back in tonight with several terminals already reporting
ifr MVFR ceilings. Expect all terminals to see low clouds
as the night progresses and continue into Monday morning. Some
locations may see the clouds persist into the afternoon, or even
all day. West to northwest winds will become gusty by Monday
afternoon.

Vicinity of ksfo... Low clouds have pushed through the gap and have
brought overcast ifr ceilings to the most recent hourly
observation. Expect low clouds to persist through most of the
morning. Guidance suggests strong west winds on Monday afternoon
with gusts up to 25 or 30 kt.

Sfo bridge approach... Similar to ksfo.

Monterey bay terminals... Ifr ceilings overnight and through
Monday morning. Similar to Sunday, ksns has a better chance for
clearing in the afternoon whereas kmry may remain overcast through
the afternoon. Winds will increase Monday afternoon out of the
west at 10 to 20 kt.

Marine As of 10:09 pm pdt Sunday... Brisk northwest winds will
continue over the coastal waters tonight and into the memorial
day holiday as high pressure remains strong off the west coast.

The gusty winds will produce hazardous conditions with steeper
wind waves and fresh swell. Winds will decrease Tuesday night as
a weak frontal system moves through the coastal waters.

Mtr watches warnings advisories
Tday Sca... Pt arena to pt reyes 0-10 nm
sca... Pt reyes to pigeon pt 0-10 nm
sca... Pigeon pt to pt pinos 0-10 nm
sca... Pt pinos to pt piedras blancas 0-10 nm
sca... Pt arena to pigeon pt 10-60 nm
sca... Pigeon pt to pt piedras blancas 10-60 nm
sca... Sf bay until 3 am
sca... Mry bay until 3 am
sca... Sf bay from 12 pm
sca... Mry bay from 12 pm
public forecast: bell
aviation: rowe
marine: rowe sims
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 mi60 min 53°F5 ft
46026 - SAN FRANCISCO - 18NM West of San Francisco, CA 9 mi40 min NW 19 G 25 52°F 53°F6 ft1016.1 hPa (-0.5)
FTPC1 - 9414290 - San Francisco, CA 11 mi48 min WSW 8.9 G 21 52°F 55°F1016 hPa
TIBC1 - Tiburon Pier, San Francisco Bay, CA 14 mi53 min SSW 5.1 53°F 1016 hPa
PXOC1 - 9414311 - San Francisco (Pier 1), CA 15 mi42 min WSW 6 G 16 51°F 1014.9 hPa
PXSC1 15 mi42 min 52°F 51°F
RCMC1 - 9414863 - Richmond, CA 17 mi48 min S 2.9 G 4.1 54°F 59°F1015.5 hPa
OMHC1 - 9414769 - Oakland Middle Harbor Met, CA 18 mi42 min WSW 9.9 G 13
PPXC1 - 9414847 - Richmond (Point Potrero), CA 18 mi42 min S 5.1 G 7 54°F 1015.9 hPa
OBXC1 18 mi42 min 53°F 51°F
OKXC1 - 9414776 - Oakland (Berth 34), CA 18 mi42 min WSW 7 G 12 53°F 1016.2 hPa
AAMC1 - 9414750 - Alameda, CA 20 mi42 min W 5.1 G 9.9 53°F 63°F1016.8 hPa
LNDC1 21 mi42 min WSW 8 G 12 53°F 1016.3 hPa
PRYC1 - 9415020 - Point Reyes, CA 22 mi42 min WNW 21 G 26 54°F 50°F1015.7 hPa
DPXC1 - 9415141 - Davis Point, San Pablo Bay, CA 29 mi42 min SW 15 G 18 54°F 1015 hPa
RTYC1 - 9414523 - Redwood City, CA 31 mi42 min W 12 G 14 53°F 66°F1016.1 hPa
46012 - HALF MOON BAY - 24NM South Southwest of San Francisco, CA 31 mi40 min NW 18 G 21 53°F 54°F7 ft1016.2 hPa (-0.7)
UPBC1 34 mi48 min W 11 G 14
MZXC1 - 9415102 - Martinez-Amorco CA 34 mi42 min W 11 G 14 55°F 64°F1015.2 hPa54°F
PCOC1 - 9415144 - Port Chicago, CA 38 mi42 min SW 8.9 G 12 54°F 65°F1014.6 hPa
46214 - Point Reyes, CA (029) 44 mi30 min 53°F8 ft
SFXC1 - San Francisco Bay Reserve, CA 45 mi105 min W 11 53°F 1014 hPa52°F
PSBC1 - 9415115 - Pittsburg (Suisun Bay), CA 45 mi42 min WNW 12 G 17 57°F 1013.2 hPa
46013 - Bodega Bay - 48NM North Northwest of San Francisco, CA 46 mi30 min NW 23 G 29 52°F 51°F1015.9 hPa (-0.3)51°F

Wind History for San Francisco, 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, CA20 mi34 minWSW 15 G 1910.00 miOvercast53°F48°F86%1016.5 hPa
Half Moon Bay Airport, CA21 mi35 minNW 11 G 154.00 miFog/Mist52°F50°F94%1017.3 hPa
Oakland, Metro Oakland International Airport, CA24 mi37 minW 13 G 1910.00 miOvercast55°F52°F90%1016.7 hPa

Wind History from SFO (wind in knots)
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Last 24hrW11W8W13W11W11W12W12W14W19
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1 day agoS43SW5SW6SW6W9SW9W13W15W16W16
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W19W17W17W17W18W13W14W13W11W13
2 days agoCalmS5SW9S11S9S9S13SW11S13S11SW13SW18SW17SW14W13W12W11W8W8SW6SW6SW6SW6SW7

Tide / Current Tables for San Francisco Bar, California
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San Francisco Bar
Click for Map
Mon -- 01:45 AM PDT     5.94 feet High Tide
Mon -- 05:51 AM PDT     Sunrise
Mon -- 08:35 AM PDT     -1.36 feet Low Tide
Mon -- 10:04 AM PDT     Moonrise
Mon -- 03:56 PM PDT     4.87 feet High Tide
Mon -- 08:25 PM PDT     Sunset
Mon -- 08:55 PM PDT     2.49 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
5.25.85.95.44.32.60.9-0.5-1.2-1.3-0.80.21.42.63.84.64.94.63.93.22.72.52.73.3

Tide / Current Tables for South Channel, San Francisco Bay Approach, California Current
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South Channel
Click for Map
Mon -- 03:03 AM PDT     -0.00 knots Slack
Mon -- 05:51 AM PDT     Sunrise
Mon -- 06:19 AM PDT     -2.10 knots Max Ebb
Mon -- 09:57 AM PDT     0.00 knots Slack
Mon -- 10:03 AM PDT     Moonrise
Mon -- 01:04 PM PDT     1.63 knots Max Flood
Mon -- 04:58 PM PDT     -0.01 knots Slack
Mon -- 07:05 PM PDT     -1.00 knots Max Ebb
Mon -- 08:24 PM PDT     Sunset
Mon -- 10:10 PM PDT     0.00 knots Slack
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
1.110.60-0.8-1.6-2.1-2-1.5-0.800.81.41.61.51.20.7-0-0.7-1-0.9-0.5-0.10.4

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 (7,2,3,4)
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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.