Monday, March27, 2017 L-36.com


Marine Weather and Tides
Muir Beach, CA

Version 3.4
What's New / NOTES
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.
3/12/2015 - Added section for Gulf current for users in the GMZ marine zones.
This was requested by a user. If you have requests, please let me know.

Sunrise 6:59AMSunset 7:30PM Monday March 27, 2017 3:37 AM PDT (10:37 UTC) Moonrise 6:01AMMoonset 6:19PM Illumination 0% Phase: New Moon; Moon at 29 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- 254 Am Pdt Mon Mar 27 2017
.small craft advisory in effect from noon pdt today through Tuesday afternoon...
Today..NW winds 15 to 25 kt. Wind waves 4 to 6 ft. W swell 6 to 8 ft at 11 seconds.
Tonight..NW winds 15 to 25 kt. Wind waves 4 to 6 ft. W swell 9 to 11 ft at 11 seconds.
Tue..NW winds 15 to 25 kt. Wind waves 3 to 5 ft. W swell 8 to 10 ft at 11 seconds.
Tue night..NW winds 15 to 25 kt. Wind waves 3 to 5 ft. W swell 9 to 11 ft at 13 seconds.
Wed..NW winds 15 to 25 kt. Wind waves 3 to 5 ft. W swell 8 to 10 ft at 15 seconds.
Thu..NW winds 20 to 30 kt. Wind waves 4 to 6 ft. W swell 8 to 10 ft.
Fri..NW winds 15 to 25 kt. Wind waves 4 to 6 ft. W swell 8 to 10 ft.
...san francisco bar/fourfathom bank forecast..... In the deep water channel...combined seas 7 to 9 ft with a dominant swell period of 12 seconds. Across the bar...combined seas 8 to 10 ft with a dominant swell period of 12 seconds. Maximum ebb current of 1.3 knots at 03:12 am Monday and 1.7 knots at 03:18 pm Monday.
PZZ500 254 Am Pdt Mon Mar 27 2017
Synopsis for the central california coast and bays including the Monterey bay..Greater farallones...and cordell bank national marine sanctuaries... Northwest winds will increase this afternoon through at least Tuesday as a strong surface pressure gradient builds across the region. At the same time, a building northwest swell will pass through the waters. Typical gusty spring time northwest winds will continue at least through midweek and likely through Friday as the next weather system will likely increase the surface pressure gradient once again.

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 270531
afdmtr
area forecast discussion
national weather service san francisco bay area
1031 pm pdt Sun mar 26 2017

Synopsis A cold front will move southeast across the bay area
and north central coast this evening and overnight. Rain with this
front will continue to spread southeastward tonight then gradually
taper off to showers Monday morning. Decreasing clouds Monday will
be followed by brisk afternoon and evening northwest winds. High
pressure will quickly build back over northern california Tuesday
and persist through late week resulting in dry weather and slightly
warmer than average temperatures for late march and early april.

Discussion As of 8:49 pm pdt Sunday... A cold front over the
eastern pacific will continue to press southeastward across the
bay area and north central coast this evening and overnight. Brief
mid level warm air advection mainly earlier today ahead of the
cold front will continue to quickly shift south-southeastward
parallel to the california coast and become replaced by cold air
advection later tonight into Monday morning. Rain with this front
will continue to spread southeastward as well then gradually taper
off to showers Monday morning. 850 mb temperatures lowering from
5c this evening to approx 0c-2c Monday sets the stage for a chilly
and brisk Monday despite a late march Sun angle. After this point
an upper level ridge will build in quickly bringing a quick turn
around to milder temperatures from Tuesday through late week.

Temperatures from Tuesday onward through late week and next
weekend will become slightly warmer than average for late march
and early april.

Aviation As of 10:31 pm pdt Sunday... For 06z tafs. Weak front
is now moving east of the area with -shra activity quickly winding
down. Winds are switching NW and drier air is filtering in.

Question is what will be left in terms of low clouds for the early
morning hours. Best guidance currently suggests any morning cigs
should quickly mix out with strong boundary layer winds and drying
airmass.

Vicinity of ksfo... Northwest winds have arrive and rain should now
be done for the night. MVFR CIGS forecast to mix out by 16z.

Medium confidence.

Sfo bridge approach... Similar to ksfo.

Monterey bay terminals... Showers quickly moving eastward.

Lingering boundary layer moisture and MVFR CIGS should mix out by
15-16z Monday.

Marine As of 9:00 pm pdt Sunday... Winds will continue to
switch to the northwest overnight as a weak cold front passes
through the waters. Northwest winds will increase Monday afternoon
through Tuesday as a strong surface pressure gradient sets up
across the region. At the same time a building northwest swell
will pass through the waters but become messy in the near shore
waters due to the strong winds. Typical gusty spring time
northwest winds will continue at least through midweek and likely
through Friday as the next weather system will likely increase the
surface pressure gradient once again.

Mtr watches/warnings/advisories
Tngt None.

Public forecast: canepa
aviation: rww
marine: rww
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 mi68 min 55°F6 ft
46026 - SAN FRANCISCO - 18NM West of San Francisco, CA 9 mi48 min NW 16 G 19 55°F 55°F6 ft1020.4 hPa (+1.1)
FTPC1 - 9414290 - San Francisco, CA 11 mi50 min W 6 G 9.9 53°F 56°F1020.5 hPa
PXSC1 15 mi50 min 54°F 47°F
RCMC1 - 9414863 - Richmond, CA 17 mi50 min NW 8.9 G 14 53°F 57°F1019.8 hPa
OMHC1 - 9414769 - Oakland Middle Harbor Met, CA 18 mi50 min N 4.1 G 6
PPXC1 - 9414847 - Richmond (Point Potrero), CA 18 mi50 min W 5.1 G 8 54°F 1020.4 hPa
OKXC1 - 9414776 - Oakland (Berth 34), CA 18 mi50 min NW 4.1 G 6 54°F 1020.3 hPa
OBXC1 18 mi50 min 55°F 46°F
AAMC1 - 9414750 - Alameda, CA 20 mi50 min WNW 5.1 G 7 54°F 59°F1020.6 hPa
LNDC1 21 mi50 min NNW 2.9 G 5.1 54°F 1020.2 hPa
DPXC1 - 9415141 - Davis Point, San Pablo Bay, CA 29 mi50 min WNW 8.9 G 11 53°F 1019.7 hPa
46012 - HALF MOON BAY - 24NM South Southwest of San Francisco, CA 31 mi48 min NNW 14 G 16 55°F 55°F6 ft1020.2 hPa (+0.6)
RTYC1 - 9414523 - Redwood City, CA 31 mi50 min W 6 G 8 54°F 60°F1020 hPa
UPBC1 34 mi50 min W 13 G 17
MZXC1 - 9415102 - Martinez-Amorco CA 34 mi50 min W 8.9 G 14 54°F 57°F1019.9 hPa50°F
PCOC1 - 9415144 - Port Chicago, CA 38 mi50 min W 16 G 18 53°F 56°F1019.5 hPa
46214 - Point Reyes, CA (029) 44 mi46 min 55°F7 ft
SFXC1 - San Francisco Bay Reserve, CA 45 mi113 min WNW 8 51°F 1019 hPa49°F
PSBC1 - 9415115 - Pittsburg (Suisun Bay), CA 45 mi50 min W 8 G 14 53°F 1019.2 hPa
46013 - Bodega Bay - 48NM North Northwest of San Francisco, CA 46 mi38 min NW 16 G 19 54°F 55°F1020.5 hPa (+0.8)49°F

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 mi42 minWNW 810.00 miMostly Cloudy52°F46°F83%1020.4 hPa
Half Moon Bay Airport, CA21 mi43 minNNW 97.00 miMostly Cloudy54°F48°F82%1021 hPa
Oakland, Metro Oakland International Airport, CA24 mi45 minWNW 1110.00 miA Few Clouds54°F48°F83%1020.4 hPa

Wind History from SFO (wind in knots)
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Last 24hrS5S5SW4SW3SE4S3SE5E7E11E9S6S12S11S12S15S14S8W10W16W14W9W12W13W8
1 day agoW5NW6NE4N7CalmNE3N3N5W11W10W8W10W13W15W18W18W18W15W14W11W7W63S4
2 days agoSE4SE6SE10SE13SE12SE14SE14SE12SE14SE9NE5E3E8NE4NE3W3W5NW4NW3CalmCalmW4W5NW8

Tide / Current Tables for San Francisco Bar, California
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San Francisco Bar
Click for Map
Mon -- 05:04 AM PDT     0.87 feet Low Tide
Mon -- 07:00 AM PDT     Moonrise
Mon -- 07:02 AM PDT     Sunrise
Mon -- 11:23 AM PDT     5.51 feet High Tide
Mon -- 05:21 PM PDT     0.18 feet Low Tide
Mon -- 07:18 PM PDT     Moonset
Mon -- 07:29 PM PDT     Sunset
Mon -- 07:59 PM PDT     New Moon
Mon -- 11:54 PM PDT     5.55 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
5.24.53.32.11.20.91.11.92.944.95.55.44.63.420.80.20.312.13.34.45.3

Tide / Current Tables for South Channel, San Francisco Bay Approach, California Current
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South Channel
Click for Map
Mon -- 12:34 AM PDT     -0.00 knots Slack
Mon -- 03:10 AM PDT     -1.65 knots Max Ebb
Mon -- 06:20 AM PDT     0.01 knots Slack
Mon -- 07:00 AM PDT     Moonrise
Mon -- 07:02 AM PDT     Sunrise
Mon -- 09:16 AM PDT     1.53 knots Max Flood
Mon -- 12:43 PM PDT     -0.00 knots Slack
Mon -- 03:29 PM PDT     -1.84 knots Max Ebb
Mon -- 06:42 PM PDT     0.00 knots Slack
Mon -- 07:18 PM PDT     Moonset
Mon -- 07:28 PM PDT     Sunset
Mon -- 07:59 PM PDT     New Moon
Mon -- 09:39 PM PDT     1.59 knots Max Flood
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
0.4-0.4-1.2-1.6-1.5-1-0.30.51.21.51.41.10.5-0.3-1.2-1.8-1.8-1.3-0.60.211.51.61.3

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 (6,6,7,8)
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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.