Monday, June26, 2017 L-36.com


Marine Weather and Tides
Muir Beach, CA

Version 3.4
What's New / NOTES
6/25/2017 - NOAA is having a major issue that impact the 7 day forecast load times. Many users are reporting problems. The issue has been reported.
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 8:37PM Monday June 26, 2017 10:12 AM PDT (17:12 UTC) Moonrise 7:50AMMoonset 10:00PM Illumination 7% Phase: Waxing Crescent; Moon at 3 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- 920 Am Pdt Mon Jun 26 2017
Today..W winds 5 to 15 kt. Wind waves 1 to 3 ft. SWell sw 3 to 5 ft at 14 seconds.
Tonight..W winds 5 to 15 kt. Wind waves 1 to 3 ft. SWell sw 3 to 5 ft at 15 seconds. Patchy fog after midnight.
Tue..W winds 5 to 15 kt. Wind waves 1 to 3 ft. NW swell 2 ft at 10 seconds and sw 3 to 5 ft at 14 seconds. Patchy fog in the morning.
Tue night..NW winds 5 to 15 kt. Wind waves 1 to 3 ft. NW swell 2 to 3 ft at 9 seconds and sw 3 to 4 ft at 14 seconds. Patchy fog after midnight.
Wed..NW winds 10 to 20 kt. Wind waves 2 to 4 ft. NW swell 2 to 4 ft at 9 seconds. SWell sw 3 ft. Patchy fog in the morning. Patchy fog after midnight.
Thu..NW winds 15 to 25 kt. Wind waves 3 to 5 ft. NW swell 2 to 4 ft. Patchy fog.
Fri..NW winds 20 to 30 kt. Wind waves 3 to 5 ft. NW swell 5 to 7 ft. Patchy fog.
...san francisco bar/fourfathom bank forecast..... In the deep water channel...combined seas 2 to 4 ft with a dominant swell period of 14 seconds. Across the bar...combined seas 3 to 5 ft with a dominant swell period of 14 seconds. Maximum ebb current of 1 knots at 06:06 pm Monday and 1.9 knots at 05:30 am Tuesday.
PZZ500 920 Am Pdt Mon Jun 26 2017
Synopsis for the central california coast and bays including the Monterey bay..Greater farallones...and cordell bank national marine sanctuaries... High pressure remains located over the eastern pacific. Locally gusty winds are forecast along the immediate coast and in san francisco bay today. A dominant southerly swell will persist into Wednesday morning.

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 261537
afdmtr
area forecast discussion
national weather service san francisco bay area
837 am pdt Mon jun 26 2017

Synopsis Onshore wind flow today will lead to cooler
conditions through Tuesday. Modest warming is expected during the
second half of the week, however highs will fall well short of
the recent heatwave.

Discussion As of 8:37 am pdt Monday... Completed a minor
forecast grid update to account for current sky cover which is
showing mostly clear conditions for santa cruz monterey and san
benito while a deep marine layer over the bay area allowed low
clouds to push into the far east bay valleys early this morning.

Onshore gradients are around 2 mb at this hour but winds out in
the delta are howling with travis afb currently sustained at 23 kt
from the southwest and gusting to 29 kt. This will keep a cool
onshore wind flow in place today into Tuesday as a weak shortwave
moves onshore near the oregon border. Still expect morning clouds
to slowly mix out and burn back to the coast.

Forecast for the upcoming work week looks benign and seasonable
with a zonal flow aloft in place. Expect seasonable daytime highs
through midweek then perhaps slight warming later in the week
before the next trough arrives Friday Saturday with a cooling
trend.

Prev discussion As of 3:00 am pdt Monday... Clouds mostly
cleared from our CWA later yesterday but satellite shows that they
have returned to san mateo county northward. Clouds are
continuing to stream to the southeast and will be down into
monterey county by sunrise. Patchy fog and drizzle can be expected
into the morning.

Synoptically the ridge of high pressure that had been overhead is
now well to the east while the onshore flow combined with a
moderate marine layer will lead to cooler conditions compared to
yesterday especially for spots away from the coast. Highs will
range from 60s near the water with mostly 70s to mid 80s inland.

In general, temperatures will be 3 to 6 degrees cooler compared to
Sunday. Similar conditions can be expected tonight into Tuesday.

By Wednesday a ridge of high pressure will rebuild into the
pacific and toward our region. This will lead to slight warming
into Thursday. Inland highs will return to the upper 70s to lower
90s with coastal spots in the 60s to the mid 70s. Those
temperatures will hold into early next week and possibly into the
following week.

Aviation As of 06:35 am pdt Monday... Quick update to the
morning forecast. As mentioned before the non-typical marine layer
is eroding quickly around the bay. Possible right exit of upper
jet with subsidence may be to blame. None the less. Koak is now
vfr. Will keep sfo as a mixed bkn but conf is low.

Vicinity of ksfo... MVFR CIGS around sfo this morning. Based on
timing of yesterday and model guidance today will keep the 17-18z
clearing. Conf is low to moderate.

Sfo bridge approach... Similar to ksfo.

Monterey bay terminals...VFR. CIGS return tonight.

Marine As of 08:23 am pdt Monday... Light to moderate northerly
winds will persist over the coastal waters as high pressure
remains over the eastern pacific. Locally stronger winds will be
possible along the immediate coast and in san francisco bay. A
dominant southerly swell will persist into Wednesday morning.

Mtr watches warnings advisories
Tday Sca... Sf bay from 1 pm
sca... Mry bay from 1 pm
sca... Pigeon pt to pt pinos 0-10 nm from 1 pm
sca... Pt pinos to pt piedras blancas 0-10 nm
public forecast: rww
aviation: mm
marine: canepa
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 mi42 min 58°F3 ft
46026 - SAN FRANCISCO - 18NM West of San Francisco, CA 9 mi82 min W 3.9 G 3.9 58°F 57°F3 ft1017.6 hPa (+1.0)
FTPC1 - 9414290 - San Francisco, CA 11 mi42 min W 6 G 8 60°F 60°F1017.6 hPa
TIBC1 - Tiburon Pier, San Francisco Bay, CA 14 mi80 min E 4.1 61°F 1017 hPa (+1.0)
PXOC1 - 9414311 - San Francisco (Pier 1), CA 15 mi48 min W 6 G 12 62°F 1016.2 hPa
PXSC1 15 mi42 min 62°F 55°F
RCMC1 - 9414863 - Richmond, CA 17 mi42 min SE 1.9 G 4.1 63°F 63°F1017 hPa
OMHC1 - 9414769 - Oakland Middle Harbor Met, CA 18 mi42 min W 9.9 G 12
PPXC1 - 9414847 - Richmond (Point Potrero), CA 18 mi42 min SW 2.9 G 4.1 65°F 1017.5 hPa
OBXC1 18 mi42 min 62°F 56°F
OKXC1 - 9414776 - Oakland (Berth 34), CA 18 mi42 min W 8.9 G 11 62°F 1017.2 hPa
AAMC1 - 9414750 - Alameda, CA 20 mi42 min WNW 5.1 G 8 64°F 67°F1017.7 hPa
LNDC1 21 mi66 min W 7 G 11 62°F 1017.2 hPa
PRYC1 - 9415020 - Point Reyes, CA 22 mi42 min NW 8 G 9.9 61°F 55°F1017.2 hPa
DPXC1 - 9415141 - Davis Point, San Pablo Bay, CA 29 mi42 min W 8 G 12 62°F 1016.8 hPa
RTYC1 - 9414523 - Redwood City, CA 31 mi42 min NW 6 G 7 64°F 73°F1016.8 hPa
46012 - HALF MOON BAY - 24NM South Southwest of San Francisco, CA 31 mi82 min Calm G 1.9 58°F 58°F3 ft1017.2 hPa (+1.0)
UPBC1 34 mi42 min WNW 14 G 17
MZXC1 - 9415102 - Martinez-Amorco CA 34 mi42 min W 14 G 17 62°F 69°F1017 hPa58°F
PCOC1 - 9415144 - Port Chicago, CA 38 mi42 min WSW 16 G 20 62°F 69°F1016.5 hPa
46214 - Point Reyes, CA (029) 44 mi42 min 56°F3 ft
SFXC1 - San Francisco Bay Reserve, CA 45 mi87 min WNW 16 61°F 1016 hPa56°F
PSBC1 - 9415115 - Pittsburg (Suisun Bay), CA 45 mi42 min WNW 15 G 20 64°F 1015.9 hPa
46013 - Bodega Bay - 48NM North Northwest of San Francisco, CA 46 mi32 min W 1.9 G 3.9 57°F 54°F1017.9 hPa54°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 mi76 minW 910.00 miMostly Cloudy66°F52°F61%1017.1 hPa
Half Moon Bay Airport, CA21 mi17 minNW 78.00 miOvercast61°F55°F83%1017.9 hPa
Oakland, Metro Oakland International Airport, CA24 mi19 minWNW 910.00 miOvercast67°F55°F66%1017.4 hPa

Wind History from SFO (wind in knots)
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Last 24hrW13W17W15W17W18W19W18W21W18W17
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1 day agoNW11NW15NW15NW15NW20NW20
G24
W20W19W22W21W17W19W17W165W15W14W12W8W9SW5W10W9W7W11
2 days agoNE6N9N8N8NW14NW20W20W19W21W18W19
G23
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Tide / Current Tables for San Francisco Bar, California
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San Francisco Bar
Click for Map
Mon -- 12:37 AM PDT     6.45 feet High Tide
Mon -- 05:50 AM PDT     Sunrise
Mon -- 07:25 AM PDT     -1.52 feet Low Tide
Mon -- 08:50 AM PDT     Moonrise
Mon -- 02:38 PM PDT     5.12 feet High Tide
Mon -- 07:34 PM PDT     2.38 feet Low Tide
Mon -- 08:36 PM PDT     Sunset
Mon -- 10:59 PM PDT     Moonset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
6.36.45.74.42.50.7-0.7-1.5-1.4-0.70.41.73.14.255.14.63.832.52.42.93.74.6

Tide / Current Tables for South Channel, San Francisco Bay Approach, California Current
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South Channel
Click for Map
Mon -- 01:59 AM PDT     -0.00 knots Slack
Mon -- 05:12 AM PDT     -2.32 knots Max Ebb
Mon -- 05:50 AM PDT     Sunrise
Mon -- 08:46 AM PDT     0.00 knots Slack
Mon -- 08:50 AM PDT     Moonrise
Mon -- 11:52 AM PDT     1.83 knots Max Flood
Mon -- 03:40 PM PDT     -0.01 knots Slack
Mon -- 05:52 PM PDT     -1.18 knots Max Ebb
Mon -- 08:36 PM PDT     Sunset
Mon -- 08:50 PM PDT     0.01 knots Slack
Mon -- 10:59 PM PDT     Moonset
Mon -- 11:39 PM PDT     1.23 knots Max Flood
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
1.10.7-0-1-1.9-2.3-2.1-1.6-0.80.21.11.71.81.61.20.5-0.3-1-1.2-0.9-0.50.10.71.1

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 (13,3,4,5)
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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.