Monday, December11, 2017 L-36.com


Marine Weather and Tides
Belvedere, 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 7:14AMSunset 4:52PM Monday December 11, 2017 2:36 PM PST (22:36 UTC) Moonrise 12:55AMMoonset 1:26PM Illumination 40% Phase: Third Quarter Moon; Moon at 23 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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PZZ530 San Pablo Bay Suisun Bay The West Delta And San Francisco Bay North Of The Bay Bridge- 211 Pm Pst Mon Dec 11 2017
Tonight..NE winds 10 kt.
Tue..NE winds 10 kt.
Tue night..NE winds 10 kt.
Wed..NE winds 10 kt.
Wed night..NE winds 10 kt.
Thu..NE winds 10 kt.
Fri..NW winds 5 kt.
Sat..SW winds 5 kt.
PZZ500 211 Pm Pst Mon Dec 11 2017
Synopsis for the central california coast and bays including the Monterey bay..Greater farallones...and cordell bank national marine sanctuaries... Light to moderate winds will continue along the central coast as high pressure remains over the region. Winds will gradually increase out of the north midweek. A longer period swell arrived today and will impact the coast thru midweek.

7 Day Forecast for Marine Location Near Belvedere, CA
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location: 37.83, -122.44     debug


Area Discussion for - San Francisco/Monterey Bay Area, CA
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Fxus66 kmtr 112211
afdmtr
area forecast discussion
national weather service san francisco bay area
211 pm pst Mon dec 11 2017

Synopsis Strong high pressure will remain in place through much
of the week and result in dry weather conditions along with above
average daytime temperatures. Clear skies and weak offshore flow
will allow for cool overnights which will warm slightly late in the
forecast period as onshore winds return.

Discussion As of 01:49 pm pst Monday... A strong ridge of high
pressure continues to dominate the weather pattern across the
entire west coast and will do so through much of the forecast
period. This has resulted in continued dry weather conditions and
above average temperatures. Meanwhile, upper level flow will
continue to advect smoke from wildfires over southern california
today and potentially into tomorrow as well. While some smoke will
be noticeable to the generally public, the heaviest concentration
of smoke will remain above the surface in the higher levels of
the atmosphere. Look for afternoon temperatures to warm into the
60s for the san francisco bay area and points northward while the
south bay down through the central coast will experience
widespread 70s.

A storm system is then forecast to approach the pacific northwest
late in the week and will help to weaken the ridge slightly. This
will allow for daytime temperatures to cool by a few degrees late in
the week and into the upcoming weekend with a slight increase in
overnight temperatures as onshore flow returns. Precipitation with
this system will stay well to the north however with ongoing dry
conditions for california.

Longer range guidance suggest a potential change in the weather
pattern sometime next week that might bring light precipitation to
portions of the state. However, confidence is low at this time
and will need to be monitored in the coming days. Until then, look
for ongoing dry weather conditions and above average daytime
temperatures to persist.

Aviation As of 9:39 am pst Monday... For 18z tafs. Upper level
winds continue to bring smoke from the southern california fires
northward across the forecast area resulting in a broken to
scattered cloud deck around 20k to 25k feet. This smoke layer will
persist through much of the day then hopefully clear out
overnight. OtherwiseVFR conditions and light winds will prevail.

Patchy fog and low clouds will return tonight over ksts.

High confidence.

Vicinity of ksfo...VFR. Light offshore winds expected through the
forecast period.

Sfo bridge approach... Similar to ksfo.

Monterey bay terminals...VFR. Generally light offshore winds.

Marine As of 2:10 pm pst Monday... Light to moderate winds will
continue along the central coast as high pressure remains over
the region. Winds will gradually increase out of the north
midweek. A longer period swell arrived today and will impact the
coast thru midweek.

Mtr watches warnings advisories
Tngt None.

Public forecast: rgass
aviation marine: cw
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Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
FTPC1 - 9414290 - San Francisco, CA 2 mi48 min ENE 6 G 8.9
PXSC1 3 mi48 min 58°F
TIBC1 - Tiburon Pier, San Francisco Bay, CA 4 mi57 min NW 8 59°F 1025 hPa
OBXC1 6 mi48 min 59°F
OMHC1 - 9414769 - Oakland Middle Harbor Met, CA 6 mi48 min SW 4.1 G 5.1
OKXC1 - 9414776 - Oakland (Berth 34), CA 6 mi48 min S 2.9 G 4.1 61°F 1024.8 hPa
RCMC1 - 9414863 - Richmond, CA 7 mi48 min NE 8.9 G 12
PPXC1 - 9414847 - Richmond (Point Potrero), CA 7 mi48 min E 2.9 G 9.9 69°F 1025.1 hPa
AAMC1 - 9414750 - Alameda, CA 8 mi48 min SE 1 G 1.9
LNDC1 9 mi48 min SSW 1.9 G 4.1 61°F 1024.8 hPa
46237 - San Francisco Bar, CA (142) 11 mi66 min 54°F4 ft
DPXC1 - 9415141 - Davis Point, San Pablo Bay, CA 18 mi48 min E 7 G 8.9 60°F 1025.2 hPa
MZXC1 - 9415102 - Martinez-Amorco CA 22 mi48 min ENE 6 G 8 60°F 54°F1025.7 hPa
46026 - SAN FRANCISCO - 18NM West of San Francisco, CA 22 mi46 min E 14 G 18 59°F 55°F5 ft1023.9 hPa (-1.2)
RTYC1 - 9414523 - Redwood City, CA 25 mi48 min E 2.9 G 2.9 64°F 54°F1025.2 hPa
PCOC1 - 9415144 - Port Chicago, CA 26 mi48 min E 8 G 11 60°F 53°F1025.4 hPa
PRYC1 - 9415020 - Point Reyes, CA 31 mi48 min Calm G 1.9 55°F1023.4 hPa
PSBC1 - 9415115 - Pittsburg (Suisun Bay), CA 33 mi48 min S 5.1 G 6 59°F 1025.7 hPa
SFXC1 - San Francisco Bay Reserve, CA 34 mi111 min E 8.9 61°F 1026 hPa33°F
46012 - HALF MOON BAY - 24NM South Southwest of San Francisco, CA 40 mi46 min NNE 1.9 G 3.9 58°F 55°F6 ft1023.3 hPa (-1.1)

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, CA15 mi40 minN 010.00 miFair61°F41°F48%1024.8 hPa
Oakland, Metro Oakland International Airport, CA15 mi43 minW 310.00 miMostly Cloudy57°F41°F55%1025 hPa
Hayward, Hayward Air Terminal, CA21 mi42 minWNW 410.00 miFair66°F33°F29%1025.7 hPa
Half Moon Bay Airport, CA22 mi41 minNE 410.00 miFair73°F33°F23%1022.7 hPa
Novato / Gnoss Field, CA23 mi61 minVar 410.00 miFair63°F35°F37%1025.7 hPa
San Carlos Airport, CA23 mi46 minN 010.00 miMostly Cloudy66°F37°F35%1024.7 hPa
Concord, Buchanan Field, CA23 mi43 minNNE 710.00 miFair66°F33°F29%1024.3 hPa

Wind History from SFO (wind in knots)
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Last 24hrN4CalmE3SE4SE3S4CalmSE3S3S4S3S4CalmSW3S3S4SE3Calm--E4E4E4CalmCalm
1 day agoCalmCalmSE4E7E9SE5E5SE4SE4SE4SE4S3CalmS3SW3CalmSE4SE5SE6SE6E4E5NE3Calm
2 days agoNE3CalmS3S5CalmSE4CalmCalmCalmCalmCalmSW3S3CalmCalmCalmCalmS3CalmE4CalmN4CalmCalm

Tide / Current Tables for Alcatraz Island, San Francisco Bay, California
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Alcatraz Island
Click for Map
Mon -- 12:54 AM PST     Moonrise
Mon -- 06:51 AM PST     5.84 feet High Tide
Mon -- 07:15 AM PST     Sunrise
Mon -- 01:07 PM PST     1.51 feet Low Tide
Mon -- 01:25 PM PST     Moonset
Mon -- 04:50 PM PST     Sunset
Mon -- 06:57 PM PST     4.31 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
0.71.11.82.83.94.95.65.85.54.63.52.51.81.51.72.22.93.64.14.34.13.42.61.8

Tide / Current Tables for Alcatraz Island W, San Francisco Bay, California Current
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Alcatraz Island W
Click for Map
Mon -- 12:54 AM PST     Moonrise
Mon -- 01:21 AM PST     0.00 knots Slack
Mon -- 04:38 AM PST     2.67 knots Max Flood
Mon -- 07:15 AM PST     Sunrise
Mon -- 07:58 AM PST     -0.00 knots Slack
Mon -- 10:53 AM PST     -1.90 knots Max Ebb
Mon -- 01:25 PM PST     Moonset
Mon -- 02:21 PM PST     0.00 knots Slack
Mon -- 04:50 PM PST     Sunset
Mon -- 05:19 PM PST     1.99 knots Max Flood
Mon -- 08:16 PM PST     -0.00 knots Slack
Mon -- 10:56 PM PST     -1.69 knots Max Ebb
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
-1.2-0.40.822.62.62.31.3-0-1.1-1.8-1.9-1.7-1.3-0.40.81.621.91.40.3-0.8-1.5-1.7

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 (17,4,5,8)
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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.