Friday, May26, 2017 L-36.com


Marine Weather and Tides
Belvedere, 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 5:49AMSunset 8:23PM Friday May 26, 2017 5:26 PM PDT (00:26 UTC) Moonrise 5:57AMMoonset 8:32PM Illumination 2% Phase: Waxing Crescent; Moon at 1 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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PZZ531 San Francisco Bay South Of The Bay Bridge- 216 Pm Pdt Fri May 26 2017
Tonight..W winds 5 to 15 kt. Patchy fog after midnight.
Sat..W winds 10 kt...increasing to 10 to 20 kt in the afternoon. Patchy fog in the morning.
Sat night..W winds 5 to 15 kt.
Sun..W winds 10 to 20 kt.
Sun night..W winds 10 to 20 kt.
Memorial day..W winds 5 to 15 kt.
Tue..W winds 5 to 15 kt.
Wed..W winds 5 to 15 kt.
PZZ500 216 Pm Pdt Fri May 26 2017
Synopsis for the central california coast and bays including the Monterey bay..Greater farallones...and cordell bank national marine sanctuaries... Light to locally moderate northerly winds will prevail along the coast through early Saturday. High pressure will build over the eastern pacific this weekend resulting in increasing winds and steeper wind waves.

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 262346
afdmtr
area forecast discussion
national weather service san francisco bay area
446 pm pdt Fri may 26 2017

Synopsis Deep marine layer with nearly all areas starting the
day cloudy which will keep temperatures on the cool side of normal
today. Saturday will trend back towards seasonable temperatures as
high pressure begins to build. Dry and warmer Sunday and Monday.

Another trough begins to approach by Tuesday and Wednesday with a
modest cooling trend and continued coastal clouds.

Discussion As of 1:43 pm pdt Friday... Overcast skies blanketed
much of central california this morning and early afternoon with
the marine layer exceeding 4000 ft. Visible satellite showed the
cloud cover extending along the central coast and going as far
inland as the san joaquin valley and pushing up against the
southern sierra foothills. The clouds have been slow to erode away
again today; some areas along the coast may not see the sunshine
at all. Temperatures will be relatively cool for interior
locations where today's afternoon highs will range from about 5 to
15 degrees below late may climatological normals.

At the present a trough axis extends from the intermountain west
southwestward through central california. This trough will shift
east into the great plains over the next 24 to 36 hours. Meanwhile
a ridge will amplify off the west coast and will allow for
temperatures to begin an upward trend through the holiday weekend.

Saturday's high temperatures for the interior will range from the
upper 60s to around 80, while locations along the coast will
remain marine-influenced in the mid 50s to mid 60s. Inland areas
will warm by about 2-7 degrees from Saturday to Sunday, and
several additional degrees from Sunday to memorial day. By this
point most inland locations will be within 2-4 degrees of normal.

The exception would be the southern salinas valley and parts of
san benito county where guidance suggests temperatures will reach
the 90s by Sunday. If you have travel plans over the holiday
weekend, we encourage you to visit weather.Gov for the latest
forecast for your travel destination.

From Tuesday to Wednesday the ridge will shift eastward into the
great basin and will allow for temperatures to moderate a bit as a
weak trough moves onshore. 12z ECMWF is trying to paint some very
light QPF over parts of the area on Wednesday, but confidence is
low and will keep pops less than 10 percent at this time.

Looking ahead to the beginning of june, the climate prediction
center's 6 to 10 day temperature outlook (valid june 1 to 5) gives
much of central and northern california an increased chance of
experiencing above normal temperatures.

Aviation As of 4:45 pm pdt Friday... Low clouds have been slow
to clear on Friday afternoon and likely will not clear in some
areas. Expect widespread MVFR conditions in all areas by mid
evening and continuing through late Saturday morning. Weak low
pressure offshore will maintain light southerly winds this
evening. Winds will turn to a more typical west to northwest
direction by Saturday afternoon.

Vicinity of ksfo... MVFR ceilings likely through late Friday
morning, although low clouds may briefly scatter out early in
period.VFR conditions expected to return by 17z Saturday. Light
southwest winds overnight will turn to the west by midday Saturday
and increase Saturday afternoon.

Sfo bridge approach... Similar to terminal.

Monterey bay terminals... MVFR ceilings likely through the period,
although low clouds may scatter out on Saturday afternoon for a
few hours. Light southwest to south winds through early Saturday
morning then becoming light westerly.

Marine As of 08:48 am pdt Friday... Weak high pressure offshore
will result in relatively light winds and small seas along the
central coast. High pressure will increase over the weekend with
increasing winds on Saturday and lasting through the memorial
day.

Mtr watches warnings advisories
Tngt Sca... Sf bay until 9 pm
public forecast: rowe
aviation: dykema
marine: mm
visit us at

Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
FTPC1 - 9414290 - San Francisco, CA 2 mi38 min WSW 7 G 14 57°F 55°F1016.4 hPa
PXOC1 - 9414311 - San Francisco (Pier 1), CA 3 mi38 min W 9.9 G 15 59°F 1015.1 hPa
PXSC1 3 mi38 min 60°F 47°F
TIBC1 - Tiburon Pier, San Francisco Bay, CA 4 mi49 min Calm 59°F 1016 hPa
OKXC1 - 9414776 - Oakland (Berth 34), CA 6 mi38 min W 11 G 13 60°F 1016 hPa
OBXC1 6 mi38 min 59°F 49°F
OMHC1 - 9414769 - Oakland Middle Harbor Met, CA 6 mi38 min WSW 13 G 17
RCMC1 - 9414863 - Richmond, CA 7 mi38 min SW 6 G 11 59°F 57°F1015.9 hPa
PPXC1 - 9414847 - Richmond (Point Potrero), CA 7 mi38 min SW 9.9 G 13 61°F 1016.3 hPa
AAMC1 - 9414750 - Alameda, CA 8 mi38 min W 7 G 12 61°F 62°F1016.4 hPa
LNDC1 9 mi38 min W 9.9 G 13 60°F 1016 hPa
46237 - San Francisco Bar, CA (142) 11 mi56 min 56°F4 ft
DPXC1 - 9415141 - Davis Point, San Pablo Bay, CA 18 mi38 min WSW 13 G 17 61°F 1015.3 hPa
UPBC1 22 mi38 min W 13 G 16
46026 - SAN FRANCISCO - 18NM West of San Francisco, CA 22 mi36 min SW 9.7 G 9.7 55°F 56°F4 ft1016.4 hPa (+0.0)
MZXC1 - 9415102 - Martinez-Amorco CA 22 mi38 min WSW 12 G 15 62°F 64°F1015.6 hPa52°F
RTYC1 - 9414523 - Redwood City, CA 25 mi38 min S 7 G 9.9 63°F 67°F1014.9 hPa
PCOC1 - 9415144 - Port Chicago, CA 26 mi38 min W 14 G 15 62°F 65°F1015.2 hPa
PRYC1 - 9415020 - Point Reyes, CA 31 mi38 min SE 2.9 G 7 58°F 55°F1015.9 hPa
PSBC1 - 9415115 - Pittsburg (Suisun Bay), CA 33 mi38 min NNW 13 G 16 64°F 1014.9 hPa
SFXC1 - San Francisco Bay Reserve, CA 34 mi101 min WNW 9.9 65°F 1016 hPa52°F
46012 - HALF MOON BAY - 24NM South Southwest of San Francisco, CA 40 mi36 min SSW 5.8 G 7.8 56°F 56°F6 ft1016.1 hPa (+0.0)

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, CA15 mi30 minSSW 1710.00 miMostly Cloudy63°F46°F56%1015.6 hPa
Oakland, Metro Oakland International Airport, CA15 mi33 minW 1310.00 miMostly Cloudy64°F48°F58%1016 hPa
Hayward, Hayward Air Terminal, CA21 mi32 minWSW 710.00 miMostly Cloudy65°F46°F52%1016.5 hPa
Half Moon Bay Airport, CA22 mi31 minSW 68.00 miOvercast57°F50°F77%1016.6 hPa
Novato / Gnoss Field, CA23 mi31 minVar 410.00 miMostly Cloudy66°F48°F52%1015.9 hPa
San Carlos Airport, CA23 mi96 minSW 710.00 miMostly Cloudy64°F48°F56%1015.9 hPa
Concord, Buchanan Field, CA23 mi33 minW 1210.00 miMostly Cloudy68°F48°F51%1013.8 hPa

Wind History from OAK (wind in knots)
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Last 24hrSW17SW18SW16SW12SW12SW11SW11SW11SW13SW13SW15SW14SW14SW15SW13SW12W8W6W7W10W10W11W12W13
1 day agoNW11NW7W9W9W7SW14SW17SW14SW20
G26
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G24
SW13SW12SW15SW15SW19SW17SW20SW18SW21SW21
G26
2 days agoW17
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W17NW12NW9NW5NW10NW7NW7W9W9W11NW6W5W6NW6W4W53NW8NW11NW13NW14NW13W13

Tide / Current Tables for Alcatraz Island, San Francisco Bay, California
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Alcatraz Island
Click for Map
Fri -- 12:08 AM PDT     6.70 feet High Tide
Fri -- 05:51 AM PDT     Sunrise
Fri -- 06:51 AM PDT     -1.68 feet Low Tide
Fri -- 06:57 AM PDT     Moonrise
Fri -- 01:56 PM PDT     4.99 feet High Tide
Fri -- 06:44 PM PDT     1.98 feet Low Tide
Fri -- 08:22 PM PDT     Sunset
Fri -- 09:32 PM PDT     Moonset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
6.76.45.33.61.6-0.2-1.4-1.7-1.2-0.21.12.53.84.754.63.82.82.122.53.44.55.6

Tide / Current Tables for Alcatraz Island W, San Francisco Bay, California Current
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Alcatraz Island W
Click for Map
Fri -- 01:35 AM PDT     -0.00 knots Slack
Fri -- 04:49 AM PDT     -3.64 knots Max Ebb
Fri -- 05:51 AM PDT     Sunrise
Fri -- 06:57 AM PDT     Moonrise
Fri -- 08:19 AM PDT     0.00 knots Slack
Fri -- 11:27 AM PDT     3.86 knots Max Flood
Fri -- 03:09 PM PDT     -0.00 knots Slack
Fri -- 05:24 PM PDT     -1.95 knots Max Ebb
Fri -- 08:15 PM PDT     0.00 knots Slack
Fri -- 08:22 PM PDT     Sunset
Fri -- 09:32 PM PDT     Moonset
Fri -- 11:14 PM PDT     2.79 knots Max Flood
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
2.10.9-0.6-2.1-3.3-3.6-3-1.9-0.51.32.93.83.83.11.90.3-1.1-1.9-1.8-1.2-0.312.22.8

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 (20,4,5,8)
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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.