Friday, October19, 2018 L-36.com


Marine Weather and Tides
Belvedere, CA

Version 3.4
What's New / NOTES
10/6/2018 Colors of tide XTide graphs changed to emphasize that they were upgraded. See next note. Comments welcome.
10/4/2018 I have fixed XTide and updated the harmonic files. There were some name changes so you might have to click EDIT to find the new station name.

Sunrise 7:21AMSunset 6:27PM Friday October 19, 2018 6:43 AM PDT (13:43 UTC) Moonrise 3:17PMMoonset 1:19AM Illumination 76% Phase: Waxing Gibbous; Moon at 10 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- 305 Am Pdt Fri Oct 19 2018
Today..NW winds around 5 kt...increasing to 5 to 10 kt this afternoon.
Tonight..W winds 5 to 15 kt.
Sat..NW winds 5 to 10 kt.
Sat night..NW winds 5 to 15 kt.
Sun..NW winds 5 to 15 kt.
Sun night..W winds 5 to 15 kt.
Mon..W winds 5 to 10 kt.
Tue..W winds up to 10 kt.
PZZ500 305 Am Pdt Fri Oct 19 2018
Synopsis for the central california coast and bays including the Monterey bay..Greater farallones...and cordell bank national marine sanctuaries... Generally light to locally breezy northwest winds through the weekend. The strongest winds will be along the santa cruz and big sur coastal jets during the afternoon hours. A mixed moderate to longer period swell through the day.


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 191159
afdmtr
area forecast discussion
national weather service san francisco bay area
459 am pdt Fri oct 19 2018

Synopsis Sunny and warm today with a only a few degrees of
cooling through the weekend. More noted cooling returns early
next week as fronts pass to our north with increasing onshore flow
and a cooling airmass. Any light rain will likely stay north of
sonoma county next week while high pressure builds over southern
and central california by the second half of next week.

Discussion As of 3:10 am pdt Friday... Night time satellite
shows most of the low clouds and fog confined to the ocean as well
as down the salinas valley with a shallow 800 foot marine layer
in place. This is producing some 1 4 mild fog at salinas
currently. Gradients are light and the marine layer is shallow so
only expect some patchy inland fog formation through sunrise with
the latest scans showing fog starting to form in the north bay
valleys.

The synoptic pattern features a building 500 mb ridge over oregon
while a weak cyclonic circulation exists over the southern
california bight. This puts the bay area and central coast firmly
in-between the two circulations with some light offshore flow and
a warm airmass. This should translate into another day of above
normal temperatures in what should be the warmest day of the next
several. Expect widespread 80s once again for inland areas with
comfy 70s around the bays with 60s confined to the immediate
beaches. Pleasant october weather to finish out the work week.

Weekend weather looks ideal for any outdoor activities. The ridge
will push east and the low over southern california will eject
northward. This will allow for more stratus formation over the
ocean with a few degrees of cooling this weekend. However, were
splitting hairs and still expect lots of 70s and 80s with even
lower 90s still possible for the hottest interior valleys.

We've been tracking some possible frontal passages across norcal
next week and not surprisingly the trends are showing decreasing
rain chances. Latest ECMWF weakens the first front Tuesday
afternoon with perhaps some north bay sprinkles while the rest of
the district will maintain dry and seasonable weather. A second
front may approach CAPE mendocino by about next Thursday but any
precip stays well north of the bay area. In fact the latest gfs
and ECMWF trends now showing a strong 590 dm plus ridge building
over southern california with a surface thermal trough across the
bay area suggesting likelihood of another round of above normal
temps which often occurs as we approach halloween.

Aviation As of 4:55 am pdt Friday... Compressed marine layer and
increased northerly gradient suppressing inland surge of stratus
deck this morning. Some low clouds are attempting to push into the
vicinity of ksts and through the golden gate gap and may spread
into the sunrise hours. Offshore winds in the salinas valley are
depleting clouds there, with clearing skies possible over
kmry ksns thru morning if winds remain offshore. Dry setup
continues tonight with generallyVFR expected. Generally light
offshore winds during am hours and occasionally breezy onshore
winds during the pm hours especially near the coast.

Vicinity of ksfo...VFR. Brief increase in clouds north of the
airport possible (few-sct 600-800ft) thru sunrise hours.

Occasionally breezy onshore pm winds.VFR tonight.

Sfo bridge approach... Same as ksfo.

Monterey bay terminals... Offshore winds have ejected low clouds
from the salinas valley into the monterey bay, thus generallyVFR
with patchy areas of fog. If winds shift onshore early this
morning, could see a brief return of low clouds thru sunrise
hours. Light winds, occasionally breezy onshore near the coast
late this afternoon.

Marine As of 04:53 am pdt Friday... Generally light to locally
breezy northwest winds through the weekend. The strongest winds
will be along the santa cruz and big sur coastal jets during the
afternoon hours. A mixed moderate to longer period swell through
the day.

Mtr watches warnings advisories
Tday None.

Public forecast: rww
aviation: drp
marine: drp
visit us at

Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
FTPC1 - 9414290 - San Francisco, CA 2 mi44 min SSW 1.9 G 4.1 54°F 61°F1020.1 hPa (+0.0)
PXOC1 - 9414311 - San Francisco (Pier 1), CA 3 mi44 min Calm G 1 56°F 1018.7 hPa (+0.0)
PXSC1 3 mi44 min 56°F 55°F
TIBC1 - Tiburon Pier, San Francisco Bay, CA 4 mi45 min W 1.9 55°F 1020 hPa
OKXC1 - 9414776 - Oakland (Berth 34), CA 6 mi44 min NW 5.1 G 5.1 56°F 1019.8 hPa (+0.0)
OBXC1 6 mi44 min 58°F 58°F
OMHC1 - 9414769 - Oakland Middle Harbor Met, CA 6 mi44 min NW 1.9 G 1.9
RCMC1 - 9414863 - Richmond, CA 7 mi44 min NNW 1.9 G 2.9 58°F 63°F1019.8 hPa (-0.0)
PPXC1 - 9414847 - Richmond (Point Potrero), CA 7 mi44 min NNE 1.9 G 2.9 57°F 1020.2 hPa (+0.3)
AAMC1 - 9414750 - Alameda, CA 8 mi44 min Calm G 1.9 56°F 64°F1020 hPa (+0.3)
LNDC1 9 mi44 min NNE 1.9 G 1.9 57°F 1019.7 hPa (+0.3)
46237 - San Francisco Bar, CA (142) 11 mi44 min 59°F5 ft
DPXC1 - 9415141 - Davis Point, San Pablo Bay, CA 18 mi44 min NNE 1 G 1.9 56°F 1019.7 hPa (+0.5)
MZXC1 - 9415102 - Martinez-Amorco CA 22 mi44 min W 5.1 G 7 58°F 64°F1019.9 hPa (+0.4)58°F
46026 - SAN FRANCISCO - 18NM West of San Francisco, CA 22 mi44 min NW 7.8 G 9.7 54°F 58°F1020.6 hPa (+0.5)
RTYC1 - 9414523 - Redwood City, CA 25 mi44 min Calm G 1 55°F 67°F1020.4 hPa (+0.3)
PCOC1 - 9415144 - Port Chicago, CA 26 mi44 min SSW 8 G 8 53°F 64°F1019.7 hPa (+0.5)
PRYC1 - 9415020 - Point Reyes, CA 31 mi44 min NW 7 G 8.9 59°F1019.7 hPa (+0.3)
PSBC1 - 9415115 - Pittsburg (Suisun Bay), CA 33 mi44 min SW 1 G 1.9 57°F 1019.4 hPa (+0.7)
SFXC1 - San Francisco Bay Reserve, CA 34 mi59 min N 1 46°F 1019 hPa

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 mi48 minW 510.00 miA Few Clouds50°F48°F96%1019.5 hPa
Oakland, Metro Oakland International Airport, CA15 mi51 minNE 310.00 miFair50°F48°F93%1019.8 hPa
Hayward, Hayward Air Terminal, CA21 mi50 minENE 310.00 miFair53°F45°F74%1020.6 hPa
Novato / Gnoss Field, CA23 mi49 minN 09.00 miA Few Clouds45°F44°F100%1020 hPa
San Carlos Airport, CA23 mi49 minN 010.00 miFair54°F50°F88%1020 hPa
Concord, Buchanan Field, CA23 mi51 minno data10.00 miFair51°F43°F74%1018.5 hPa

Wind History from OAK (wind in knots)
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Last 24hrW7CalmCalmSW4S5W6W6W8NW9W10W11NW7W9NW4NW6NW3CalmCalmE4NE3NE3NE3NE4NE3
1 day agoCalmNE3CalmCalmW4SW6W6W6NW10W11W12W14W12NW8NW6NW6NW6NW7N4CalmNE4N3N3N3
2 days agoCalmNE3CalmSE4S5SW3SW3W4NW8W11W12NW9NW8NW5NW4--N3CalmNW4NW7NW5N3N3N3

Tide / Current Tables for Alcatraz Island, San Francisco Bay, California
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Alcatraz Island
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Fri -- 02:19 AM PDT     Moonset
Fri -- 02:42 AM PDT     0.75 feet Low Tide
Fri -- 07:22 AM PDT     Sunrise
Fri -- 09:50 AM PDT     4.98 feet High Tide
Fri -- 03:28 PM PDT     2.26 feet Low Tide
Fri -- 04:16 PM PDT     Moonrise
Fri -- 06:26 PM PDT     Sunset
Fri -- 09:04 PM PDT     4.83 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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2.21.40.90.81.11.72.63.54.34.854.74.13.32.72.32.32.73.344.64.84.64

Tide / Current Tables for Alcatraz Island W, San Francisco Bay, California Current
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Alcatraz Island W
Click for Map
Fri -- 12:28 AM PDT     -1.83 knots Max Ebb
Fri -- 02:19 AM PDT     Moonset
Fri -- 04:15 AM PDT     0.00 knots Slack
Fri -- 07:22 AM PDT     Sunrise
Fri -- 07:33 AM PDT     2.24 knots Max Flood
Fri -- 10:49 AM PDT     -0.01 knots Slack
Fri -- 01:21 PM PDT     -1.30 knots Max Ebb
Fri -- 04:16 PM PDT     Moonrise
Fri -- 04:43 PM PDT     0.00 knots Slack
Fri -- 06:26 PM PDT     Sunset
Fri -- 07:33 PM PDT     1.63 knots Max Flood
Fri -- 10:30 PM PDT     -0.00 knots Slack
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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-1.8-1.8-1.5-1.1-0.20.91.72.22.21.80.9-0.2-1-1.3-1.3-1.1-0.60.31.11.61.61.30.5-0.5

Weather Map and Satellite Images
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GOES Local Image of CentralWestCoast    EDIT
NOTE: East coast views moved to GEOS-16. They are experimental and not well supported by NOAA so they may not be correct so be warned. This change required redoing a large amount of the GOES code. If the image you are expecting is not showing, please let me know. You may need to use the EDIT function to update your location.
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Wind Forecast for San Francisco/Monterey Bay Area, CA (9,2,3,4)
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Ground Weather Radar Station San Francisco Bay Area, CA
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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.