Monday, September24, 2018 L-36.com


Marine Weather and Tides
South San Francisco, CA

Version 3.4
What's New / NOTES
9/17/2018 XTide broke when 1and1 "upgraded" my server. It has been esculated. I am sorry for the problem.

Sunrise 6:58AMSunset 7:03PM Monday September 24, 2018 12:10 AM PDT (07:10 UTC) Moonrise 6:17PMMoonset 5:26AM Illumination 100% Phase: Full Moon; Moon at 14 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- 845 Pm Pdt Sun Sep 23 2018
Tonight..SW winds 5 to 15 kt.
Mon..SW winds 5 to 15 kt with gusts up to 25 kt.
Mon night..SW winds 5 to 15 kt.
Tue..SW winds 5 to 15 kt with gusts up to 25 kt.
Tue night..SW winds 5 to 15 kt with gusts up to 25 kt.
Wed..SW winds 5 to 15 kt with gusts up to 25 kt.
Thu..W winds 5 to 15 kt.
PZZ500 845 Pm Pdt Sun Sep 23 2018
Synopsis for the central california coast and bays including the Monterey bay..Greater farallones...and cordell bank national marine sanctuaries... Moderate to locally gusty northwest winds will continue in the overnight hours across the coastal waters. This will result in locally generated steep fresh swell. Winds will diminish into tomorrow morning with locally gusty northwest winds continuing north of point reyes through midday. Once winds subside, they will remain generally light through the period.


7 Day Forecast for Marine Location Near South San Francisco, CA
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location: 37.65, -122.36     debug


Area Discussion for - San Francisco/Monterey Bay Area, CA
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Fxus66 kmtr 240525
afdmtr
area forecast discussion
national weather service san francisco bay area
1025 pm pdt Sun sep 23 2018

Synopsis High pressure will begin to build over the region
through the first part of the week and result in a warming, drying
trend. This will will bring dry offshore winds at times and
increased fire weather concerns, especially for the north bay
hills overnight through Tuesday. Temperatures are forecast to
cool late in the week with the potential for unsettled weather
conditions during the upcoming weekend.

Discussion As of 9:23 pm pdt Sunday... No updates planned for
this evening. Skies are mostly clear with developing offshore wind
pattern. Northerly gradients down the coast are about 4 mb with
the large scale wmc-sfo having just turned offshore by about 2 mb.

Light northeast winds are already showing themselves in the hills
of the north bay, a sure sign of our upcoming critical fire
weather and warming trend. Main impact in short is fire weather so
will focus there. At first glance the 3% rh at mt tam may appear
suspect but mallory ridge in the east bay just dipped to 5% with
11% at las trampas and 4% at ben lomond in the santa cruz mtns.

This is all consistent with an established 1000 foot marine layer
along the coast and developing dry north wind pattern. Rh values
this dry at night above the marine layer combined with any wind
will be of concern. The northeast winds will continue to slowly
develop overnight, first showing in the highest ridges of napa
county. The winds wont be strong enough to break through any of
the night time inversion layers setting up around 1000 feet. So
all the winds and low humidity will stay confined to the hills.

This pattern then sets the stage for a sunny and warm Monday
across the bay area. We should expect widespread 80s inland and
even comfy 70s near the coast. The offshore winds never get strong
so we wont drive hot temps all the way to the beaches.

The models continue to show more drying and stronger winds Monday
night into Tuesday across the north bay hills. Will avoid any
yo-yo forecasting for the time being but will have to closely
monitor for fire weather watch or red flag warnings over the next
few forecast cycles. Latest NAM solution keeps winds light later
Tuesday into weds but drives a very dry airmass across nearly all
the area through midweek with above normal temps. It will be a
warm week with elevated fire weather concerns.

Long range shows cooling by the weekend. Will await the new 00z
euro before elaborating more on the extended range precip chances.

Aviation As of 10:25 pm pdt Sunday... For 06z tafs. Satellite
imagery showing mainly clear skies across the region with some
patches of stratus beginning to form around the monterey bay.

Patchy ifr CIGS expected for the monterey TAF sites and possibly
around koak late tonight. Patchy dense fog still possible in the
early morning in the north bay and around the monterey bay areas.

Light winds overnight increasing and becoming onshore in the
afternoon.

Low confidence on timing and extent of stratus redevelopment.

Vicinity of ksfo...VFR. Some patches of stratus may develop around
the bay and along the san mateo coast. This could cause some sct
cigs for ksfo early in the morning, but confidence is low.

Sfo bridge approach... Similar to ksfo.

Monterey bay terminals...VFR through late tonight. Seeing some
patches of stratus starting to develop over the bay. Uncertain as
to when this may begin to affect the terminals. May also see some
patchy dense fog early in the morning.

Marine As of 09:08 pm pdt Sunday... Moderate to locally gusty
northwest winds will continue in the overnight hours across the
coastal waters. This will result in locally generated steep fresh
swell. Winds will diminish into tomorrow morning with locally
gusty northwest winds continuing north of point reyes through
midday. Once winds subside, they will remain generally light
through the period.

Mtr watches warnings advisories
Tngt Sca... Pt arena to pigeon pt 10-60 nm
sca... Pt arena to pt reyes 0-10 nm until 3 am
sca... Pt pinos to pt piedras blancas 0-10 nm until 3 am
sca... Pigeon pt to pt piedras blancas 10-60 nm
public forecast: rww
aviation: as
marine: as
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Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
AAMC1 - 9414750 - Alameda, CA 9 mi41 min 57°F 66°F1011.4 hPa
PXOC1 - 9414311 - San Francisco (Pier 1), CA 10 mi41 min 56°F 1010.1 hPa
OKXC1 - 9414776 - Oakland (Berth 34), CA 11 mi41 min 57°F 1011.2 hPa
OBXC1 11 mi41 min 57°F 54°F
PXSC1 11 mi41 min 57°F 53°F
OMHC1 - 9414769 - Oakland Middle Harbor Met, CA 11 mi53 min SSW 2.9 G 5.1
LNDC1 11 mi41 min 57°F 1011.1 hPa
FTPC1 - 9414290 - San Francisco, CA 12 mi41 min 55°F 60°F1011.5 hPa
RTYC1 - 9414523 - Redwood City, CA 13 mi41 min 59°F 70°F1011.7 hPa
46237 - San Francisco Bar, CA (142) 17 mi41 min 58°F5 ft
TIBC1 - Tiburon Pier, San Francisco Bay, CA 17 mi36 min Calm 54°F 1011 hPa
PPXC1 - 9414847 - Richmond (Point Potrero), CA 18 mi41 min 58°F 1011.2 hPa
RCMC1 - 9414863 - Richmond, CA 19 mi41 min 57°F 63°F1010.8 hPa
46026 - SAN FRANCISCO - 18NM West of San Francisco, CA 26 mi31 min WNW 5.8 G 9.7 55°F 1011.5 hPa
DPXC1 - 9415141 - Davis Point, San Pablo Bay, CA 29 mi41 min 58°F 1010.4 hPa
MZXC1 - 9415102 - Martinez-Amorco CA 29 mi41 min 59°F 67°F1010.5 hPa57°F
PCOC1 - 9415144 - Port Chicago, CA 33 mi41 min 58°F 67°F1010.2 hPa
PSBC1 - 9415115 - Pittsburg (Suisun Bay), CA 37 mi41 min 67°F 1009.4 hPa
PRYC1 - 9415020 - Point Reyes, CA 41 mi41 min 59°F1010.8 hPa
SFXC1 - San Francisco Bay Reserve, CA 42 mi86 min W 8 60°F 1009 hPa49°F

Wind History for Alameda, CA
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
San Francisco, San Francisco International Airport, CA2 mi75 minWNW 810.00 miFair56°F48°F77%1010.8 hPa
Oakland, Metro Oakland International Airport, CA8 mi18 minNNW 410.00 miFair54°F51°F90%1011.4 hPa
San Carlos Airport, CA10 mi16 minN 010.00 miFair57°F50°F77%1011.2 hPa
Half Moon Bay Airport, CA12 mi16 minNNE 37.00 miFair45°F42°F93%1011.8 hPa
Hayward, Hayward Air Terminal, CA13 mi17 minN 010.00 miFair58°F50°F75%1011.8 hPa
Palo Alto Airport, CA17 mi3.4 hrsNW 710.00 miClear0°F0°F%1011.5 hPa
Mountain View, Moffett Field, CA22 mi75 minN 010.00 miFair59°F54°F83%1011.7 hPa

Wind History from SFO (wind in knots)
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Last 24hrW7NW8NW7W5W4W4W8W6W6NW8NW8NW11NW14NW14NW16NW14W13NW15W15NW11NW11W10W10NW8
1 day agoW7W11W10W11W8W6S3CalmCalm3NW4NW6NW9NW14NW11W17NW18NW16W17NW14NW15NW10W11W6
2 days agoSE3E3W3W4W4CalmW5W3----NE4N4N8N8NW11NW15NW14NW16NW18NW16W14W16W10W5

Tide / Current Tables for Oyster Point Marina, San Francisco Bay, California
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Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.


Tide / Current Tables for Oyster Point 2.8 mi E, South San Francisco Bay, California Current
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Tide / Current data from XTide NOT FOR NAVIGATION
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Weather Map and Satellite Images
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wmap_P
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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Other links: Northern Pacific     Contential US     Full GOES-East
Wind Forecast for San Francisco/Monterey Bay Area, CA (3,6,7,8)
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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.