Saturday, June24, 2017 L-36.com


Marine Weather and Tides
Belmont, 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 5:47AMSunset 8:35PM Saturday June 24, 2017 6:47 AM PDT (13:47 UTC) Moonrise 5:37AMMoonset 8:16PM Illumination 0% Phase: New Moon; Moon at 0 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- 343 Am Pdt Sat Jun 24 2017
Today..NW winds 5 to 15 kt. Patchy fog in the morning.
Tonight..W winds 5 to 15 kt. Patchy fog after midnight.
Sun..W winds 10 kt...increasing to 10 to 20 kt in the afternoon. Patchy fog in the morning.
Sun night..W winds 10 to 20 kt. Patchy fog after midnight.
Mon..W winds 5 to 15 kt. Patchy fog in the morning. Patchy fog after midnight.
Tue..W winds 5 to 15 kt. Patchy fog.
Wed..SW winds 10 kt. Patchy fog.
PZZ500 343 Am Pdt Sat Jun 24 2017
Synopsis for the central california coast and bays including the Monterey bay..Greater farallones...and cordell bank national marine sanctuaries... Generally light but increasing southerly winds today. The strongest winds will be along the big sur and santa cruz coastlines. Generally light northwest seas with decreasing swell heights.

7 Day Forecast for Marine Location Near Belmont, CA
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location: 37.52, -122.28     debug


Area Discussion for - San Francisco/Monterey Bay Area, CA
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Fxus66 kmtr 241201
afdmtr
area forecast discussion
national weather service san francisco bay area
501 am pdt Sat jun 24 2017

Synopsis Typical bay area weather pattern returns for the
weekend and into next week. Expect areas of night and morning low
clouds and fog followed by sunny and seasonably warm afternoons.

Discussion As of 3:46 am pdt Saturday... The marine layer has
deepened to around 1500 feet early this morning with onshore
gradients from sfo to sac at 3.2 mb. This has set the stage for
efficient transport of cool marine air into the valleys. Out in
the delta, travis air force base the wind observation is
sustained at 26 kt with gusts to 33 kt. Latest satellite fog
product and surface observations show low clouds now inundating
the entire sf bay and 880 corridor as well as most of the sonoma
county valleys. Thus expect continued cooling trend for all inland
areas after this weeks hot conditions.

One item we are watching early this morning is some moisture and
associated convection over the waters west of san diego. The
models bring this moisture northward into the coastal range of
santa barbara and then eventually farther northward towards the
monterey county line later this morning and afternoon. Some of the
short term models are hinting at possible isolated convection
over the higher terrain of southern monterey and san benito
counties. Have tried to fine tune some of these details and left
15% pops near santa rita peak as well as portions of the los
padres national forest. Confidence is low on development but cant
completely rule out with main impacts for fire weather concerns
and mainly campers outdoor interests in these remote sections of
our cwa.

Otherwise expect continued modest cooling into Sunday as an upper
trough approaches the offshore waters and strengthens the onshore
flow as the marine layer will likely deepen to around 2000 feet.

90s should be confined to only the most interior sections of the
district while more temperate upper 60s to lower 80s will be the
norm.

Its not surprising as we enter the last week of june and the
official end of the rain year that the pattern will become benign
with zonal or weak cyclonic flow aloft. A persistent climo
forecast will probably be the best forecast tool suggesting
seasonable daytime highs lows as the marine layer extends inland
at night and retreats to the coast by late morning.

Aviation As of 05:00 am pdt Saturday... For 12z tafs.

Widespread marine stratus intrusion overnight bringing lifr to
MVFR CIGS to most TAF sites... With someVFR deeper inland.

Looking for similar clearing out times this morning versus
yesterday morning given similar stratus intrusion and depth though
gradients differ. Otherwise... Generally light winds today,
except breezy conditions along the coast by the afternoon through
the evening. Some elevated moisture moving in from the south has
the slight potential of bringing rain showers thunderstorms. Low
clouds return tonight.

Vicinity of ksfo... Ifr to MVFR through around 1630-1730z. Similar
to yesterday. Onshore winds increasing to become breezy in the
afternoon. Low clouds return tonight.

Sfo bridge approach... Similar to ksfo.

Monterey bay terminals... Ifr lifr along the monterey bay this
morning through the mid to late morning. Brief clearing through
the afternoon with an early return of clouds tonight. Light winds.

Marine As of 04:58 am pdt Saturday... Generally light but
increasing southerly winds today. The strongest winds will be
along the big sur and santa cruz coastlines. Generally light
northwest seas with decreasing swell heights.

Mtr watches warnings advisories
Tday Sca... Pt pinos to pt piedras blancas 0-10 nm from 9 am
sca... Sf bay from 12 pm
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
RTYC1 - 9414523 - Redwood City, CA 4 mi48 min NW 5.1 G 6 60°F 74°F1013.7 hPa (+0.6)
AAMC1 - 9414750 - Alameda, CA 17 mi48 min W 5.1 G 8 58°F 67°F1014.8 hPa (+0.5)
LNDC1 19 mi48 min W 2.9 G 5.1 58°F 1014.3 hPa
OBXC1 20 mi48 min 57°F 56°F
PXOC1 - 9414311 - San Francisco (Pier 1), CA 20 mi48 min WSW 6 G 8.9 56°F 1013.3 hPa (+0.5)
OKXC1 - 9414776 - Oakland (Berth 34), CA 20 mi48 min W 6 G 8.9 58°F 1014.4 hPa (+0.6)
OMHC1 - 9414769 - Oakland Middle Harbor Met, CA 20 mi48 min WSW 8 G 8.9
PXSC1 21 mi48 min 57°F 57°F
FTPC1 - 9414290 - San Francisco, CA 22 mi48 min Calm G 6 55°F 57°F1014.5 hPa (+0.4)
46237 - San Francisco Bar, CA (142) 26 mi78 min 56°F4 ft
TIBC1 - Tiburon Pier, San Francisco Bay, CA 27 mi56 min W 4.1 56°F 1014 hPa (+0.0)
PPXC1 - 9414847 - Richmond (Point Potrero), CA 27 mi48 min S 12 G 15 58°F 1014.3 hPa (+0.4)
RCMC1 - 9414863 - Richmond, CA 29 mi48 min SSW 5.1 G 7 58°F 62°F1013.9 hPa (+0.5)
46026 - SAN FRANCISCO - 18NM West of San Francisco, CA 34 mi58 min W 3.9 G 3.9 55°F 56°F4 ft1014.5 hPa (+0.4)
46012 - HALF MOON BAY - 24NM South Southwest of San Francisco, CA 34 mi58 min Calm G 1.9 56°F 56°F5 ft1014.1 hPa (+0.6)
UPBC1 37 mi48 min W 15 G 20
MZXC1 - 9415102 - Martinez-Amorco CA 37 mi48 min W 13 G 17 58°F 68°F1013.5 hPa (+0.4)58°F
DPXC1 - 9415141 - Davis Point, San Pablo Bay, CA 37 mi48 min SW 13 G 15 59°F 1013.2 hPa (-0.0)
PCOC1 - 9415144 - Port Chicago, CA 39 mi48 min SW 15 G 19 58°F 70°F1012.8 hPa (+0.4)
PSBC1 - 9415115 - Pittsburg (Suisun Bay), CA 42 mi48 min WNW 17 G 21 62°F 1011.2 hPa (+0.7)
PRYC1 - 9415020 - Point Reyes, CA 49 mi48 min W 1.9 G 4.1 57°F 60°F1014 hPa (+0.4)
SFXC1 - San Francisco Bay Reserve, CA 49 mi63 min W 14 57°F 1011 hPa55°F

Wind History for Redwood City, CA
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
San Carlos Airport, CA2 mi53 minNW 410.00 miOvercast61°F55°F83%1014.2 hPa
San Francisco, San Francisco International Airport, CA8 mi52 minWNW 610.00 miA Few Clouds58°F53°F84%1014 hPa
Hayward, Hayward Air Terminal, CA13 mi54 minNNW 410.00 miOvercast61°F53°F75%1014.9 hPa
Oakland, Metro Oakland International Airport, CA13 mi55 minW 810.00 miOvercast61°F55°F84%1014.2 hPa
Mountain View, Moffett Field, CA14 mi52 minE 310.00 miOvercast62°F59°F90%1014.6 hPa
San Jose, San Jose International Airport, CA21 mi55 minN 010.00 miOvercast63°F59°F87%1014 hPa

Wind History from SQL (wind in knots)
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Last 24hrNW33N5N10NE9N11N8N10N10NW7N8NW9N7NW6NW6N5NW4NW6NW5W4N4NW4NW4N4
1 day agoN4344NE6N7NW9N8N9N11NW11N9N9N7N7N5N5N3N5N4N4NW3N3NW3
2 days agoSE6NE7E43NE6N6N9NW8----N8N6N6NW5NW4NW3NW4N4N3NW3W3CalmNW3NE4

Tide / Current Tables for Smith Slough, San Francisco Bay, California
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Smith Slough
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Sat -- 12:47 AM PDT     9.08 feet High Tide
Sat -- 05:48 AM PDT     Sunrise
Sat -- 06:36 AM PDT     Moonrise
Sat -- 08:18 AM PDT     -1.75 feet Low Tide
Sat -- 02:48 PM PDT     7.20 feet High Tide
Sat -- 08:08 PM PDT     2.28 feet Low Tide
Sat -- 08:33 PM PDT     Sunset
Sat -- 09:15 PM PDT     Moonset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
8.79.18.57.152.60.5-1-1.7-1.5-0.21.63.65.56.87.26.65.43.92.82.32.745.8

Tide / Current Tables for San Mateo Bridge, South San Francisco Bay, California Current
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San Mateo Bridge
Click for Map
Sat -- 01:27 AM PDT     -0.00 knots Slack
Sat -- 05:09 AM PDT     -2.46 knots Max Ebb
Sat -- 05:48 AM PDT     Sunrise
Sat -- 06:36 AM PDT     Moonrise
Sat -- 08:33 AM PDT     0.00 knots Slack
Sat -- 11:27 AM PDT     2.43 knots Max Flood
Sat -- 03:09 PM PDT     -0.01 knots Slack
Sat -- 05:47 PM PDT     -1.22 knots Max Ebb
Sat -- 08:26 PM PDT     0.00 knots Slack
Sat -- 08:34 PM PDT     Sunset
Sat -- 09:16 PM PDT     Moonset
Sat -- 11:09 PM PDT     1.76 knots Max Flood
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
1.20.5-0.5-1.4-2.1-2.5-2.2-1.6-0.60.61.82.42.421.20.2-0.6-1.1-1.2-0.9-0.30.51.31.8

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 (9,2,3,4)
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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.