Tuesday, October24, 2017 L-36.com


Marine Weather and Tides
Pleasanton, 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 7:24AMSunset 6:18PM Tuesday October 24, 2017 4:04 AM PDT (11:04 UTC) Moonrise 10:46AMMoonset 8:58PM Illumination 18% Phase: Waxing Crescent; Moon at 4 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- 253 Am Pdt Tue Oct 24 2017
Today..NE winds 10 kt.
Tonight..W winds 5 kt.
Wed..NW winds 5 kt...becoming east in the afternoon.
Wed night..W winds 5 kt.
Thu..W winds 5 kt.
Fri..NE winds 5 kt...becoming w.
Sat..NE winds 5 kt...becoming w.
PZZ500 253 Am Pdt Tue Oct 24 2017
Synopsis for the central california coast and bays including the Monterey bay..Greater farallones...and cordell bank national marine sanctuaries... High pressure over the pacific northwest is bringing light offshore winds to the coastal waters. Another high will build off the northern california coast Wednesday resulting in increasing northwest winds over the northern outer waters. A large long period northwest swell will arrive by the weekend.

7 Day Forecast for Marine Location Near Pleasanton, CA
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location: 37.66, -121.89     debug


Area Discussion for - San Francisco/Monterey Bay Area, CA
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Fxus66 kmtr 241013
afdmtr
area forecast discussion
national weather service san francisco bay area
313 am pdt Tue oct 24 2017

Synopsis Clear and hot this afternoon with near record breaking
heat possible. Slight cooling by Wednesday but continued warm and
dry through the end of the work week and into the weekend.

Discussion As of 3:13 am pdt Tuesday... The sfo-wmc gradient is
currently around 15 mb offshore with some breezy east winds in
the hills. This has brought ideal downslope conditions to portion
of the east bay shoreline and even around half moon bay with
middle of the night temps hovering in the low 80s. Its an unusual
set up where the hill sites aren't necessarily the warmest given
no marine layer. There's wild variation in temperatures with some
of the cooler wind protected valleys currently in the 40s while
50s and 60s are most common with plenty of the 70s and even the
aforementioned 80s at 3 am! So the stage is set for a rapid warm
up once the Sun comes up with gusty easterly winds through about
17z. Record highs today range from the upper 80s to mid 90s most
areas so we may see some records fall today. Even though its late
october the afternoon heat can cause health related issues with
sensitive populations so please hydrate and seek shade as
necessary.

It does look like today will be the hottest day (record to near
record) with "cooling" Wednesday back into the mid and upper 80s
for many areas. Basically on weds the easterly flow will diminish
and we'll lose some of the adiabatic compression but the general
wind flow will remain offshore so there will be little or no
marine influence once again.

The ECMWF had trouble running last night and dont have that for
long range guidance. The GFS keeps the ridge in place over ca
through at least the end of the work week so high confidence for
continued above normal temperatures and dry weather with high
pressure overhead.

By Sunday or Monday winds may become more onshore with a modest
cooling trend back towards seasonable temperatures. The canadian,
gfs and old ECMWF continue to advertise dry weather through
halloween and into early november.

Aviation As of 10:40 pm pdt Monday...VFR through the entire
period for all tafs due to an offshore flow in place. No cigs
forecast. Winds will generally be under 12 kt. High confidence.

Vicinity of ksfo...VFR through the period with no CIGS forecast.

Winds forecast to be under 10 kt. Direction will be variable at
first then mostly 280 to 310 after 19z. High confidence.

Sfo bridge approach... Similar to ksfo.

Monterey bay terminals...VFR through the period with skc
conditions. Stronger winds near ksns with speeds over 10 kt
possible starting after 12z. Winds at kmry generally under 6kt.

High confidence.

Fire weather As of 3:13 am pdt Tuesday... Noting some gusty
offshore winds across the north and east bay hills early this
morning with northeast gusts to 43 mph last hour at the oakland
north raws. North bay raws are hovering around 80 with rh 22% and
gusts to 36 mph at hawkeye raws in NRN sonoma last hour. The
strong 15 mb gradient from the deserts will keep favorable
easterly flow in place through mid-morning before winds begin to
ease. Near record heat today will keep probability of ignition
high with low rh values and continued offshore wind flow. Today
looks like the most extreme day for fire weather parameters but
overall pattern of above normal temps, offshore winds, drying
fuels and low humidity values stays in place for much of this
week with little relief in sight.

Marine As of 3:13 am pdt Tuesday... High pressure over the
pacific northwest is bringing light offshore winds to the coastal
waters. Another high will build off the northern california coast
Wednesday resulting in increasing northwest winds over the
northern outer waters. A large long period northwest swell will
arrive by the weekend.

Mtr watches warnings advisories
Tday None.

Public forecast: rww
aviation: W pi
marine: W pi
fire weather: rww
visit us at

Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
RTYC1 - 9414523 - Redwood City, CA 20 mi47 min ESE 4.1 G 4.1 63°F 65°F1020.2 hPa
AAMC1 - 9414750 - Alameda, CA 23 mi47 min W 1.9 G 1.9 68°F 62°F1020.9 hPa
LNDC1 23 mi47 min SSE 2.9 G 5.1 69°F 1020.3 hPa
OMHC1 - 9414769 - Oakland Middle Harbor Met, CA 25 mi47 min WNW 2.9 G 5.1
PSBC1 - 9415115 - Pittsburg (Suisun Bay), CA 26 mi47 min SSE 6 G 7 61°F 1021.1 hPa
OBXC1 26 mi47 min 70°F 54°F
OKXC1 - 9414776 - Oakland (Berth 34), CA 26 mi47 min WNW 4.1 G 6 67°F 1020.3 hPa
PXOC1 - 9414311 - San Francisco (Pier 1), CA 28 mi47 min W 4.1 G 6 73°F 1019.4 hPa
PCOC1 - 9415144 - Port Chicago, CA 28 mi47 min NE 4.1 G 7 61°F 62°F1021.2 hPa
PXSC1 29 mi47 min 73°F 52°F
MZXC1 - 9415102 - Martinez-Amorco CA 29 mi47 min SW 1 G 2.9 61°F 63°F1021.6 hPa59°F
PPXC1 - 9414847 - Richmond (Point Potrero), CA 30 mi47 min NNE 11 G 17 81°F 1020.6 hPa
FTPC1 - 9414290 - San Francisco, CA 32 mi47 min NNE 11 G 12 69°F 58°F1020.6 hPa
RCMC1 - 9414863 - Richmond, CA 33 mi47 min N 1.9 G 5.1 71°F 60°F1020.4 hPa
TIBC1 - Tiburon Pier, San Francisco Bay, CA 34 mi63 min WNW 5.1 71°F 1021 hPa
DPXC1 - 9415141 - Davis Point, San Pablo Bay, CA 34 mi47 min E 12 G 15 68°F 1020.4 hPa
SFXC1 - San Francisco Bay Reserve, CA 38 mi80 min ENE 6 60°F 1021 hPa53°F
46237 - San Francisco Bar, CA (142) 40 mi65 min 55°F8 ft

Wind History for Redwood City, CA
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Livermore, Livermore Municipal Airport, CA5 mi72 minESE 310.00 miFair59°F50°F72%1020.8 hPa
Hayward, Hayward Air Terminal, CA12 mi71 minN 010.00 miFair64°F48°F58%1021.3 hPa
Mountain View, Moffett Field, CA18 mi69 minN 010.00 miFair63°F55°F76%1020.9 hPa
Oakland, Metro Oakland International Airport, CA18 mi72 minSW 310.00 miFair64°F59°F84%1020.4 hPa
San Jose, San Jose International Airport, CA20 mi72 minN 010.00 miFair63°F52°F68%1020.5 hPa
San Carlos Airport, CA21 mi70 minN 09.00 miFair63°F53°F73%1021 hPa
Concord, Buchanan Field, CA24 mi72 minN 010.00 miFair58°F53°F84%1019.8 hPa

Wind History from LVK (wind in knots)
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Last 24hrE7E12E9E13NE9E10E9E13E12E10E11E14E10E6E5NE3E3E4E4CalmCalmCalmE3Calm
1 day agoCalmCalmCalmCalmCalmCalmS33CalmCalmE4S3S4NE6NE5NE5NE7E3CalmCalmE6NE7NE4Calm
2 days agoCalmCalmNE3CalmCalmCalmCalmCalm4W8NW8W10W7W10W8W6CalmCalmNE4E4CalmCalmNE3Calm

Tide / Current Tables for Mowry Slough, San Francisco Bay, California
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Mowry Slough
Click for Map
Tue -- 05:10 AM PDT     7.03 feet High Tide
Tue -- 07:25 AM PDT     Sunrise
Tue -- 10:52 AM PDT     2.96 feet Low Tide
Tue -- 11:46 AM PDT     Moonrise
Tue -- 03:51 PM PDT     7.82 feet High Tide
Tue -- 06:18 PM PDT     Sunset
Tue -- 09:59 PM PDT     Moonset
Tue -- 11:33 PM PDT     0.36 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
0.92.33.95.46.576.8653.93.233.54.76.27.47.87.56.65.23.72.21.10.4

Tide / Current Tables for Dumbarton Bridge, San Francisco Bay, California Current
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Dumbarton Bridge
Click for Map
Tue -- 02:07 AM PDT     1.53 knots Max Flood
Tue -- 06:17 AM PDT     -0.00 knots Slack
Tue -- 07:25 AM PDT     Sunrise
Tue -- 08:03 AM PDT     -0.54 knots Max Ebb
Tue -- 10:35 AM PDT     0.00 knots Slack
Tue -- 11:46 AM PDT     Moonrise
Tue -- 01:56 PM PDT     1.09 knots Max Flood
Tue -- 05:14 PM PDT     -0.00 knots Slack
Tue -- 06:18 PM PDT     Sunset
Tue -- 08:11 PM PDT     -1.23 knots Max Ebb
Tue -- 09:59 PM PDT     Moonset
Tue -- 11:37 PM PDT     0.00 knots Slack
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
0.71.31.51.41.10.70.2-0.3-0.5-0.4-0.20.10.50.91.10.90.60.1-0.4-1-1.2-1.1-0.8-0.3

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 (7,2,3,4)
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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.