Monday, November20, 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 6:52AMSunset 4:54PM Monday November 20, 2017 9:27 AM PST (17:27 UTC) Moonrise 8:40AMMoonset 6:53PM Illumination 4% Phase: Waxing Crescent; Moon at 2 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- 918 Am Pst Mon Nov 20 2017
Today..SE winds 5 kt...becoming sw in the afternoon. Slight chance of rain late in the morning.
Tonight..N winds 10 kt.
Tue..NW winds 10 kt.
Tue night..N winds 10 kt.
Wed..NW winds 10 kt.
Thanksgiving day..NW winds 5 kt.
Fri..NW winds 5 kt.
PZZ500 918 Am Pst Mon Nov 20 2017
Synopsis for the central california coast and bays including the Monterey bay..Greater farallones...and cordell bank national marine sanctuaries... High pressure to the south will keep a very moist sub-tropical flow just north of the coastal waters. Winds are expected to stay light to moderate out of the south today, with the highest wind speeds remaining over the northern coastal waters. By late week into early next week a cold front will move southeastward over the coastal waters. Seas are expected to remain light to moderate through the first part of next week.

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 201653
afdmtr
area forecast discussion
national weather service san francisco bay area
853 am pst Mon nov 20 2017

Synopsis A weather system will bring periods of light rain to
the north bay and possibly san francisco today. High pressure will
bring dry and warmer weather to the area Tuesday through Thursday.

The next chance of rain will be late this weekend.

Discussion As of 08:52 am pst Monday... Morning radar imagery
from kmux and mt vaca radars continue to indicate light shower
activity across the north bay. The showers are associated with
very moisture SW flow and weak isentropic lift along the 295 k
pressure level. Rainfall amount over the last few hours have been
a few hundredths across the north bay. Current forecast for this
afternoon have showers north of the golden gate and see no reason
to change that. Locations south of the golden gate will be dry
this afternoon. No update is needed at this time.

Rain chances diminish tonight as a decent ridge builds over the
region ushering in well above normal temperatures.

Prev discussion As of 3:15 am pst Monday...

things will dry out tonight as the warm front lifts north. An
upper level trough deepening along 145w will cause an upper level
ridge to build over southern california and nevada. This will
keep rain north of the district while bringing warmer temperatures
Tuesday through Thursday. The warmest temperatures will be
Wednesday and Thursday with highs in the 70s to lower 80s in
monterey and san benito counties. Temperatures around the sfo bay
area will warm into the upper 60s to lower 70s.

The ridge flattens on Friday and temperatures will cool off
slightly. Then the ridge moves a little to the east Saturday and
Sunday and the trough starts to move to the northeast. Medium
range models indicate a warm front will bring a chance of rain to
the north bay Saturday night and most of the rest of the district
Sunday. Then another chance of rain Sunday night and Monday as the
trough passes.

Based on recent performances by the models... Would not be surprised
if future model runs trend drier with the weekend system and track
it further north. In any case rainfall rates and amounts will be
light.

Aviation As of 3:47 am pst Monday... It'sVFR at the terminals
except CIGS are MVFR over the north bay this morning. Cloud bases
have been steadily lowering since last evening as a very moist,
milder, and stable SW flow from the sub-tropics becomes displaced
to the pacific northwest and northernmost california this week.

This plume of moisture will brush the north bay with light-moderate
rain today, while it remains mainly dry to dry elsewhere to the
south.

20-30 knot SW winds at the 925 mb and 850 mb levels over the north
bay counties will result in marginal low level wind shear (llws) at
ksts this morning til early afternoon. Lower level winds are much
less robust over the remaining bay area and areas to the south today
thus llws is not expected to the south.

Vicinity of ksfo... Light wind,VFR. Cloud bases lowering today, and
forecast is dry runways. Low to moderate confidence.

Sfo bridge approach... Similar to ksfo.

Monterey bay terminals... Light e-se winds this morning, except SE to
10 knots salinas valley.VFR and dry. Moderate to high confidence.

Marine As of 3:35 am pst Monday... The eastern edge of a very
moist sub-tropical flow will overlap the northern coastal waters
through early this week. A warm frontal boundary connected to this
moist flow will approach the coastal waters today and become nearly
stationary while another warm front to the southwest advances toward
it and the bay area. By late week into early next week a cold front
will move southeastward over the coastal waters. Seas are expected
to remain light to moderate through the first part of next week.

Mtr watches warnings advisories
Tday None.

Public forecast: mm W pi
aviation: canepa
marine: canepa
visit us at

Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
RTYC1 - 9414523 - Redwood City, CA 20 mi39 min Calm G 1.9 58°F 59°F1019.4 hPa
LNDC1 23 mi45 min SE 5.1 G 6 58°F 1018.6 hPa
AAMC1 - 9414750 - Alameda, CA 23 mi39 min SE 4.1 G 5.1 57°F 58°F1019.2 hPa
OMHC1 - 9414769 - Oakland Middle Harbor Met, CA 25 mi39 min SE 4.1 G 6
PSBC1 - 9415115 - Pittsburg (Suisun Bay), CA 26 mi45 min ESE 4.1 G 5.1 56°F 1018.7 hPa
OBXC1 26 mi39 min 58°F 50°F
OKXC1 - 9414776 - Oakland (Berth 34), CA 26 mi39 min S 2.9 G 4.1 58°F 1018.8 hPa
PCOC1 - 9415144 - Port Chicago, CA 28 mi39 min ENE 2.9 G 4.1 56°F 58°F1018.9 hPa
MZXC1 - 9415102 - Martinez-Amorco CA 29 mi39 min NE 4.1 G 5.1 56°F 58°F1019.2 hPa55°F
PXSC1 29 mi39 min 58°F 53°F
PPXC1 - 9414847 - Richmond (Point Potrero), CA 30 mi39 min Calm G 1.9 59°F 1019.1 hPa
FTPC1 - 9414290 - San Francisco, CA 32 mi45 min NE 2.9 G 2.9 57°F 57°F1019 hPa
RCMC1 - 9414863 - Richmond, CA 33 mi45 min E 1.9 G 1.9 57°F 58°F1018.6 hPa
DPXC1 - 9415141 - Davis Point, San Pablo Bay, CA 34 mi39 min E 5.1 G 7 57°F 1018.5 hPa
SFXC1 - San Francisco Bay Reserve, CA 38 mi102 min Calm 54°F 1018 hPa50°F
46237 - San Francisco Bar, CA (142) 40 mi57 min 57°F3 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 mi34 minN 010.00 miOvercast57°F48°F74%1018.7 hPa
Hayward, Hayward Air Terminal, CA12 mi33 minN 010.00 miOvercast60°F45°F58%1019.8 hPa
Palo Alto Airport, CA17 mi40 minN 010.00 miMostly Cloudy59°F51°F77%1019 hPa
Mountain View, Moffett Field, CA18 mi31 minN 010.00 miOvercast58°F50°F75%1019.4 hPa
Oakland, Metro Oakland International Airport, CA18 mi34 minSE 510.00 miOvercast58°F48°F72%1018.9 hPa
San Jose, San Jose International Airport, CA20 mi34 minSE 510.00 miOvercast61°F46°F58%1018.7 hPa
San Carlos Airport, CA21 mi35 minVar 310.00 miOvercast57°F48°F72%1019.3 hPa
San Jose / Reid / Hillv, CA22 mi37 minVar 410.00 miMostly Cloudy57°F48°F72%1018.3 hPa
Concord, Buchanan Field, CA24 mi34 minNNW 410.00 miOvercast59°F48°F69%1017.5 hPa

Wind History from LVK (wind in knots)
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Last 24hrCalmCalmCalmE7E8E5E5E4NE4NE3CalmCalmNE4CalmCalmN3CalmNE3CalmCalmCalmCalmCalmCalm
1 day agoNE4E10NE7E6NE4E7E6E7NE6CalmCalmCalmCalmCalmCalmE4E3CalmCalmCalmE4CalmCalmCalm
2 days agoSW4CalmNE6NE9N8N8NE7NE8NE4CalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmE4W4W3SE4

Tide / Current Tables for Mowry Slough, San Francisco Bay, California
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Mowry Slough
Click for Map
Mon -- 02:24 AM PST     7.26 feet High Tide
Mon -- 06:53 AM PST     Sunrise
Mon -- 07:58 AM PST     2.76 feet Low Tide
Mon -- 08:40 AM PST     Moonrise
Mon -- 01:02 PM PST     8.34 feet High Tide
Mon -- 04:54 PM PST     Sunset
Mon -- 06:54 PM PST     Moonset
Mon -- 08:41 PM PST     -0.34 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
4.96.47.27.16.45.243.12.83.34.66.37.78.38.17.15.73.92.10.6-0.2-0.30.62

Tide / Current Tables for Dumbarton Bridge, San Francisco Bay, California Current
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Dumbarton Bridge
Click for Map
Mon -- 03:23 AM PST     -0.00 knots Slack
Mon -- 05:14 AM PST     -0.61 knots Max Ebb
Mon -- 06:53 AM PST     Sunrise
Mon -- 07:51 AM PST     0.00 knots Slack
Mon -- 08:40 AM PST     Moonrise
Mon -- 11:02 AM PST     1.25 knots Max Flood
Mon -- 02:18 PM PST     -0.00 knots Slack
Mon -- 04:54 PM PST     Sunset
Mon -- 05:17 PM PST     -1.49 knots Max Ebb
Mon -- 06:54 PM PST     Moonset
Mon -- 08:48 PM PST     0.00 knots Slack
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
1.61.40.90.3-0.3-0.6-0.5-0.30.10.611.21.10.70.2-0.5-1.1-1.5-1.4-1-0.50.10.91.5

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 (12,3,4,5)
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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.