Sunday, November19, 2017 L-36.com


Marine Weather and Tides
Larkspur, 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 6:55AMSunset 4:56PM Sunday November 19, 2017 7:53 PM PST (03:53 UTC) Moonrise 7:50AMMoonset 6:12PM Illumination 2% Phase: Waxing Crescent; Moon at 1 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- 248 Pm Pst Sun Nov 19 2017
Tonight..SE winds 5 kt.
Mon..SE winds 10 kt. Chance of rain in the morning, then slight chance of rain in the afternoon.
Mon night..NE winds 5 to 15 kt.
Tue..NE winds 5 to 15 kt.
Tue night..NE winds 5 to 15 kt.
Wed..NE winds 10 to 20 kt...becoming east 5 kt.
Thanksgiving day..NW winds 5 kt.
Fri..N winds 5 kt. Slight chance of rain.
PZZ500 248 Pm Pst Sun Nov 19 2017
Synopsis for the central california coast and bays including the Monterey bay..Greater farallones...and cordell bank national marine sanctuaries... A storm system currently off the british colombia coast has resulted in a split windflow pattern over the coastal waters, where winds are out of the south for the northern waters and out of north for the southern waters. Winds will eventually turn more southerly or become calm over the southern coastal waters by Monday morning. The associated cold front will stall off the northern california coast, which will keep winds southerly through at least mid week, especially for the northern waters. These southerly winds may become moderate to locally gusty over the northern outer waters. Seas are expected to remain light to moderate through the first part of next week.

7 Day Forecast for Marine Location Near Larkspur, CA
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location: 37.94, -122.53     debug


Area Discussion for - San Francisco/Monterey Bay Area, CA
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Fxus66 kmtr 200234
afdmtr
area forecast discussion
national weather service san francisco bay area
634 pm pst Sun nov 19 2017

Synopsis Dry weather will continue through the end of the
weekend, with mild days and cool nights. The next weather system
will bring rain chances late tonight and Monday, mainly across
the north bay. There is a slight chance of additional rainfall at
times in the north bay for much of this week, but most of our
area is forecast to be warm and dry through thanksgiving.

Discussion As of 01:51 pm pst Sunday... After active weather
earlier this week the weekend will end quietly. Filtered sunshine
blanket the bay area this afternoon with mild temperatures.

Latest surface analysis shows a large area of high pressure over
the region and just off the west coast. Much farther to the NW a
surface low is located near 31.30n 149.90w with a front extending
to the NE and to the sw. Just south of the SW extending frontal
boundary is a very impressive moisture plume with pwats around two
inches. Over the next 24 hours or so a battle between the ridge
and frontal boundary will unfold. As of now, the models have the
ridge of high pressure winning out. That being said, enough
moisture and warm air advection will move over the north bay to
warrant a few showers in the forecast late tonight and Monday.

Rainfall amounts will generally be light with a tenth to a
quarter possible over the north bay. There could be a few spots
near the sonoma mendocino line that could be over one quarter of
an inch. Did cut back on rain chances south of the of the golden
gate, but there could be a stray shower early tonight before the
ridge builds in tomorrow. South of sf bay is expected to remain
dry.

Monday night into Tuesday ridging builds across the bay area
bringing dry conditions but more notably well above normal
temperatures Tuesday and Wednesday. Current forecast will have
monterey san benito counties MAX temps eclipsing 80 degrees across
the interior and 70s at the coast. Elsewhere across the CWA highs
will be in the upper 60s and 70s. That will put MAX temps 10-15
degrees above normal for late november.

Ridge of high pressure weakens on thanksgiving with a slight drop
in temperatures. The weakening ridge will also allow for moisture
from the north to sag southward. Medium range models have varying
solutions on thanksgiving with the canadian showing precip to the
golden gate, GFS is north of golden gate and ECMWF is north of
santa rosa. In all, rainfall amounts are light as well-tenth to a
quarter. Given the uncertainty, will at least keep a slight
chance for showers over the north bay. The rest of the bay area
will likely have a dry and mild thanksgiving, especially south of
san jose.

The longer range models indicate the ridge will shift far enough
to the east late in the week to allow precipitation to gradually
spread into our forecast area between Thursday night and next
weekend. However, there are considerable model differences
regarding timing and location of rainfall late in the extended
forecast period.

Aviation As of 6:31 pm pst Sunday...VFR persists at the terminals
this evening though initially high cloud bases from today will
steadily lower tonight and Monday. A very moist, milder, and stable
sw flow from the sub-tropics primarily displacing to the pacific
northwest and northernmost california this week will brush the north
bay with light-moderate rain beginning tonight, while it remains
mainly dry to dry elsewhere.

The WRF model indicates 20-30 knot SW winds at the 925 mb and 850
mb levels over the north bay counties starting early Monday morning
and lasting until early Monday afternoon. With a stable lower level
air mass in place and lighter surface winds though marginal low level
wind shear (llws) is possible at ksts Monday. Will go ahead and amend
ksts TAF shortly to add llws, just need to look it over once again
and fine tune the timing. Lower level winds are much less robust over
the remaining bay area and areas to the south Monday thus llws is not
expected to the south.

Vicinity of ksfo... Light wind,VFR. Cloud bases lowering tonight and
Monday, dry runway. Low to moderate confidence.

Sfo bridge approach... Similar to ksfo.

Monterey bay terminals... Light e-se winds developing this evening,
could be near 10 knots salinas valley Monday morning.VFR and dry.

Moderate to high confidence.

Marine As of 5:08 pm pst Sunday... A storm system currently off
the british colombia coast has resulted in a split windflow
pattern over the coastal waters, where winds are out of the south
for the northern waters and out of north for the southern waters.

Winds will eventually turn more southerly or become calm over the
southern coastal waters by Monday morning. The associated cold
front will stall off the northern california coast, which will
keep winds southerly through at least mid week, especially for the
northern waters. These southerly winds may become moderate to
locally gusty over the northern outer waters. Seas are expected to
remain light to moderate through the first part of next week.

Mtr watches warnings advisories
Tngt None.

Public forecast: mm
aviation: canepa
marine: bam
visit us at

Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
RCMC1 - 9414863 - Richmond, CA 6 mi54 min NW 1.9 G 1.9 57°F 58°F1018.8 hPa (+0.4)
PPXC1 - 9414847 - Richmond (Point Potrero), CA 9 mi66 min W 1.9 G 4.1 59°F 1018.9 hPa
FTPC1 - 9414290 - San Francisco, CA 10 mi54 min SSW 4.1 G 4.1 55°F 57°F1019.3 hPa (+0.4)
46237 - San Francisco Bar, CA (142) 12 mi54 min 57°F3 ft
PXSC1 12 mi54 min 58°F 51°F
OMHC1 - 9414769 - Oakland Middle Harbor Met, CA 14 mi54 min W 5.1 G 5.1
OKXC1 - 9414776 - Oakland (Berth 34), CA 14 mi54 min WNW 4.1 G 5.1 57°F 1019 hPa (+0.6)
OBXC1 14 mi54 min 57°F 51°F
DPXC1 - 9415141 - Davis Point, San Pablo Bay, CA 16 mi54 min ENE 4.1 G 4.1 58°F 1018.6 hPa (+0.6)
LNDC1 17 mi54 min NW 1.9 G 2.9 58°F 1018.9 hPa (+0.5)
AAMC1 - 9414750 - Alameda, CA 17 mi54 min W 1.9 G 2.9 58°F 58°F1019.4 hPa (+0.5)
46026 - SAN FRANCISCO - 18NM West of San Francisco, CA 21 mi64 min NW 1.9 G 3.9 56°F 57°F3 ft1019 hPa (+0.3)
MZXC1 - 9415102 - Martinez-Amorco CA 22 mi54 min Calm G 1.9 57°F 58°F1019.1 hPa (+0.5)49°F
PRYC1 - 9415020 - Point Reyes, CA 24 mi54 min SE 1 G 1.9 57°F1018.4 hPa (-0.0)
PCOC1 - 9415144 - Port Chicago, CA 27 mi54 min Calm G 1 57°F 59°F1018.8 hPa (+0.6)
SFXC1 - San Francisco Bay Reserve, CA 32 mi69 min NNE 1 51°F 1018 hPa44°F
RTYC1 - 9414523 - Redwood City, CA 34 mi54 min NNW 1 G 2.9 58°F 60°F1019.3 hPa (+0.7)
PSBC1 - 9415115 - Pittsburg (Suisun Bay), CA 35 mi54 min Calm G 1 57°F 1018.6 hPa (+0.4)
46012 - HALF MOON BAY - 24NM South Southwest of San Francisco, CA 44 mi64 min W 3.9 G 5.8 58°F 59°F3 ft1018.7 hPa (+0.4)
46013 - Bodega Bay - 48NM North Northwest of San Francisco, CA 46 mi44 min ESE 5.8 G 7.8 56°F 56°F1018.8 hPa51°F

Wind History for Richmond, CA
(wind in knots)    EDIT      (on/off)   Help
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Novato / Gnoss Field, CA14 mi79 minN 510.00 miPartly Cloudy52°F44°F77%1019 hPa
Petaluma Municipal Airport, CA22 mi59 minN 010.00 miFair52°F44°F77%1018.6 hPa
Oakland, Metro Oakland International Airport, CA23 mi61 minNW 510.00 miMostly Cloudy56°F50°F81%1018.8 hPa
Napa, Napa County Airport, CA23 mi60 minN 010.00 miMostly Cloudy53°F43°F69%1017.9 hPa
San Francisco, San Francisco International Airport, CA24 mi58 minWNW 610.00 miMostly Cloudy57°F46°F67%1018.9 hPa

Wind History from DVO (wind in knots)
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Last 24hrCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmSE5E5SE64CalmCalmCalmCalm
1 day agoS3CalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmN3CalmE4443CalmCalmCalmCalmCalm
2 days agoCalmNW14
G19
W12W10NW11W10W7
G12
CalmCalmCalmCalmCalmN5N6NW9CalmCalmCalmN5N5NW4Calm--SE4

Tide / Current Tables for Corte Madera Creek, San Francisco Bay, California
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Corte Madera Creek
Click for Map
Sun -- 01:05 AM PST     4.73 feet High Tide
Sun -- 06:05 AM PST     2.37 feet Low Tide
Sun -- 06:55 AM PST     Sunrise
Sun -- 07:49 AM PST     Moonrise
Sun -- 11:56 AM PST     5.89 feet High Tide
Sun -- 04:55 PM PST     Sunset
Sun -- 06:12 PM PST     Moonset
Sun -- 06:49 PM PST     -0.36 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
4.44.74.543.22.62.42.63.24.155.65.95.64.73.41.90.6-0.2-0.400.91.93

Tide / Current Tables for Point San Quentin 1.9 mi E, San Francisco Bay, California Current
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Point San Quentin 1.9 mi E
Click for Map
Sun -- 02:33 AM PST     -0.00 knots Slack
Sun -- 05:06 AM PST     -1.43 knots Max Ebb
Sun -- 06:55 AM PST     Sunrise
Sun -- 07:49 AM PST     Moonrise
Sun -- 08:25 AM PST     0.00 knots Slack
Sun -- 10:58 AM PST     1.25 knots Max Flood
Sun -- 01:44 PM PST     -0.00 knots Slack
Sun -- 04:55 PM PST     Sunset
Sun -- 05:12 PM PST     -2.68 knots Max Ebb
Sun -- 06:12 PM PST     Moonset
Sun -- 09:07 PM PST     0.01 knots Slack
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
1.71.30.5-0.4-1.2-1.4-1.3-0.9-0.30.411.31.10.6-0.3-1.3-2.2-2.7-2.5-1.9-1.2-0.10.81.5

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 (22,6,7,8)
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Ground Weather Radar Station Sacramento, 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.