Thursday, April27, 2017 L-36.com


Marine Weather and Tides
Cambrian Park, CA

Version 3.4
What's New / NOTES
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.
3/12/2015 - Added section for Gulf current for users in the GMZ marine zones.
This was requested by a user. If you have requests, please let me know.

Sunrise 6:14AMSunset 7:55PM Thursday April 27, 2017 11:43 AM PDT (18:43 UTC) Moonrise 6:30AMMoonset 8:33PM Illumination 3% 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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PZZ535 Monterey Bay- 839 Am Pdt Thu Apr 27 2017
.small craft advisory in effect through late tonight...
Today..NW winds 5 to 15 kt...becoming west 15 to 25 kt in the afternoon. Wind waves 3 to 5 ft. W swell 6 to 8 ft at 12 seconds.
Tonight..NW winds 15 to 25 kt. Wind waves 3 to 5 ft. W swell 6 to 8 ft at 12 seconds.
Fri..NW winds 10 kt...increasing to 15 to 25 kt in the afternoon. Wind waves less than 2 ft...becoming 3 ft in the afternoon. W swell 3 to 5 ft at 11 seconds.
Fri night..NW winds 15 to 25 kt. Wind waves 3 to 5 ft. W swell 5 to 7 ft at 11 seconds.
Sat..W winds 5 to 15 kt. Wind waves 1 to 3 ft. W swell 5 to 7 ft.
Sun..NW winds 5 to 15 kt. Wind waves 1 to 3 ft. W swell 5 to 7 ft.
Mon..NW winds 5 to 15 kt. Wind waves 1 to 3 ft. W swell 6 to 8 ft.
PZZ500 839 Am Pdt Thu Apr 27 2017
Synopsis for the central california coast and bays including Monterey bay national marine sanctuaries.. Increasing northwesterly winds will impact the coastal waters today and Friday as building high pressure tightens the pressure gradient. Some isolated gale force gusts will be possible offshore and near coastal points. Steep seas will develop in response to the winds and a fresh northwest swell will continue to impact the coastal waters through the weekend.

7 Day Forecast for Marine Location Near Cambrian Park, CA
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location: 37.22, -121.88     debug


Area Discussion for - San Francisco/Monterey Bay Area, CA
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Fxus66 kmtr 271750
afdmtr
area forecast discussion
national weather service san francisco bay area
issued by national weather service los angeles/oxnard ca
1050 am pdt Thu apr 27 2017

New aviation discussion...

Synopsis A mostly sunny but breezy but still seasonably cool
day is expected today. Continued breezy at times Friday, near the
coast and in the hills with a gradual warming trend. Winds will
ease by Saturday morning then clear and warm weather is forecast
over the weekend and into early next with no rain in the extended
forecast.

Discussion As of 9:00 am pdt Thursday... The previous discussion
below remains on track as an upper level ridge begins to build
over the western pacific leaving central california in northwest
flow aloft. Low level stratus and fog is gradually mixing out this
morning and should dissipate completely in the next hour or so.

Surface high pressure will strengthen under the building ridge
allowing for northerly winds to increase through the day today.

Wouldn't be surprised to see some gusts to 35 mph on the north and
east bay hills Friday morning as an offshore tight pressure
gradient develops. See the previous discussion below for more
details.

Prev discussion As of 3:39 am pdt Thursday... Still getting a
few tips of the rain bucket in the santa cruz mountains and hills
of monterey county with northwest post frontal onshore flow in
place. Low cloud product shows the north bay is nearly clear of
clouds now which is supported by a 5 mb arcata to sfo gradient,
which is the usual rule of thumb for scouring clouds out of the
north bay. Areas of clouds south of the golden gate should clear
by late morning with any morning coastal drizzle ending around 15z
or so.

Synoptic pattern today features cyclonic flow aloft with strong
onshore surface pressure gradients that will kick up strong
afternoon northwest winds along the coast and coastal hills,
keeping a chill in the air this afternoon.

Overnight as the main longwave trough digs over the great basin
the response along the california coast will be a developing
thermal trough at the surface which will push the winds to a more
north or northeast direction by Friday morning. This will bring
some 35 mph winds to the north and east bay hills Friday morning
and allow for some favorable downslope winds. So under clear
skies expect temperatures to warm well into the 70s to wind out
the work week.

Winds will ease for a time Friday afternoon, except right at the
beaches where north winds will continue. Then again Friday night
into Saturday another round of offshore winds will develop in the
hills. This time with a drier and warmer airmass in place. This
will set the stage for a magnificent Saturday morning to start out
the bay area weekend. If you get out early enough you'll almost
be able to smell the warmth as the offshore winds usher in a drier
airmass with no marine layer to speak of. Saturday should be the
warmest day so far this year for many locations with highs
climbing into the 80s for may of the inland valleys, especially in
the north and east bay where favorable downslope wind flow will
continue.

By Sunday the offshore winds will have eased but the stage will be
set for several days of ideal spring time weather with clear skies
and daytime highs generally in the 70s and 80s for much of the bay
area and likely even some near 90 degree readings for southern
monterey county.

The earliest it looks like the ridge will break down would be
around next Thursday. Will see if we get any stratus intrusions
before that but it looks like a real nice period of warm and dry
weather coming up for the region.

Aviation As of 10:45 am pdt Thursday... For 18z tafs. Currently
vfr across all sites. Increasing NW winds are expected by this
afternoon with gusts approaching 30 kt possible at sfo by 22z.

Vicinity of ksfo... Expecting conditions to remainVFR through the
period. W-nw winds are expected to increase by this afternoon with
gusts up to 30 kt possible. Winds should begin to decrease late
tonight.

Sfo bridge approach... Similar to ksfo.

Monterey bay terminals... CurrentlyVFR at mry and sns.VFR
conditions are expected to prevail through the period.

Marine As of 09:00 am pdt Thursday... The forecast remains on
track this morning with high pressure taking over the weather
pattern. The pressure gradient will tighten across the waters in
response to building high pressure causing northerly winds to
increase over the next couple of days. Wind gusts as high as 25 to
30 kt will become more frequent today and Friday. Some isolated
gale force gusts will even be possible offshore and near coastal
points. Then fresh north winds will persist into the weekend. Seas
will become quite steep due to the winds and a mid period
westerly swell will continue to impact the waters through the
weekend. The existing small craft advisories will remain in
effect.

Mtr watches/warnings/advisories
Ca... None.

Pz... Small craft advisory until 9 pm pdt Friday for pzz540-545-560-
565-570-575.

Small craft advisory until 3 am pdt Friday for pzz535.

Short term... 99
long term... .99


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
RTYC1 - 9414523 - Redwood City, CA 27 mi44 min NNW 5.1 G 8.9 59°F 64°F1017.7 hPa (+0.6)
46092 - MBM1 33 mi97 min WNW 14 53°F 1017.2 hPa (+1.1)
46240 - Cabrillo Point, Monterey Bay, CA (158) 41 mi113 min 58°F4 ft
46042 - MONTEREY - 27NM West of Monterey Bay, CA 42 mi54 min 27 G 33 55°F 56°F10 ft1018.2 hPa (+0.7)
MEYC1 42 mi68 min WNW 11 G 14 54°F 59°F1018.3 hPa
46114 - West Monterey Bay, CA 42 mi134 min 55°F11 ft
AAMC1 - 9414750 - Alameda, CA 44 mi44 min W 4.1 G 7 60°F 61°F1018.6 hPa (+0.7)
LNDC1 45 mi56 min NW 5.1 G 8 59°F 1018.1 hPa
OMHC1 - 9414769 - Oakland Middle Harbor Met, CA 47 mi44 min NW 1.9 G 6
OKXC1 - 9414776 - Oakland (Berth 34), CA 47 mi44 min WNW 1.9 G 4.1 58°F 1018.3 hPa (+0.6)
OBXC1 47 mi44 min 58°F 48°F
PXOC1 - 9414311 - San Francisco (Pier 1), CA 48 mi56 min W 2.9 G 6 60°F 1017.1 hPa
PXSC1 49 mi44 min 61°F 49°F

Wind History for Redwood City, CA
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
San Jose / Reid / Hillv, CA9 mi1.9 hrsW 610.00 miMostly Cloudy61°F50°F68%1018.3 hPa
San Jose, San Jose International Airport, CA11 mi51 minNW 1010.00 miMostly Cloudy63°F50°F63%1018.1 hPa
Mountain View, Moffett Field, CA17 mi48 minN 910.00 miFair63°F51°F65%1018.7 hPa
Watsonville, Watsonville Municipal Airport, CA20 mi51 minW 36.00 miFair with Haze61°F54°F78%1017.8 hPa
Palo Alto Airport, CA22 mi57 minNNW 1010.00 miMostly Cloudy63°F51°F68%1018.3 hPa

Wind History from RHV (wind in knots)
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Last 24hrCalm--Calm------NW12--NW10NW7NW7NW7----------------Calm----W6
1 day agoW6NW8NW9----W9----NW10----NW5----------------Calm--Calm--
2 days agoN5NW6--NW5NW5NW10NW10NW10NW10NW10NW10NW10----------------CalmCalmNW6NW5

Tide / Current Tables for Gold Street Bridge, Alviso Slough, San Francisco Bay, California
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Gold Street Bridge
Click for Map
Thu -- 01:28 AM PDT     10.55 feet High Tide
Thu -- 06:17 AM PDT     Sunrise
Thu -- 07:30 AM PDT     Moonrise
Thu -- 09:07 AM PDT     -1.04 feet Low Tide
Thu -- 02:45 PM PDT     8.53 feet High Tide
Thu -- 07:54 PM PDT     Sunset
Thu -- 09:07 PM PDT     1.38 feet Low Tide
Thu -- 09:34 PM PDT     Moonset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
8.610.310.49.57.85.63.11-0.5-1-0.41.546.48.18.57.96.54.83.11.91.42.14.2

Tide / Current Tables for Dumbarton Point 2.3 mi NE, South San Francisco Bay, California Current
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Dumbarton Point 2.3 mi NE
Click for Map
Thu -- 01:48 AM PDT     -0.00 knots Slack
Thu -- 06:17 AM PDT     Sunrise
Thu -- 06:26 AM PDT     -1.68 knots Max Ebb
Thu -- 07:30 AM PDT     Moonrise
Thu -- 08:54 AM PDT     0.00 knots Slack
Thu -- 11:38 AM PDT     1.82 knots Max Flood
Thu -- 03:01 PM PDT     -0.00 knots Slack
Thu -- 06:56 PM PDT     -1.09 knots Max Ebb
Thu -- 07:54 PM PDT     Sunset
Thu -- 08:57 PM PDT     0.00 knots Slack
Thu -- 09:34 PM PDT     Moonset
Thu -- 11:35 PM PDT     1.41 knots Max Flood
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
1.20.6-0.1-0.6-1.1-1.5-1.7-1.5-0.80.11.11.71.81.50.90-0.4-0.8-1-1.1-0.700.81.3

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 (14,3,4,5)
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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.