Saturday, October21, 2017 L-36.com


Marine Weather and Tides
Tomales, 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 7:25AMSunset 6:24PM Saturday October 21, 2017 8:44 AM PDT (15:44 UTC) Moonrise 8:08AMMoonset 6:59PM 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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PZZ540 Point Arena To Point Reyes To 10 Nm- 304 Am Pdt Sat Oct 21 2017
Today..NE winds 5 kt...becoming sw in the afternoon. Wind waves 2 ft or less...becoming 3 ft in the afternoon. NW swell 9 to 12 ft at 14 seconds.
Tonight..NW winds 5 kt. Wind waves 2 ft or less. NW swell 8 to 10 ft at 13 seconds.
Sun..NW winds 5 to 15 kt. Wind waves 1 to 3 ft. NW swell 8 to 9 ft at 13 seconds.
Sun night..NW winds 10 to 20 kt. Wind waves 2 to 4 ft. NW swell 8 to 9 ft at 13 seconds. ..Shifting to the W 4 to 5 ft.
Mon..N winds 10 kt. Wind waves 2 ft or less. NW swell 7 to 8 ft at 12 seconds.
Tue..NW winds 5 to 15 kt. Wind waves 1 to 3 ft. NW swell 7 to 9 ft.
Wed..NW winds 15 to 25 kt. Wind waves 3 to 5 ft. W swell 4 to 6 ft.
PZZ500 304 Am Pdt Sat Oct 21 2017
Synopsis for the central california coast and bays including the Monterey bay..Greater farallones...and cordell bank national marine sanctuaries... High pressure off the central california coast will weaken tonight and Sunday as a frontal system moves into the pacific northwest. The high will strengthen and build northward Sunday night and Monday after the front passes. A long period northwest swell will continue to taper down through the day.

7 Day Forecast for Marine Location Near Tomales, CA
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location: 38.19, -122.92     debug


Area Discussion for - San Francisco/Monterey Bay Area, CA
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Fxus66 kmtr 211515
afdmtr
area forecast discussion
national weather service san francisco bay area
815 am pdt Sat oct 21 2017

Synopsis A warming trend will begin over the weekend and
continue into early next week. Much warmer and drier conditions
are expected to develop by Monday and Tuesday. Slight cooling is
likely during the second half of the week, but temperatures will
remain well above seasonal averages.

Discussion As of 08:05 am pdt Saturday... A cool start to the
morning with widespread temperatures being reported in the 40s
with a few middle upper 30s in parts of the north bay valleys.

Otherwise, mainly clear skies prevail region-wide with a few to
scattered high clouds streaming inland over the region. The
forecast remains on track for a slight warming trend this
afternoon before a more robust warm-up gets underway Sunday
through Tuesday as high pressure builds over the region. Please
see the previous forecast discussion below for additional details
as no major forecast updates are needed at this time.

Prev discussion As of 3:30 am pdt Saturday... Quiet night
across our region today with cool temperatures (mostly in the 40s
to the lower 50s) that are running 5 to 10 degrees cooler than
this time yesterday. Drier air is also in place with dew points in
the 40s. Only real question is if fog will form before sunrise.

Best bet is in the north bay -- santa rosa is currently at 100% rh
-- so will leave it in the forecast for that region. Today should
be generally sunny with slightly warmer temperatures as a ridge
of high pressure off the coast builds toward our region. Highs
will be in the mid 60s to the lower 70s.

Temperatures will continue to trend warmer into next week as the
ridge expands and builds into the southwestern conus. This has
been a change in the synoptic pattern that has been advertised for
over a week by the models. Latest guidance has 500 mb heights at
or above 595 dm for Monday and Tuesday. At the same time 925 mb
temperatures will be in the 25-30c range which would put it close
to some of the highest values ever for the entire month of
october. With winds forecast to be offshore, very warm
temperatures will make its way across our entire region --
including local beaches. Highs will be in the 80s to mid 90s.

Records will likely fall. Overnight lows will remain cool
providing relief from the daytime heat.

After that we see a large divergence with solutions. The GFS has a
system dropping into the great plains with the ridge rex block
focused more to the northwest of our area. On the other hand the
ecmwf shows that on Wednesday the ridge will flatten while a
system dives southward from british columbia into the interior
northwest. This system will continue into eastern nevada four
corners region late on Thursday. If this solution verifies it will
lead to gusty northerly winds particularly for the north bay
mountains and east bay hills. ECMWF already has 925 mb speeds
forecast to exceed 30 kt. Although this is still a few days out,
we will be keeping a very close eye on it to see where the system
will end up. If the GFS is correct it will be a non-event.

No indication of rain through halloween.

Aviation As of 4:30 am pdt Saturday... Satellite image is
partially obscured by high clouds but indications are stratus is
nil or patchy at the coast.VFR conditions today but there could
see some vsbys down to 3-5 miles through 16z in the north bay as
the ground may still be saturated from the recent rain.

Vicinity of ksfo...VFR. West winds 13-15 kt after 21z.

Sfo bridge approach... Similar to ksfo.

Monterey bay terminals...VFR.

Fire weather As of 5:30 am pdt Saturday... Gradual warming
trend starts today with light northerly winds. This trend
continues into tomorrow with winds turning more to the northeast
with continued warming and drying. Another round of gusty offshore
winds is forecast for the napa hills Sunday night into Monday
morning. Recent rain has helped but will need to watch the Sunday
night into Monday morning wind event closely. Long range trends
suggest warm to hot afternoons and very dry conditions with
periods of offshore winds for much of next week.

There is also concern about a potential northerly wind event for
the north and east bay hills late Thursday into Friday.

Marine As of 3:30 am pdt Saturday... High pressure off the
central california coast will weaken tonight and Sunday as a
frontal system moves into the pacific northwest. The high will
strengthen and build northward Sunday night and Monday after the
front passes. A long period northwest swell will continue to taper
down through the day.

Mtr watches warnings advisories
Tday Sca... Rough bar advisory for sf bar until 3 pm
sca... Pt pinos to pt piedras blancas 0-10 nm
public forecast: rgass
aviation: W pi
marine: W pi
fire weather: bell
visit us at

Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
PRYC1 - 9415020 - Point Reyes, CA 14 mi44 min W 5.1 G 7 54°F1023.4 hPa (+1.0)
46013 - Bodega Bay - 48NM North Northwest of San Francisco, CA 21 mi34 min N 3.9 G 5.8 53°F 53°F1024.2 hPa50°F
46026 - SAN FRANCISCO - 18NM West of San Francisco, CA 30 mi54 min NNW 7.8 G 9.7 55°F 55°F10 ft1023.8 hPa (+1.4)
TIBC1 - Tiburon Pier, San Francisco Bay, CA 32 mi77 min Calm 52°F 1024 hPa
46237 - San Francisco Bar, CA (142) 32 mi44 min 56°F9 ft
RCMC1 - 9414863 - Richmond, CA 33 mi44 min NNW 6 G 7 53°F 58°F1023.9 hPa (+1.4)
46214 - Point Reyes, CA (029) 34 mi44 min 53°F13 ft
PPXC1 - 9414847 - Richmond (Point Potrero), CA 35 mi44 min N 5.1 G 8 55°F 1024.2 hPa (+1.4)
DPXC1 - 9415141 - Davis Point, San Pablo Bay, CA 36 mi44 min S 1.9 G 2.9 51°F 1023.7 hPa (+1.4)
FTPC1 - 9414290 - San Francisco, CA 36 mi44 min SSW 1.9 G 2.9 52°F 56°F1024.3 hPa (+1.4)
PXOC1 - 9414311 - San Francisco (Pier 1), CA 39 mi44 min Calm G 1 55°F 1022.9 hPa (+1.4)
PXSC1 39 mi44 min 56°F 47°F
OBXC1 41 mi44 min 54°F 46°F
OKXC1 - 9414776 - Oakland (Berth 34), CA 41 mi44 min NNE 7 G 8 54°F 1024 hPa (+1.4)
OMHC1 - 9414769 - Oakland Middle Harbor Met, CA 41 mi44 min NNE 6 G 8
LNDC1 43 mi44 min NNE 1.9 G 2.9 54°F 1023.9 hPa (+1.4)
MZXC1 - 9415102 - Martinez-Amorco CA 43 mi44 min NW 4.1 G 5.1 51°F 61°F1024.3 hPa (+1.6)47°F
AAMC1 - 9414750 - Alameda, CA 44 mi44 min N 1.9 G 5.1 54°F 61°F1024.5 hPa (+1.4)
SFXC1 - San Francisco Bay Reserve, CA 47 mi59 min Calm 42°F 1023 hPa41°F
PCOC1 - 9415144 - Port Chicago, CA 48 mi44 min SSW 6 G 8 48°F 61°F1024 hPa (+1.7)

Wind History for Point Reyes, CA
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Petaluma Municipal Airport, CA17 mi49 minW 310.00 miFair43°F42°F100%1024 hPa
Novato / Gnoss Field, CA20 mi69 minN 010.00 miFair41°F39°F93%1024.4 hPa
Santa Rosa, Santa Rosa Sonoma County Airport, CA23 mi51 minN 010.00 miPatches Fog40°F39°F100%1023.3 hPa

Wind History from O69 (wind in knots)
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Last 24hrCalm5Calm5NW7
G13
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W12--W125W7----W5W5W5CalmW7CalmCalmNW3NW3CalmCalm
1 day ago544W8W95SW6
G11
SW8SW4S7S4SW4S5SW9W10
G18
W9W9W10NW5CalmCalmW3CalmCalm
2 days agoN3W5NW4W3CalmNW5W10
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W4W5
G12
W95W4W4W3CalmCalm

Tide / Current Tables for Blakes Landing, Tomales Bay, California
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Blakes Landing
Click for Map
Sat -- 02:01 AM PDT     4.30 feet High Tide
Sat -- 07:26 AM PDT     Sunrise
Sat -- 07:56 AM PDT     1.51 feet Low Tide
Sat -- 09:07 AM PDT     Moonrise
Sat -- 01:30 PM PDT     4.98 feet High Tide
Sat -- 06:25 PM PDT     Sunset
Sat -- 07:59 PM PDT     Moonset
Sat -- 08:35 PM PDT     0.04 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
3.244.34.13.62.92.21.71.51.82.63.54.34.94.94.53.72.61.50.60.10.10.61.5

Tide / Current Tables for Point Reyes, California Current
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Point Reyes
Click for Map
Sat -- 02:03 AM PDT     -0.00 knots Slack
Sat -- 04:29 AM PDT     -0.89 knots Max Ebb
Sat -- 07:27 AM PDT     Sunrise
Sat -- 08:00 AM PDT     0.00 knots Slack
Sat -- 09:07 AM PDT     Moonrise
Sat -- 10:44 AM PDT     0.85 knots Max Flood
Sat -- 01:38 PM PDT     -0.00 knots Slack
Sat -- 04:40 PM PDT     -1.30 knots Max Ebb
Sat -- 06:25 PM PDT     Sunset
Sat -- 08:00 PM PDT     Moonset
Sat -- 08:33 PM PDT     0.00 knots Slack
Sat -- 11:31 PM PDT     1.04 knots Max Flood
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
0.90.60-0.5-0.9-0.9-0.7-0.4-00.50.80.80.70.3-0.2-0.8-1.2-1.3-1.1-0.7-0.30.20.71

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 (11,2,3,4)
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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.