Monday, December22, 2014 L-36.com


Marine Weather and Tides
Dillon Beach, CA

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6/17/2014 - I reported slow load times to NOAA and they quickly resolved the problem. Sorry for any inconvience. NOAA had some stuck processes on two servers. This was a problem on 5 to 10% of the requests.
6/10/2014 - Marine Zones updated. Some zones have changed. Edit your Marine Forecast section to check.

Sunrise 7:23AMSunset 4:56PM Monday December 22, 2014 5:26 AM PST (13:26 UTC) Moonrise 7:45AMMoonset 6:09PM Illumination 1% Phase: New Moon; 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- 301 Am Pst Mon Dec 22 2014
.small craft advisory in effect from 2 pm pst this afternoon through late tonight...
Today..NW winds 10 to 20 kt. Wind waves 2 to 4 ft. W swell 9 to 10 ft at 13 seconds. Patchy fog in the morning. Patchy drizzle in the morning.
Tonight..NW winds 15 to 25 kt. Wind waves 3 to 5 ft. W swell 9 to 10 ft at 13 seconds.
Tue..NW winds 10 to 20 kt. Wind waves 2 to 4 ft. W swell 9 to 11 ft at 16 seconds.
Tue night..NW winds 10 to 20 kt. Wind waves 2 to 4 ft. W swell 9 to 11 ft at 18 seconds.
Wed..NW winds 5 to 15 kt...increasing to 15 to 25 kt. Wind waves 3 to 6 ft. W swell 8 to 10 ft at 18 seconds. Slight chance of rain in the morning...then chance of rain in the afternoon and evening. Slight chance of rain after midnight.
Christmas day..N winds 15 to 25 kt. Wind waves 3 to 5 ft... Becoming 2 ft or less. NW swell 11 to 14 ft.
Fri..E winds 10 kt. Wind waves 2 ft or less. NW swell 6 to 8 ft.
PZZ500 301 Am Pst Mon Dec 22 2014
Synopsis for the central california coast and bays including Monterey bay national marine sanctuaries.. High pressure building off the california coast will result in increasing northwest winds over the southern and outer waters this afternoon through Monday. Winds will decrease by Tuesday night as the high moves into the great basin. Winds will increase again by Thursday as another high strengthens over the eastern pacific.

7 Day Forecast for Marine Location Near Dillon Beach, CA
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location: 38.25, -122.98     debug


Area Discussion for - San Francisco/Monterey Bay Area, CA
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Fxus66 kmtr 221221
afdmtr
area forecast discussion
national weather service san francisco bay area
421 am pst Mon dec 22 2014

Synopsis Dry and mild weather for the start of the work week as
high pressure builds over the area. Higher than average tides will
result in minor coastal flooding today and tomorrow. Temperatures
warm through midweek before a storm brushes past the area bringing a
chance of rain and cooling temperatures to near seasonal normals.

Discussion As of 3:20 am pst Monday... Mild temperatures
continue this morning across the area with most of the region
still in the mid to upper 50s. Patchy fog and low clouds have
formed across much of the area overnight. Dense fog has been
limited to north bay valleys and portions of the coast thus far
however. There have been a few bucket tips of drizzle as
well... Mostly near the coast.

Minor coastal flooding will again be possible today along the
coastline and the bay shore. Perigean spring tides... Also called
king tides... Will cause inundation of low lying coastal areas.

Yesterday saw some issues including roads closed in frequent
trouble spots in the north bay and water lapping onto the
embarcadero in san francisco. This mornings high tide will be the
highest since august. See the coastal flood advisory for more
information.

A ridge will continue to build over california for the start of
the week leading to dry weather and increasing temperatures.

Tuesday will be the warmest day of the week for most areas before
a cooler airmass begins to nudge southward.

By midweek the ridge breaks down and an inside slider digs
southeast through the western states just brushing the northern
and eastern edges of the cwa. The afternoon runs of the global
models have increased the strength of the storm and have more
precip into the district however the NAM does not have the same
intensity. Naefs probability of measurable rain in the north bay
has increased significantly though for san francisco it is still
around 10 percent. For now have increased rain chances in the
north bay and far east bay as the system GOES by however
confidence remains low. Any rain that does fall will be very light
so the primary impact will be the cooler airmass. By Thursday
night temperatures in north bay valleys will likely dip into the 30s.

Ridging offshore will continue through the end of the week and
temperatures remain near normal. Global models depict another
inside slider by the weekend bringing another chance of rain.

Aviation As of 4:15 am pst Monday... Main concern this morning
is the low level moisture causing local fog around the sfo and mry
bay area. The combination of light wind and building high pressure
aloft has allowed fog to form in the east bay as well as the mry
bay area this morning. Vsbys have dropped to 1/4-1/2 mile at oak.

The 12z METAR at sfo shows vsby is 10 miles but the CIGS have
lifted and dewpt/temp spread is less than 1 degree. This will
allow for some radiational cooling which could bring fog into sfo
between 13z and 17z. Vsbys expected to improve after 17z but low
cigs in the ifr range will linger through at least 19z.

Vicinity of ksfo... Ifr CIGS with vsbys dropping as low as 1/2 to
3 miles through 17z. Vsbys improving after 17z to 3-5 miles after
17z but remaining ifr through 19z. MVFR CIGS after 19z. Possible
clearing of the CIGS late in the afternoon if the seabreeze is
strong enough.

Ksfo bridge approach... Similar to ksfo.

Monterey bay area terminals... Lifr CIGS and vsbys through 17z.

Lifr for CIGS through 19z. Ifr CIGS after 19z becoming MVFR toVFR
after 21z.

Marine As of 3:01 am pst Monday... High pressure building off
the california coast will result in increasing northwest winds
over the southern and outer waters this afternoon through Monday.

Winds will decrease by Tuesday night as the high moves into the
great basin. Winds will increase again by Thursday as another high
strengthens over the eastern pacific.

Mtr watches/warnings/advisories
Tday Coastal flood advisory... Coastal and bay shore areas
sca... Pt pinos to pt piedras blancas 0-10 nm
sca... Pigeon pt to pt pinos 10-60 nm
sca... Pt pinos to pt piedras blancas 10-60 nm
sca... Pt arena to pt reyes 0-10 nm from 2 pm
sca... Pt reyes to pigeon pt 0-10 nm from 2 pm
sca... Pigeon pt to pt pinos 0-10 nm from 2 pm
sca... Pt arena to pt reyes 10-60 nm from noon
sca... Pt reyes to pigeon pt 10-60 nm from noon
public forecast: ac
aviation/marine: W pi
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Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
46013 - Bodega Bay - 48NM North Northwest of San Francisco, CA 17 mi36 min NW 18 G 23 59°F 60°F10 ft1025.2 hPa (-0.5)
PRYC1 - 9415020 - Point Reyes, CA 18 mi38 min WNW 18 G 22 60°F 59°F1024.4 hPa
46214 - Point Reyes, CA (029) 33 mi45 min 60°F10 ft
46026 - SAN FRANCISCO - 18NM West of San Francisco, CA 35 mi96 min NNW 21 G 25 59°F 60°F9 ft1024.9 hPa (-0.4)
46237 - San Francisco Bar, CA (142) 37 mi44 min 59°F9 ft
RCMC1 - 9414863 - Richmond, CA 38 mi38 min ENE 1 G 1.9 56°F 58°F1024.5 hPa
PPXC1 - 9414847 - Richmond (Point Potrero), CA 40 mi38 min E 1 G 2.9 57°F 1025 hPa
DPXC1 - 9415141 - Davis Point, San Pablo Bay, CA 40 mi38 min SSW 4.1 G 5.1 56°F 1024.5 hPa
FTPC1 - 9414290 - San Francisco, CA 41 mi38 min Calm G 1 55°F 58°F1024.9 hPa
PXOC1 - 9414311 - San Francisco (Pier 1), CA 44 mi38 min Calm G 1.9 56°F 1023.7 hPa
PXSC1 44 mi38 min 57°F 56°F
OBXC1 46 mi38 min 56°F 56°F
OKXC1 - 9414776 - Oakland (Berth 34), CA 46 mi38 min S 1.9 G 2.9 55°F 1024.8 hPa
UPBC1 48 mi38 min WNW 6 G 8
MZXC1 - 9415102 - Martinez-Amorco CA 48 mi44 min WNW 6 G 7 56°F 55°F1023.9 hPa55°F
AAMC1 - 9414750 - Alameda, CA 49 mi38 min W 1 G 1.9 55°F 58°F1024.3 hPa
LNDC1 49 mi38 min E 1.9 G 2.9 55°F 1024.7 hPa

Wind History for Point Reyes, CA
(wind in knots)    EDIT      (on/off)   Help
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W7
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G24
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Calm
NW2
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SE11
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Calm

Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Santa Rosa, Santa Rosa Sonoma County Airport, CA20 mi33 minSW 40.75 miFog/Mist49°F48°F97%1023.6 hPa
Novato / Gnoss Field, CA24 mi31 minESE 310.00 miFair54°F53°F100%1024.7 hPa

Wind History from O69 (wind in knots)
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Last 24hrE9
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E7E5E8E8E7E5E4E6
1 day agoCalmCalmS3NW3N3SE4SE4SE5E8
G14
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G17
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E7SE4E6SE5SE7E10
G15
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G14
2 days agoCalmW3NW3NW5CalmN3NE3N3N4CalmCalmCalmCalmCalmCalmCalmSE3S5CalmCalmCalmE3CalmCalm

Tide / Current Tables for Tomales Bay entrance, California
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Tomales Bay Entrance
Click for Map
Mon -- 12:00 AM PST     4.15 feet High Tide
Mon -- 04:47 AM PST     2.39 feet Low Tide
Mon -- 07:25 AM PST     Sunrise
Mon -- 07:44 AM PST     Moonrise
Mon -- 10:42 AM PST     6.06 feet High Tide
Mon -- 04:55 PM PST     Sunset
Mon -- 06:02 PM PST     -1.24 feet Low Tide
Mon -- 06:09 PM PST     Moonset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
4.13.93.52.92.52.42.73.44.35.35.965.54.531.50.1-0.9-1.2-0.9-0.11.22.53.6

Tide / Current Tables for Point Reyes, California Current
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Point Reyes
Click for Map
Mon -- 12:35 AM PST     -0.00 knots Slack
Mon -- 02:46 AM PST     -0.78 knots Max Ebb
Mon -- 05:50 AM PST     0.00 knots Slack
Mon -- 07:25 AM PST     Sunrise
Mon -- 07:44 AM PST     Moonrise
Mon -- 08:47 AM PST     0.90 knots Max Flood
Mon -- 11:34 AM PST     -0.00 knots Slack
Mon -- 02:58 PM PST     -1.65 knots Max Ebb
Mon -- 04:56 PM PST     Sunset
Mon -- 06:10 PM PST     Moonset
Mon -- 06:51 PM PST     0.00 knots Slack
Mon -- 09:53 PM PST     1.26 knots Max Flood
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
0.3-0.2-0.7-0.8-0.6-0.30.10.50.80.90.70.3-0.3-0.9-1.5-1.7-1.5-1-0.50.10.71.11.31.1

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 (8,2,3,4)
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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.