Thursday, April24, 2014 L-36.com


Marine Weather and Tides
Dillon Beach, CA

Version 3.4
What's New / NOTES
11/18/2013 - I just got an email from NOAA saying all their network problems have been fixed. Sorry for the inconvenience.
11/16/2013 - NOAA worked over the last month to fix the load speed for our daily forecast. Then went from 60% fast loads to 99.8% fast loads.
8/5/2013 - Point forecast now loads in parallel and does not block rest of page.

Sunrise 6:19AMSunset 7:57PM Thursday April 24, 2014 9:15 AM PDT (16:15 UTC) Moonrise 2:34AMMoonset 2:22PM Illumination 24% Phase: Waning Crescent; Moon at 25 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- 840 Am Pdt Thu Apr 24 2014
Today..W winds 5 to 15 kt. Wind waves 1 to 3 ft. W swell 5 to 7 ft at 11 seconds. Slight chance of rain in the morning.
Tonight..NW winds 10 kt. Wind waves 2 ft or less. W swell 5 to 7 ft at 10 seconds. Chance of rain.
Fri..NW winds 5 to 15 kt. Wind waves 1 to 3 ft. W swell 5 to 7 ft at 10 seconds. Chance of showers and slight chance of Thunderstorms.
Fri night..NW winds 15 to 25 kt. Wind waves 3 to 5 ft. W swell 5 to 7 ft at 15 seconds and sw 3 ft at 22 seconds. Slight chance of showers in the evening.
Sat..W winds 5 to 15 kt. Wind waves 1 to 3 ft. W swell 7 to 9 ft at 14 seconds and sw 3 to 4 ft at 20 seconds. Slight chance of rain.
Sun..NW winds 5 to 15 kt. Wind waves 1 to 3 ft. W swell 5 to 7 ft...shifting to the nw 6 to 8 ft. SW swell 3 to 4 ft. Chance of showers.
Mon..NW winds 10 to 20 kt. Wind waves 2 to 4 ft. NW swell 6 to 8 ft and S 3 to 4 ft.
PZZ500 840 Am Pdt Thu Apr 24 2014
Synopsis for the central california coast and bays including Monterey bay national marine sanctuaries.. Generally light west to northwest winds will prevail along the central coast into the weekend. However...winds will be locally stronger south of point sur through tonight. A mixed swell will enter the southern coastal waters starting Friday night featuring a moderate sized medium period westerly swell and a long period southerly swell. The mixed swell will last into the weekend.

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 241140
afdmtr
area forecast discussion
national weather service san francisco bay area
440 am pdt Thu apr 24 2014

Synopsis A storm system will bring cooler temperatures and
chances for precipitation to the region late Thursday night
through Friday. Another weaker system could bring rain chances to
northern california Saturday night and Sunday. Then high pressure
will bring dry and significantly warmer conditions to the area
next week.

Discussion As of 2:55 am pdt Thursday... Satellite imagery shows
some low clouds over the coastal waters and extending into portions
of marin and sonoma counties. High clouds are starting to enter
into northern sonoma county as well. Temperatures and dew points
are running higher than yesterday at this time. With this head
start... As well as weakening high pressure remaining over the area

Another mild day is on tap for the district with highs expected
in the 60s and 70s.

An upper trough off the pacific northwest will drop southeast
into northern california tonight bringing a chance of rain to the
north bay late tonight and into the rest of the district Friday.

The upper low center is still forecast to move across central
california late Friday thus thunderstorm chances are still
warranted. The trough is forecast to move quickly eastward with
showers ending by Saturday morning. Another weaker system is
forecast to move across late Saturday night into Sunday... But
rain chances are expected to remain from about the bay area north.

High pressure is then progged to build in strongly over the
eastern pacific and onto the coast. This will bring in dry weather
and warmer temperatures through the rest of the work week. Highs
by Tuesday and Wednesday could push into the 90s across the
warmest inland sections of the district.

Aviation As of 4:35 am pdt Thursday... Mostly clear skies are
being reported around the forecast area this morning. Goes-w MVFR
probability image is showing stratus along the coast this morning.

This makes sense since halfmoon bay is reporting bkn013 at this
hour. The fort ord profiler is indicating a very shallow marine
layer less than 200 feet deep with a fairly well mixed atmosphere
above. Therefore... Stratus is not expected to impact the monterey
and salinas terminals tonight. In the sf bay area the sql sodar
does show evidence of a marine layer approximately 1000 feet deep.

Therefore cannot rule out stratus as a Sun rise surprise for koak
and ksfo.

Vicinity of ksfo...VFR is expected to prevail this morning with a
slight possibility of stratus impacting the terminals tempo
2412/2416 bkn005 bkn012. MVFR is anticipated by 0300z with a light
shower. West winds will increase to 15 to 20 kt this afternoon
with gusts to 25 kt possible.

Confidence is moderate
ksfo bridge approach... Similar to ksfo.

Monterey bay area terminals...VFR is expected this morning with
MVFR expected to begin around 0300z. Light showers are anticipated
to begin around midnight. Winds will increase out of the west this
afternoon reaching 10 to 15 kt.

Confidence is high

Marine As of 04:39 am pdt Thursday... Generally light west to
northwest winds will prevail along the central coast into the
weekend. However... Winds will be locally stronger south of point
sur through tonight. A mixed swell will enter the coastal waters
Friday featuring a moderate sized medium period westerly swell and
a long period southerly swell. The mixed swell will last into the
weekend.

Mtr watches/warnings/advisories
Tday Sca... San francisco bay north of the bay bridge from 2 pm
sca... San francisco bay south of the bay bridge from 2 pm
sca... Monterey bay from 2 pm
sca... Pigeon pt to pt pinos 0-10 nm from 2 pm
sca... Pt pinos to pt piedras blancas 0-10 nm
sca... Pt pinos to pt piedras blancas 10-60 nm
public forecast: sims
aviation/marine: larry
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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 mi25 min W 3.9 G 3.9 53°F 50°F6 ft1019.6 hPa (+1.2)
PRYC1 - 9415020 - Point Reyes, CA 18 mi27 min WNW 6 G 11 58°F 52°F1019.6 hPa
46214 - Point Reyes, CA (029) 33 mi49 min 54°F7 ft
46026 - SAN FRANCISCO - 18NM West of San Francisco, CA 35 mi25 min 1.9 G 3.9 52°F 6 ft
46237 - San Francisco Bar, CA (142) 37 mi44 min 54°F5 ft
RCMC1 - 9414863 - Richmond, CA 38 mi27 min SSW 5.1 G 6 57°F 58°F1019.5 hPa
PPXC1 - 9414847 - Richmond (Point Potrero), CA 40 mi27 min SW 8.9 G 9.9 56°F 1019.7 hPa
DPXC1 - 9415141 - Davis Point, San Pablo Bay, CA 40 mi27 min W 8.9 G 14 58°F 1018.9 hPa
FTPC1 - 9414290 - San Francisco, CA 41 mi27 min W 4.1 G 6 53°F 55°F1020.2 hPa
PXOC1 - 9414311 - San Francisco (Pier 1), CA 44 mi27 min W 5.1 G 8.9 56°F 1018.9 hPa
OBXC1 46 mi27 min 55°F 52°F
OMHC1 - 9414769 - Oakland Middle Harbor Met, CA 46 mi27 min W 8.9 G 12
OKXC1 - 9414776 - Oakland (Berth 34), CA 46 mi27 min W 8.9 G 9.9 55°F 1019.9 hPa
UPBC1 48 mi27 min W 13 G 15
MZXC1 - 9415102 - Martinez-Amorco CA 48 mi27 min SW 8.9 G 12 58°F 62°F1018.7 hPa50°F
AAMC1 - 9414750 - Alameda, CA 49 mi27 min W 5.1 G 8 57°F 62°F1019.7 hPa
LNDC1 49 mi27 min W 8 G 11 56°F 1019.8 hPa

Wind History for Point Reyes, CA
(wind in knots)    EDIT      (on/off)   Help
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Last
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NW13
G16
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G22
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G19
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G11
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W4
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G10
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NW19
W15
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G24
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G22
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G20
W13
G19
W12
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G20
NW12
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NW12
G15
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W14
G19
NW11
NW12
G15
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G14
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G17
NW12
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2 days
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NW7
W8
G11
NW4
G9
NW5
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G8
W12
G17
W11
W14
W7
G11
W6
W4
G9
S2
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W16
G22
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G24
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G22
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G21
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G23
W15
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W15
G19
W16
G21
NW18
G22
NW16
G20

Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Santa Rosa (awos), CA20 mi22 minW 410.00 miPartly Cloudy58°F50°F75%1018.4 hPa
Petaluma Muni, CA20 mi20 minWNW 810.00 miPartly Cloudy57°F55°F94%1020 hPa
Novato/Gnoss Field Airport, CA24 mi40 minN 010.00 miPartly Cloudy59°F53°F82%1019.6 hPa

Wind History from O69 (wind in knots)
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Last 24hrW10NW8NW8W10
G14
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W13W11
G17
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G22
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G20
NW4NW7NW4CalmNW6NW3NW3NW3NW3NW3CalmNW3W6
1 day agoNW12
G19
NW10
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W11
G15
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G28
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G29
W16
G25
W18
G25
W15
G21
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NW9NW7NW11NW7W3CalmN4W6W6W3N3NW3W4
2 days agoNW5NE3CalmNW4W11W8NW5W7W16
G20
W9W10W11W7W10NW6W12
G17
W7W10W11
G17
W11W8W8NW4W8

Tide / Current Tables for Tomales Bay entrance, California
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Tomales Bay Entrance
Click for Map
Thu -- 02:23 AM PDT     1.39 feet Low Tide
Thu -- 03:34 AM PDT     Moonrise
Thu -- 06:23 AM PDT     Sunrise
Thu -- 07:59 AM PDT     4.05 feet High Tide
Thu -- 02:36 PM PDT     -0.02 feet Low Tide
Thu -- 03:22 PM PDT     Moonset
Thu -- 07:56 PM PDT     Sunset
Thu -- 09:07 PM PDT     4.56 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
2.41.81.41.51.92.63.33.94.13.83.22.41.40.60.100.51.42.53.54.34.64.43.8

Tide / Current Tables for Point Reyes, California Current
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Point Reyes
Click for Map
Thu -- 03:17 AM PDT     0.00 knots Slack
Thu -- 03:34 AM PDT     Moonrise
Thu -- 06:06 AM PDT     0.81 knots Max Flood
Thu -- 06:24 AM PDT     Sunrise
Thu -- 08:54 AM PDT     -0.00 knots Slack
Thu -- 11:49 AM PDT     -1.11 knots Max Ebb
Thu -- 03:22 PM PDT     Moonset
Thu -- 03:35 PM PDT     0.00 knots Slack
Thu -- 06:40 PM PDT     1.09 knots Max Flood
Thu -- 07:56 PM PDT     Sunset
Thu -- 09:42 PM PDT     -0.00 knots Slack
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
-0.9-0.8-0.5-0.10.30.70.80.70.5-0-0.6-1-1.1-1-0.7-0.30.20.711.10.90.4-0.2-0.8

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 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.