Friday, February24, 2017 L-36.com


Marine Weather and Tides
Dillon Beach, 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 6:46AMSunset 6:01PM Friday February 24, 2017 8:31 PM PST (04:31 UTC) Moonrise 5:36AMMoonset 4:19PM Illumination 1% Phase: Waning Crescent; Moon at 29 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- 240 Pm Pst Fri Feb 24 2017
Tonight..NW winds 5 to 15 kt. Wind waves 3 ft in the evening... Becoming 2 ft or less. W swell 4 to 5 ft at 15 seconds. Slight chance of showers in the evening, then chance of showers after midnight.
Sat..SE winds 5 to 15 kt. Wind waves 1 to 3 ft. W swell 5 to 6 ft at 14 seconds. Chance of showers.
Sat night..E winds 5 to 15 kt. Wind waves 1 to 3 ft. W swell 4 to 5 ft at 14 seconds. Chance of showers in the evening, then slight chance of showers after midnight.
Sun..NW winds 5 to 15 kt. Wind waves 1 to 3 ft. NW swell 4 to 6 ft at 17 seconds. Slight chance of showers in the morning, then chance of showers in the afternoon.
Sun night..NW winds 5 to 15 kt. Wind waves 1 to 3 ft. W swell 4 to 5 ft at 16 seconds. Chance of showers.
Mon..NW winds 10 to 20 kt. Wind waves 2 to 4 ft. NW swell 5 to 7 ft. Chance of showers, then slight chance of showers.
Tue..NW winds 5 to 15 kt. Wind waves 1 to 3 ft. NW swell 4 to 5 ft...becoming 4 to 6 ft.
Wed..NW winds 10 to 20 kt. Wind waves 2 to 4 ft. NW swell 5 to 7 ft.
PZZ500 240 Pm Pst Fri Feb 24 2017
Synopsis for the central california coast and bays including the Monterey bay..Greater farallones...and cordell bank national marine sanctuaries... A low pressure system will drop southward along the coast this weekend replacing today's weakening high pressure. Winds will turn southerly on Saturday before returning to a northwest flow by Sunday as the low dissipates. Generally mild winds and seas are expected through the forecast period. Light showers will move in Saturday morning from the north and progress southward along the coast throughout the day ending by Monday.

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 250036
afdmtr
area forecast discussion
national weather service san francisco bay area
436 pm pst Fri feb 24 2017

Synopsis Drier and cooler conditions are forecast through
tonight with chilly overnight temperatures. Unsettled conditions
return over the weekend with a storm system moving in from the
north. A longer stretch of dry weather is expected starting the
middle of next week.

Discussion As of 2:00 pm pst Friday... A minor ridge of high
pressure built into our region today allowing for mostly sunny
conditions along with fairly light winds. After a cold start this
morning temperatures have bounced back a bit ahead of yesterday
with many spots in the low to mid 50s. Locations will drop back
into the 30s to lower 40s tonight -- generally 2 to 4 degrees
warmer than this morning.

Synoptically an upper level low and surface low near the
bc/washington coast will track southward along the coast through
Saturday night followed by a second system that will dive into
norcal by Sunday evening. Model (outside of the canadian/gem) have
continued to back off on the moisture associated with the first
feature impacting our region. Latest runs keep almost all of the
precipitation to our west with just some minor showers forecast
over our cwa. Ivt values used to indicate moisture transport have
also been reduced with even the upper end of the ensemble members
barely getting to 150 kg/m/s. Still looks like the best shot for
moisture from the first feature will be Saturday evening/night
although amounts will likely be under a tenth (if the 18z nam
verifies totals will be closer to zero).

The second system will bring a more instability and another shot
of cooler air. A few showers can be expected some possibly with
small hail. Snow levels will also drop with many spots down in the
2500 to 3000 feet later on Saturday into Sunday. Minor
accumulations can be expected with locally more than 3" possible.

Showers will tapper off on Tuesday. By the time it is all said and
done, totals should mostly be under 0.15" with locally higher
amounts up to 1/3" along coastal ranges.

By the middle of next week a substantial change in the pattern
will start to take place as a ridge of high pressure beings to
build off the coast. At the same time temperatures at the surface and
aloft will increase to above normal values. 850 mb temps that are
currently -2 to -3c will be 14 to 16 c by the end of the week.

This will translate to widespread 60s and possibly a few 70s.

Longer range guidance keeps a stronger than normal ridge over our
entire region potentially through most of the month of march.

After two extremely wet months, we could be looking at a complete
reversal for next month.

Aviation As of 4:30 pm pst Friday...VFR conditions this
afternoon with just a few cumulus clouds over the hills.

Models show increasing low level moisture after 06z which may lead
to MVFR CIGS in some places after midnight.

Vicinity of ksfo...VFR through the airport evening rush. MVFR
possible by 08z-10z. West winds to 15 kt decreasing after 04z.

Sfo bridge approach... Similar to sfo.

Monterey bay terminals... Increasing clouds after 06z with marginal
vfr/MVFR CIGS after 10z.

Marine As of 4:30 pm pst Friday... A low pressure system will
drop southward along the coast this weekend replacing today's
weakening high pressure. Winds will turn southerly on Saturday
before returning to a northwest flow by Sunday as the low
dissipates. Generally mild winds and seas are expected through the
forecast period. Light showers will move in Saturday morning from
the north and progress southward along the coast throughout the
day ending by Monday.

Mtr watches/warnings/advisories
Tngt None.

Public forecast: bell
aviation: W pi
marine: anna
visit us at

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 mi31 min WNW 9.7 G 14 49°F 54°F1023.8 hPa (+0.0)39°F
PRYC1 - 9415020 - Point Reyes, CA 18 mi37 min W 6 G 8 48°F 54°F1023.2 hPa
46214 - Point Reyes, CA (029) 33 mi39 min 54°F7 ft
46026 - SAN FRANCISCO - 18NM West of San Francisco, CA 35 mi41 min WNW 5.8 G 9.7 49°F 53°F5 ft1023.9 hPa (+0.0)
46237 - San Francisco Bar, CA (142) 37 mi61 min 53°F4 ft
RCMC1 - 9414863 - Richmond, CA 38 mi37 min W 4.1 G 6 49°F 54°F1023.3 hPa
PPXC1 - 9414847 - Richmond (Point Potrero), CA 40 mi37 min WNW 8 G 11 50°F 1023.7 hPa
DPXC1 - 9415141 - Davis Point, San Pablo Bay, CA 40 mi37 min W 7 G 11 49°F 1023.3 hPa
FTPC1 - 9414290 - San Francisco, CA 41 mi37 min WNW 5.1 G 8 49°F 53°F1023.9 hPa
PXSC1 44 mi37 min 49°F 38°F
OBXC1 46 mi37 min 49°F 39°F
OMHC1 - 9414769 - Oakland Middle Harbor Met, CA 46 mi37 min WNW 7 G 11
OKXC1 - 9414776 - Oakland (Berth 34), CA 46 mi43 min NW 8.9 G 9.9 49°F 1023.6 hPa
UPBC1 48 mi37 min W 14 G 17
MZXC1 - 9415102 - Martinez-Amorco CA 48 mi37 min W 9.9 G 12 48°F 52°F1023.5 hPa
AAMC1 - 9414750 - Alameda, CA 49 mi37 min W 6 G 9.9 50°F 55°F1023.9 hPa
LNDC1 49 mi37 min NW 6 G 9.9 49°F 1023.5 hPa

Wind History for Point Reyes, CA
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Last
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NW20
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G24
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W12
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G30
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Santa Rosa, Santa Rosa Sonoma County Airport, CA20 mi38 minSSW 510.00 miFair44°F35°F71%1022.4 hPa
Petaluma Municipal Airport, CA20 mi36 minN 010.00 miA Few Clouds41°F37°F87%1024.4 hPa
Novato / Gnoss Field, CA24 mi36 minN 010.00 miFair43°F37°F81%1023.7 hPa

Wind History from O69 (wind in knots)
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Last 24hrCalmCalmW4W5NW3CalmW3CalmCalmCalmN3W3CalmCalmNW4W7SW6W4SW9W9W9NW3NW3NW3
1 day agoNW8NW4--W4NW3NW5NW6NW4NW3NW5NW4CalmNW6N6NW5NW5NW6NW5W11
G15
W13
G16
W11CalmW3NW3
2 days agoNW3CalmNW4NW3NW3W3CalmCalmCalmCalmN3W6NW6NW6NW9
G15
NW6NW7W16
G21
W19
G27
--NW5NW6W9NW5

Tide / Current Tables for Tomales Bay entrance, California
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Tomales Bay Entrance
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Fri -- 03:41 AM PST     2.17 feet Low Tide
Fri -- 05:35 AM PST     Moonrise
Fri -- 06:50 AM PST     Sunrise
Fri -- 09:29 AM PST     5.20 feet High Tide
Fri -- 04:19 PM PST     Moonset
Fri -- 04:37 PM PST     -0.40 feet Low Tide
Fri -- 06:00 PM PST     Sunset
Fri -- 11:05 PM PST     4.12 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
3.63.12.62.32.22.53.13.94.75.15.14.63.72.51.30.3-0.3-0.40.112.13.23.94.1

Tide / Current Tables for Point Reyes, California Current
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Point Reyes
Click for Map
Fri -- 01:16 AM PST     -0.76 knots Max Ebb
Fri -- 04:38 AM PST     0.00 knots Slack
Fri -- 05:35 AM PST     Moonrise
Fri -- 06:50 AM PST     Sunrise
Fri -- 07:27 AM PST     0.86 knots Max Flood
Fri -- 10:20 AM PST     -0.00 knots Slack
Fri -- 01:28 PM PST     -1.40 knots Max Ebb
Fri -- 04:19 PM PST     Moonset
Fri -- 05:22 PM PST     0.00 knots Slack
Fri -- 06:00 PM PST     Sunset
Fri -- 08:20 PM PST     1.11 knots Max Flood
Fri -- 11:33 PM PST     -0.00 knots Slack
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
-0.5-0.8-0.7-0.5-0.20.20.60.80.80.60.2-0.4-1-1.4-1.4-1.1-0.7-0.20.40.91.11.10.80.3

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 (23,6,7,8)
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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.