Monday, May22, 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 5:51AMSunset 8:23PM Monday May 22, 2017 2:28 PM PDT (21:28 UTC) Moonrise 3:03AMMoonset 3:52PM Illumination 8% Phase: Waning Crescent; Moon at 27 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- 213 Pm Pdt Mon May 22 2017
Tonight..W winds 5 to 15 kt. Wind waves 1 to 3 ft. NW swell 3 to 4 ft at 9 seconds. Patchy fog after midnight.
Tue..S winds 10 kt. Wind waves 2 ft or less. NW swell 3 to 4 ft at 9 seconds. Patchy fog in the morning.
Tue night..SE winds 10 kt. Wind waves 2 ft or less. NW swell 3 to 4 ft at 9 seconds. Patchy fog after midnight.
Wed..SE winds 5 to 15 kt. Wind waves 1 to 3 ft. NW swell 4 to 6 ft at 11 seconds. Patchy fog in the morning.
Wed night..SE winds 10 kt. Wind waves 2 ft or less. NW swell 5 to 7 ft at 11 seconds.
Thu..W winds 10 kt. Wind waves 2 ft or less. NW swell 5 to 7 ft.
Fri..W winds 10 kt. Wind waves 2 ft or less. NW swell 4 to 6 ft.
Sat..NW winds 5 to 15 kt. Wind waves 1 to 3 ft. NW swell 3 to 4 ft. Patchy fog.
PZZ500 213 Pm Pdt Mon May 22 2017
Synopsis for the central california coast and bays including the Monterey bay..Greater farallones...and cordell bank national marine sanctuaries... Northerly flow will persist with light to moderate winds and small seas. High pressure will strengthen north of the region increasing winds midweek. Winds will be strongest north of point reyes, especially the outer waters.

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 222013
afdmtr
area forecast discussion
national weather service san francisco bay area
113 pm pdt Mon may 22 2017

Synopsis Look for cooler conditions through most of the week as
a onshore flow combines with the marine layer. Minor warming is
then expected during the upcoming weekend especially for inland
locations.

Discussion As of 1:15 pm pdt Monday... As expected temperatures
are running cooler for all locations away from the coast today
with many spots 5 to 12 degrees less than values from Sunday.

Current readings show a wide range from 50s and 60s to parts of
the coast with 70s and 80s inland. Still a few hours of heating,
so would expect the warmest inland spots to again get into the
90s, however the number of locations should be less than
yesterday. Satellite shows widespread clouds along the water and
with the minor onshore flow expected to continue, likely that many
of the local beaches will see little to no sunshine today.

Tonight will be a near repeat of last night with patchy fog along
the coast and to some inland spots. Lows will mostly be in the 50s
with 60s above 1500 feet.

Synoptically the ridge of high pressure in charge will begin to
flatten out through the week as a system dives down from canada
and works into the northern rockies. 500 mb heights will drop from
587 dm today to 573 dm by Thursday. Inland locations that have
been in the 90s the past few days will drop back into the upper
60s to the lower 70s. Closer to the coast widespread mid 50s to
mid 60s can be expected. With the onshore flow in place, much of
the week could by quite grey at the coast.

Longer range guidance shows the ridge trying to rebuild by the
weekend although heights will be less than the past few days. By
Sunday inland spots will be back in the mid 70s to mid 80s away
from the coast with 60s to mid 70s near the water.

Aviation As of 10:26 am pdt Monday... For 18z tafs. Shallow
marine layer is eroding back to the coast as 18z tafs become
valid.VFR at all terminals this afternoon with breezy sea breeze
conditions this afternoon. Shallow marine layer will return
tonight with fog possible.

Vicinity of ksfo...VFR through early tonight. Based on latest
model guidance and what happened this morning will bring low
clouds back into sf bay. The low confidence area will once again
be sfo itself. Went with a pessimistic forecast tonight with a few
hours of clouds/fog tomorrow before a quick burn off.

Sfo bridge approach... Similar to ksfo.

Monterey bay terminals...VFR this afternoon. CIGS return this
evening with ifr to lifr conditions possible.

Marine As of 10:23 am pdt Monday... High pressure building over
the pacific northwest will maintain light to moderate
northwesterly winds through midweek. Winds will increase midweek
as a thermal trough develops along the coast tightening the
pressure gradients over the northern outer waters. Strongest winds
are expected over the outer waters while the inner waters remain
mostly light.

Mtr watches/warnings/advisories
Tngt Sca... Sf bay until 9 pm
public forecast: bell
aviation: mm
marine: mm
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 mi28 min SSW 3.9 G 7.8 51°F 50°F1016 hPa (-0.3)51°F
PRYC1 - 9415020 - Point Reyes, CA 18 mi40 min SSE 5.1 G 6 55°F 56°F1015.4 hPa
46214 - Point Reyes, CA (029) 33 mi28 min 52°F5 ft
46026 - SAN FRANCISCO - 18NM West of San Francisco, CA 35 mi38 min SSW 3.9 G 7.8 52°F 57°F4 ft1015.8 hPa (-0.3)
46237 - San Francisco Bar, CA (142) 37 mi88 min 55°F4 ft
RCMC1 - 9414863 - Richmond, CA 38 mi40 min SSE 4.1 G 6 62°F 59°F1014.4 hPa
TIBC1 - Tiburon Pier, San Francisco Bay, CA 38 mi41 min SE 8.9 62°F 1014 hPa
DPXC1 - 9415141 - Davis Point, San Pablo Bay, CA 40 mi40 min WSW 5.1 G 6 69°F 1013.7 hPa
PPXC1 - 9414847 - Richmond (Point Potrero), CA 40 mi40 min SSW 12 G 16 58°F 1014.8 hPa
FTPC1 - 9414290 - San Francisco, CA 41 mi40 min WSW 6 G 12 55°F 55°F1015.4 hPa
PXSC1 44 mi40 min 62°F 52°F
PXOC1 - 9414311 - San Francisco (Pier 1), CA 44 mi40 min W 7 G 14 63°F 1013.7 hPa
OBXC1 46 mi40 min 59°F 54°F
OMHC1 - 9414769 - Oakland Middle Harbor Met, CA 46 mi40 min W 11 G 12
OKXC1 - 9414776 - Oakland (Berth 34), CA 46 mi40 min WNW 9.9 G 13 58°F 1014.7 hPa
UPBC1 48 mi40 min WNW 9.9 G 14
MZXC1 - 9415102 - Martinez-Amorco CA 48 mi40 min WNW 13 G 14 74°F 65°F1013.6 hPa51°F
LNDC1 49 mi40 min WNW 6 G 8 66°F 1014.6 hPa
AAMC1 - 9414750 - Alameda, CA 49 mi40 min W 5.1 G 8.9 65°F 64°F1015.1 hPa

Wind History for Point Reyes, CA
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Santa Rosa, Santa Rosa Sonoma County Airport, CA20 mi35 minSSW 510.00 miFair84°F59°F43%1012.5 hPa
Petaluma Municipal Airport, CA20 mi4.1 hrsN 010.00 miFair63°F55°F77%1015.6 hPa
Novato / Gnoss Field, CA24 mi33 minVar 310.00 miFair84°F60°F45%1013.9 hPa

Wind History from O69 (wind in knots)
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Last 24hrCalmCalm3W96NW7
G13
W11
G16
NW7NW55NW5NW44NW54W66CalmCalmW4CalmNW3Calm3
1 day agoCalmCalm4NW7W9NW66NW54
G10
NW4NW4NW6CalmNW4CalmCalmCalmCalmCalmCalmCalmNW4CalmCalm
2 days agoCalm3SW4W96
G12
NW7NW7NW6
G11
W644CalmCalmCalmCalmCalmCalmW4CalmCalmCalmCalmCalmCalm

Tide / Current Tables for Tomales Bay entrance, California
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Tomales Bay Entrance
Click for Map
Mon -- 03:44 AM PDT     0.48 feet Low Tide
Mon -- 04:03 AM PDT     Moonrise
Mon -- 05:55 AM PDT     Sunrise
Mon -- 09:31 AM PDT     3.62 feet High Tide
Mon -- 03:21 PM PDT     0.71 feet Low Tide
Mon -- 04:51 PM PDT     Moonset
Mon -- 08:22 PM PDT     Sunset
Mon -- 09:41 PM PDT     5.12 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
321.10.60.50.81.52.43.13.63.63.22.51.81.10.70.81.32.33.44.455.14.6

Tide / Current Tables for Point Reyes, California Current
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Point Reyes
Click for Map
Mon -- 12:43 AM PDT     -1.20 knots Max Ebb
Mon -- 04:03 AM PDT     Moonrise
Mon -- 04:33 AM PDT     0.00 knots Slack
Mon -- 05:56 AM PDT     Sunrise
Mon -- 07:22 AM PDT     0.96 knots Max Flood
Mon -- 10:27 AM PDT     -0.00 knots Slack
Mon -- 01:02 PM PDT     -1.01 knots Max Ebb
Mon -- 04:29 PM PDT     0.00 knots Slack
Mon -- 04:51 PM PDT     Moonset
Mon -- 07:27 PM PDT     1.06 knots Max Flood
Mon -- 08:21 PM PDT     Sunset
Mon -- 10:29 PM PDT     -0.00 knots Slack
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
-1.1-1.2-1-0.7-0.30.20.70.90.90.70.2-0.3-0.8-1-0.9-0.6-0.20.30.7110.80.3-0.3

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 (17,4,5,8)
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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.