Monday, September24, 2018 L-36.com


Marine Weather and Tides
Avalon, CA

Version 3.4
What's New / NOTES
9/17/2018 XTide broke when 1and1 "upgraded" my server. It has been esculated. I am sorry for the problem.

Sunrise 6:41AMSunset 6:49PM Sunday September 23, 2018 10:30 PM PDT (05:30 UTC) Moonrise 6:29PMMoonset 5:17AM Illumination 100% Phase: Full Moon; Moon at 14 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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PZZ655 Inner Waters From Point Mugu To San Mateo Pt. Ca Including Santa Catalina And Anacapa Islands- 815 Pm Pdt Sun Sep 23 2018
Tonight..W winds 5 to 10 kt in the evening, becoming variable 10 kt or less. Wind waves 2 ft or less. Mixed swell W 2 ft at 5 seconds and S 2 ft at 14 seconds. Patchy fog.
Mon..Winds variable 10 kt or less, becoming W 10 kt in the afternoon. Wind waves 2 ft or less. Mixed swell W 2 ft at 8 seconds and S 2 ft at 17 seconds. Patchy fog.
Mon night..W winds 10 kt in the evening, becoming variable 10 kt or less. Wind waves 2 ft or less. Mixed swell W 2 ft at 7 seconds and S 2 ft at 16 seconds.
Tue..Winds variable 10 kt or less, becoming W 10 kt in the afternoon. Wind waves 2 ft or less. Mixed swell W 2 ft at 5 seconds and S 2 ft at 15 seconds.
Tue night..W winds 10 kt in the evening, becoming variable 10 kt or less. Wind waves 2 ft or less. Mixed swell W 2 ft at 6 seconds and S 2 ft at 15 seconds.
Wed..Winds variable 10 kt or less, becoming W 10 kt in the afternoon. Wind waves 2 ft or less. Mixed swell W 2 ft at 6 seconds and S 2 ft at 14 seconds.
Wed night..W winds 10 kt in the evening, becoming variable 10 kt or less. Wind waves 2 ft or less. Mixed swell W 2 ft at 6 seconds and S 2 ft at 15 seconds.
Thu..W winds 5 to 10 kt. Wind waves 2 ft or less. Mixed swell W 2 ft and S 2 ft.
Fri..W winds 5 to 10 kt. Wind waves 2 ft or less. Mixed swell W 2 ft and S 2 ft.
PZZ600 815 Pm Pdt Sun Sep 23 2018
Synopsis for the southern california coast and santa barbara channel including the channel islands national marine sanctuary and national park..At 02z...or 7 pm pdt, a 1032 mb surface high pressure system was centered about 750 nm west of portland, oregon, and a 1001 mb thermal low was located near the california-arizona border. Areas of dense fog will affect portions of the coastal waters overnight and into Monday morning.


7 Day Forecast for Marine Location Near Avalon, CA
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location: 33.51, -118.64     debug


Area Discussion for - Los Angeles/Oxnard, CA
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Fxus66 klox 240330
afdlox
area forecast discussion... Updated
national weather service los angeles oxnard ca
830 pm pdt Sun sep 23 2018

Synopsis 23 830 pm.

Afternoon temperatures will cool a bit early in the week, warm
through the end of the week, then cool again during the weekend.

Overnight and morning low clouds and fog will develop along the
coast and at times will push into the adjacent valleys.

Short term (sun-wed) 23 828 pm.

The latest fog product imagery shows the marine layer stratus
more entrenched this evening over the southern california bight,
while clinging the central coast. Stronger onshore flow has led to
a more organized marine layer stratus deck as previously
premised. A deep marine layer near 1000 feet currently at klax
will deepen some into Monday morning to around 1600 feet. Stratus
intrusion into the valleys looks a bit better later tonight and
into Monday morning. Latest GFS lamp and nam MOS guidance bring
some clouds and reduced visibilities into kbur around daybreak
Monday.

Onshore pressure gradients continue to trend slightly stronger
onshore tonight as an upper-level trough of low pressure over the
washington state brushes northern california. All signs point to
a cooling trend continuing into Monday. Locally gusty onshore
winds could impact the higher valleys such as the santa clarita
valley, the mountains, and antelope valley on Monday afternoon
and evening as onshore pressure gradients should be a tad
stronger.

The forecast was updated earlier to increase the marine layer
stratus coverage into Monday morning.

***from previous discussion***
for Monday night into Tuesday, there will not be too much change
in the low clouds and fog coverage as the even the la valleys will
again see some patchy low clouds and fog. However, the heights
start to rise and the onshore pressure gradients will weaken
enough to allow some warming across the forecast area, especially
in the mountains and deserts.

By Tuesday night into Wednesday, a rex block forms in the eastern
pacific, with a high latitude upper high and a cutoff low just to
its south. The cutoff low will be well off to the west and its
only effect will be to amplify a downstream ridge over southwest
california. Temperatures will rise across the entire district due
to higher heights and weaker onshore flow. At this point, the
marine clouds should become shallow enough to be restricted to
only the coastal sections.

Long term (thu-sun) 23 126 pm.

The warming trend will continue into Thursday, which should be the
warmest day of the next 7 days. High temperatures on Thursday will
soar close to triple digit territory in the warmest locations,
like the interior valleys and the deserts. Patchy low clouds and
fog should remain along the immediate coastal sections.

On Friday, the upper high off the pac NW coast breaks down and
allows trof energy to approach the washington and oregon coasts,
which in turn, will kick the cutoff low eastward and toward
northern california. Accordingly, heights will drop, the onshore
flow will again increase, and the temperatures will drop across
the region.

For next weekend, the extended models are in decent agreement that the
cutoff low will push into far northern california on Saturday.

Little change is expected for Sunday, before another deeper trof
pushes into northern california early next week.

Aviation 24 0017z.

At 21z, the marine layer depth was around 1400 feet deep at klax.

The top of the marine inversion was around 1950 feet with a
temperature near 21 degrees celsius. There was another inversion
up to around 2400 feet.

Moderate confidence in the current forecast. Timing of could be
up to one hour earlier than forecast or up to two to hours later.

North of point conception, lifr to ifr conditions will spread
into coastal and coastal valley terminals through 08z. Conditions
should become predominantly lifr between 05z and 08z. There is a
chance of vlifr conditions between 08z and 14z.VFR conditions
should redevelop between 16z and 17z.

South of point conception, ifr to MVFR conditions will spread
into coastal terminals through 10z. Higher confidence in MVFR
conditions south of koxr. There is a chance of ifr to MVFR
conditions for valley terminals between 10z and 16z.VFR
conditions should redevelop between 16z and 18z.

Klax... MVFR conditions will spread into klax as early as 03z or
as late as 09z.VFR conditions should develop between 16z and
17z, but there is a 30 percent chance that MVFR conditions delay
until as late as 20z. Any east winds that could develop between
11z and 15z should remain less than 5 knots.

Kbur... There is a 40 percent chance of ifr to MVFR conditions
between 10z and 16z. No wind impacts are expected at this time.

Marine 23 814 pm.

A marginal small craft advisory northwest of the channel islands
will continue through late tonight. There is a 30 percent chance
that a small craft advisory near point sal and point conception
south to the channel islands could be issued for Monday afternoon
and evening. Otherwise, conditions will remain below advisory
levels through Thursday.

Dense fog with visibility one nautical mile or less will affect
portions of the coastal waters through Monday morning. Highest
confidence for dense fog exists for the coastal waters north of
point conception, but the santa barbara channel may also be
affected late tonight and early Monday morning.

Lox watches warnings advisories
Ca... None.

Pz... Small craft advisory in effect until 3 am pdt Monday for
zones 670-673. (see laxmwwlox).

Hazard potential outlook (wed-sun)
No significant hazards expected.

Public... Hall sweet
aviation... Hall
marine... Hall
synopsis... Kj
weather.Gov losangeles


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
46222 - San Pedro, CA (092) 19 mi31 min 70°F2 ft
46262 23 mi31 min 70°F2 ft
OHBC1 - 9410660 - Los Angeles, CA 24 mi31 min 65°F1010.9 hPa (+1.2)
46221 - Santa Monica Bay, CA (028) 24 mi31 min 67°F2 ft
AGXC1 25 mi31 min 65°F 1011 hPa (+1.3)
46253 25 mi31 min 70°F2 ft
PFDC1 26 mi43 min S 1.9 G 2.9
PXAC1 27 mi43 min NNW 4.1 G 5.1
46025 - Santa Monica Basin - 33NM West Southwest of Santa Monica, CA 27 mi21 min WSW 3.9 G 5.8 64°F 71°F1010.5 hPa63°F
46256 27 mi31 min 65°F2 ft
PSXC1 28 mi43 min WNW 2.9 G 5.1
BAXC1 28 mi49 min NW 4.1 G 5.1
PFXC1 28 mi31 min 66°F
PRJC1 29 mi43 min WSW 6 G 7
ICAC1 - 9410840 - Santa Monica Pier 35 mi31 min 65°F 71°F1011.2 hPa (+1.1)

Wind History for Angels Gate, CA
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Avalon Catalina Airport, CA14 mi40 minNNW 410.00 miFair68°F18°F15%1010 hPa

Wind History from AVX (wind in knots)
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Last 24hrW6CalmS3CalmCalm--CalmCalmSW8CalmSE5W5CalmSW6SW7SW8SW8SW6SW6SW33CalmN5N4
1 day agoCalmCalmCalmS4NW4CalmS3SW5W4CalmCalm3CalmSW5SW7SW7SW7W9W9SW7W9W9SW7W6
2 days agoN3N3SE7SE10S7S6S4SE3SE4SE6CalmW5W4W7W345W5SW4Calm--CalmCalmCalm

Tide / Current Tables for Catalina Harbor, California
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Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.


Tide / Current Tables for Catalina Harbor, Santa Catalina Island, California
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Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.


Weather Map and Satellite Images
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wmap_P
GOES Local Image of Southwest    EDIT
NOTE: East coast views moved to GEOS-16. They are experimental and not well supported by NOAA so they may not be correct so be warned. This change required redoing a large amount of the GOES code. If the image you are expecting is not showing, please let me know. You may need to use the EDIT function to update your location.
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Other links: Northern Pacific     Contential US     Full GOES-East
Wind Forecast for Los Angeles/Oxnard, CA (1,6,7,8)
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Ground Weather Radar Station Santa Ana Mtns, CA
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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.