Thursday, June21, 2018 L-36.com


Marine Weather and Tides
Avalon, CA

Version 3.4
What's New / NOTES
5/20/2018 -- NOAA is having problems with the data feed that I use to draw the graphs. They are aware of the issue and working to resolve it. Sometimes changing the location by about a mile will give a correct graph. 3/3/2018 - There is a new GOES Satellite for the east coast that required rewriting that part of the code. Please report any issues.

Sunrise 5:42AMSunset 8:08PM Thursday June 21, 2018 7:14 AM PDT (14:14 UTC) Moonrise 2:16PMMoonset 1:45AM Illumination 57% Phase: First Quarter Moon; Moon at 8 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- 253 Am Pdt Thu Jun 21 2018
Today..SE winds 10 kt, becoming W 10 to 15 kt in the afternoon. Wind waves 2 ft or less. W swell 2 to 4 ft at 10 seconds. Patchy fog in the morning.
Tonight..W winds 10 to 15 kt in the evening, becoming se 5 to 10 kt. Wind waves 2 ft or less. W swell 2 to 3 ft at 10 seconds. Patchy fog.
Fri..SE winds 5 to 10 kt, becoming W 10 to 15 kt in the afternoon. Wind waves 2 ft or less. Mixed swell W 2 to 3 ft at 12 seconds and S 2 ft at 15 seconds. Patchy fog in the morning.
Fri night..W winds 10 to 15 kt, becoming se 5 to 10 kt after midnight. Wind waves 2 ft or less. W swell 2 to 3 ft at 10 seconds. Patchy fog.
Sat..SE winds 10 to 15 kt, becoming sw 10 kt in the afternoon. Wind waves 2 ft or less. W swell 2 to 3 ft at 8 seconds. Patchy fog in the morning.
Sat night..SW winds 5 to 10 kt, becoming se 10 to 15 kt after midnight. Wind waves 2 ft or less. Mixed swell W 2 to 3 ft at 9 seconds and sw 2 ft at 17 seconds. Patchy fog.
Sun..SE winds 10 to 15 kt, becoming sw 5 to 10 kt late. Wind waves 2 ft or less. Mixed swell W 2 ft and sw 2 ft. Patchy fog.
Mon..SW winds 5 to 10 kt. Wind waves 2 ft or less. Mixed swell W 2 ft and S 2 ft. Patchy fog.
PZZ600 253 Am Pdt Thu Jun 21 2018
Synopsis for the southern california coast and santa barbara channel including the channel islands national marine sanctuary and national park..At 09z...or 2 am pdt...a 1023 mb high was located about 600 nm west of san francisco. A 1005 mb thermal low was centered near needles. This pattern is expected to change little through Fri.

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 211200
afdlox
area forecast discussion
national weather service los angeles oxnard ca
500 am pdt Thu jun 21 2018

Synopsis 21 203 am.

High pressure aloft will result in well above normal temperatures
for inland areas through the weekend. For coastal and coastal
valley areas, a strong marine influence will moderate temperatures
through the weekend. For the first half of next week, high
pressure will strengthen slightly, resulting in slightly warmer
temperatures and a little less stratus and fog for the coasts and
coastal valleys.

Short term (tdy-sat) 21 203 am.

Overall. 00z models in good synoptic agreement through the period.

At upper levels, flat ridge will remain over the area today Friday
then will be shunted to the southwest on Saturday as a trough
moves into the great basin. Near the surface, onshore gradients
will continue through Saturday.

Forecast-wise, a very quiet and typical pattern for the official
first day of summer. Main issues through the short term period
will be stratus fog and temperatures. Currently, marine inversion
ranges from around 1000 feet across the central coast to around
2100 feet across the lax basin. Expect the inversion to remain
around this depth through Friday then deepen a little on Saturday
(due to h5 heights falls). So with good onshore gradients, stratus
should be able to push well into the coastal valleys each
night morning. Stratus should dissipate pretty well each
afternoon although some areas along the immediate coast could be
slow to clear (due to strength of the marine inversion).

As for temperatures, no major changes to previous thinking. For
the coasts and coastal valleys, expect persistence slight cooling
today due to more expansive marine influence. On Friday, the
onshore gradients slacken a bit which should allow for some
slight warming. However on Saturday, expect cooler temperatures
due to weakening upper ridge and strong onshore gradients. For the
mountains deserts interior valleys, a couple degrees warming
today and Friday then some slight cooling on Saturday.

As for winds, moderate to strong onshore gradients will generate
gusty afternoon evening winds across the mountains and deserts
today through Saturday. However, do not anticipate any widespread
advisory-level winds.

Long term (sun-wed) 21 203 am.

For the extended, 00z models continue to exhibit good synoptic
agreement. At upper levels, flat ridge will strengthen over the
area Sunday Monday then persist in strength Tuesday Wednesday.

Near the surface, moderate to strong onshore gradients will
continue.

Forecast-wise, expect only minor day-to-day changes through the
extended period, mainly due to the whims of the marine layer.

Marine inversion should show only minor variations in depth each
day. So with good onshore gradients, stratus fog should be able to
push into the coastal valleys each night morning. Other than the
marine layer stratus, skies should remain mostly clear through the
period. As for temperatures, will expect a little more cooling on
Sunday with some slight warming on Monday then near-persistent
temperatures Tuesday Wednesday.

Aviation 21 1159z.

At 1130z, the marine layer at klax was around 1800 ft deep. The
top of the inversion was around 3800 ft with a temp of 28c.

Widespread stratus in all coastal and valley areas with the
exception of the santa clarita valley and the interior valleys of
slo and sba counties. Conds were mostly ifr to lifr, except low
MVFR in some locations south of point conception. Expect skies to
clear by mid morning in the valleys and by noon across most of the
coastal plain. However, clouds may linger at some beach areas,
especially south of point conception.

Klax... Moderate confidence in the 12z taf. There is a 20-30%
chance of ifr CIGS between 12z and 16z. There is a 20-30% chance
that CIGS will linger through the afternoon. Any southeast winds
this morning should remain below 7 knots.

Kbur... Moderate confidence in the 12z taf. There is a 20-30%
chance of ifr CIGS between 12z and 16z. There is a 20% chance
that skies will remain clear tonight and conds will remainVFR.

Marine 21 329 am.

For the outer waters, high confidence in the forecast, with winds
increasing to SCA levels this morning, and continuing thru late
fri night or Sat morning, then winds will diminish. Winds may drop
below SCA levels briefly at times.

For the inner waters, north of point sal, good confidence in sca
level winds mainly during the afternoon evening hours thru fri.

For the inner waters south of point conception, winds and seas
are expected to remain below SCA levels thru sun. However, there
is a 30% chance of SCA level winds across the western half of the
santa barbara channel each afternoon evening thru fri.

Lox watches warnings advisories
Ca... None.

Pz... Small craft advisory in effect until 9 pm pdt this evening
for zone 645. (see laxmwwlox).

Small craft advisory in effect until 9 am pdt Saturday for
zones 670-673. (see laxmwwlox).

Small craft advisory in effect until 3 am pdt Saturday for
zone 676. (see laxmwwlox).

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

Public... Thompson
aviation... Db
marine... Db
synopsis... Thompson
weather.Gov losangeles


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
46222 - San Pedro, CA (092) 19 mi45 min 66°F3 ft
46262 23 mi45 min 66°F3 ft
46221 - Santa Monica Bay, CA (028) 24 mi45 min 66°F3 ft
OHBC1 - 9410660 - Los Angeles, CA 24 mi45 min 65°F1013.8 hPa
46253 25 mi45 min 66°F3 ft
46025 - Santa Monica Basin - 33NM West Southwest of Santa Monica, CA 27 mi35 min S 1.9 G 5.8 62°F 66°F1013.4 hPa62°F
46256 27 mi45 min 65°F2 ft
PSXC1 28 mi45 min SE 4.1 G 7
PFXC1 28 mi45 min E 4.1 G 6 63°F
PRJC1 29 mi45 min SE 4.1 G 5.1
ICAC1 - 9410840 - Santa Monica Pier 35 mi45 min S 4.1 G 4.1 64°F 64°F1013.8 hPa

Wind History for Angels Gate, CA
(wind in knots)    EDIT      (on/off)   Help
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Avalon Catalina Airport, CA14 mi84 minSSE 50.15 miFog56°F55°F100%1012.4 hPa

Wind History from AVX (wind in knots)
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Last 24hrCalmE4NE4W46W5W5NW5W4W6W4CalmNE4SE4CalmCalmCalmCalmCalmS3CalmCalmS5Calm
1 day agoSE4W3W5W6NW3W6W4NW4W5SW8SW7SW43CalmCalmSE3SE4SE7E5E4CalmCalmCalmN3
2 days agoW9W7W9W11W11W13W11SW13W14W13W13W14SW10SW10W11SW9SW7SW9SW8SW8SW5SW3S3E4

Tide / Current Tables for Catalina Harbor, California
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Catalina Harbor
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Thu -- 01:43 AM PDT     Moonset
Thu -- 05:06 AM PDT     3.61 feet High Tide
Thu -- 05:44 AM PDT     Sunrise
Thu -- 11:20 AM PDT     0.73 feet Low Tide
Thu -- 02:15 PM PDT     Moonrise
Thu -- 06:06 PM PDT     5.00 feet High Tide
Thu -- 08:07 PM PDT     Sunset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
1.61.92.433.43.63.532.41.71.10.80.81.32.23.14.14.754.84.33.42.51.7

Tide / Current Tables for Catalina Harbor, Santa Catalina Island, California
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Catalina Harbor
Click for Map
Thu -- 01:43 AM PDT     Moonset
Thu -- 04:59 AM PDT     3.60 feet High Tide
Thu -- 05:44 AM PDT     Sunrise
Thu -- 11:17 AM PDT     0.74 feet Low Tide
Thu -- 02:15 PM PDT     Moonrise
Thu -- 06:03 PM PDT     4.94 feet High Tide
Thu -- 08:06 PM PDT     Sunset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
1.71.92.433.43.63.432.31.610.80.81.32.23.144.74.94.74.23.42.51.7

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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Wind Forecast for Los Angeles/Oxnard, CA (10,2,3,4)
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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.