Thursday, June22, 2017 L-36.com


Marine Weather and Tides
Avalon, CA

Version 3.4
What's New / NOTES
5/23/2017 - Worked with NOAA again to speed up the 7 day forecast load times. Thanks to them for being responsive.
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.

Sunrise 5:42AMSunset 8:09PM Thursday June 22, 2017 1:23 PM PDT (20:23 UTC) Moonrise 4:34AMMoonset 6:44PM Illumination 2% Phase: Waning Crescent; Moon at 28 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- 901 Am Pdt Thu Jun 22 2017
Today..Winds variable 10 kt or less...becoming sw 10 to 15 kt in the afternoon. Wind waves 2 ft or less. Mixed swell W 2 ft at 10 seconds and S 3 ft at 14 seconds. Areas of dense fog with vsby 1 nm or less in the morning.
Tonight..W winds 10 to 15 kt in the evening...becoming variable 10 kt or less. Wind waves 2 ft or less. Mixed swell W 2 ft at 10 seconds and S 3 ft at 14 seconds. Patchy dense fog with vsby 1 nm or less after midnight.
Fri..Winds variable 10 kt or less...becoming W 10 to 15 kt in the afternoon. Wind waves 2 ft or less. Mixed swell W 2 ft at 10 seconds and sw 3 ft at 16 seconds. Patchy dense fog with vsby 1 nm or less in the morning.
Fri night..W winds 10 to 15 kt...becoming 5 to 10 kt after midnight. Wind waves 2 ft or less. Mixed swell W 2 ft at 10 seconds and sw 3 ft at 16 seconds. Patchy dense fog with vsby 1 nm or less after midnight.
Sat..Winds variable 10 kt or less...becoming W 10 to 15 kt in the afternoon. Wind waves 1 to 3 ft. Mixed swell W 2 ft at 10 seconds and sw 3 ft at 16 seconds. Patchy dense fog with vsby 1 nm or less in the morning.
Sat night..W winds 10 to 15 kt...becoming 5 to 10 kt after midnight. Wind waves 1 to 3 ft. Mixed swell W 2 ft at 10 seconds and sw 3 ft at 16 seconds. Areas of fog after midnight.
Sun..W winds 10 to 15 kt. Wind waves 2 ft or less. Mixed swell W 2 to 3 ft and sw 2 ft. Areas of fog.
Mon..W winds 15 to 20 kt. Combined seas 3 to 5 ft. Areas of fog.
PZZ600 901 Am Pdt Thu Jun 22 2017
Synopsis for the southern california coast and santa barbara channel including the channel islands national marine sanctuary and national park..At 15z...or 8 am pdt...a 1031 mb high was centered 700 nm northwest of san francisco and a 1000 mb thermal trough was centered over east arizona. Areas of dense fog may affect much of the coastal waters through the week.

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 221841
afdlox
area forecast discussion
national weather service los angeles oxnard ca
1141 am pdt Thu jun 22 2017

Synopsis
The high will bring temperatures that are well above normal for the
inland areas and around normal at the coast into Monday. The skies
should be fair except where the onshore flow brings in a coastal
overnight marine layer through next week. A low will approach by
Tuesday for a cooling trend and increasing cloudiness into midweek.

Short term (tdy-sat)
balloon soundings indicate a lowering of the marine lyr north pt
conception but an slight increase in the south with also a good
increase in the south to north gradients. This is making for
opposing temperature trends this morning with northern areas
warmer (in interior slo there is double digit warming over
yesterday at this time), while in the south we're seeing as much
as 15 degrees of cooling from yesterday, particularly in the lower
coastal valleys. Given these strong south to north gradient
trends it's going to be much harder for the marine lyr to clear
from malibu to sba and highs south of pt conception will likely be
several degrees cooler than yesterday. Still quite hot though in
the mountains and antelope valley above the marine lyr where heat
warnings and advisories remain in effect. Up north the opposite is
expected, especially inland. Will make some adjustments to the
forecast this morning to account for these changes.

Not much change in this scenario Friday as gradients remain more
or less the same and the strength and location of the ridge aloft
are also unchanged. By late Friday night and Saturday there is a
shift in the gradients to northerly and this should lead to
earlier clearing and a warming trend, mainly south of pt
conception.

Long term (sun-wed)
looks like one more day of real heat on Sunday. The ridge actually
slides a little to east but hgts remain at 593 dm. The GFS keeps
max temps the same while the ec has a little bit more of an
offshore push and actually warms things up a bit making it the
warmest day of the next 7. Gave a small nod to the ec and bumped
temps up a degree or two from Saturday. The heat products look
good through Sunday.

Both the ec and GFS agree that the ridge will break down Mon and
tue. There should be some cooling each day away from the beaches
(which will see little or no change from the previous days. The
biggest drops will be felt in the vlys where the sea breezy will
finally be able to reach.

Disagreement for next Wednesday. The ec brings in a little ridge
while the GFS continues the trofing. Coordination and
collaboration between the surrounding offices resulted in a
preference for the cooler GFS pattern.

Aviation 22 1800z.

At 1748z at klax... The marine layer depth was 1900 feet. The top
of the inversion was around 3500 feet with a temperature of about
27 degrees celsius.

The marine layer will clear from most coastal sections, but some
taf sites will not clear until late afternoon or not at all. Most
taf sites will haveVFR conditions except for MVFR conditions
where the marine clouds fail to clear out. The marine clouds will
return to the coastal and valley sections with ifr conditions again
tonight into Friday morning. There is good confidence in the 18z
taf forecast.

Klax... Good confidence in the 18z taf. There is a 30 percent
chance of the marine clouds moving in plus or minus two or more
hours than the forecasted time.

Kbur... Good confidence in the 18z taf. There is a 30 percent
chance of the marine clouds moving in plus or minus two or more
hours than the forecasted time.

Marine 22 900 am.

Winds will remain below small craft advisory (sca) level through
Friday then increase to above SCA levels in the outer waters Saturday
through Monday.

A 2-3 foot south swell will last through much of the week and
pose a risk for breaking waves nearshore. People boating or
kayaking near shore should use extra caution this week. A small
(2-3 feet) short period swell will impact the santa barbara
channel and santa monica basin over the weekend.

Although the coverage of dense fog is easing a bit, there is still
the possibility of patchy dense fog during the night and
mornings.

Fire weather 22 1030 am.

Hot and dry conditions will continue through Monday of next week.

The hot conditions will also bring the potential for plume
dominated fires which can create their own intense winds. Onshore
winds will peak today and Friday, which will focus the concerns to
interior los angeles county including the angeles national
forest, highway 14 corridor, and the foothills of the antelope
valley. Weaker but locally breezy northwest winds should follow
Saturday through Monday... Shifting the area of concern to santa
barbara county and the tejon pass.

Tropical moisture aloft will move through the area Friday night and
Saturday. While this should have little impact on humidities at the
surface, this has a 10 percent chance of producing high-based
thunderstorms. Confidence is incredibly low with this, but the
potential for dry lightning exists.

A red flag warning is in effect through 9pm this evening for
the interior los angeles county mountains and foothills where the
driest and windiest conditions of the period are expected.

Otherwise, with rapidly drying fuels vegetation, elevated fire
weather concerns through Monday, primarily over all interior
sections away from the influence of the marine layer. If fire
ignition occurs, dangerous fire behavior should be expected. As
such, the public should be extreme careful when handling potential
ignition sources such as cigarettes, campfires, hand torches and
metallic weed trimmers.

Lox watches warnings advisories
Ca... Heat advisory in effect until 9 pm pdt Sunday for zones
38-52-53. (see laxnpwlox).

Beach hazards statement in effect through Friday evening for
zones 40-41-87. (see laxcfwlox).

Excessive heat warning in effect until 9 pm pdt Sunday for
zones 54-59. (see laxnpwlox).

Red flag warning in effect until 9 pm pdt this evening for
zone 254. (see laxrfwlox).

Pz... None.

Hazard potential outlook (sat-wed)
hot temperatures with potential heat impacts will continue for
the antelope valley and san gabriel mountains through Sunday and
possibly other areas as well.

Public... Mw rorke
aviation... Sweet
marine... Sweet
fire... Kittell
synopsis... Stu
weather.Gov losangeles


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
46222 - San Pedro, CA (092) 19 mi64 min 65°F4 ft
OHBC1 - 9410660 - Los Angeles, CA 24 mi53 min 62°F1011.2 hPa
46221 - Santa Monica Bay, CA (028) 24 mi53 min 64°F3 ft
AGXC1 25 mi53 min E 2.9 G 2.9 67°F 1011.2 hPa
46253 25 mi53 min 65°F4 ft
PFDC1 26 mi53 min E 1.9 G 4.1
PXAC1 27 mi59 min S 8 G 9.9
46256 27 mi61 min 63°F6 ft
46025 - Santa Monica Basin - 33NM West Southwest of Santa Monica, CA 27 mi43 min SSE 9.7 G 12 62°F 67°F1010.8 hPa61°F
PSXC1 28 mi53 min SSE 7 G 8.9
BAXC1 28 mi53 min SE 4.1 G 6
PFXC1 28 mi53 min S 2.9 G 4.1 68°F
PRJC1 29 mi53 min SSE 1.9 G 2.9
ICAC1 - 9410840 - Santa Monica Pier 35 mi53 min SSW 9.9 G 12 63°F 67°F1011.2 hPa

Wind History for Angels Gate, CA
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Avalon Catalina Airport, CA14 mi32 minVar 510.00 miFair71°F60°F68%1009.1 hPa

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Last 24hrW6CalmS53CalmCalmCalmNE4NE5E5SE5SE3SE4SE5E4S3SW3CalmN4CalmSW3NW5W45
1 day agoSW3W46W6W6W5W8W7W6NW6NW4NW3NW3W6W4CalmNE3CalmCalmCalm3SE4SW3S4
2 days agoW7W8W8W11W11W6W9W7W5W8W7W5NW5NW4NW4NW5W6W4CalmCalmS443SW4

Tide / Current Tables for Catalina Harbor, California
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Catalina Harbor
Click for Map
Thu -- 03:09 AM PDT     -0.97 feet Low Tide
Thu -- 04:34 AM PDT     Moonrise
Thu -- 05:45 AM PDT     Sunrise
Thu -- 09:24 AM PDT     3.91 feet High Tide
Thu -- 02:28 PM PDT     1.44 feet Low Tide
Thu -- 06:42 PM PDT     Moonset
Thu -- 08:07 PM PDT     Sunset
Thu -- 08:44 PM PDT     6.56 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
20.5-0.5-1-0.70.11.22.43.43.93.83.32.61.91.51.52.13.14.45.66.46.564.8

Tide / Current Tables for Catalina Harbor, Santa Catalina Island, California
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Catalina Harbor
Click for Map
Thu -- 03:09 AM PDT     -0.93 feet Low Tide
Thu -- 04:34 AM PDT     Moonrise
Thu -- 05:45 AM PDT     Sunrise
Thu -- 09:22 AM PDT     3.85 feet High Tide
Thu -- 02:28 PM PDT     1.37 feet Low Tide
Thu -- 06:42 PM PDT     Moonset
Thu -- 08:07 PM PDT     Sunset
Thu -- 08:42 PM PDT     6.54 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
20.5-0.5-0.9-0.70.11.22.43.43.83.83.32.61.91.41.523.14.45.66.46.55.94.7

Weather Map and Satellite Images
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Weather Map
wmap_P
IR Satellite Image from GEOS
west_satellite

GOES Local Image of Southwest    EDIT
Geos

Wind Forecast for Los Angeles/Oxnard, CA (16,3,4,5)
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Ground Weather Radar Station Santa Ana Mtns, 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.