Monday, October23, 2017 L-36.com


Marine Weather and Tides
Avalon, CA

Version 3.4
What's New / NOTES
6/25/2017 - NOAA is having a major issue that impact the 7 day forecast load times. Many users are reporting problems. The issue has been reported.
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 7:04AMSunset 6:10PM Monday October 23, 2017 4:34 AM PDT (11:34 UTC) Moonrise 10:32AMMoonset 9:10PM Illumination 11% Phase: Waxing Crescent; Moon at 3 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- 234 Am Pdt Mon Oct 23 2017
.small craft advisory in effect from 6 am pdt this morning through Tuesday afternoon...
Today..From point mugu to santa Monica, ne winds 15 to 25 kt, becoming nw to N 10 to 15 kt by late afternoon. Elsewhere, winds variable 10 kt or less becoming nw 10 to 15 kt in the afternoon. Combined seas 3 to 4 ft dominant period 17 seconds.
Tonight..From point mugu to santa Monica, N winds 15 to 20 kt becoming ne 20 to 30 kt after midnight. Elsewhere, W winds 10 to 15 kt becoming ne after midnight. Combined seas 3 to 5 ft dominant period 13 seconds.
Tue..From point mugu to santa Monica, ne winds 20 to 30 kt with local gusts to 35 kt. Elsewhere, ne winds 15 to 25 kt. Combined seas 4 to 6 ft dominant period 17 seconds.
Tue night..From point mugu to santa Monica, ne winds 15 to 20 kt with gusts to 25 kt. Elsewhere, N winds 10 to 15 kt becoming ne 5 to 10 kt after midnight. Wind waves 2 to 4 ft. Mixed swell W 2 to 3 ft at 15 seconds and S 2 ft at 14 seconds.
Wed..From point mugu to santa Monica, ne winds 15 to 25 kt with local gusts to 30 kt, becoming nw 10 to 15 kt in the afternoon. Elsewhere, ne winds 5 to 10 kt, becoming nw 10 kt in the afternoon. Combined seas 3 to 5 ft dominant period 14 seconds.
Wed night..NW winds 10 kt in the evening, becoming variable 10 kt or less. Wind waves 2 ft or less. Mixed swell W 2 ft at 13 seconds and S 2 ft at 13 seconds.
Thu..W winds 5 to 10 kt. Wind waves 2 ft or less. Mixed swell W 2 ft and S 2 ft.
Fri..NW winds 5 to 10 kt. Wind waves 2 ft or less. Mixed swell W 2 ft and S 2 ft.
PZZ600 234 Am Pdt Mon Oct 23 2017
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 1033 mb high was over oregon and an inverted trough was along the california coast. Gusty ne winds will form over the nearshore waters at times through Wednesday.

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 231010
afdlox
area forecast discussion
national weather service los angeles oxnard ca
310 am pdt Mon oct 23 2017

Synopsis
Gusty offshore winds will strengthen and become more widespread
through Tuesday as many locations have record heat on Monday and
Tuesday. Winds ease on Wednesday and temperatures begin to cool
and possibly drop to near normal by Friday.

Short term (tdy-wed)
high pressure aloft will dominate the weather through Wednesday.

Hgts will be around 594 dm today and Tuesday and will fall to 591
dm on Wednesday as the ridge weakens. The high pressure and
offshore flow will keep skies clear through the period.

The offshore flow will be the major story for the next 3 days.

Current gradients are -5.4 mb from kdag and a healthy -7.5 mb from
kbfl. On Tuesday the east to west kdag gradient peaks at -8.3
while the north to south kbfl gradient weakens some to -4.8 mb.

This will switch the winds to more of an easterly direction. On
Wednesday both grads weaken to -6 mb from the east and -3 mb from
the north. No real winds yet but they will start in the mtns in a
few hours and then mix down to the vlys then the coasts during the dawn
to mid morning period. Winds will peak Tuesday. Fortunately there
is zero thermal support and only a little upper support so this
will be a gradient driven event which for the most part can not
reach warning levels... Only strong advisory levels (50 to 55 mph
gusts). There will be a few warning level gusts across the
ridgetops but thats about it. The winds will diminish Wednesday
but will remain at advisory levels
the very high hgts (15 dm higher than normal) and offshore flow
will combine to bring record heat both today and Tuesday (highs
95-105 common) and somewhat uncomfortably warm nights (lows 65-75
common). This heat poses a concern for heat-related illnesses,
especially for the elderly and children. Heat warnings advisories
are in effect for much of the area. Please see the product
laxnpwlox for a detailed description of all heat and wind
warnings and advisories. Major fire concerns exist as well (see
fire weather section below).

Weaker offshore flow Wednesday along with lowering heights will
bring cooling to most areas, most significant north of point
conception and near the coast. However, temperatures will remain
well above normal with widespread 80s and 90s.

Long term (thu-sun)
bad news for people hoping for a cool down both the GFS and the ec
now agree that a tall and skinny 588 dm ridge will set up on
Thursday and persist into Friday only to be replaced by a smaller
588 dm ridge poking in from the SW over the weekend. The only good
news is that there will only be weak offshore flow in the morning
and weak onshore flow during the afternoon so MAX temps will not
be anywhere as warm as they will be early this week still max
temps will be 6 to 12 degrees above normal over much of the area.

Where there was once hope of some marine layer clouds now it looks
like clear skies will prevail as there is no eddy forecast or any
other low cloud formation mechanisms.

Aviation
23 0830z
at 0830z, there was a surface-based inversion at klax. The top of
the inversion was 1300 feet with a temperature of 30 degrees
celsius.

Moderate to strong northeast wind will develop today and continue
through Tuesday. Gusty surface winds and or llws will impact ksbp,
koxr, kcma, klgb, kbur and kvny. Conditions will remainVFR
through the TAF period.

Klax... High confidence in 12z taf. There is a 20% chance of
a 9 knot east wind 12z-17z.

Kbur... High confidence in 12z taf. Llws light turbulence will be
likely 12z-22z. There is a 30% chance of north to northeast winds
surfacing 12z-18z.

Marine
23 130 am
for the outer waters, high confidence in current forecast. Winds
and seas are expected to remain below small craft advisory (sca)
levels through Friday for pzz670 673. For pzz676, there is a 40%
chance of SCA level northeast winds today and Tuesday.

For the inner waters, high confidence in current forecast. For the
waters north of point sal, winds and seas will remain below sca
levels through Friday. For the waters south of point conception,
sca level winds are likely from ventura south to santa monica
today through Wednesday with the strongest winds in the morning to
early afternoon hours. Oh Tuesday morning, there is a 40% chance
of gale force gusts, but the coverage of these gusts are expected
to be localized.

There is a chance that the northeast winds will reach avalon and
two harbors on Tuesday, but since this is a hot santa ana event
the likelihood of significant winds out that far is small. 30
percent chance of 10-20 kt winds in the harbors, 10 percent chance
of 15-25 kt.

Fire weather
22 400 pm
from today through Wednesday, a prolonged duration of gusty santa
ana winds with hot and very dry conditions is expected. Northeast
winds are expected to gust between 30 and 45 mph across wind
favored passes and canyons of los angeles and ventura through
tonight. The santa ana winds are expected to increase in areal
coverage and intensity Monday into Tuesday, with strongest winds
on Tuesday gusting between 45 and 60 mph across wind favored
portions of los angeles and ventura counties. During the peak of
the offshore wind event on Tuesday, the lax-daggett gradient is
projected to peak at around -7.5 mb with better upper level wind
support up to 850 mb level. Moderate offshore winds and low
humidities are now expected to continue Tuesday night into
Wednesday morning, prompting the extension of the red flag warning
through Wednesday. The hottest and driest conditions are expected
on Monday and Tuesday, when triple digit heat and humidities
lowering into single digits and lower teens will be common across
coastal and valley areas. Northeast to east winds gusting between
25 and 40 mph will also bring elevated to brief critical fire
weather concerns to portions of san luis obispo and santa barbara
counties through Tuesday, especially across the central coast. Of
particular concern will be Monday when the gusty offshore winds
combine with humidities lowering into the teens(locally single
digits) and temperatures rising to between 90 and 100 degrees
along the central coast.

Very warm and dry conditions during the overnight hours in the
mountains, foothills, and wind prone areas will add to this long
duration fire weather threat. The duration, strength, and
widespread nature of this santa ana wind event combined with the
extreme heat and very dry fuels will bring the most dangerous fire
weather conditions that southwest california has seen in the past
few years. If fire ignition occurs, there will be the potential
for very rapid spread of wildfire with long range spotting and
extreme fire behavior that could lead to a threat to life and
property.

Lox watches warnings advisories
Ca... Heat advisory in effect from 10 am this morning to 8 pm pdt
Tuesday for zones 34>36-39-88. (see laxnpwlox).

Wind advisory in effect until 2 pm pdt Wednesday for zones
40-41-44>46-53-54-88-547. (see laxnpwlox).

Excessive heat warning in effect from 10 am this morning to 8
pm pdt Tuesday for zones 40-41-44>46-87-547. (see laxnpwlox).

Red flag warning in effect until 6 pm pdt Wednesday for zones
240-241-244>246-253-254-288-547-548. (see laxrfwlox).

Pz... Small craft advisory in effect until 3 pm pdt Tuesday for
zones 650-655. (see laxmwwlox).

Hazard potential outlook (wed-sun)
heat advisory level temperatures may continue for many areas into
Wednesday. Gusty northeast winds will likely impact wind prone
areas of los angeles and ventura counties through early
Wednesday. Hot, dry and windy conditions will likely bring
continued critical fire weather conditions to some areas
Wednesday.

Public... Rorke
aviation... Rat
marine... Rat kittell
fire... Gomberg
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 mi35 min 67°F4 ft
46262 23 mi35 min 67°F4 ft
OHBC1 - 9410660 - Los Angeles, CA 24 mi47 min 67°F1017.2 hPa
46221 - Santa Monica Bay, CA (028) 24 mi35 min 65°F3 ft
AGXC1 25 mi47 min NNW 9.9 G 9.9 74°F 1017 hPa
46253 25 mi35 min 68°F4 ft
PFDC1 26 mi53 min NW 8.9 G 8.9
PXAC1 27 mi53 min NNW 5.1 G 6
46025 - Santa Monica Basin - 33NM West Southwest of Santa Monica, CA 27 mi35 min NNW 5.8 G 5.8 68°F1016.4 hPa (-0.9)
46256 27 mi43 min 66°F6 ft
PSXC1 28 mi47 min N 8 G 8.9
BAXC1 28 mi47 min N 6 G 7
PFXC1 28 mi47 min N 9.9 G 11 72°F
PRJC1 29 mi47 min N 9.9 G 11
ICAC1 - 9410840 - Santa Monica Pier 35 mi53 min NE 11 G 12 77°F 65°F1017.2 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 mi44 minENE 910.00 miFair80°F32°F17%1016.2 hPa

Wind History from AVX (wind in knots)
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Last 24hrNE6NE8NE6N4N6NW5NW6NW7NW5N6NW5NW8NW5NW5W5NW7NW9NW5N6N7NE7NE9NE10NE9
1 day agoN10N7NW6N5N6NW5N7NE5N5N65N7N5N4N6NW8NW5NW5NW5N5N7N8N5NE6
2 days agoW16
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W15W16W14W14W17W14W13W12W14W15W9NW10NW8N8N9N14

Tide / Current Tables for Catalina Harbor, California
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Catalina Harbor
Click for Map
Mon -- 12:19 AM PDT     3.68 feet High Tide
Mon -- 05:18 AM PDT     2.20 feet Low Tide
Mon -- 07:05 AM PDT     Sunrise
Mon -- 10:30 AM PDT     Moonrise
Mon -- 11:31 AM PDT     5.06 feet High Tide
Mon -- 06:10 PM PDT     Sunset
Mon -- 06:48 PM PDT     0.58 feet Low Tide
Mon -- 09:09 PM PDT     Moonset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
3.73.63.32.82.42.22.32.63.23.94.6554.63.82.921.20.70.60.81.422.7

Tide / Current Tables for Catalina Harbor, Santa Catalina Island, California
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Catalina Harbor
Click for Map
Mon -- 12:19 AM PDT     3.68 feet High Tide
Mon -- 05:18 AM PDT     2.21 feet Low Tide
Mon -- 07:05 AM PDT     Sunrise
Mon -- 10:30 AM PDT     Moonrise
Mon -- 11:26 AM PDT     5.03 feet High Tide
Mon -- 06:10 PM PDT     Sunset
Mon -- 06:48 PM PDT     0.57 feet Low Tide
Mon -- 09:09 PM PDT     Moonset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
3.73.63.32.82.42.22.32.73.344.6554.63.82.921.20.70.60.81.42.12.7

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 (7,2,3,4)
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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.