Thursday, March23, 2017 L-36.com


Marine Weather and Tides
Avalon, 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 6:49AMSunset 7:09PM Thursday March 23, 2017 1:13 AM PDT (08:13 UTC) Moonrise 4:01AMMoonset 2:53PM Illumination 19% Phase: Waning Crescent; Moon at 25 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- 856 Pm Pdt Wed Mar 22 2017
.small craft advisory in effect through Thursday afternoon...
Tonight..Western portion...w winds 20 to 30 kt. Elsewhere...w winds 15 to 25 kt. Combined seas 6 to 8 ft dominant period 13 seconds.
Thu..Western portion...nw winds 20 to 30 kt becoming 15 to 20 kt in the afternoon. Elsewhere...nw winds 5 to 10 kt becoming W 10 to 15 kt in the afternoon. Combined seas 6 to 8 ft dominant period 13 seconds.
Thu night..Western portion...nw winds 20 to 25 kt becoming 10 to 15 kt after midnight. Elsewhere...w winds 10 to 15 kt becoming variable 10 kt or less after midnight. Combined seas 4 to 6 ft dominant period 13 seconds...subsiding to 2 to 4 ft dominant period 13 seconds after midnight.
Fri..E winds 5 to 10 kt in the morning...becoming variable 10 kt or less. Wind waves 2 ft or less. W swell 1 to 2 ft at 11 seconds.
Fri night..NW winds 10 to 15 kt. Wind waves 1 to 3 ft. W swell 1 to 2 ft at 11 seconds. Chance of showers.
Sat..W winds 10 to 15 kt. Wind waves 1 to 3 ft. W swell 2 to 3 ft. Chance of showers.
Sat night..W winds 10 to 15 kt. Wind waves 1 to 3 ft. W swell 2 to 4 ft.
Sun..W winds 15 to 20 kt with gusts to 25 kt. Combined seas 4 to 6 ft.
Mon..NW winds 15 to 25 kt with gusts to 30 kt. Combined seas 3 to 5 ft.
PZZ600 856 Pm Pdt Wed Mar 22 2017
Synopsis for the southern california coast and santa barbara channel including the channel islands national marine sanctuary and national park..At 03z...or 8 pm pst...a 995 mb low was 900 nm W of portland...with a cold front trailing sw of the the low. A 1026 mb high was located around 700 nm W of point conception. The high will shift E through Fri. The cold front is expected to move through the coastal waters Fri night and Sat.

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 230625
afdlox
area forecast discussion... Updated
national weather service los angeles/oxnard ca
1125 pm pdt Wed mar 22 2017

Synopsis
Isolated showers and thunderstorms will continue through this
evening. For Thursday and Friday, dry and warmer conditions are
expected along with some northerly winds. By Friday night and
Saturday, a weak storm system will bring another shot of rain to
the area. For early next week, high pressure will build over the
area, resulting in dry and warmer conditions.

Short term (wed-sat)
scattered showers and thunderstorms developed this afternoon across
portions of the forecast area, mainly over the mtns and into the
antelope vly, in response to a cold upper level trof. The activity
has been stubborn into early this evening, with scattered showers
and thunderstorms persisting mainly over vtu/l.A. County mtns,
antelope vly and santa clarita vly. Several spotter reports from the
santa clarita vly indicated thunderstorms with lots of small hail
and heavy rain. As the steering flow shifts more nw, some activity
was beginning to push into vlys S of the santa clarita vly.

Scattered showers and thunderstorms should continue for a while this
evening before ending probably by late this evening. Otherwise,
partly to mostly cloudy skies should prevail for the most part
overnight, altho a clearing trend should take place after midnight.

There may even be a few upslope rain and snow showers on the N mtn
slopes overnight, with snow levels down to 4500 feet or lower not
out of the question, possibly affecting travel over the grapevine.

Gusty mainly sub-advisory W to NW winds will continue for many areas
this evening before diminishing overnight, altho should persist in
the mtns and antelope vly Thu late tonight.

Rather vigorous upper level trof moving over ca this evening. The
upper trof will move quickly E overnight into Thu morning, with
upper level ridging building into the area by Thu afternoon. The
upper ridge will linger over the area into Fri morning, with a fast-
moving upper trof and surface cold front expected to approach the ca
coast by later in the day. This upper trof will move quickly into ca
later Fri night into Sat morning then move E of the region sat
afternoon.

Dry weather can be expected Thu thru Fri morning, with clear to
partly cloudy skies overall, except becoming mostly cloudy over
slo/sba counties Fri morning as the upper trof and surface cold
front approaches. A few showers may move into the central coast fri
afternoon, but then the front is expected to push in Fri night with
widespread mainly light rain over slo/sba counties, and a chance of
rain and mountain snow developing for vtu/l.A. Counties. The chances
of rain and mountain snow should diminish thru the day on Sat as the
cold front weakens and moves E of the area. Rainfall amounts on sat
are difficult to pin down, but should be one quarter to one half
inch over slo/sba counties, except up to an inch possible in the
nwrn slo county foothills. For vtu/l.A. Counties, rainfall looks to
be one tenth of an inch or less. Skies should be mostly cloudy
across the forecast area on sat.

Temps are forecast to be several degrees below normal on thu, then
warm to slightly below normal on fri, except slightly above normal
in the antelope vly. Temps should cool back down to several degrees
below normal again on sat. Highs in the warmest vlys and inland
coastal areas should reach the mid to upper 60s thu, upper 60s to
low 70s fri, and only into the mid 60s sat.

***from previous discussion***

Long term (sun-wed)
conditions will be warmer and drier on Sunday as a weak ridge
moves into the region... Which is followed by a weak trough on
Monday and a slight chance of light showers. There continue to be
significant differences in the models beyond Monday however...

with the possibility of a stronger ridge over the region or a low
pressure center that drops down to the east of the region. The
second solution provides a possibility of unsettled weather for
Tuesday and Wednesday. Have kept the forecast on the warm and dry
side but this discrepancy will bear watching.

Aviation
23/0600z
at 0545z, there was no marine inversion present at klax.

Good confidence in tafs. There is a 30 percent chc that northerly
winds will be strong enough to affect ksmo and klax.

Klax... High confidence in cavu conds through 24/08z. Lower
confidence about clouds after 24/08z with equal chcs of low
clouds arriving between 09z and 12z. There is also a 20 percent
chc that the clouds will be ifr. There is a 30 percent chc of a 20
kt cross wind from 09z-16z.

Kbur... High confidence in taf. There is a 30 percent chc of
35012kt from 09z-16z.

Marine
22/900 pm
gusty NW winds will be at SCA levels tonight through Thursday
across much of the coastal waters. There will be a few gale force
gusts between san nicolas island and santa rosa island during
this time. The winds will weaken late Thursday night into Friday.

There is a 60 percent chance SCA winds will affect the outer
coastal waters this weekend.

Lox watches/warnings/advisories
Ca... Beach hazards statement in effect through Thursday afternoon
for zones 39>41-87. (see laxcfwlox).

Pz... Small craft advisory in effect until 3 am pdt Thursday for
zones 645-650-670. (see laxmwwlox).

Small craft advisory in effect until 4 pm pdt Thursday for
zone 655. (see laxmwwlox).

Small craft advisory in effect until 9 pm pdt Thursday for
zones 673-676. (see laxmwwlox).

Hazard potential outlook (sat-wed)
a weak rain event is expected Friday night and Saturday, with
minimal impacts. High surf and strong rip currents are likely
Friday into Sunday.

Public... Sirard/kj
aviation... Asr
marine... Sweet/sirard
synopsis... Rat
weather.Gov/losangeles


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
46222 - San Pedro, CA (092) 19 mi55 min 61°F8 ft
OHBC1 - 9410660 - Los Angeles, CA 24 mi44 min 61°F1015.6 hPa
46221 - Santa Monica Bay, CA (028) 24 mi44 min 60°F8 ft
AGXC1 25 mi44 min WNW 12 G 14 58°F 1015.7 hPa
46253 25 mi44 min 60°F7 ft
PFDC1 26 mi44 min W 7 G 11
PXAC1 27 mi44 min NW 7 G 11
46256 27 mi52 min 60°F6 ft
46025 - Santa Monica Basin - 33NM West Southwest of Santa Monica, CA 27 mi34 min WNW 27 G 35 57°F 59°F1016.1 hPa49°F
PSXC1 28 mi44 min W 8 G 12
BAXC1 28 mi44 min WNW 12 G 14
PFXC1 28 mi44 min WNW 9.9 G 14 58°F 1015 hPa
PRJC1 29 mi44 min WNW 8.9 G 12
ICAC1 - 9410840 - Santa Monica Pier 35 mi44 min NNW 4.1 G 5.1 58°F 62°F1015.9 hPa

Wind History for Angels Gate, CA
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Avalon Catalina Airport, CA14 mi23 minWNW 15 G 2310.00 miOvercast50°F45°F83%1016.2 hPa

Wind History from AVX (wind in knots)
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Last 24hrW3W6W5W8W10W7W8W7NW9W10NW9W10W10W16W16W18
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1 day agoNW3CalmCalmCalmS3S3SW6S3SE8S6S73SW96Calm63SE9S13S4S7SW5SW7SW7
2 days agoW3CalmSW56W7SW5CalmCalmCalmNE4CalmE74E5W7W9W10SW7W5W4W5W6W4Calm

Tide / Current Tables for Catalina Harbor, California
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Catalina Harbor
Click for Map
Thu -- 01:11 AM PDT     2.06 feet Low Tide
Thu -- 04:00 AM PDT     Moonrise
Thu -- 06:53 AM PDT     Sunrise
Thu -- 06:57 AM PDT     4.40 feet High Tide
Thu -- 02:00 PM PDT     -0.00 feet Low Tide
Thu -- 02:52 PM PDT     Moonset
Thu -- 07:08 PM PDT     Sunset
Thu -- 08:28 PM PDT     3.75 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
2.32.12.22.53.13.84.24.44.23.62.81.80.90.2-00.20.91.72.63.33.73.73.42.8

Tide / Current Tables for Catalina Harbor, Santa Catalina Island, California
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Catalina Harbor
Click for Map
Thu -- 01:06 AM PDT     2.11 feet Low Tide
Thu -- 04:00 AM PDT     Moonrise
Thu -- 06:53 AM PDT     Sunrise
Thu -- 06:54 AM PDT     4.34 feet High Tide
Thu -- 02:00 PM PDT     -0.03 feet Low Tide
Thu -- 02:52 PM PDT     Moonset
Thu -- 07:08 PM PDT     Sunset
Thu -- 08:24 PM PDT     3.70 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
2.32.12.22.63.13.74.24.34.13.52.71.70.80.2-00.20.81.72.63.33.73.63.32.7

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 (4,6,7,8)
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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.