Sunday, September23, 2018 L-36.com


Marine Weather and Tides
Rossmoor, CA

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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 6:40AMSunset 6:47PM Sunday September 23, 2018 1:08 PM PDT (20:08 UTC) Moonrise 6:26PMMoonset 5:14AM Illumination 99% Phase: Waxing Gibbous; 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- 908 Am Pdt Sun Sep 23 2018
Today..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 sw 2 ft at 14 seconds. Patchy dense fog with vsby 1 nm or less in the morning.
Tonight..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 5 seconds and S 2 ft at 14 seconds.
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.
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 16 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..W winds 10 to 15 kt. Wind waves 2 ft or less. Mixed swell W 2 ft and S 2 ft.
Thu..W winds 10 to 15 kt. Wind waves 2 ft or less. Mixed swell W 2 ft and S 2 ft.
PZZ600 908 Am 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 15z...or 8 am pdt, a 1030 mb high pressure center was located about 800 nm west of portland, oregon, and a 1004 mb thermal low was over the california-arizona border. Patchy fog... Locally dense... Will linger into late morning.


7 Day Forecast for Marine Location Near Rossmoor, CA
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location: 33.79, -118.07     debug


Area Discussion for - Los Angeles/Oxnard, CA
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Fxus66 klox 231807
afdlox
area forecast discussion
national weather service los angeles oxnard ca
1107 am pdt Sun sep 23 2018

Aviation discussion updated...

Synopsis 23 732 am.

The daily temperatures will vary slightly but stay around normal
into next week with fair skies, except for an overnight coastal
marine layer that may spread to some valleys. A low may approach
by early next week, then a high will linger into Thursday, and
then a low should follow for the weekend.

Short term (tdy-tue) 23 908 am.

***update***
do not expect to make any updates to the forecast this morning.

Current forecast is on track with anticipated cooling as onshore
pressure gradients increase and the marine layer deepens in
response to an approaching trof that will cross the northern
portion of the state between now and Monday. Lower heights along
with the aforementioned changes in the pressure gradients and
marine layer depth will insure cooler temperatures, especially
inland where the effects will have greater impact. The marine
layer depth this morning was around 1500 feet and should deepen
further by Monday morning.

Additional cooling can be expected on Monday as the trof continues
to traverse the northern portion of the state on its way to the
great basin. The marine layer will likely get into the valleys
Monday morning. One change for the afternoon package will be to
increase the winds in the antelope valley for Monday afternoon and
evening as the onshore gradient from lax-dag looks just as strong
Monday as it is today.

***from previous discussion***
an upper trough will drop southeastward though the pacific nw
and into the great basin today and tonight. The marine layer will
likely deepen in response to this, with widespread low clouds
across the coastal plain likely pushing into many valley
locations. The WRF shows additional cooling at 950 and at 850 mb
on mon, so expect a few degrees of cooling in most areas, with
temps near to slightly below normal in most areas.

The upper trough will move into the center of the country mon
night and tue, but a weak baggy trough will hang back across
southern and eastern portions of the region. Expect mostly minor
changes to the marine layer depth and the night through morning
low cloud pattern Mon night Tue morning, with clouds widespread in
coastal areas and in many valley locations. Height rises and
weakening onshore flow may lead to a bit of warming on tue, with
the best warming in the mtns and deserts, and across slo and
northern sba counties where height rises will be greatest.

Long term (wed-sat) 23 415 am.

An upper high will be located well off the pac NW coast Tue night
and wed, as a large upper low tracks to its south, over 700 nm
west of point conception on wed. An upper ridge will develop along
and just off the west coast ahead of this upper low. Heights and
thicknesses will rise across the region, and the marine layer will
become more shallow, with night through morning low clouds likely
confined mostly to the coastal plain. Onshore gradients will
decrease a bit more and temps at 850 and 950 mb will rise. Expect
several degrees of warming in most areas on wed, with temps rising
to above normal levels. The upper low will slowly move toward ca
on thu, but heights and thicknesses will remain quite high. In
addition onshore gradients are forecast to become even weaker.

Expect little change in MAX temps across the region on thu, and
there could even be a bit more warming especially across l.A. And
vtu counties.

The ec and the GFS are now in very good agreement showing the
upper low tracking steadily toward the coast Thu night and fri.

Heights and thicknesses will lower, and onshore gradients will
increase. The marine layer should deepen a bit, with night thru
morning low clouds possibly reaching the valleys Fri morning.

Expect some cooling on fri, especially across slo and
sba counties, closest to the upper low. The upper low is now
forecast to move into the west coast late Fri night or sat. The
gfs maintains it as an upper low as it pushes into the bay area on
sat, while the ec shows it opening up and tracking farther north.

Either way, expect more significant and widespread cooling across
the region on sat, with any precip from this system likely
remaining north of the forecast area.

Aviation 23 1805z.

At 15z at klax... The inversion was around 1300 feet. The top of
the inversion was around 3000 feet with a temperature of about 24
degrees celsius.

Overall... Moderate confidence in the current tafs. The primary
uncertainty is regards the timing of the lowered conditions.

Ifr MVFR CIGS are lingering along portions of the ventura and los
angeles county coastline but will dissipate by midday. Similar
ifr MVFR conditions will return to all of the coastal areas tonight
and there is a twenty percent chance of ifr MVFR conditions getting
into the coastal adjacent valleys in the morning. Otherwise and
elsewhereVFR conditions will prevail.

Klax... Moderate confidence in the current taf. The primary
uncertainty is regards the timing of the lowered conditions.

Ifr MVFR CIGS are lingering in the vicinity but have cleared from
klax this morning. Similar conditions will return tonight after
06z. OtherwiseVFR conditions will prevail. East winds greater
than 8 kts will not occur during the forecast period.

Kbur... Moderate to high confidence in the current taf. There is a
twenty percent chance of ifr MVFR conditions 14z-17z. Otherwise
vfr conditions will prevail.

Marine 23 839 am.

For the outer waters... Winds across the northern and central
outer waters will weaken midday then strengthen again to small
craft advisory (sca) level through early Monday morning.

Otherwise, conditions will remain below SCA levels through
Thursday.

For the inner waters... Conditions will remain below SCA levels
through Thursday.

Pockets of dense fog with visibility one mile or less will remain
through this morning, especially north of point conception and
through the santa barbara channel.

Lox watches warnings advisories
Ca... None.

Pz... Small craft advisory in effect from 3 pm this afternoon to 3
am pdt Monday for zone 670. (see laxmwwlox).

Small craft advisory in effect from 1 pm this afternoon to 3
am pdt Monday for zone 673. (see laxmwwlox).

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

Public... Sweet db
aviation... Kj
marine... Kj
synopsis... Stu
weather.Gov losangeles


Weather Reporting Stations
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Wind History for Los Angeles Pier J, CA
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Los Alamitos Army Airfield, CA1 mi70 minWSW 57.00 miA Few Clouds77°F61°F58%1013.1 hPa
Long Beach, Long Beach Airport, CA5 mi75 minSE 410.00 miFair76°F61°F60%1012.7 hPa
Fullerton, Fullerton Municipal Airport, CA7 mi75 minN 010.00 miA Few Clouds80°F57°F47%1012.4 hPa
John Wayne-Orange County Airport, CA13 mi75 minS 710.00 miA Few Clouds77°F61°F58%1012.6 hPa
Torrance, Zamperini Field Airport, CA14 mi2.3 hrsWNW 810.00 miA Few Clouds72°F60°F69%1013.5 hPa
Hawthorne, Hawthorne Municipal Airport, CA17 mi75 minW 710.00 miFair73°F61°F66%1013.1 hPa
Los Angeles / USC Campus Downtown, CA19 mi81 minVar 310.00 miFair78°F61°F56%1012.4 hPa
Los Angeles, Los Angeles International Airport, CA20 mi75 minWSW 710.00 miA Few Clouds72°F61°F68%1013.1 hPa
El Monte, CA21 mi83 minN 010.00 miFair77°F57°F51%1012.9 hPa

Wind History from SLI (wind in knots)
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Last 24hrSW8W7--------------------------------S3SE3W3SW5SW5S9
1 day agoSW7SW7S9S6S5S4W5W5NW4----------------NW3N3CalmW4W3SW6SW6
2 days agoSW8SW9S9S10S8S8S7S5S4------E3E4CalmCalmCalmCalm----SW3SW6SW7SW8

Tide / Current Tables for Los Patos (highway bridge), 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 Long Beach, Inner Harbor, California
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Tide / Current data from XTide NOT FOR NAVIGATION
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Weather Map and Satellite Images
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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 (16,3,4,5)
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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.