Sunday, April22, 2018 L-36.com


Marine Weather and Tides
Rancho Palos Verdes, CA

Version 3.4
What's New / NOTES
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.
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.

Sunrise 6:12AMSunset 7:30PM Saturday April 21, 2018 11:51 PM PDT (06:51 UTC) Moonrise 11:08AMMoonset 12:36AM Illumination 44% Phase: First Quarter Moon; Moon at 7 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- 823 Pm Pdt Sat Apr 21 2018
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 to 3 ft at 10 seconds and S 2 ft at 16 seconds. Patchy dense fog with vsby 1 nm or less.
Sun..SE winds 5 to 10 kt, becoming sw in the afternoon. Wind waves 2 ft or less. Mixed swell W 2 ft at 9 seconds and S 2 ft at 15 seconds. Patchy dense fog with vsby 1 nm or less.
Sun 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 14 seconds and S 2 ft at 15 seconds. Patchy dense fog with vsby 1 nm or less.
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 14 seconds and S 2 ft at 14 seconds. Patchy dense fog with vsby 1 nm or less in the morning.
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 13 seconds and S 2 ft at 13 seconds. Patchy fog after midnight.
Tue..Winds variable 10 kt or less, becoming W 10 kt in the afternoon. Wind waves 2 ft or less. S swell 2 ft at 13 seconds. Patchy fog in the morning.
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 14 seconds and S 2 ft at 13 seconds. Patchy fog after midnight.
Wed..W winds 10 to 15 kt. Wind waves 2 ft or less. Mixed swell W 2 ft and S 3 ft. Patchy fog.
Thu..W winds 10 to 15 kt. Wind waves 2 ft or less. S swell 3 ft. Patchy fog.
PZZ600 823 Pm Pdt Sat Apr 21 2018
Synopsis for the southern california coast and santa barbara channel including the channel islands national marine sanctuary and national park..At 02z...or 7 pm pdt...a 1032 mb surface high was centered about 250 nm west of portland, while a 1009 mb thermal low was along the california-arizona border. The high will push into oregon through Monday. A shallow marine inversion will possibly bring patchy dense fog across the coastal waters tonight and Sunday morning.

7 Day Forecast for Marine Location Near Rancho Palos Verdes, CA
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location: 33.7, -118.31     debug


Area Discussion for - Los Angeles/Oxnard, CA
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Fxus66 klox 220544
afdlox
area forecast discussion
national weather service los angeles oxnard ca
1044 pm pdt Sat apr 21 2018

Synopsis 21 706 pm.

High pressure aloft will bring warm and dry weather to southwest
california through early this coming week. By midweek low pressure
will begin to approach the area along with increasing onshore flow
and a gradual cooling trend. There will be overnight low clouds
and fog near the coast early in the period, moving further inland
each night by midweek.

Short term (sat-tue) 21 839 pm.

Flattening ridging aloft to the north will linger while a weak
upper-level trough about 140 miles south-southwest of los angeles
will continue to move over the region. Mainly high level
cloudiness will continue to stream over the area into Sunday.

Weak onshore flow in place this evening will strengthen into
Sunday and possibly into Monday as broader troughing develops
along the california coast. Ridging aloft will struggle to hold
on, fighting the trough to the southwest. The ridge should win out
keeping a dry and warmer than normal weather pattern in place into
midweek. Onshore flow will keep the coastal area closer to normal
with periods of night through morning low clouds and fog.

***from previous discussion ***
12z nambufr soundings at klax showed a pretty strong marine
inversion at 250 ft deep late tonight, then increasing to only 400
ft deep for late Sun night early Mon morning. NAM boundary layer
moisture fields indicate not much in the way of low clouds tonight
with light offshore flow over slo sba counties and also for
inland areas of vtu l.A. Counties, and a weak eddy just off the
coast S of point conception. Any low clouds tonight will likely be
confined mainly to the immediate coast, but should remain over
the coastal plain. Expanded low clouds are indicated mainly for
coastal areas Sun night into Mon morning with patchy dense fog not
out of the question. Patchy low clouds and dense fog may sneak into
the southern san gabriel vly by early Mon morning as well.

Additional low clouds and fog with a deeper marine inversion is
expected for the coast and some vlys Mon night into Tue morning as
well.

Otherwise, mostly clear skies will prevail across the forecast area
tonight through tue, with afternoon and early evening onshore
breezes expected. Temps will remain several degrees above normal
away from the immediate coast on sun, then cool slightly but remain
slightly above normal for most areas for mon. Temps on Tue should
drop several more degrees to near normal to slightly above normal
for many areas. Highs in the warmest vlys will reach mainly into the
80s on sun, upper 70s to mid 80s mon, and mid 70s to low 80s on tue.

Highs in the antelope vly are forecast to be well above seasonal
norms during the period, with readings in the 80s for the most
part.

Long term (wed-sat) 21 223 pm.

The ec and GFS are in generally good agreement on wed, then start to
become quite different thru the end of the week. As a result, the
extended forecast confidence starts out pretty good for Wed then
goes down as we head into next sat. The upper trof over the E pac is
forecast to deepen into an upper level low about 600 nm W and NW of
the forecast area by Wed evening. The upper low will meander over
the E pac thru thu, then the ec tracks it NE and into far NRN ca by
early sat, while the GFS wobbles it about well off the central ca
coast thru Fri night then pushes it to just off the sba county coast
by late sat, with a surface low pressure area just off the central
coast at that time. The GFS does bring showers into the forecast
area sat, but decided with so much uncertainty between the ec and
gfs, kept the wx dry thru the day with ghost pops under 15 percent.

The forecast will remain dry Wed thru sat, with night and morning
low clouds and fog expected for the coastal and vly areas at least
thru fri. Otherwise, skies should be mostly clear thru Fri then turn
partly cloudy on sat.

A gradual cooling trend is forecast thru the extended period. Temps
wed should be near normal to slightly above normal, then drop to
near to slightly below normal across the region by Fri and sat.

Highs in the warmest vlys should reach the mid 70s to lower 80s wed,
70s to around 80 Thu and fri, and 70s on sat.

Aviation 22 0543z.

At 05z, the marine layer depth was around 400 feet at klax. The
top of the inversion was near 1400 feet with a temperature around
27 degrees celsius.

Plenty of high clouds across the region overnight, so any stratus
that develops will likely be disorganized and patchy in nature.

Best chance of CIGS will be across coastal sections of l.A.

County, where generally ifr conds are expected, and across
southern portions of the central coast and the santa ynez valley,
where lifr to vlifr conds may form with some dense fog.

Klax... Low to moderate confidence in the taf. There is a 40-45%
chance thatVFR conditions will prevail overnight.

Kbur... High confidence in the 06z TAF withVFR conds expected
thru the period.

Marine 21 801 pm.

Moderate confidence on fog forecast. Patchy dense fog with
visibility 1 nautical mile or less will likely through at least
Sunday, and possibly into Monday. It is too difficult however to
predict exactly where those patches will be and when.

A mix of occasional short period seas and low-end small craft
advisory winds will linger through at least tonight, and possibly
into Sunday evening across the outer coastal waters. Poorest
marine conditions will likely remain beyond 20 miles offshore
across the outer coastal waters. Winds should diminish after
Sunday evening and remain light through the middle of next week.

Marine conditions should be good, other than local advisory winds
and seas over the outer waters.

Lox watches warnings advisories
Ca... None.

Pz... Small craft advisory in effect until 9 pm pdt Sunday for zone
670. (see laxmwwlox).

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

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

Public... Hall sirard
aviation... Db
marine... Hall
synopsis... Smith
weather.Gov losangeles


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
OHBC1 - 9410660 - Los Angeles, CA 2 mi52 min 58°F1015.1 hPa (+0.8)
AGXC1 4 mi52 min W 1.9 G 2.9 59°F 1015.2 hPa (+0.7)
PFDC1 4 mi52 min NNE 4.1 G 4.1
PXAC1 5 mi52 min ENE 1.9 G 1.9
PSXC1 6 mi52 min ENE 2.9 G 5.1
PFXC1 6 mi52 min E 4.1 G 5.1 62°F
BAXC1 6 mi58 min ENE 4.1 G 6
46222 - San Pedro, CA (092) 6 mi52 min 56°F3 ft
46256 6 mi52 min 57°F5 ft
PRJC1 7 mi52 min SSW 4.1 G 5.1
46253 11 mi52 min 57°F3 ft
46221 - Santa Monica Bay, CA (028) 20 mi52 min 58°F3 ft
ICAC1 - 9410840 - Santa Monica Pier 24 mi52 min ESE 7 G 8 58°F 61°F1015.2 hPa (+0.6)
46262 37 mi52 min 58°F4 ft
46025 - Santa Monica Basin - 33NM West Southwest of Santa Monica, CA 40 mi42 min W 3.9 G 5.8 1014.4 hPa

Wind History for Los Angeles Pier 400, CA
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Torrance, Zamperini Field Airport, CA7 mi4.1 hrsW 810.00 miMostly Cloudy66°F44°F46%1014.2 hPa
Long Beach, Long Beach Airport, CA12 mi59 minS 310.00 miFair63°F53°F70%1015.1 hPa
Los Alamitos Army Airfield, CA15 mi54 minN 010.00 miFair58°F54°F86%1015.5 hPa
Hawthorne, Hawthorne Municipal Airport, CA16 mi59 minSW 310.00 miFair60°F53°F78%1015.1 hPa
Los Angeles, Los Angeles International Airport, CA17 mi59 minS 510.00 miMostly Cloudy60°F53°F78%1014.9 hPa
Fullerton, Fullerton Municipal Airport, CA21 mi59 minS 410.00 miFair64°F53°F68%1014.9 hPa
Avalon Catalina Airport, CA21 mi61 minNW 910.00 miFair70°F30°F23%1014.4 hPa
Los Angeles / USC Campus Downtown, CA22 mi65 minN 010.00 miFair62°F52°F70%1014.7 hPa
John Wayne-Orange County Airport, CA23 mi59 minSSW 410.00 miMostly Cloudy60°F55°F84%1015.2 hPa
Santa Monica, Santa Monica Municipal Airport, CA24 mi61 minESE 310.00 miFair58°F53°F84%1015 hPa

Wind History from TOA (wind in knots)
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Last 24hr--------------------CalmCalm--------------W14
G21
--W14W11W8
1 day ago--------------------55533SW5SW5W14W13SW11W11W10W12W7
2 days ago--------------------W12SW33W7W7W11W14W13W13SW16
G24
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Tide / Current Tables for Los Angeles (outer harbor), California
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Los Angeles (outer harbor)
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Sun -- 01:32 AM PDT     Moonset
Sun -- 02:28 AM PDT     4.83 feet High Tide
Sun -- 06:14 AM PDT     Sunrise
Sun -- 10:17 AM PDT     -0.15 feet Low Tide
Sun -- 12:10 PM PDT     Moonrise
Sun -- 02:46 PM PDT     First Quarter
Sun -- 05:36 PM PDT     3.66 feet High Tide
Sun -- 07:29 PM PDT     Sunset
Sun -- 10:13 PM PDT     2.65 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
44.54.84.84.43.72.81.80.80.2-0.1-0.10.41.11.92.73.33.63.63.43.12.82.72.7

Tide / Current Tables for Long Beach, Terminal Island, California
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Long Beach
Click for Map
Sun -- 01:32 AM PDT     Moonset
Sun -- 02:26 AM PDT     4.88 feet High Tide
Sun -- 06:13 AM PDT     Sunrise
Sun -- 10:16 AM PDT     -0.16 feet Low Tide
Sun -- 12:10 PM PDT     Moonrise
Sun -- 02:46 PM PDT     First Quarter
Sun -- 05:37 PM PDT     3.67 feet High Tide
Sun -- 07:29 PM PDT     Sunset
Sun -- 10:13 PM PDT     2.69 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
4.14.64.84.84.43.72.81.80.80.2-0.1-0.10.41.11.92.73.33.63.73.53.12.82.72.8

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 (2,6,7,8)
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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.