Thursday, June22, 2017 L-36.com


Marine Weather and Tides
Rossmoor, 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 5:40AMSunset 8:07PM Thursday June 22, 2017 7:01 AM PDT (14:01 UTC) Moonrise 4:31AMMoonset 6:42PM Illumination 3% 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- 302 Am Pdt Thu Jun 22 2017
Today..Winds variable 10 kt or less...becoming sw 10 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 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 302 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 09z...or 2 am pdt...a 1033 mb high was centered 700 nm northwest of san francisco and a 1002 mb thermal trough was centered over southeast arizona. Areas of dense fog may affect much of the coastal waters through the week.

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 221155
afdlox
area forecast discussion
national weather service los angeles oxnard ca
455 am pdt Thu jun 22 2017

Aviation discussion updated...

Synopsis
An upper level high pressure system will bring well above normal
temperatures to inland areas of southwestern california through
Monday. An upper level trough of low pressure should then move
into the area Tuesday and Wednesday for a cooling trend. Skies
will be mostly clear for the most part during the period except
for some night and morning low clouds and fog for coastal areas.

Short term (tdy-sat)
three fairly similar days in a row slated for southern ca.

Temperatures will be the main point of discussions as the
interior will continue to bake under relentless heat while at the
beaches a stubborn marine layer and moderate sea breeze will keep
max temps there a degree or two below normal. There is a very
linear relationship with MAX temps from the beaches to the vlys.

Lax yesterday was 73... Downtown la was 82 and pasadena was 95.

Today through Saturday a large hot upper high will be centered
over california. 500 mb hgts will be around 593 dm through the
period. Onshore flow to the east will remain constant through the
period but there will be offshore trends from the north and by
Friday morning there will be actual offshore flow.

The marine layer is about 800 feet deep at klax and about 1400
feet deep at vandenberg afb on the central coast. Marine layer
stratus is slowly filling in and by dawn there should be stratus
at all the coasts and the lower coastal vlys. The NAM shows an
increase in onshore flow this afternoon and that would result in
slow to locally no clearing at area beaches but the nam
initialized very poorly and think its solution is not trustable.

Will go with clearing much like Wednesday. There will be similar
clouds Friday morning. On Friday night there will be a north push
which will bring a weak sundowner to the sba south coast as well
as the i-5 corridor. These north winds will likely keep sba south
coast skies clear Friday night... Otherwise look for a similar
stratus pattern.

Heat warnings continue for the la mtns and the antelope vly.

Advisory level heat will continue through the period for the vta
and sba mtns... The santa clarita vly and the cuyama vly. There
will be little change in temps from Wednesday readings today and
Thursday... There might be some warming Friday as the north winds
add a little compressional warming to the mix.

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 12z.

At 0930z at klax... The inversion was around 900 feet. The top of
the inversion was around 3000 feet with a temperature of about 29
degrees celsius.

Overall... Moderate confidence in the tafs for coastal sites and
high confidence for the other sites. Reduced CIGS and vsby at
coastal sites this morning will improve by midday though MVFR
conditions may linger into the afternoon. Conditions at all
coastal locations will likely deteriorate again by late tonight in
a similar fashion as last night. Otherwise and elsewhereVFR
conditions will prevail.

Klax... Moderate confidence in the current taf. Lifr ifr
conditions will waft in and out at klax near daybreak with a
twenty percent chance of vlifr conditions 13z-15z. Conditions
will improve by midday but may linger as MVFR before clearing to
vfr. Conditions will deteriorate again after 23 02z. East winds
greater than 7 knots are not expected.

Kbur... High confidence in the current taf.VFR conditions will
prevail through the forecast period.

Marine 22 200 am.

Widespread dense fog with visibility less than one mile will
likely impact the coastal waters into the weekend though with
improved visibilities each afternoon.

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

A 2-3 foot south swell will last through much of the week and
poses a risk for breaking waves nearshore. This is especially
hazardous due to the dense fog. 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.

Fire weather 21 545 pm.

The prolonged heat wave combined with low humidities and gusty
afternoon onshore winds will continue to bring elevated fire
danger to inland areas into this weekend. Hot and unstable
weather conditions through this weekend will bring a continued
threat of plume dominated fire behavior in areas where there are
lighter winds, especially interior areas where mixing heights of
15,000-20,000 feet will be possible.

The threat of active nighttime burning will continue across the
mountains and foothills through at least Thursday night with
widespread lows in the 70s and poor humidity recoveries. Minimum
humidities are expected to range from 15 to 30 percent coastal
valleys to 3 to 15 interior areas including the mountains, lowest
across the antelope valley and higher elevations through Thursday.

As the upper level ridge of high pressure weakens some Thursday,
there is expected to be a stronger onshore flow with elevated fire
weather conditions continuing into Thursday and Friday for all
interior areas. Critical fire weather conditions are likely
across the los angeles county mountains and the adjacent foothills
of the antelope valley on Thursday, with a red flag warning posted
for this area from 9 am to 9 pm. These areas will likely
experience the strongest onshore winds(especially through the
highway 14 corridor), generally gusting between 25 and 35 mph,
with localized gusts up to 45 mph in the foothills of the antelope
valley near lake palmdale. The winds are expected to spread
across the warning area by mid morning first at higher elevations
and to the rest of the area by early afternoon and continue into
the evening. Minimum humidities during this time will be 3-15
percent with poor overnight recoveries. Similar winds are expected
Friday, however humidities for this area will likely be up 5 to
10 percent save for possibly higher elevations resulting in
elevated to brief critical fire weather conditions. Hot, dry and
locally windy conditions will likely continue into the weekend.

Lox watches warnings advisories
Ca... Heat advisory in effect until 9 pm pdt Sunday for zones
38-52-53-88. (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 from 9 am this morning to 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... Rorke
aviation... Kj
marine... Kj
fire... Munroe gomberg
synopsis... Sirard
weather.Gov losangeles


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
PRJC1 7 mi55 min SSE 6 G 8.9
PFXC1 8 mi49 min SSE 6 G 8 62°F
PSXC1 8 mi55 min SE 4.1 G 6
BAXC1 9 mi55 min SSE 8 G 8.9
46256 9 mi39 min 62°F6 ft
PFDC1 10 mi55 min E 4.1 G 5.1
PXAC1 10 mi55 min ESE 6 G 7
AGXC1 11 mi49 min ESE 4.1 G 4.1 61°F 1008.1 hPa
OHBC1 - 9410660 - Los Angeles, CA 12 mi49 min 63°F1008.2 hPa
46253 16 mi31 min 65°F4 ft
46222 - San Pedro, CA (092) 18 mi72 min 65°F4 ft
ICAC1 - 9410840 - Santa Monica Pier 27 mi49 min Calm G 1 63°F 63°F1008.2 hPa
46221 - Santa Monica Bay, CA (028) 30 mi61 min 64°F4 ft

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 mi63 minN 09.00 miOvercast63°F61°F94%1008.1 hPa
Long Beach, Long Beach Airport, CA5 mi68 minS 36.00 miFog/Mist63°F60°F90%1007.7 hPa
Fullerton, Fullerton Municipal Airport, CA7 mi68 minN 05.00 miFog/Mist65°F62°F90%1007.3 hPa
John Wayne-Orange County Airport, CA13 mi68 minE 37.00 miOvercast63°F62°F97%1007.5 hPa
Hawthorne, Hawthorne Municipal Airport, CA17 mi68 minN 07.00 miOvercast65°F61°F87%1007.6 hPa
Los Angeles / USC Campus Downtown, CA19 mi2.2 hrsN 07.00 miOvercast66°F61°F84%1006.8 hPa
Los Angeles, Los Angeles International Airport, CA20 mi68 minN 02.50 miFog/Mist64°F62°F93%1007.5 hPa

Wind History from SLI (wind in knots)
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Last 24hrCalmS3SW4S7S8SW8SW8SW10SW10S8S9S8S8S9S5S6S6S5S3S5CalmCalmS4Calm
1 day agoCalmCalmS4CalmS5S7S9S8S9S8S7S7SW6W5W6W3CalmS3CalmCalmCalmCalmS3Calm
2 days agoCalmCalmW3S8SW9S8S9S8SW9S9S7S6S5S4NW6W4W3W4CalmW3S3CalmCalmW3

Tide / Current Tables for Los Patos (highway bridge), California
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Los Patos (highway bridge)
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Thu -- 04:04 AM PDT     -0.59 feet Low Tide
Thu -- 04:32 AM PDT     Moonrise
Thu -- 05:42 AM PDT     Sunrise
Thu -- 10:11 AM PDT     3.40 feet High Tide
Thu -- 03:23 PM PDT     0.88 feet Low Tide
Thu -- 06:41 PM PDT     Moonset
Thu -- 08:06 PM PDT     Sunset
Thu -- 09:31 PM PDT     5.77 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
31.70.5-0.3-0.6-0.40.41.42.33.13.43.22.721.30.911.62.63.955.75.75.1

Tide / Current Tables for Long Beach, Inner Harbor, California
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Long Beach
Click for Map
Thu -- 02:58 AM PDT     -0.98 feet Low Tide
Thu -- 04:32 AM PDT     Moonrise
Thu -- 05:42 AM PDT     Sunrise
Thu -- 09:16 AM PDT     3.98 feet High Tide
Thu -- 02:17 PM PDT     1.44 feet Low Tide
Thu -- 06:42 PM PDT     Moonset
Thu -- 08:06 PM PDT     Sunset
Thu -- 08:36 PM PDT     6.65 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
1.80.3-0.7-1-0.60.31.52.63.543.83.32.51.81.51.62.33.34.65.86.56.65.94.6

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

GOES Local Image of Southwest    EDIT
Geos

Wind Forecast for Los Angeles/Oxnard, CA (10,2,3,4)
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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.