Monday, May22, 2017 L-36.com


Marine Weather and Tides
Rossmoor, 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 5:44AMSunset 7:53PM Monday May 22, 2017 10:31 AM PDT (17:31 UTC) Moonrise 3:44AMMoonset 4:29PM Illumination 9% Phase: Waning Crescent; Moon at 27 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- 900 Am Pdt Mon May 22 2017
Today..SW winds 5 to 10 kt...becoming 10 to 20 kt in the afternoon. Wind waves 2 ft or less. Mixed swell W 3 ft at 9 seconds and S 2 ft at 16 seconds. Areas of dense fog with vsby 1 nm or less in the morning.
Tonight..W winds 10 to 20 kt...becoming sw 5 to 10 kt after midnight. Wind waves 2 to 3 ft. Mixed swell W 2 to 3 ft at 9 seconds and S 2 ft at 15 seconds. Patchy fog in the evening, then areas of dense fog with vsby 1 nm or less.
Tue..Winds variable 10 kt or less...becoming W 10 to 20 kt in the afternoon. Wind waves 1 to 3 ft. Mixed swell W 2 to 3 ft at 9 seconds and S 2 ft at 15 seconds. Areas of dense fog with vsby 1 nm or less in the morning.
Tue night..W winds 10 to 20 kt in the evening...becoming variable 10 kt or less. Wind waves 1 to 3 ft. Mixed swell W 2 to 3 ft at 9 seconds and S 2 ft at 14 seconds. Patchy fog.
Wed..Winds variable 10 kt or less...becoming W 10 to 20 kt in the afternoon. Wind waves 1 to 3 ft. Mixed swell W 2 to 3 ft at 9 seconds and S 2 ft at 18 seconds. Patchy fog in the morning.
Wed night..W winds 10 to 20 kt in the evening...becoming variable 10 kt or less. Wind waves 1 to 3 ft. Mixed swell W 2 to 3 ft at 9 seconds and S 2 ft at 18 seconds. Patchy fog in the evening.
Thu..SW winds 10 to 15 kt. Wind waves 2 ft or less. Mixed swell W 2 to 3 ft and S 2 ft.
Fri..SW winds 10 to 15 kt. Wind waves 2 ft or less. Mixed swell W 2 to 3 ft and S 2 ft.
PZZ600 900 Am Pdt Mon May 22 2017
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 1026 mb high was located 300 nm W of portland. A 1009 mb low was centered just south of las vegas.

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 221620
afdlox
area forecast discussion
national weather service los angeles/oxnard ca
920 am pdt Mon may 22 2017

Synopsis
Expect morning coastal stratus with fog and warm temperatures
early week as high pressure remains in control. A migrating low
pressure center will dramatically cool temperatures midweek and
extend morning stratus far inland.

Short term (tdy-wed)
a solid marine lyr has returned, mainly just for coastal areas,
with multiple vortices noted in the visible satellite imagery
spinning off the islands, including two oppositely rotating ones
in the sb channel. However, a clearing trend is already in full
progress and clouds should clear away from most areas by late
morning, though clouds could linger at some beaches north of la
county into the afternoon. The marine lyr along with a 2mb onshore
trend will push cooling into the valleys today, but another couple
degrees of warming expected for the far interior, including the
antelope valley.

***from previous discussion***
for tonight into Tuesday, expect low clouds to push in across
coastal areas and possibly into some coastal valleys. High
confidence that the san gabriel valley will be affected by
stratus. Not much change on Tuesday as high temps should be around
the same, with a degree or two of warming across the antelope
valley. Locations away from the beaches will continue to remain
6-10 degrees above normal on Tuesday. Some gusty winds are
expected across the highway 14 corridor into the antelope valley.

Should remain just under wind advisory thresholds. Local gusts to
45 mph possible around lake palmdale and adjacent foothills.

For Tuesday night into Wednesday, the marine layer will deepen to
allow low clouds to reach all coastal valleys. There could be
locally dense fog across some valley locations. Onshore flow is
expected to reach around + 10 mb Wednesday, which is going to
bring windy conditions to the antelope valley and adjacent
foothills. Wind advisories might be needed for these areas. High
temps across valleys should remain in the mid 70s to lower 80s,
while the antelope valley will be in the lower to mid 90s. Much
cooler across coastal areas. All in all, high temps should be
around normal for this time of year.

One interesting note, both the GFS and nam-wrf are indicating a
very steep lapse rate, high CAPE values and lifted index readings
as low as 7 to 8 over the ventura county mtns, with slightly less
instability over the la county mtns. Looking at the latest model
soundings, there will be limited mid level moisture to tap into
Wednesday afternoon. For now, have added more cloud coverage over
the mountains. But there could be some elevated showers or even
isolated thunderstorm potential, especially over the ventura
county mountains. A couple concerns could be dry lightning and
chaotic downdraft winds if storms initiate then collapse. Will let
later shifts look closer at the moisture aspect. If mid level
moisture increases, then chance would be better for showers or
thunderstorm development.

Long term (thu-sun)
both the GFS and ECMWF models continue to be in good agreement
with large scale features through the extended period. A more
significant cooling trend will occur on Thursday with high temps
across coast and valleys ranging from the mid 60s to the lower
70s, to around 80 in the antelope valley. Models also indicating
the marine layer to deepen quite a bit Friday morning. Added some
patchy drizzle in the san gabriel foothills to match up with the
light rain that san diego NWS office added to areas to the east.

Still quite cool and clouds should linger into the afternoon
hours. Maybe a reverse clearing situation Friday afternoon. As for
winds, strongest southwesterly winds should occur Thursday/Friday
afternoons with the possibility of low-end advisory-level winds
across the mountains and deserts.

An upper ridge is progged to develop over the region Saturday and
Sunday which will start a modest warm up and bring some gusty
northerly winds to the usual wind prone areas including santa
barbara county mtns and adjacent south coast and the la/vtu county
mtns. Possibly needing wind advisories.

Aviation 22/12z.

At 10z at klax the marine layer was 1100 feet deep. The top of
the marine inversion was at 2100 ft with a temperature of 24c.

Widespread low clouds and fog in all coastal areas this morning
with mostly ifr to lifr conditions, and local vlifr conds. Low
clouds and lifr to vlifr conds have also pushed into the santa
ynez valley. Low clouds have also pushed into portions of the
san gabriel valley. Expect clearing by mid morning in the valleys
and by late morning across the coastal plain. Some clouds may
linger at the beaches on the central coast through the afternoon.

The marine layer will deepen a bit tonight. Expect widespread low
clouds in coastal and most valley areas tonight. Conds will
generally be ifr, although should rise into the MVFR category
across coastal sections of l.A. County late at night.

Klax... Moderate confidence in the 12z taf. Expect ifr to lifr
conditions to improveVFR conds during late morning as CIGS scatter
out. There is a 20-30% chance that CIGS will linger through 21z.

Cigs should return this evening in the ifr category. There is a
20-30% chance that CIGS will hold off until at least 06z.

Kbur... High confidence in the 12z TAF thru this evening, withVFR
conds expected. There is a 10% chance of ifr CIGS between 13z and
16z this morning. Expect ifr CIGS to push into the airport late
tonight. There is a 20% chance that skies will remain clear tonight.

Marine 22/900 am
moderate confidence in the forecast. There is a 20-30% chance that
small craft advisories may needed across portions of the outer
waters during the afternoon and evening hours today through wed.

Areas of dense fog with visibilities 1 nm or less will affect most
all coastal waters this morning, and in northern areas late
tonight and Tue morning.

Lox watches/warnings/advisories
Ca... None.

Pz... None.

Hazard potential outlook (wed-sun)
advisory level southwest winds are possible Wednesday through
Friday across the mountains and deserts.

Public... Mw/kaplan
aviation... Db
marine... Sweet
synopsis... Fisher
weather.Gov/losangeles


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
PRJC1 7 mi55 min SE 2.9 G 4.1
PFXC1 8 mi55 min SSE 4.1 G 5.1 59°F
PSXC1 8 mi55 min SSE 5.1 G 8
BAXC1 9 mi55 min SSE 5.1 G 7
46256 9 mi39 min 60°F3 ft
PFDC1 10 mi55 min ESE 2.9 G 2.9
PXAC1 10 mi55 min SE 4.1 G 5.1
AGXC1 11 mi55 min SW 4.1 G 5.1 59°F 1015.6 hPa
OHBC1 - 9410660 - Los Angeles, CA 12 mi55 min 61°F1015.7 hPa
46253 16 mi61 min 63°F3 ft
46222 - San Pedro, CA (092) 18 mi72 min 63°F3 ft
ICAC1 - 9410840 - Santa Monica Pier 27 mi55 min S 2.9 G 4.1 58°F 60°F1015.8 hPa
46221 - Santa Monica Bay, CA (028) 30 mi61 min 61°F3 ft

Wind History for Los Angeles Pier J, CA
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Los Alamitos U. S. Army Airfield, CA1 mi93 minN 03.00 miFog/Mist60°F58°F92%1015.5 hPa
Long Beach, Long Beach Airport, CA5 mi38 minESE 55.00 miPartly Cloudy with Haze67°F57°F71%1015.2 hPa
Fullerton, Fullerton Municipal Airport, CA7 mi38 minN 06.00 miA Few Clouds with Haze70°F59°F68%1014.9 hPa
Santa Ana, John Wayne Airport-Orange County Airport, CA13 mi38 minSSW 39.00 miA Few Clouds66°F57°F75%1015.2 hPa
Torrance, Zamperini Field Airport, CA14 mi44 minN 04.00 miFog/Mist64°F57°F78%1015.6 hPa
Hawthorne, Hawthorne Municipal Airport, CA17 mi38 minVar 49.00 miA Few Clouds65°F57°F76%1015.4 hPa
Los Angeles / USC Campus Downtown, CA19 mi44 minN 05.00 miFair with Haze69°F59°F70%1014.9 hPa
Los Angeles, Los Angeles International Airport, CA20 mi38 minW 54.00 miFog/Mist62°F57°F86%1015.3 hPa
El Monte, CA21 mi46 minS 46.00 miFair with Haze72°F57°F61%1015.9 hPa

Wind History from SLI (wind in knots)
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Last 24hrS5S8S9SW9S9--------------------------------S3Calm3
1 day agoCalmS9SW12SW9W12--------------------------------SW4CalmS4
2 days agoS10SW8SW8SW12SW14W12
G18
--W13------CalmCalmCalmCalmCalmCalmCalmCalm--CalmNE6NE3Calm

Tide / Current Tables for Los Patos (highway bridge), California
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Los Patos (highway bridge)
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Mon -- 02:43 AM PDT     0.39 feet Low Tide
Mon -- 03:44 AM PDT     Moonrise
Mon -- 05:46 AM PDT     Sunrise
Mon -- 08:26 AM PDT     3.45 feet High Tide
Mon -- 02:25 PM PDT     0.39 feet Low Tide
Mon -- 04:28 PM PDT     Moonset
Mon -- 07:51 PM PDT     Sunset
Mon -- 08:38 PM PDT     4.79 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
1.810.50.40.81.52.333.43.432.31.50.80.40.511.9344.74.84.33.5

Tide / Current Tables for Long Beach, Inner Harbor, California
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Long Beach
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Mon -- 01:38 AM PDT     0.54 feet Low Tide
Mon -- 03:44 AM PDT     Moonrise
Mon -- 05:47 AM PDT     Sunrise
Mon -- 07:31 AM PDT     3.99 feet High Tide
Mon -- 01:19 PM PDT     0.63 feet Low Tide
Mon -- 04:29 PM PDT     Moonset
Mon -- 07:43 PM PDT     5.51 feet High Tide
Mon -- 07:52 PM PDT     Sunset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
1.20.60.611.82.73.53.93.93.52.71.81.10.70.81.42.43.64.75.45.5542.7

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 (13,3,4,5)
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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.