Tuesday, September18, 2018 L-36.com


Marine Weather and Tides
Simi Valley, CA

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Sunrise 6:39AMSunset 6:57PM Tuesday September 18, 2018 2:09 PM PDT (21:09 UTC) Moonrise 3:20PMMoonset 12:49AM Illumination 64% Phase: Waxing Gibbous; Moon at 9 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- 149 Pm Pdt Tue Sep 18 2018
Tonight..W winds 10 to 20 kt. Wind waves 2 to 3 ft. Mixed swell W 2 to 3 ft at 8 seconds and S 2 ft at 15 seconds.
Wed..E winds 5 to 10 kt, becoming W 10 to 15 kt in the afternoon. Wind waves 2 ft or less. W swell 2 ft at 9 seconds.
Wed night..W winds 10 to 15 kt in the evening, becoming variable 10 kt or less. Wind waves 2 ft or less.
Thu..Winds variable 10 kt or less, becoming sw 10 kt in the afternoon. Wind waves 2 ft or less. W swell 1 ft at 10 seconds in the morning.
Thu night..W winds 10 kt in the evening, becoming variable 10 kt or less. Wind waves 2 ft or less. W swell 1 ft at 10 seconds.
Fri..SE winds 5 to 10 kt, becoming sw in the afternoon. Wind waves 2 ft or less. W swell 1 ft at 9 seconds.
Fri night..SW winds 10 kt in the evening, becoming variable 10 kt or less. Wind waves 2 ft or less. W swell 1 ft at 9 seconds.
Sat..W winds 10 to 15 kt. Wind waves 2 ft or less. W swell 2 ft.
Sun..W winds 10 to 15 kt. Wind waves 2 ft or less. W swell 2 ft.
PZZ600 149 Pm Pdt Tue Sep 18 2018
Synopsis for the southern california coast and santa barbara channel including the channel islands national marine sanctuary and national park..At 21z...or 2 pm pdt, a 1026 mb surface high was located about 800 nm west of eureka, california, while a 1002 mb thermal low was along the california-arizona border. This pattern will change little through midweek. Moderate nw winds will affect the outer waters through at least Wednesday night, pushing into the northern near shore waters and the western santa barbara channel during the afternoon and evening.


7 Day Forecast for Marine Location Near Simi Valley, CA
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location: 34.27, -118.8     debug


Area Discussion for - Los Angeles/Oxnard, CA
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Fxus66 klox 181842
afdlox
area forecast discussion
national weather service los angeles oxnard ca
1142 am pdt Tue sep 18 2018

Synopsis 18 1051 am.

Temperatures will be cooler into midweek. Then from Thursday to
Saturday a warm up will occur in offshore flow and as a high builds
in. Fair skies are forecast into Sunday, except for an overnight
coastal marine layer. A low may approach on Monday that will deepen
the marine layer and bring above normal temperatures for next week.

Short term (tdy-thu) 18 954 am.

The upper level trough continues to push towards the forecast area
this morning. The lowering heights and thickness combined with a
very slight increase in onshore flow will result in high temps a
good 3 to 10 degrees cooler vs yesterday's readings, a trend that
has already started based on current observations. Warming trend
kicks in tomorrow after tonight's trough passage and also brings
weak offshore flow by Thursday. Coastal stratus was limited
overnight to the central coast as only a very weak eddy formed
south under a relatively weak inversion. No real change in the
low level flow tonight but local models do bring stratus into at
least the la county coast and possibly up into the ventura coast.

This will be in addition to another round of coastal stratus
poking its way into the santa ynez valley.

Sundowner winds across the western portion of the sba south coast
gusted into the upper 40s last night. No real change in the
situation for later today and tonight, if not slightly favorable
factors for winds at least that strong, so anticipate issuing a
wind advisory this afternoon for the sba south coast and western
santa ynez range.

***from previous discussion***

Long term (fri-mon) 18 316 am.

The ec and the GFS agree that a weak trof will roll through the
area on Friday. This should bring more low clouds to the coastal
areas in the morning. The GFS continues the offshore flow from the
east while the ec has a more typical (for a trof) onshore pattern.

Favored the ec and with low clouds and slightly cooler temps. If
the GFS is correct it will be sunnier and warmer than fcst.

Both mdls bring a ridge to the area on Saturday. The ec has higher
hgts but stronger onshore flow while the GFS has lower hgts and
weaker onshore flow. The ec would bring warming to the interior
and cooling to the coast and the GFS would be the exact opposite.

Continued to favor the ec for this forecast.

Both mdls show little change for Sunday and a persistent forecast
seems to be the best way to go.

A large trof sweeps into the CONUS from british columbia on Monday
and the bottom the trof just brushes eastern ca. It does not look
like it will affect the weather much. The ec is a little warmer
than the GFS and the forecast pretty much splits the difference.

There will be a continued night through morning low cloud regime
across most of the coasts with the vlys remaining clear.

Aviation 18 1841z.

At 1512z, the marine layer depth was around 600 feet deep at
klax. The top of the marine inversion was around 2800 feet with a
temperature near 21 degrees celsius.

Moderate-to-high confidence in the current forecast. Higher
confidence for inland terminals, less confidence for coastal
terminals north of point conception and los angeles county coastal
terminals.VFR conditions are expected throughout the period,
except for a chance of lifr to ifr conditions at coastal
terminals north of point conception and a slight chance of ifr
conditions at los angeles county coastal terminals after 09z.

Klax... There is a 20 percent chance of ifr conditions after 09z.

There is a 20 percent chance of east winds of 7 kt or greater wed
morning.

Kbur...VFR conditions are expected throughout the period. No wind
impacts are expected at this time.

Marine 18 920 am.

Small craft advisory winds and short-period seas will continue
through Wednesday night across the outer coastal waters. There is
a 20 percent chance of gales, especially near point conception,
this afternoon and tonight. Winds will push into the western
santa barbara channel and the near shore waters north of point sal
during the afternoon and evening hours.

Winds will diminish and seas will subside between Wednesday night
and Thursday night, then remain below advisory levels into late
week. There is a 50 percent chance of small craft advisory winds
and short-period seas lingering across the northern waters on
Thursday afternoon and evening.

Lox watches warnings advisories
Ca... None.

Pz... Small craft advisory in effect until 3 am pdt Wednesday for
zones 645-670-673-676. (see laxmwwlox).

Small craft advisory in effect until 9 pm pdt this evening
for zone 650. (see laxmwwlox).

Hazard potential outlook (thu-mon)
No significant hazards expected.

Public... Jackson rorke
aviation... Sweet
marine... Sweet
synopsis... Stu
weather.Gov losangeles


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
ICAC1 - 9410840 - Santa Monica Pier 24 mi39 min W 7 G 8 67°F 71°F1011.4 hPa
46221 - Santa Monica Bay, CA (028) 30 mi39 min 69°F4 ft
46217 - Anacapa Passage, CA (111) 34 mi48 min 66°F3 ft
46025 - Santa Monica Basin - 33NM West Southwest of Santa Monica, CA 38 mi29 min W 7.8 G 9.7 67°F 72°F1011.3 hPa65°F
46262 41 mi39 min 72°F4 ft
PXAC1 45 mi39 min S 6 G 8
BAXC1 46 mi39 min SSW 8 G 9.9
PSXC1 46 mi39 min SSW 8 G 9.9
PFDC1 47 mi39 min S 9.9 G 12
OHBC1 - 9410660 - Los Angeles, CA 47 mi39 min 67°F1011 hPa
NTBC1 - Santa Barbara, CA - 9411340 48 mi93 min SW 5.1 G 6 67°F 1012.3 hPa
AGXC1 48 mi45 min SW 13 G 16 69°F 1011.1 hPa
PFXC1 48 mi39 min SW 12 G 14 73°F
PRJC1 49 mi39 min SW 11 G 12

Wind History for Santa Monica, CA
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Camarillo, Camarillo Airport, CA16 mi14 minW 910.00 miFair76°F54°F47%1011.7 hPa
Van Nuys, Van Nuys Airport, CA17 mi18 minS 910.00 miFair89°F39°F17%1009.4 hPa
Point Mugu, Naval Air Warfare Center, CA20 mi72 minW 1010.00 miA Few Clouds72°F55°F55%1012.1 hPa
Los Angeles, Whiteman Airport, CA21 mi19 minSSE 510.00 miClear84°F37°F19%1011.8 hPa
Oxnard, Oxnard Airport, CA22 mi18 minW 1310.00 miFair72°F57°F61%1011 hPa
Burbank - Bob Hope Airport, CA24 mi16 minS 710.00 miFair85°F43°F23%1009 hPa

Wind History from CMA (wind in knots)
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Last 24hrSW10W9W9W7SW6SW3CalmCalmNE3NE3CalmCalmE3CalmE5NE4NE3NE3Calm3W4W8W9W9
1 day agoW9W8SW7SW5W4CalmCalmCalmCalmW4CalmCalmCalmCalmCalmCalmNE3NE3CalmCalmSW5W6W8W10
2 days agoW8W7W7SW6SW4SW4CalmCalmCalmNE3CalmCalmCalmCalmNE3N3N3CalmCalmCalm3SW9SW8W9

Tide / Current Tables for Mugu Lagoon (ocean pier), 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 Port Hueneme, California
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Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.


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 (17,4,5,8)
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Ground Weather Radar Station Los Angeles, 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.