Monday, December11, 2017 L-36.com


Marine Weather and Tides
Rossmoor, CA

Version 3.4
What's New / NOTES
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.
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 6:45AMSunset 4:45PM Sunday December 10, 2017 9:40 PM PST (05:40 UTC) Moonrise 12:38AMMoonset 1:34PM Illumination 47% Phase: Third Quarter Moon; Moon at 22 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- 824 Pm Pst Sun Dec 10 2017
Tonight..NE winds 10 to 15 kt. Local gusts to 20 kt until midnight. Wind waves 2 ft or less. Mixed swell W 2 to 3 ft at 12 seconds and S 2 ft at 16 seconds.
Mon..NE winds 10 to 15 kt, becoming nw 10 kt in the afternoon. Wind waves 2 ft or less. Mixed swell W 2 to 3 ft at 14 seconds and S 2 ft at 16 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 to 3 ft at 15 seconds and S 2 ft at 16 seconds.
Tue..N winds 5 to 10 kt, except ne winds 10 to 20 kt from point mugu to santa Monica. Wind waves 2 to 3 ft. Mixed swell W 2 to 3 ft at 15 seconds and S 2 ft at 16 seconds.
Tue night..NE winds 5 to 15 kt. Wind waves 2 ft or less. W swell 3 to 4 ft at 15 seconds.
Wed..Winds variable 10 kt or less, becoming N 10 kt in the afternoon. Wind waves 2 ft or less. W swell 3 to 4 ft at 15 seconds.
Wed night..W winds 10 kt in the evening, becoming variable 10 kt or less. Wind waves 2 ft or less. Mixed swell W 2 to 3 ft at 15 seconds and S 2 ft at 16 seconds.
Thu..NW winds 5 to 10 kt. Wind waves 2 ft or less. Mixed swell W 2 to 4 ft and S 2 ft.
Fri..NW winds 5 to 10 kt. Wind waves 2 ft or less. Mixed swell W 2 to 4 ft and S 2 ft.
PZZ600 824 Pm Pst Sun Dec 10 2017
Synopsis for the southern california coast and santa barbara channel including the channel islands national marine sanctuary and national park..At 03z...or 7 pm pst...a 1040 mb surface high was located over idaho with a 1022 mb high over the sw california coastal waters. Mainly weak N to ne flow is expected over the waters through Wed. NW winds will increase over the area Thu into Fri.

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 110429
afdlox
area forecast discussion... Updated
national weather service los angeles oxnard ca
829 pm pst Sun dec 10 2017

Synopsis
Gusty offshore winds, warm afternoon temperatures, and dry
conditions will persist into next week. Smoke from the fires will
impact regional air quality into next week as well.

Short term (tnt-wed)
high pressure aloft continues to cling to the area early this
week as a weak trough of low pressure near 27n and 117w undercuts
the ridge. This trough will continue to move slowly into baja
california and northern mexico through midweek. Upper-level high
pressure over southern oregon will continue to win the battle of
the weather systems, with the easterly flow moving
counterclockwise around the trough serving to keep offshore flow
in place. Any moisture with the trough will stay in mexico and
southern california will remain dry and warm.

Some instability moving across the area today aided in plume
domination for thomas fire, allowing many folks to see the smoke
from miles away. While some weak instability remains tomorrow,
the environment is a little more stable; however by Tuesday,
another vorticity maximum will move over the region. This could
possibly create a more plume-dominated environment for the thomas
fire again on Tuesday. In addition, this vorticity maximum may
also reinforce the offshore pressure gradients and increase santa
ana winds back close to advisory levels.

*** from previous discussion ***

Long term (thu-sun)
not much change thu, then Fri the ridge breaks down as a trough
moves through the pac NW and into the rockies. So expecting a
cooling trend Friday as gradients may actually turn briefly
onshore for the first time in several days, though still 5-10
degrees above normal. Earlier models had indicated more of a
southerly trajectory to the trough that could potentially bring a
more offshore flow over the weekend but today's solutions were
more progressive in moving it east and thus less cold air over the
great basin and weaker offshore flow. So for now looking at a
slight warming trend over the weekend but just light offshore
breezes.

Aviation 10 0006z.

At 00z, there was no marine inversion at klax.

Vfr conditions are expected throughout the period, except for a
chance of MVFR conditions in smoke at coastal and valley
terminals north of kntd. Periods of moderate low-level wind shear
and turbulence are possible ventura county terminals through 08z.

Klax...VFR conditions are expected throughout the period. Any
east winds should remain less than 7 knots.

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

Marine 10 800 pm.

For the inner waters south of point conception, the northeast
winds have subsided below the small craft advisory level, and are
expected to remain below the criteria through the forecast period.

The nearshore waters north of point sal will remain below sca
level through the forecast period.

Elsewhere, winds and seas are expected to remain below small
craft advisory levels through Thursday, and then rise to SCA level
from the northwest on Friday. Before that time, the winds may rise
to near SCA level (10 to 20 knots) at times Monday through
Thursday over the two northern outer zones, pzz673 and 670.

There will be areas of smoke from the thomas fire over portions
of the coastal waters, mainly from the waters west of ventura
county through the santa barbara channel and over the outer
waters. Local visibilities could possibly drop to near one
nautical mile or lower at times.

Fire weather 10 100 pm.

Another critical fire weather day for many areas along with heavy
smoke impacts west of the thomas fire. Red flag warnings were
extended for los angeles and ventura counties through Monday 8 pm
and santa barbara county mountains until 6pm today. Large plume
development and very low humidity was the main reasoning for
extending the warning in sba co. Today.

Wind gusts up to 45 mph have occurred today in the windier canyons
and passes of los angeles and ventura counties with widespread
humidities between 3-12 percent. Expect winds to slowly decrease
tonight, but remain locally gusty when diurnal santa ana's uptick
toward Monday morning. Speeds should be less strong on Monday
(gusts 30-40 mph) with lax-dag pressure gradients near -6mb or
about 1mb weaker than today. Unfortunately there will be a repeat
of poor overnight humidity ranging from 10-25 percent and many
areas returning to less than 10 percent during the day on Monday.

Temperatures will remain well above normal on Monday which could
lead to additional large plume growth over existing fires in a
deep mixing layer. There is a possibility of an extended red flag
in santa barbara county on Monday.

Low daytime humidity and poor overnight recoveries are likely to
persist across the entire fire district through Thursday. Santa
ana wind speeds are predicted to be weaker Monday night into
Tuesday, but there could be local gusts in valleys and mountains
close to red flag warning criteria. Still too early to say red
flags will not be needed then. Long range forecasts show a slight
increase in onshore flow and humidities arriving (hopefully) on
Friday and Saturday. No rain possibilities expected over the next
10 days though.

If fire ignition occurs, very rapid spread and extreme fire
behavior is likely. Those near current wildfires need to stay
aware of and follow official evacuation orders. Everyone needs to
exercise extreme caution when handling any potential fire ignition
sources... Such as campfires, cigarettes, welding and brush
clearing equipment.

Lox watches warnings advisories
Ca... Red flag warning in effect until 8 pm pst Monday for zones
240-241-244>246-253-254-288-547-548. (see laxrfwlox).

Pz... None.

Hazard potential outlook (wed-sun)
critical fire weather conditions and locally gusty offshore winds
could continue into early next week.

Public... Hall mw
aviation... Hall
marine... Smith
fire weather... Boldt
synopsis... Kj
weather.Gov losangeles


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
PRJC1 7 mi40 min E 6 G 9.9
PFXC1 8 mi40 min E 5.1 G 7 70°F
PSXC1 8 mi40 min ESE 8 G 11
BAXC1 9 mi40 min ESE 9.9 G 11
46256 9 mi48 min 60°F3 ft
PFDC1 10 mi40 min ENE 6 G 7
PXAC1 10 mi40 min SW 1.9 G 1.9
AGXC1 11 mi40 min N 4.1 G 5.1 65°F 1020.8 hPa (+1.5)
OHBC1 - 9410660 - Los Angeles, CA 12 mi40 min 62°F1020.9 hPa (+1.6)
46253 16 mi40 min 63°F2 ft
46222 - San Pedro, CA (092) 18 mi40 min 62°F3 ft
ICAC1 - 9410840 - Santa Monica Pier 27 mi40 min NNE 5.1 G 7 74°F 62°F1021 hPa (+1.7)
46221 - Santa Monica Bay, CA (028) 30 mi40 min 63°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 Army Airfield, CA1 mi42 minE 310.00 miFair67°F16°F14%1020.9 hPa
Long Beach, Long Beach Airport, CA5 mi47 minN 010.00 miFair68°F19°F16%1020.6 hPa
Fullerton, Fullerton Municipal Airport, CA7 mi47 minN 010.00 miFair65°F18°F16%1020.5 hPa
John Wayne-Orange County Airport, CA13 mi47 minN 310.00 miOvercast68°F21°F17%1020.5 hPa
Torrance, Zamperini Field Airport, CA14 mi1.8 hrsN 510.00 miMostly Cloudy66°F21°F18%1020.3 hPa
Hawthorne, Hawthorne Municipal Airport, CA17 mi47 minN 010.00 miFair69°F21°F17%1020.7 hPa
Los Angeles / USC Campus Downtown, CA19 mi53 minN 010.00 miFair63°F28°F28%1020.5 hPa
Los Angeles, Los Angeles International Airport, CA20 mi47 minN 010.00 miMostly Cloudy71°F16°F12%1020.6 hPa
El Monte, CA21 mi1.9 hrsN 010.00 miFair61°F39°F45%1020.7 hPa

Wind History from SLI (wind in knots)
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Last 24hrNE6N5N4NE7N3NE7CalmN4N5N4N5N3N5NW7NW6NW7NE11NE10NE10E7E8E7E3E3
1 day agoCalmNW3CalmCalmCalmN4CalmCalmCalmN7N4N5E10
G19
E12NE14NE12E13NE12E8E6E6E4NE8NE7
2 days agoSE5E6W5N5CalmNW3CalmCalmNW3N3CalmCalmNW6NW6NW4NW7S6W8W9NW4CalmNE3CalmCalm

Tide / Current Tables for Los Patos (highway bridge), California
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Los Patos (highway bridge)
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Mon -- 12:38 AM PST     Moonrise
Mon -- 05:41 AM PST     4.21 feet High Tide
Mon -- 06:47 AM PST     Sunrise
Mon -- 12:16 PM PST     0.97 feet Low Tide
Mon -- 01:07 PM PST     Moonset
Mon -- 04:44 PM PST     Sunset
Mon -- 05:37 PM PST     3.20 feet High Tide
Mon -- 11:51 PM PST     0.58 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
0.61.222.93.74.14.23.93.32.51.81.211.11.52.12.73.13.22.92.41.81.10.7

Tide / Current Tables for Long Beach, Inner Harbor, California
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Long Beach
Click for Map
Mon -- 12:38 AM PST     Moonrise
Mon -- 04:47 AM PST     4.88 feet High Tide
Mon -- 06:47 AM PST     Sunrise
Mon -- 11:13 AM PST     1.55 feet Low Tide
Mon -- 01:08 PM PST     Moonset
Mon -- 04:44 PM PST     Sunset
Mon -- 04:46 PM PST     3.70 feet High Tide
Mon -- 10:47 PM PST     0.92 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
1.52.43.44.24.74.94.643.22.41.81.61.72.12.63.23.63.73.42.92.21.510.9

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 (0,6,7,8)
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Ground Weather Radar Station Santa Ana Mtns, CA
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weather_mapweather_map weather_map

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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.