Tuesday, November21, 2017 L-36.com


Marine Weather and Tides
Signal Hill, 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 6:30AMSunset 4:47PM Tuesday November 21, 2017 1:22 PM PST (21:22 UTC) Moonrise 10:06AMMoonset 8:33PM Illumination 10% Phase: Waxing Crescent; Moon at 3 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- 857 Am Pst Tue Nov 21 2017
Today..NW to N winds 5 to 10 kt becoming W in the afternoon. Wind waves 2 ft or less. W swell 2 ft at 12 seconds.
Tonight..W winds 10 kt in the evening, becoming variable 10 kt or less. Wind waves 2 ft or less. W swell 2 ft at 11 seconds.
Wed..Winds variable 10 kt or less, becoming W 10 kt in the afternoon. Wind waves 2 ft or less. W swell 2 ft at 11 seconds.
Wed night..NW winds 10 kt in the evening, becoming variable 10 kt or less. Wind waves 2 ft or less. W swell 2 ft at 10 seconds.
Thu..Winds variable 10 kt or less, becoming W 10 kt in the afternoon. Wind waves 2 ft or less. W swell 2 ft at 14 seconds.
Thu night..NW winds 5 to 10 kt. Wind waves 2 ft or less. W swell 2 ft at 15 seconds.
Fri..Winds variable 10 kt or less, becoming sw 10 kt in the afternoon. Wind waves 2 ft or less. W swell 2 to 3 ft.
Sat..SW winds 5 to 10 kt. Wind waves 2 ft or less. W swell 2 to 3 ft.
PZZ600 857 Am Pst Tue Nov 21 2017
Synopsis for the southern california coast and santa barbara channel including the channel islands national marine sanctuary and national park..At 15z...or 7 am pst...a 1027 mb high was over eastern utah with ridging to a 1018 mb high 300 nm sw of point conception. A 1018 mb low was over ne az with a trough of low pressure extending S into nw mexico. The high will build over the great basin through Wed while a coastal trough develops along the southern ca coast.

7 Day Forecast for Marine Location Near Signal Hill, CA
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location: 33.76, -118.18     debug


Area Discussion for - Los Angeles/Oxnard, CA
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Fxus66 klox 211749
afdlox
area forecast discussion
national weather service los angeles oxnard ca
944 am pst Tue nov 21 2017

Synopsis
A strong ridge of high pressure aloft and weak offshore flow will
likely bring record heat to portions of southwest california at
times through thanksgiving day. The ridge will slowly break down
heading into this weekend supporting a gradual cool down.

Additional cooling and locally gust northerly winds possible early
next week as a weakening cold front pushes through the region.

Short term (tdy-thu)
main weather story over the next few days will be record heat
as a strengthening upper level ridge of high pressure over
southwest california combines with offshore flow near the surface.

A strong 592 dm upper high is currently centered off central
baja this morning with rising heights thicknesses over southwest
california. Meanwhile, lax-daggett gradient has peaked at -6 mb
this morning, which is stronger than models earlier advertised.

As a result of this slightly stronger offshore push, will see
some northeast winds gusting between 25 and 35 mph across the
mountains and valleys of la ventura counties today, with isolated
gusts up to 40 mph across favored mountain areas. Lighter offshore
breezes could also surface across the ventura county coastal
plain during the next few hours. Due to current temperature
trends, stronger offshore gradients, and significant boundary
layer temperature rises noted in the profiler sounding data, have
nudged high temperatures up a few more degrees in some areas for
today in morning update. Official record highs that are
forecasted to be broken today include burbank, woodland hills,
lancaster, paso robles, and sandberg. There will continue to be
some higher level clouds drifting over the area today, but should
have minimal impact on high temperatures.

Even hotter temperatures still on track for Wednesday, when
widespread record heat is forecasted across the region. Many
coastal valley areas expected to climb into the lower to mid
90s on Wednesday. Offshore winds gusting between 30 and 40 mph
expected on Wednesday morning across the mountains and valleys of
la ventura counties.

Elevated fire danger exists for southwest california much of
this week due to the combination of hot temperatures, low
humidities, offshore breezes, and very dry fuels. Brief critical
fire weather conditions will be possible today and Wednesday
across la ventura counties when the offshore winds will be
strongest.

*** from previous discussion ***
the upper high off baja will strengthen a bit and lift northward
tonight and wed. This will cause heights and thicknesses to rise
additionally across the forecast area. Offshore gradients will
increase a bit more by Wed morning. Expect areas of gusty northeast
winds across the mtns and valleys of l.A. Vtu counties, the vtu
county coastal plain, and coastal sections of l.A. County below
passes and canyons from malibu to the hollywood hills, with winds
peaking Wed morning. At this point, it appears that winds, though
probably stronger than today, will remain just below advisory levels.

It will be a warm night in windy areas and in the foothills of
l.A. Vtu counties, with temperatures likely remaining in the 70s
through the night. There will be additional warming at 950 mb on
wed, especially near the coast of l.A. Vtu counties. MAX temps
wed should be up several degrees in coastal areas, with a few
more degrees of warming expected in the valleys. Expect some
record high temperatures coastal and valley areas on wed, with
highs possibly reaching 95 degrees in a couple of locations, more
than 20 degrees above normal for late november.

The upper high will move little Wed night and Thu morning, then
perhaps begin to be nudged southward Thu afternoon as a large
trough moves into the eastern pacific. However, low level
gradients will still be almost 4 mb offshore between klax and
kdag in the morning, then just become nearly neutral in the
afternoon. Temps at 950 mb will change little. There may be some
locally gusty northeast winds Wed night Thu morning, but winds
will be weaker and less widespread. It will be another very warm
night Wed night, then expect another very warm to hot day on thu.

There may be a few degrees of cooling thu, mainly near the coast.

Max temps should still reach or exceed 90 degrees on Thu in the
valleys, and possibly across interior sections of the coastal
plain. The highest temperature ever recorded in downtown los
angeles on thanksgiving day (on which the date varies from year to
year) was 90 degrees on november 26th, 1903.

Long term (fri-mon)
the ec and GFS are in good agreement showing the upper high
weakening some on fri. At the same time, offshore gradients will
weaken, then turn onshore Fri afternoon. There should be several
degrees of cooling on fri, especially west of the mountains, and
especially across the coastal plain. Still, temps should be at
least 10 degrees above normal in many areas.

The upper high will be nudged slowly eastward over the weekend as
a trough approaches the west coast, and heights and thicknesses
will gradually fall. Onshore flow will increase each day. This
will result in a gradual cooling trend over through the weekend,
through MAX temps will probably still be above normal through
Sunday. The trough will move into the west coast Sun night and
mon, and while any rain will likely to stay to the north of the
region, there will be more significant cooling, with temps
possible dropping to below normal levels.

Aviation 21 1740z...

at 1712z, there was a surface-based inversion at klax. The top of
the inversion was 2000 feet with a temperature of 25 degrees
celsius.

High confidence in 18z tafs as weak offshore flow will keep all
sitesVFR through Wed morning.

Klax... High confidence in the 18z TAF withVFR conditions expected
through Wed afternoon.

Kbur... High confidence in the 18z TAF withVFR conditions expected
through Wed morning.

Marine 21 800 am...

for the outer waters, good confidence in current forecast. Winds
and seas are expected to remain below small craft advisory (sca)
levels through Wednesday. On Thursday Friday, there is a 50%
chance of SCA level winds across pzz670 673. Winds will diminish
on Saturday.

For the inner waters, good confidence in current forecast. For the
waters north of point sal, winds and seas are expected to remain
below SCA levels through Saturday although there is a 20% chance
of SCA level winds Thursday afternoon evening. For the waters
south of point conception, winds and seas are expected to remain
below SCA levels through Saturday.

Lox watches warnings advisories
Ca... None.

Pz... None.

Hazard potential outlook (thu-mon)
hot and very dry conditions are expected Thursday, with warm and
dry conditions Wednesday night. There will be gusty winds at times
across portions of los angeles and ventura counties. There will
likely be elevated fire danger across portions of los angeles and
ventura counties during this time.

Public... Gomberg db
aviation... Sirard
marine... Rat sirard
synopsis... Munroe
weather.Gov losangeles


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
PFXC1 2 mi52 min SW 7 G 7 70°F
PRJC1 2 mi52 min WSW 11 G 11
PSXC1 2 mi58 min SSE 4.1 G 5.1
BAXC1 3 mi52 min SSW 2.9 G 2.9
PFDC1 4 mi52 min S 5.1 G 6
46256 4 mi60 min 63°F2 ft
AGXC1 5 mi52 min WSW 9.9 G 13 67°F 1017.2 hPa
OHBC1 - 9410660 - Los Angeles, CA 6 mi52 min 62°F1017.1 hPa
46222 - San Pedro, CA (092) 12 mi52 min 62°F2 ft
46253 13 mi52 min 65°F2 ft
ICAC1 - 9410840 - Santa Monica Pier 24 mi52 min WNW 6 G 7 67°F 61°F1017.6 hPa
46221 - Santa Monica Bay, CA (028) 25 mi52 min 65°F2 ft
46262 44 mi52 min 66°F2 ft
46025 - Santa Monica Basin - 33NM West Southwest of Santa Monica, CA 46 mi42 min W 3.9 G 5.8 65°F1017.1 hPa

Wind History for Los Angeles Pier S, CA
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Long Beach, Long Beach Airport, CA5 mi29 minS 68.00 miFair82°F48°F31%1016.4 hPa
Los Alamitos Army Airfield, CA7 mi26 minS 810.00 miMostly Cloudy79°F48°F34%1016.9 hPa
Torrance, Zamperini Field Airport, CA8 mi95 minWNW 610.00 miPartly Cloudy79°F44°F30%1017.6 hPa
Fullerton, Fullerton Municipal Airport, CA13 mi29 minW 310.00 miFair88°F35°F15%1015.9 hPa
Hawthorne, Hawthorne Municipal Airport, CA14 mi29 minW 1010.00 miFair79°F39°F24%1016.9 hPa
Los Angeles, Los Angeles International Airport, CA17 mi29 minW 1310.00 miMostly Cloudy75°F45°F34%1016.9 hPa
John Wayne-Orange County Airport, CA17 mi29 minSSW 89.00 miMostly Cloudy80°F46°F31%1016.5 hPa
Los Angeles / USC Campus Downtown, CA19 mi35 minN 010.00 miFair84°F41°F22%1016.1 hPa
Santa Monica, Santa Monica Municipal Airport, CA24 mi31 minSW 710.00 miFair76°F37°F25%1017 hPa
El Monte, CA24 mi37 minN 010.00 miFair86°F28°F12%1016.6 hPa

Wind History from LGB (wind in knots)
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Last 24hrS83S5S4CalmE3CalmCalmCalmCalmCalmCalmCalmW3CalmCalmNW3CalmW3N4CalmCalmNW4S6
1 day agoS4S6W9W11W9NW8NE3CalmCalmCalmCalmCalmCalmCalmCalmCalmNW4CalmNW3E3CalmSW4CalmS6
2 days agoNW4NW9NW14NW10NW6NW4CalmCalmCalmCalmN5CalmCalmCalmNW3W3NW3CalmCalmNW3CalmNW344

Tide / Current Tables for Long Beach, Outer Harbor, Pier A, California
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Long Beach
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Tue -- 03:41 AM PST     2.37 feet Low Tide
Tue -- 06:30 AM PST     Sunrise
Tue -- 09:06 AM PST     Moonrise
Tue -- 09:49 AM PST     5.33 feet High Tide
Tue -- 04:46 PM PST     Sunset
Tue -- 05:17 PM PST     0.10 feet Low Tide
Tue -- 07:33 PM PST     Moonset
Tue -- 11:56 PM PST     3.42 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
3.53.12.72.42.42.73.244.75.25.354.33.32.21.20.50.10.20.71.42.22.93.3

Tide / Current Tables for Los Angeles, California
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Los Angeles
Click for Map
Tue -- 03:33 AM PST     2.47 feet Low Tide
Tue -- 06:30 AM PST     Sunrise
Tue -- 09:06 AM PST     Moonrise
Tue -- 09:46 AM PST     5.55 feet High Tide
Tue -- 04:46 PM PST     Sunset
Tue -- 05:09 PM PST     0.11 feet Low Tide
Tue -- 07:33 PM PST     Moonset
Tue -- 11:53 PM PST     3.57 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
3.63.22.82.52.52.83.44.24.95.45.55.24.43.42.21.20.40.10.30.81.62.433.5

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 (16,3,4,5)
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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.