Monday, November20, 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 6:29AMSunset 4:48PM Monday November 20, 2017 7:41 AM PST (15:41 UTC) Moonrise 9:16AMMoonset 7:47PM Illumination 4% Phase: Waxing Crescent; Moon at 2 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- 640 Am Pst Mon Nov 20 2017
Today..Winds variable 10 kt or less, becoming W 10 kt in the afternoon. Wind waves 2 ft or less. Mixed swell W 2 ft at 13 seconds and sw 2 ft at 16 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 12 seconds.
Tue..NW winds 5 to 10 kt. Wind waves 2 ft or less. W swell 2 ft at 12 seconds.
Tue night..Winds variable 10 kt or less. Wind waves 2 ft or less. W swell 2 ft at 11 seconds.
Wed..SW winds 5 to 10 kt, becoming nw in the afternoon. Wind waves 2 ft or less. W swell 2 ft at 11 seconds.
Wed night..NW winds 5 to 10 kt. Wind waves 2 ft or less. W swell 2 ft at 10 seconds.
Thu..NW winds 10 to 15 kt. Wind waves 2 ft or less. W swell 2 ft.
Fri..W winds 5 to 10 kt. Wind waves 2 ft or less. W swell 2 to 3 ft.
PZZ600 640 Am Pst Mon Nov 20 2017
Synopsis for the southern california coast and santa barbara channel including the channel islands national marine sanctuary and national park..At 14z...or 6 am pst...a 1032 mb high was located over the four corners and a 1021 mb high was 400 nm sw of point conception. A weak trough was located along the southern ca coast. This pattern will change little through Wed of next week.

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 201226
afdlox
area forecast discussion
national weather service los angeles oxnard ca
426 am pst Mon nov 20 2017

Synopsis
An upper level ridge of high pressure and offshore flow will
bring warm and dry conditions to the area thru this week, with
near record temperatures expected during mid week, including
thanksgiving day. The high will weaken by next weekend, resulting
in increasing onshore flow and cooler temperatures.

Short term (tdy-wed)
flat and dirty ridge across the region this morning, with a fair
amount of high clouds streaming into the forecast area, especially
north of point conception. This will continue through the day, so
skies will generally be partly cloudy, except maybe mostly cloudy
at times north of point conception. Pres gradients from klax to kdag
were still weakly offshore, but not as much so as on Sunday at
this time. 950 mb temps are forecast to edge upward slightly, but
gradient are forecast to turn very weakly onshore this afternoon.

There factors should offset each other to some extent west of the
mountains, so do not expect much change in MAX temps, with slight
warming possible in the valleys. The exception to this may be on
the central coast, where gradients between ksmx and kbfl were a
couple of mb more offshore than at this time on Sunday, and will
remain offshore all day. This, coupled with some low level NE flow
could lead to some warming, especially if there is enough in the
way of unfiltered sunshine.

The ridge will amplify across the region tonight through Wed as a
very strong 592-595 dm upper high off the coast of central baja
drifts northward toward the coast of extreme southwestern ca.

N-s gradients will become increasingly offshore across sba
county tonight, with some gusty north winds expected through and
below passes and canyons of the santa ynez range this evening,
possibly close to advisory levels in a few spots. Low level flow
will turn more northeasterly late tonight Tue morning, and w-e
gradients will become more strongly offshore. Expect some gusty
winds through and below favored passes and canyons of the mtns and
valleys of l.A. And vtu counties on tue, but winds should remain
below advisory levels. Rising heights and thicknesses, increasing
offshore flow, and several degrees of warming at 950 mb should
make for a nice jump in MAX temps on tue, with highs near 90
degrees in the warmer locations in the valleys, and possibly far
interior sections of the coastal plain.

Offshore gradients will increase at bit more Tue night and early
wed, and winds could get close to advisory levels in the mtns and
possibly some foothill locations in l.A. And vtu counties. After a
relatively warm night Tue night, especially where it is breezy to
windy, it will be very warm to hot west of the mountains on wed,
with temps possibly rising to record breaking levels in some
coastal and valley areas. Would not be surprised if a couple of
locations reach 95 degrees on wed, over 20 degrees above normal
for late november.

Long term (thu-sun)
the upper high will begin to be forced eastward on thanksgiving
day as a large trough moves into the eastern pacific. However,
latest computer models show the upper high remaining firmly
entrenched across the region through Thu morning, and low level
gradients remaining offshore. While there may be a few degrees of
cooling, especially near the coast, it will likely be another very
warm to hot day in most coastal and valley areas thu, after a
warm Wed night. MAX temps could still reach or exceed 90 degrees
on thu, possibly even across interior sections of the coastal
plain. The highest temperature ever on thanksgiving day (on which
the date varies from year to year of course) was 90 degrees on
november 26th, 1903.

The upper high will continue to be suppressed southward and will
weaken on Fri as a large trough slowly approaches the west coast.

There will be several degrees of cooling across the entire
region on fri, but still, temps will be at least 10 degrees above
normal in many areas. The cooling trend is expected to continue
through the weekend as heights gradually fall and onshore flow
increases, but temps will likely remain a bit above normal even
through Sunday. Any rain with the approaching trough is likely to
stay to the north of the region.

Aviation 20 1000z...

at 1000z, there was neither any marine layer or marine inversion
at klax.

Overall, high confidence in 12z TAF package as weak offshore flow
will keep all sitesVFR through the period.

Klax... High confidence in 12z taf.

Kbur... High confidence in 12z taf.

Marine 20 130 am...

for the outer waters, good confidence in current forecast. Winds
and seas are expected to remain below SCA levels through
Wednesday, although there is a 30% chance of SCA level gusts this
afternoon evening. For Thursday and Friday, SCA level winds are
likely.

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 Friday. For the waters south of point
conception, winds and seas are expected to remain below SCA levels
through Friday.

Lox watches warnings advisories
Ca... None.

Pz... None.

Hazard potential outlook (wed-sun)
hot and very dry conditions are expected Wednesday and 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... Db
aviation... Rat
marine... Rat
synopsis... Sirard db
weather.Gov losangeles


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
PFXC1 2 mi41 min NE 4.1 G 5.1 56°F
PRJC1 2 mi41 min NNE 4.1 G 5.1
PSXC1 2 mi41 min NE 4.1 G 5.1
BAXC1 3 mi41 min NNE 4.1 G 5.1
PFDC1 4 mi41 min N 1.9 G 2.9
46256 4 mi49 min 61°F2 ft
AGXC1 5 mi41 min N 5.1 G 5.1 56°F 1016.9 hPa (+1.2)
OHBC1 - 9410660 - Los Angeles, CA 6 mi41 min 62°F1017 hPa (+1.3)
46222 - San Pedro, CA (092) 12 mi41 min 60°F3 ft
46253 13 mi41 min 63°F2 ft
ICAC1 - 9410840 - Santa Monica Pier 24 mi41 min NE 1.9 G 2.9 58°F 61°F1017 hPa (+1.8)
46221 - Santa Monica Bay, CA (028) 25 mi41 min 63°F3 ft
46262 44 mi41 min 64°F3 ft
46025 - Santa Monica Basin - 33NM West Southwest of Santa Monica, CA 46 mi31 min NNW 7.8 G 9.7 64°F1016.3 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 mi48 minN 010.00 miFair52°F39°F64%1017 hPa
Los Alamitos Army Airfield, CA7 mi1.7 hrsN 010.00 miFair46°F36°F70%1016.2 hPa
Fullerton, Fullerton Municipal Airport, CA13 mi48 minNW 310.00 miFair51°F39°F64%1016.8 hPa
Hawthorne, Hawthorne Municipal Airport, CA14 mi48 minN 010.00 miFair54°F37°F55%1016.9 hPa
Los Angeles, Los Angeles International Airport, CA17 mi48 minN 010.00 miMostly Cloudy57°F34°F42%1016.7 hPa
John Wayne-Orange County Airport, CA17 mi48 minN 010.00 miMostly Cloudy53°F39°F61%1016.8 hPa
Los Angeles / USC Campus Downtown, CA19 mi54 minN 010.00 miFair51°F37°F59%1016.5 hPa
Santa Monica, Santa Monica Municipal Airport, CA24 mi50 minN 010.00 miFair52°F33°F49%1016.7 hPa

Wind History from LGB (wind in knots)
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Last 24hrCalmNW3CalmNW344S4S6W9W11W9NW8NE3CalmCalmCalmCalmCalmCalmCalmCalmCalmNW4Calm
1 day agoW3N6N3CalmW3CalmNW4NW9NW14NW10NW6NW4CalmCalmCalmCalmN5CalmCalmCalmNW3W3NW3Calm
2 days agoW9NW7NW7W7W6W8W11NW11W10NW6NW5NW6NW3W5CalmSE3E3E3CalmCalmCalmCalmNW3Calm

Tide / Current Tables for Long Beach, Outer Harbor, Pier A, California
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Long Beach
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Mon -- 03:13 AM PST     2.11 feet Low Tide
Mon -- 06:29 AM PST     Sunrise
Mon -- 08:16 AM PST     Moonrise
Mon -- 09:20 AM PST     5.55 feet High Tide
Mon -- 04:38 PM PST     -0.08 feet Low Tide
Mon -- 04:46 PM PST     Sunset
Mon -- 06:47 PM PST     Moonset
Mon -- 11:05 PM PST     3.58 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
3.32.82.42.12.22.73.54.45.15.55.44.93.92.71.50.60-00.41.122.83.43.6

Tide / Current Tables for Los Angeles, California
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Los Angeles
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Mon -- 03:05 AM PST     2.20 feet Low Tide
Mon -- 06:29 AM PST     Sunrise
Mon -- 08:16 AM PST     Moonrise
Mon -- 09:17 AM PST     5.78 feet High Tide
Mon -- 04:30 PM PST     -0.08 feet Low Tide
Mon -- 04:47 PM PST     Sunset
Mon -- 06:47 PM PST     Moonset
Mon -- 11:02 PM PST     3.73 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
3.42.92.42.22.42.93.74.65.45.85.7542.71.50.5-0-00.51.32.233.53.7

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 (10,2,3,4)
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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.