Friday, December15, 2017 L-36.com


Marine Weather and Tides
Rancho Palos Verdes, 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 6:49AMSunset 4:47PM Friday December 15, 2017 7:24 PM PST (03:24 UTC) Moonrise 5:24AMMoonset 4:24PM Illumination 5% 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- 207 Pm Pst Fri Dec 15 2017
Tonight..W winds 5 to 10 kt, becoming 10 to 15 kt after midnight. Wind waves 2 ft or less. W swell 2 to 4 ft at 15 seconds. Areas of smoke.
Sat..N winds 5 to 15 kt. Wind waves 2 ft or less. W swell 2 to 4 ft at 15 seconds. Patchy fog in the morning. Areas of smoke.
Sat night..S winds 5 to 10 kt, becoming ne 15 to 20 kt with gusts to 25 kt after midnight. Strongest western portion. Wind waves 1 to 3 ft. W swell 4 to 6 ft at 11 seconds. Areas of smoke in the evening.
Sun..From point mugu to santa Monica and S of palos verdes, ne winds 20 to 25 kt becoming 15 to 20 kt in the afternoon. Elsewhere, ne winds 5 to 10 kt. Combined seas 3 to 5 ft dominant period 13 seconds.
Sun night..N winds 10 to 15 kt, becoming ne 5 to 10 kt after midnight. Wind waves 2 ft or less. W swell 2 to 3 ft at 12 seconds.
Mon..NE winds 5 to 10 kt. Wind waves 2 ft or less. W swell 2 ft.
Mon night..W winds 10 kt in the evening, becoming variable 10 kt or less. Wind waves 2 ft or less. W swell 2 ft.
Tue..NW winds 5 to 10 kt. Wind waves 2 ft or less. W swell 2 ft.
Wed..W winds 10 to 15 kt. Wind waves 1 to 3 ft. W swell 3 to 5 ft.
PZZ600 207 Pm Pst Fri Dec 15 2017
Synopsis for the southern california coast and santa barbara channel including the channel islands national marine sanctuary and national park..At 21z...or 1 pm pst...a 1033 mb high was centered in colorado, and a 1036 mb high was 600 nm W of portland. A weak trough of low pressure was located along the ca coast. Increasing nw flow is expected in the outer and northern waters tonight into the weekend as high pressure builds into the eastern pacific. Gale force winds are expected across the outer waters late tonight through Sat night. Gusty ne winds are likely near shore from ventura to santa Monica Sat night and Sun. Smoke from the thomas fire may locally reduce visibilities down to 2 nm for portions of the coastal waters S of point conception at least through Sat. Patchy dense fog with visibilities 1 nm or less will also be possible tonight in the outer waters.

7 Day Forecast for Marine Location Near Rancho Palos Verdes, CA
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location: 33.7, -118.31     debug


Area Discussion for - Los Angeles/Oxnard, CA
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Fxus66 klox 160111
afdlox
area forecast discussion... Updated
national weather service los angeles oxnard ca
511 pm pst Fri dec 15 2017

Synopsis
Temperatures will cool this weekend as a trough moves through the
region. Northerly winds will return early Saturday morning, and
then shift northeast for another santa ana wind event late
Saturday night and Sunday. Gradual warming early next week with
weaker offshore winds is expected, before another round of winds
may return by Thursday.

Short term (tdy-mon)
a shortwave trough currently moving into oregon will deepen
quickly through Saturday as it digs into southern california. This
will bring cold air and building surface high pressure in oregon
on Saturday, which along with a 100 kt northerly jet aloft, will
fuel northerly winds on Saturday from santa barbara county to the
i-5 corridor. Not expecting these winds to reach wind advisory
strength, but it will be close in some locations, and they will
significantly impact the thomas fire by pushing fire and smoke in
the direction of communities to the south. With the trough over
our region on Saturday, conditions will cool by around 10 degrees
from today and humidities will rise by 10 percent or so. Some
dense fog could impact the immediate central coast tonight, and
maybe the la coasts later tomorrow as a fog bank currently off the
central coast expands southward. There were some concerns for the
potential of showers convection with this trough on Saturday, but
the latest projections keep all the moisture above 25,000 feet.

Being so high and the low levels so dry, rain and convection
chances are pretty much nil.

The trough is expect to move slowly into arizona Saturday night
and Sunday as the surface high shifts into the great basin. The
flow will turn from northerly to northeasterly quickly by Sunday
with ample upper level support. A solidly moderate santa ana wind
event is still on target with wind advisory gusts in the 40 to 55
mph range common over much of los angeles and ventura counties.

With the air mass remaining cold, highs will generally range
between 65 and 75 degrees with the warmest conditions at the
beaches. Overnight lows will also drop, with very cold conditions
over the interior. Any dense fog concerns should blow away with
the wind. Smoke from the thomas fire will likely concentrate of
the santa barbara south coast again.

The trough will move further to the east on Monday with the great
basin high weakening through the day. Offshore flow should relax
by the afternoon, and temperatures should rise overall as the air
mass warms. Any wind advisories should end by Monday afternoon.

Long term (tue-fri)
fairly benign weather is expected Tuesday and Wednesday with the
edge of a ridge to the west keeping us dry and temperatures just
above normal. Winds will be lightly offshore overall on Tuesday,
then swing onshore on Wednesday and could be breezy over the
interior areas. Computer models generally agree on another inside
tracking trough dropping through utah Wednesday night then
retrograde toward the southwest and into northern baja california
by the end of the week. If this solution holds, it looks like we
are in store for another gusty northerly wind event Wednesday
night focused over santa barbara county and the i-5 corridor, with
gusty northeasterly winds Thursday into the weekend. More fire
weather concerns therefore are unfortunately in the cards. No
whisper of a rain chance through Saturday december 23.

Aviation 16 0110z.

At 23z, the was a marine layer depth around 250 ft deep at klax.

The top of the marine inversion was around 750 ft with a
temperature of 21 degrees celsius. There was other inversions
above the marine inversion.

There is a chance of MVFR conditions in smoke at coastal and
valley terminals and a chance of lifr to ifr conditions in low
clouds and fog. Otherwise,VFR conditions are expected through
the period. Moderate wind-shear and turbulence is possible at
ksba.

Klax... There is a 20 percent chance of MVFR conditions in smoke
between 04z and 10z. There is a 30 percent chance of lifr to ifr
conditions in low clouds and fog between 03z and 14z. Any east
winds will remain less than 7 knots.

Kbur... There is a 20 percent chance of MVFR conditions in smoke
between 04z and 10z.

Marine 15 145 pm.

Across the outer waters, good confidence that NW winds will
increase to small craft advisory (sca) levels this evening, then
to gale force conditions by late tonight. Gale force winds will
continue through late Sat night, then SCA conds will continue into
sun morning. Seas will possibly remain above SCA thresholds for
hazardous seas through Sun afternoon. Another round of SCA winds
will be possible on wed.

Across the inner waters north of point sal, moderate to high
confidence that winds and seas will reach SCA levels from late
tonight and continue through late Sat night. There is a 20-30%
chance that SCA conds will arrive before midnight tonight. Sca
winds will again be possible on wed.

Across the inner waters south of point conception, winds and seas
are expected to be below SCA levels through tue, except for a
70% chance of SCA level NE winds late Sat night and Sun from
ventura to anacapa island south to santa monica, and possibly from
san pedro to catalina island. These winds should create choppy
seas and short period wind waves which could affect avalon and two
harbors. SCA winds will be possible for the east santa barbara
channel on wed.

There will be areas of smoke from the thomas fire over portions
of the coastal waters tonight and sat, mainly from the waters
west of ventura county through the santa barbara channel and over
the outer waters. Visibilities could locally drop to 2 nm or lower
at times today. Patchy dense fog can also be expected tonight for
the outer waters.

Fire weather 15 230 pm.

Red flag warnings in effect from 2 am to 10 pm Saturday for the
santa barbara county mountains and adjacent foothills of the south
coast. The fire weather watch has been upgraded to a red flag
warning over the los angeles and ventura county valleys and
mountains which is in effect for 1 am to 8 pm Sunday. Red flag
warnings have also been issued for the los angeles and ventura
county coasts from 6 am to 8 pm Sunday.

After the passage of an upper level disturbance, there will be
increasing upper level wind support and cold air advection that
will bring strengthening north to northeast winds across the
mountains and adjacent coastal foothills of santa barbara county
(including the thomas fire) late tonight through Saturday evening,
with gusts of 30 to 40 mph being common. Due to the stronger
winds in the upper atmosphere, there is the potential for locally
stronger gusts across exposed ridgetops on Saturday. The
combination of these gusty winds with humidities generally ranging
between 10 to 20 percent will result in critical red flag
conditions across the santa barbara county mountains and adjacent
coastal foothills, mainly east of santa barbara. As a result,
there will be an increased threat of very rapid fire spread, long
range spotting, and extreme fire behavior across the warning
area,including portions of the thomas fire incident. In addition,
there will be increasing northerly winds on Saturday across the
ventura county mountains, especially near the highway 33 and
interstate 5 corridors.

For the remainder of ventura and los angeles counties, the flow
is expected to shift to the northeast by Saturday evening, with a
threat of increased santa ana winds and low humidities late
Saturday night into Sunday when gusts between 35 and 55 mph will
be likely. A red flag warning is in effect for late Saturday night
through Sunday evening for much of los angeles and ventura
counties. An additional santa ana wind event is possible next
Thursday into Friday.

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... High surf advisory in effect until 9 am pst Sunday for zones
34-35. (see laxcfwlox).

Red flag warning in effect from 2 am to 10 pm pst Saturday
for zones 239-252. (see laxrfwlox).

Red flag warning in effect from 6 am to 8 pm pst Sunday for
zones 240-241. (see laxrfwlox).

Red flag warning in effect from 1 am to 8 pm pst Sunday for
zones 244>246-253-254-288-547. (see laxrfwlox).

Pz... Small craft advisory in effect from 3 am Saturday to 3 am pst
Sunday for zone 645. (see laxmwwlox).

Small craft advisory in effect from 9 pm this evening to 3 am
pst Saturday for zones 670-673-676. (see laxmwwlox).

Gale warning in effect from 3 am Saturday to 3 am pst Sunday
for zones 670-673-676. (see laxmwwlox).

Hazard potential outlook (mon-fri)
critical fire weather conditions expected Sunday with gusty
offshore winds and low humidities. Critical fire weather
conditions are possible with gusty sundowner winds Wednesday
night and gusty offshore winds Thursday and Friday.

Public... Kittell
aviation... Hall
marine... Sirard
fire weather... Gomberg
synopsis... B
weather.Gov losangeles


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
OHBC1 - 9410660 - Los Angeles, CA 2 mi54 min 62°F1015.7 hPa
AGXC1 4 mi54 min E 1.9 G 2.9 65°F 1015.7 hPa
PFDC1 4 mi54 min NW 2.9 G 2.9
PXAC1 5 mi54 min NNW 4.1 G 5.1
PSXC1 6 mi54 min NNW 6 G 8
PFXC1 6 mi54 min NW 2.9 G 5.1 65°F
BAXC1 6 mi54 min NNW 8 G 8
46222 - San Pedro, CA (092) 6 mi54 min 62°F3 ft
46256 6 mi62 min 62°F2 ft
PRJC1 7 mi54 min WSW 1 G 2.9
46253 11 mi54 min 63°F3 ft
46221 - Santa Monica Bay, CA (028) 20 mi54 min 63°F4 ft
ICAC1 - 9410840 - Santa Monica Pier 24 mi54 min ESE 2.9 G 4.1 61°F 62°F1015.5 hPa
46262 37 mi54 min 63°F4 ft
46025 - Santa Monica Basin - 33NM West Southwest of Santa Monica, CA 40 mi44 min WNW 5.8 G 7.8 62°F1015.3 hPa

Wind History for Los Angeles Pier 400, CA
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Torrance, Zamperini Field Airport, CA7 mi89 minW 410.00 miA Few Clouds63°F37°F39%1015.6 hPa
Long Beach, Long Beach Airport, CA12 mi31 minN 010.00 miFair63°F37°F38%1015.3 hPa
Los Alamitos Army Airfield, CA15 mi86 minN 510.00 miA Few Clouds61°F35°F38%1015.5 hPa
Hawthorne, Hawthorne Municipal Airport, CA16 mi31 minN 010.00 miFair65°F41°F42%1015.3 hPa
Los Angeles, Los Angeles International Airport, CA17 mi31 minW 410.00 miFair65°F39°F39%1015.2 hPa
Fullerton, Fullerton Municipal Airport, CA21 mi31 minN 010.00 miPartly Cloudy59°F39°F48%1015 hPa
Avalon Catalina Airport, CA21 mi33 minW 710.00 miFair65°F8°F10%1015.1 hPa
Los Angeles / USC Campus Downtown, CA22 mi37 minN 010.00 miFair62°F35°F37%1015 hPa
John Wayne-Orange County Airport, CA23 mi31 minS 310.00 miA Few Clouds63°F37°F38%1015.3 hPa
Santa Monica, Santa Monica Municipal Airport, CA24 mi33 minN 010.00 miOvercast60°F48°F65%1015.2 hPa

Wind History from TOA (wind in knots)
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Last 24hrCalm--------------------S4S4CalmCalmCalmCalmW7W9----NW6W4Calm
1 day agoCalm--------------------CalmCalmCalmCalmCalmW8W8W8W6W7W4CalmCalm
2 days ago4--------------------Calm--NW3CalmCalmW7W5W5W11W5CalmCalmCalm

Tide / Current Tables for Los Angeles (outer harbor), California
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Los Angeles (outer harbor)
Click for Map
Fri -- 12:42 AM PST     1.73 feet Low Tide
Fri -- 04:23 AM PST     Moonrise
Fri -- 06:50 AM PST     Sunrise
Fri -- 07:04 AM PST     5.92 feet High Tide
Fri -- 02:05 PM PST     -0.20 feet Low Tide
Fri -- 03:24 PM PST     Moonset
Fri -- 04:46 PM PST     Sunset
Fri -- 08:20 PM PST     3.85 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
1.81.82.12.83.84.85.65.95.74.93.72.310.1-0.200.71.72.73.53.83.83.32.8

Tide / Current Tables for Long Beach, Terminal Island, California
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Long Beach
Click for Map
Fri -- 12:45 AM PST     1.70 feet Low Tide
Fri -- 04:23 AM PST     Moonrise
Fri -- 06:50 AM PST     Sunrise
Fri -- 07:06 AM PST     5.99 feet High Tide
Fri -- 02:07 PM PST     -0.28 feet Low Tide
Fri -- 03:23 PM PST     Moonset
Fri -- 04:45 PM PST     Sunset
Fri -- 08:23 PM PST     3.89 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
1.81.72.12.83.84.95.665.74.93.72.310.1-0.3-0.10.71.62.73.53.93.83.42.8

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 (22,6,7,8)
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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.