Thursday, January18, 2018 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 6:55AMSunset 5:11PM Wednesday January 17, 2018 9:39 PM PST (05:39 UTC) Moonrise 8:19AMMoonset 6:58PM Illumination 2% Phase: Waxing Crescent; Moon at 1 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- 800 Pm Pst Wed Jan 17 2018
.gale watch in effect from Friday afternoon through Saturday evening...
Tonight..NW winds 10 to 15 kt in the evening becoming 5 to 10 kt after midnight. Wind waves 2 ft or less. W swell 5 to 7 ft at 14 seconds. Patchy fog after midnight.
Thu..Winds variable 10 kt or less, becoming W 10 to 15 kt in the afternoon. Wind waves 2 ft or less. W swell 3 to 5 ft at 16 seconds. Patchy fog in the morning.
Thu night..W winds 10 to 15 kt in the evening, becoming variable 10 kt or less. Wind waves 2 ft or less. W swell 3 to 5 ft at 18 seconds, building to 6 to 8 ft at 17 seconds after midnight.
Fri..Winds variable 10 kt or less, becoming W winds 15 to 25 kt with gusts to 30 kt in the afternoon. Strongest western portion. Combined seas 7 to 9 ft dominant period 16 seconds. Slight chance of showers.
Fri night..Western portion, nw winds 20 to 30 kt with gusts to 35 kt. Elsewhere, nw winds 20 to 25 kt becoming W 10 to 15 kt after midnight. Combined seas 7 to 9 ft dominant period 15 seconds. Slight chance of showers in the evening.
Sat..Western portion, nw winds 20 to 30 kt with gusts to 35 kt. Elsewhere, nw winds 10 to 15 kt. Combined seas 5 to 7 ft dominant period 15 seconds.
Sat night..Western portion, nw winds 25 to 30 kt becoming 5 to 10 kt after midnight. Elsewhere, nw winds 15 to 20 kt becoming 5 to 10 kt after midnight. Combined seas 5 to 7 ft dominant period 14 seconds.
Sun..NW winds 5 to 10 kt. Wind waves 2 ft or less. W swell 3 to 5 ft.
Mon..NW winds 15 to 25 kt. Strongest western portion. Combined seas 5 to 7 ft.
PZZ600 800 Pm Pst Wed Jan 17 2018
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 1024 mb high was located 500 nm sw of point conception and a 964 mb low was 600 nm west of seattle. A large, long period nw swell will affect the waters through tonight. After a brief lull, an even larger nw swell will affect the waters late Thu morning through Sat. Strong nw winds will affect much of the waters Fri through Sat.

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 180410
afdlox
area forecast discussion
national weather service los angeles oxnard ca
810 pm pst Wed jan 17 2018

Synopsis
An incoming weak storm system will bring cooling temperatures...

gusty winds... And light rain and mountain snow showers to the
region by Friday. Snow showers will linger into Saturday morning
for the northern slopes. Conditions return to warm and dry next
week.

Short term (tonight-sat)
weak offshore flow and increased sunshine brought some warming
to the region today. Satellite imagery showing some high clouds
returning to the region tonight, with some low clouds filling
in across the central coast. Still on track for good cooling
trend on Thursday for the central coast, and a few degrees of
cooling for areas south of point conception. Latest 00z NAM model
showing cold upper level low pressure system continuing to
bring a chance of showers to the region from Thursday night into
Friday night, with some snow showers potentially lingering on
the north facing mountain slopes on Saturday morning. For the
montecito area, still estimating less than 0.10 inches with this
system.

The big story with this event will be the low snow levels and
strong winds behind the front Friday afternoon into Saturday
morning. Snow levels could fall to between 2500 and 3500 feet
Friday night into Saturday morning, with the lowest snow levels
on the north facing slopes. Many mountain areas could see between
1 and 3 inches of snow accumulation with this event, with higher
elevation north slopes seeing potentially 3 to 6 inches.

Interstate 5 near the grapevine could see significant travel
impacts from Friday afternoon through Saturday morning, with
potentially 1 to 3 inches of snow accumulation and strong winds
gusting up to 50 mph. Given the ongoing closures of highways 101 and
33 forcing additional vehicle traffic through the grapevine this
could have significant impacts to drivers trying to go north and
south. As we draw closer to the event, winter weather advisories
will likely need to be posted for this event. Also of note, will
likely need several wind advisories for the region Friday
afternoon into Saturday morning. Much cooler temperatures Friday
with highs mostly in the 50s and lower 60s.

*** from previous discussion ***
a cool but mostly dry and breezy day on Saturday with highs again
in the 50s to low 60s at lower elevations and 30s and 40s in the
mountains. Advisory level northwest winds possible along the
central coast, SRN sb county, and the i5 corridor.

Overnight lows will be quite cold, likely dropping to near or below
freezing in many wind protected locations away from the immediate
coast. Frost advisories and or freeze warnings may be needed.

Long term (sun-wed)
temps will continue to slowly rebound Sunday Monday but still
remain cooler than what we've been used to this winter so far but
actually very close to seasonal norms. The tail end of a weak
system will brush northern slo county Monday and there could be
some very light precip there, otherwise just some increasing mid
and high clouds. Dry conditions and slowly warming Tue Wed as
weak offshore flow develops. Forecast highs were trimmed a few
degrees as there doesn't appear to be enough offshore gradient and
ridging aloft to justify temps much warmer than the lower 70s.

Next chance of rain looks to be next Thursday, but again a
glancing blow at best and likely nothing south of pt conception.

Aviation 17 2345z...

at 2309z, there was an inversion around 300 ft deep at klax. The top
of the inversion was near 1100 ft with a temperature of 23 deg c.

Generally hi confidence in the 00z tafs. Low clouds and lifr
cigs vsbys are likely for ksbp and ksmx starting early this evening
and persisting thru Thu morning, with MVFR CIGS expected to continue
thru Thu afternoon. For kprb, there is a 70 percent chance lifr
cigs vsbys will develop at the airfield by 12z and persist thru
about 19z thu, altho the timing of the onset of the lifr conditions
may be up to 2 hours too late. MVFR vsbys will prevail at klax and
klgb at times later tonight into Thu as well. Otherwise,VFR
conditions can be expected at the airfields thru Thu afternoon.

Klax... Generally hi confidence in the 00z taf. MVFR vsbys can be
expected late tonight into Thu morning, and a 60 percent chance MVFR
cigs will move into the airfield starting around 04z Thu evening.

Otherwise,VFR conditions will prevail at the airfield during
the period.

Kbur... Generally hi confidence in the 00z TAF withVFR conditions
expected through Thu afternoon.

Marine 17 800 pm...

for the outer waters, moderate to high confidence in current
forecast. High confidence in small craft advisory (sca) level
conditions due to hazardous seas. Large westerly swell will
gradually diminish this evening into Thursday morning, but an
even larger westerly swell will move into the waters Thursday
afternoon, peaking Thursday night Friday morning (with swell
heights 13-19 feet). SCA level seas will continue through Monday.

As for winds, northwest winds are expected to increase to sca
levels on Thursday and remain at SCA levels through Monday. There
is a 50% chance of gale force winds developing Friday afternoon
through Saturday evening across the southern two zones (pzz673 and
pzz676).

For the inner waters, moderate to high confidence in current
forecast. For the waters north of point sal, high confidence in
small craft advisory (sca) level conditions due to hazardous seas.

Large westerly swell will gradually diminish this evening into
Thursday morning, but an even larger westerly swell will move into
the waters Thursday afternoon, peaking Thursday night Friday
morning (with swell heights 14-17 feet). SCA level seas will
continue through Monday. As for winds, northwest winds are
expected to increase to SCA levels Friday and Saturday. For the
inner waters south of point conception, winds are expected to
increase to SCA levels Friday and Saturday with a 50% chance of
gale force winds developing.

Beaches 17 100 pm..,
an extended period of large surf is expected along west and
northwest-facing beaches through Saturday as westerly swells move
through the coastal waters. The first pulse of large westerly
swell will slowly diminish this evening and Thursday morning.

However, a second, much larger westerly swell will develop
Thursday afternoon and continue through Saturday.

For west and northwest-facing beaches along the central coast,
surf heights of 10-16 feet with local sets to 18 feet will
continue through Thursday morning and a high surf advisory will
remain in effect. By Thursday afternoon, the surf will increase to
15-20 feet with local sets to 25 feet through Saturday afternoon.

Therefore, a high surf warning remains in effect from Thursday
afternoon through 800 pm Saturday evening.

For the west and northwest-facing beaches south of point
conception, surf heights of 7-10 feet with local sets to 12 feet
will slowly diminish late tonight and Thursday morning. However,
surf heights are expected to increase to 8-12 feet with local sets
to 15 feet by Thursday evening and continue into Saturday evening.

A high surf advisory remains in effect through 800 pm Saturday.

Lox watches warnings advisories
Ca... High surf advisory in effect until noon pst Thursday for
zones 34-35. (see laxcfwlox).

High surf warning in effect from noon Thursday to 8 pm pst
Saturday for zones 34-35. (see laxcfwlox).

High surf advisory in effect until 8 pm pst Saturday for
zones 40-41-87. (see laxcfwlox).

Pz... Small craft advisory for hazardous seas in effect until 3 pm
pst Thursday for zones 645-670. (see laxmwwlox).

Gale watch in effect from Friday afternoon through Saturday
evening for zones 650-655-673-676. (see laxmwwlox).

Small craft advisory in effect until 1 pm pst Friday for
zones 673-676. (see laxmwwlox).

Hazard potential outlook (sat-wed)
gusty winds, cold temperatures and accumulating snow to low
elevations, likely including interstate 5 over the grapevine late
Friday into early Saturday. Frost advisories and or freeze
warnings possible for parts of the area over the weekend due to
near or below freezing overnight temperatures.

Public... Gomberg mw
aviation... Sirard
marine... Rat sirard
beaches... Rat
synopsis... Kj
weather.Gov losangeles


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
OHBC1 - 9410660 - Los Angeles, CA 2 mi52 min 62°F1019.7 hPa
AGXC1 4 mi52 min W 1.9 G 1.9 63°F 1019.6 hPa
PFDC1 4 mi52 min W 1.9 G 1.9
PXAC1 5 mi52 min NW 1.9 G 2.9
PSXC1 6 mi52 min NNW 1.9 G 2.9
PFXC1 6 mi52 min NNW 2.9 G 4.1 62°F
BAXC1 6 mi52 min NW 2.9 G 2.9
46222 - San Pedro, CA (092) 6 mi40 min 61°F6 ft
46256 6 mi48 min 61°F5 ft
PRJC1 7 mi52 min NNW 4.1 G 5.1
46253 11 mi40 min 62°F4 ft
46221 - Santa Monica Bay, CA (028) 20 mi40 min 62°F5 ft
ICAC1 - 9410840 - Santa Monica Pier 24 mi58 min E 5.1 G 6 61°F 61°F1019.7 hPa
46262 37 mi40 min 62°F6 ft
46025 - Santa Monica Basin - 33NM West Southwest of Santa Monica, CA 40 mi40 min NW 9.7 G 14 62°F1019 hPa (+0.0)

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 mi1.9 hrsN 010.00 miClear61°F44°F55%0 hPa
Long Beach, Long Beach Airport, CA12 mi47 minWNW 410.00 miFair62°F54°F75%1019.4 hPa
Los Alamitos Army Airfield, CA15 mi1.7 hrsN 07.00 miFair58°F56°F94%1019.3 hPa
Hawthorne, Hawthorne Municipal Airport, CA16 mi47 minN 010.00 miFair61°F55°F84%1019.7 hPa
Los Angeles, Los Angeles International Airport, CA17 mi47 minN 010.00 miFair62°F57°F84%1019.4 hPa
Fullerton, Fullerton Municipal Airport, CA21 mi47 minN 08.00 miFair60°F54°F80%1019 hPa
Avalon Catalina Airport, CA21 mi49 minNNE 510.00 mi64°F36°F35%1019.2 hPa
Los Angeles / USC Campus Downtown, CA22 mi53 minN 010.00 miFair61°F54°F78%1019.3 hPa
John Wayne-Orange County Airport, CA23 mi47 minN 09.00 miFair60°F55°F84%1019.1 hPa
Santa Monica, Santa Monica Municipal Airport, CA24 mi49 minN 010.00 miFair58°F55°F93%1019.5 hPa

Wind History from TOA (wind in knots)
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Last 24hr--------------------33CalmCalmCalmCalmW8W6W9W9W10W5CalmCalm
1 day ago--------------------CalmSE3CalmCalmCalmW4CalmW9W6W7W11W9W8W8
2 days ago--------------------CalmCalm--W4W4W13W11W9W7W10W4W343

Tide / Current Tables for Los Angeles (outer harbor), California
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Los Angeles (outer harbor)
Click for Map
Thu -- 03:07 AM PST     2.05 feet Low Tide
Thu -- 06:56 AM PST     Sunrise
Thu -- 07:58 AM PST     Moonrise
Thu -- 09:16 AM PST     5.72 feet High Tide
Thu -- 04:25 PM PST     -0.54 feet Low Tide
Thu -- 05:10 PM PST     Sunset
Thu -- 06:52 PM PST     Moonset
Thu -- 10:54 PM PST     3.86 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
3.42.82.32.12.22.83.64.55.35.75.64.93.82.41.10.1-0.5-0.40.11.12.13.13.73.9

Tide / Current Tables for Long Beach, Terminal Island, California
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Long Beach
Click for Map
Thu -- 03:09 AM PST     2.06 feet Low Tide
Thu -- 06:56 AM PST     Sunrise
Thu -- 07:58 AM PST     Moonrise
Thu -- 09:17 AM PST     5.88 feet High Tide
Thu -- 04:25 PM PST     -0.59 feet Low Tide
Thu -- 05:10 PM PST     Sunset
Thu -- 06:52 PM PST     Moonset
Thu -- 10:53 PM PST     3.99 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
3.42.92.32.12.22.83.74.65.45.95.753.92.51.10-0.5-0.50.11.12.23.23.84

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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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.