Thursday, January18, 2018 L-36.com


Marine Weather and Tides
Rolling Hills Estates, 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 5:12PM Thursday January 18, 2018 5:22 AM PST (13:22 UTC) Moonrise 8:59AMMoonset 7:52PM Illumination 3% 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- 310 Am Pst Thu Jan 18 2018
.gale watch in effect from Friday afternoon through Saturday evening...
Today..NW winds around 10 kt, 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.
Tonight..W winds 10 to 15 kt. Wind waves 2 ft. W swell 3 to 5 ft at 18 seconds, building to 5 to 7 ft at 17 seconds after midnight.
Fri..W to nw winds 10 to 20 kt, becoming 15 to 25 kt with gusts to 30 kt in the afternoon. Possible frequent gusts to 35 kt western portion in the afternoon. Combined seas 7 to 9 ft dominant period 16 seconds. Slight chance of showers.
Fri night..W to nw winds 20 to 30 kt with possible frequent gusts to 35 kt. Combined seas 8 to 11 ft dominant period 15 seconds. Slight chance of showers in the evening, then chance of showers.
Sat..W to nw winds 20 to 30 kt with possible frequent gusts to 35 kt. Combined seas 7 to 9 ft dominant period 15 seconds.
Sat night..W to nw winds 15 to 25 kt with possible frequent gusts to 35 kt in the evening, becoming 10 to 20 kt. Combined seas 5 to 7 ft dominant period 14 seconds.
Sun..NW winds 10 to 15 kt. Wind waves 2 ft. W swell 4 to 6 ft.
Mon..NW winds 10 to 15 kt. Wind waves 2 ft. W swell 4 to 6 ft.
PZZ600 310 Am Pst Thu Jan 18 2018
Synopsis for the southern california coast and santa barbara channel including the channel islands national marine sanctuary and national park..At 10z...or 2 am pst...a 1024 mb high was located 500 nm sw of point conception. A 964 mb low was located 500 nm west of vancouver. Very large W to nw swell will overspread the water today and persist into the weekend. Strong nw winds will affect much of the waters Fri through Sat.

7 Day Forecast for Marine Location Near Rolling Hills Estates, CA
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location: 33.72, -118.27     debug


Area Discussion for - Los Angeles/Oxnard, CA
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Fxus66 klox 181246
afdlox
area forecast discussion
national weather service los angeles oxnard ca
446 am pst Thu jan 18 2018

Synopsis
A cold and fast moving 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 across the northern slopes. Warmer conditions
return next week, but there is a slight threat of a few showers
across the northern portion of the forecast area early next week.

Short term (tdy-sat)
latest goes-16 satellite imagery indicated plenty of mid to high
level high clouds moving across the region ahead of an approaching
upper trough to the nw. Some patchy low clouds with dense fog were
across portions of the central coast this morning. The upper level
ridge will start to deteriorate later today with weak offshore
flow turning weakly onshore by this afternoon. This will
translate into cooler conditions across much of the forecast area
today. Generally 3-8 degrees cooler for coast and valleys.

Otherwise a few degrees of warming expected across the antelope
valley this afternoon.

Synoptically, a positive tilted upper trough will begin to move
towards california. Clouds will be on the increase today. The
upper trough will then dig further south over southern california
on Friday. Low clouds should deepen for la vtu coast and valleys
with some patchy drizzle will be possible late tonight into early
Friday morning. Models now keep the trough further off the coast
which usually means a better chance to get more precip into the
region. However, wind profiles still keep much of the 850 mb
winds out of the NW with this system. There will be some cyclonic
flow aloft as the front associated with the trough moves into
southern l.A. County Friday. There have been some subtle changes
within the forecast. First, it is quite dynamic in respect to
bringing plenty of cold air behind the front. Also, a 120 kt jet
will approach the forecast area from the SW to NE direction early
Friday evening. The combination of the divergence aloft, mu cape
around 500 j kg near the upper trough and lifted index indicating
some instability moving across the coastal waters will justify
adding a slight chance for thunderstorms over the coastal waters
starting late this afternoon from the north, moving south
overnight. Not much moisture to tap into with this quick moving
system. Generally with NW flow, areas S of point conception will
not see much in the way of precip, especially coastal areas of sba
s. Coast and ventura county coast and valleys.

One item of concern, and it is very low confidence, but there
will be the slightest of chances that a rogue thunderstorm could
move over the montecito area Friday evening with NW steering flow
aloft over the coastal waters when the atmosphere will become
briefly unstable. If a thunderstorm does develop, it will be
quick moving, but could bring brief heavy showers over the recent
debris flow area. Again, not expecting this to occur, but it is
worth mentioning.

Overall, rainfall amounts will be light across much of the
forecast area, with the exception of the northern slopes of the
la vtu county mountains. Snow levels will initially above 7500 ft
Thursday night into early Friday, when the colder air behind the
front will move into the region.

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. A winter weather advisory will be issued later this
morning valid from 10 am Friday through Saturday afternoon for the
la vtu sba county mtns. Also for the foothills of the cuyama
valley in sba county where an inch of snow is expected.

As far as winds go, besides the very windy conditions across the
local mountains, the antelope valley will also experience gusty
cold winds and a dusting of snow will be possible across the
foothills from llano to pearblossom and also around neenach to the
nw at the base of the tehachapi mtns Friday evening into early
Saturday morning. North winds will also filter into the santa
clarita valley, san fernando valley and into w. La late Friday
night into early Saturday morning. A wind advisory will likely be
needed for the antelope valley, and to a lesser extent, the santa
clarita and san fernando valleys.

As far as temps, today will be the last warmer than normal day
for this time of year, then high temps will come crashing down
10-20 degrees across inland areas while coastal areas will be 5-10
degrees cooler by Friday. Highs will range from the upper 50s to
lower 60s for most low-land areas, and much colder in the high
country. Not much change for Saturday as cold air behind the front
will persist. There will be friezing temps across inland areas
fri night and Sat night. Winds will be diminishing some by
Saturday night and the possibility for freeze watches to be issued
for Sat night.

Long term (sun-wed)
temps will continue to slowly rebound Sunday Monday and be fairly
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.

Next chance of rain looks to be next Thursday, but models are not
in agreement with how far south precip will get. Will continue
with light showers across the northern portion of the forecast
area.

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 18 300 am...

for the outer waters, moderate to high confidence in current
forecast. High confidence in small craft advisory (sca) level
conditions through Friday morning due to hazardous seas, with sca
level winds in many areas as well.

Very large NW swell overspread the waters today, and peak tonight
and Fri morning, with combined seas of 15-19 feet. NW winds will
increase fri. There is a 50% chance of gale force winds fri
afternoon thru Sat evening across the southern two zones (pzz673,
pzz676), and a 20% chance of gales across the northern zone (pzz670).

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
through tonight, then winds and seas Fri thru Sat evening. There
is a 20% chance of gale force winds Fri afternoon and Fri night.

Across the sba channel and the southern inner waters, west swell
will build tonight and Friday. There is a 40-50% chance of gale
force winds Fri afternoon thru sat. Gale watches are in effect,
but confidence is not high enough to upgrade to warnings at this
time. There is a good chance that a SCA will be needed as early as
late tonight or Fri morning, due to hazardous seas and or winds.

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 today for zones
34-35. (see laxcfwlox).

High surf warning in effect from noon today to 9 pm pst
Saturday for zones 34-35. (see laxcfwlox).

Winter weather advisory in effect from 10 am Friday to 4 pm
pst Saturday for zones 38-52>54. (see laxwswlox).

Beach hazards statement in effect through Saturday evening
for zone 39. (see laxcfwlox).

High surf advisory in effect until 9 pm pst Saturday for
zones 40-41-87. (see laxcfwlox).

Pz... Small craft advisory in effect until 9 pm pst Saturday 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... Kaplan
aviation... Sirard
marine... Db
beaches... Rat
synopsis... Kaplan
weather.Gov losangeles


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
OHBC1 - 9410660 - Los Angeles, CA 0 mi52 min 62°F1018.2 hPa
AGXC1 1 mi52 min NW 1 G 1 59°F 1018.1 hPa
PFDC1 2 mi52 min WNW 2.9 G 2.9
PFXC1 3 mi52 min N 2.9 G 4.1 59°F
PXAC1 3 mi58 min WNW 1.9 G 1.9
PSXC1 4 mi52 min NNW 2.9 G 2.9
BAXC1 4 mi52 min NNW 5.1 G 5.1
46256 4 mi60 min 61°F4 ft
PRJC1 5 mi52 min E 5.1 G 5.1
46222 - San Pedro, CA (092) 7 mi52 min 61°F5 ft
46253 11 mi52 min 62°F4 ft
46221 - Santa Monica Bay, CA (028) 21 mi52 min 62°F5 ft
ICAC1 - 9410840 - Santa Monica Pier 23 mi52 min NNW 1.9 G 2.9 60°F 61°F1018.4 hPa
46262 39 mi52 min 62°F5 ft
46025 - Santa Monica Basin - 33NM West Southwest of Santa Monica, CA 42 mi42 min NW 7.8 G 9.7 62°F1017.5 hPa

Wind History for Angels Gate, CA
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Long Beach, Long Beach Airport, CA10 mi29 minN 08.00 miFair54°F50°F87%1018 hPa
Los Alamitos Army Airfield, CA13 mi84 minN 07.00 miFair50°F49°F98%1018.2 hPa
Hawthorne, Hawthorne Municipal Airport, CA15 mi29 minN 010.00 miFair55°F48°F77%1018.2 hPa
Los Angeles, Los Angeles International Airport, CA17 mi29 minN 010.00 miPartly Cloudy55°F48°F77%1018.1 hPa
Fullerton, Fullerton Municipal Airport, CA19 mi29 minN 07.00 miFair51°F48°F92%1017.9 hPa
Los Angeles / USC Campus Downtown, CA21 mi35 minN 010.00 miFair55°F44°F67%1017.7 hPa
John Wayne-Orange County Airport, CA21 mi29 minNNE 48.00 miFair53°F48°F86%1018 hPa
Santa Monica, Santa Monica Municipal Airport, CA23 mi31 minN 010.00 miFair54°F48°F80%1018.1 hPa
Avalon Catalina Airport, CA23 mi31 minN 010.00 mi65°F37°F37%1017.5 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, California
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Los Angeles
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Thu -- 03:10 AM PST     2.10 feet Low Tide
Thu -- 06:56 AM PST     Sunrise
Thu -- 07:58 AM PST     Moonrise
Thu -- 09:18 AM PST     5.80 feet High Tide
Thu -- 04:26 PM PST     -0.45 feet Low Tide
Thu -- 05:10 PM PST     Sunset
Thu -- 06:52 PM PST     Moonset
Thu -- 10:56 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
3.42.92.42.12.22.83.64.65.45.85.753.92.51.20.2-0.4-0.40.21.12.23.13.73.9

Tide / Current Tables for Los Patos (highway bridge), California
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Los Patos (highway bridge)
Click for Map
Thu -- 04:19 AM PST     1.23 feet Low Tide
Thu -- 06:55 AM PST     Sunrise
Thu -- 07:57 AM PST     Moonrise
Thu -- 10:16 AM PST     4.75 feet High Tide
Thu -- 05:09 PM PST     Sunset
Thu -- 05:37 PM PST     -0.32 feet Low Tide
Thu -- 06:51 PM PST     Moonset
Thu -- 11:54 PM PST     3.20 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
3.12.72.11.61.31.31.82.63.54.34.74.64.13.22.21.10.3-0.2-0.30.10.91.72.53

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 (8,2,3,4)
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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.