Thursday, December13, 2018 L-36.com


Marine Weather and Tides
Rossmoor, CA

Version 3.4
What's New / NOTES
10/6/2018 Colors of tide XTide graphs changed to emphasize that they were upgraded. See next note. Comments welcome.
10/4/2018 I have fixed XTide and updated the harmonic files. There were some name changes so you might have to click EDIT to find the new station name.

Sunrise 6:47AMSunset 4:46PM Thursday December 13, 2018 12:28 PM PST (20:28 UTC) Moonrise 12:24PMMoonset 11:36PM Illumination 37% Phase: Waxing Crescent; Moon at 6 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
    EDIT      (on/off)   Help
PZZ655 Inner Waters From Point Mugu To San Mateo Pt. Ca Including Santa Catalina And Anacapa Islands- 902 Am Pst Thu Dec 13 2018
Today..Winds variable 10 kt or less, becoming ne 10 to 15 kt in the afternoon. Wind waves 2 ft or less. W swell 2 to 3 ft at 11 seconds.
Tonight..NE winds 5 to 10 kt, becoming E 10 to 15 kt after midnight. Wind waves 2 ft or less. W swell 2 to 3 ft at 16 seconds.
Fri..E winds 10 to 15 kt in the morning, becoming variable 10 kt or less. Wind waves 2 ft or less. W swell 2 ft at 15 seconds.
Fri night..Winds variable 10 kt or less. Wind waves 2 ft or less. W swell 2 ft at 16 seconds.
Sat..Winds variable 10 kt or less. Wind waves 2 ft or less. W swell 2 to 4 ft at 15 seconds.
Sat night..NW winds 10 kt in the evening, becoming variable 10 kt or less. Wind waves 2 ft or less. W swell 3 to 5 ft at 16 seconds.
Sun..SW winds 5 to 10 kt. Wind waves 2 ft or less. W swell 2 to 4 ft.
Mon..NW winds 10 to 15 kt. Wind waves 1 to 3 ft. W swell 5 to 7 ft. Chance of showers.
PZZ600 902 Am Pst Thu Dec 13 2018
Synopsis for the southern california coast and santa barbara channel including the channel islands national marine sanctuary and national park..At 16z...or 8 am pst, a 1040 mb surface high was over eastern idaho extending a ridge to a 1026 mb high 300 nm W of point conception. Hazardous seas are possible today through Saturday night across the outer and northern coastal waters. Potential for a larger swell to affect coastal waters by large swell by Sunday night into Monday for all coastal waters.


7 Day Forecast for Marine Location Near Rossmoor, CA
   Hourly   EDIT   Help
location: 33.79, -118.07     debug


Area Discussion for - Los Angeles/Oxnard, CA
      (on/off)   Help   NOTE: mouseover dotted underlined text for definition
Fxus66 klox 131821
afdlox
area forecast discussion
national weather service los angeles oxnard ca
1021 am pst Thu dec 13 2018

Synopsis 13 811 am.

High pressure will bring breezy offshore winds and above normal
temperatures to the area today. A weak frontal system is expected
to bring mostly cloudy skies and cooler temperatures on Friday.

A second frontal system may bring a chance of rain Sunday night
into Monday.

Short term (tdy-sat) 13 949 am.

Offshore gradients slightly weaker than the NAM had predicted
yesterday and absent any upper support winds this morning are well
below advisory levels. Will probably see an increase in winds
later this morning but mostly in the 15-25 mph range. Still
expecting a generous warm up today as there's good low level
subsidence in place and a strong upper ridge building over the
west coast. The lax profiler is showing 24 hour temperature
increases ranging from 5-8 degrees below 1500' so the forecast
temps today look on track.

***from previous discussion***
on Friday the ridge weakens and the offshore grads relax. Clouds
will increase through the day as mid and high level clouds stream
out in front of an east pac trof. The central coast will see the
most clouds. There will be 3 to 6 degrees of cooling across the
csts vlys and 1 or 2 degrees of cooling across the interior. These
max temps will still be a few degrees above normal.

The tail end of a weakening cold front will move through Friday
night. Last nights mdls were all dry but then came in wetter for
the 12z through 00z runs. The 06z runs have now switched back to
dry. Way too much variability to pull the pops again and will
continue with the earlier thinking with a slight chc of rain for
coastal slo county. Fast moving zonal flow will quickly replace
the trof on Saturday. Skies will clear out and there will be a few
degrees of warming.

Long term (sun-wed) 13 323 am.

On Sunday the flow will turn to the southwest and hgts will start
to fall as a trof approaches the state from the west. Clouds will
increase as well as mid and high level clouds ahead of the system
begin to move into the area. MAX temps will fall 2 to 4 degree
across the area.

The trof and the front draw closer Sunday night and skies will
turn mostly cloudy everywhere. Both the GFS and the ec agree that
the only chc of rain before midnight will be across the NW corner
of slo county. As the front draws nearer rain will become likely
across the central coast. The clouds, rain, 560 dm hgts and a very
short day will keep most of the temps across the csts and vlys
near 60.

The front will be strong enough to bring rain to the almost all of
the 4 county forecast area during the day Monday before turning to
showers. The GFS continues to be the most bullish mdl but the ec
is not as far behind as it used to be. Right now this looks likes
a quarter inch to half inch sort of systems that will not produce
dangerous rainfall rates.

Monday night and early Tuesday will see a quick transition to
clear skies and offshore flow as a ridge builds into the area. Max
temps will see a huge 5 to 10 degree rebound Tuesday. The ridge
and the offshore flow continues to build on Wednesday and max
temps will see another 4 to 8 degree bump up which will put them
well above normal.

Aviation 13 1820z.

At 1724z, at klax, the marine layer depth was 500 feet. The top
of the inversion was at 900 feet with a temperature near 19
degrees celsius.

High confidence with 18z tafs.VFR conds are expected over the
next 24-hour period.

Klax... High confidence with 18z taf. ExpectVFR conditions
throughout the 30-hour period.

Kbur... High confidence in 18z taf.VFR conditions are expected
throughout the period.

Marine 13 915 am.

Moderate-to-high confidence in the current forecast. A moderately large
northwest swell will gradually build into the coastal waters
today and persist through Saturday night. This swell will
diminish some on Sunday, with hazardous seas developing across
outer and northern coastal waters today through Saturday night.

Between Sunday night and Tuesday, a very large swell is expected
to build into the coastal waters and affect west to northwest
facing harbors, including morro bay. Ventura harbor could also be
affected on Monday through at least Tuesday as some of the energy
from the swell filters into the socal bight.

Beaches 13 952 am.

An extended period of high surf continues to be likely at central
coast beaches through Monday. There is a 50 percent chance of
very large and potentially damaging surf developing over the
upcoming weekend and into early next week. The latest swell models
build a west-northwest swell to between 18-22 feet off the
central california coast with periods between 19 and 20 seconds.

Swell energy could possibly push into southern california bight
between Sunday and Monday.

If swells develop inline with model guidance, surf of 15-20 feet
with sets up to 25 feet will be possible at west and northwest
facing beaches along the central coast between Sunday night and
Tuesday. South of point conception, west facing shores could
potentially see surf between 8-12 feet.

Lox watches warnings advisories
Ca... High surf advisory in effect until 8 pm pst Saturday for
zones 34-35. (see laxcfwlox).

Pz... Small craft advisory for hazardous seas in effect until 9 am
pst Friday for zones 645-670-673-676. (see laxmwwlox).

Hazard potential outlook (sat-wed)
Very high surf and dangerous rip currents are expected Monday and
Tuesday.

Public... Mw rorke
aviation... Sweet
marine... Sweet
beaches... Sweet
synopsis... Stewart
weather.Gov losangeles


Weather Reporting Stations
   EDIT       (on/off)   Help   NOTE: Click on distance to see the station location on a map
Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
PRJC1 7 mi41 min ENE 1 G 1.9
PFXC1 8 mi41 min SSE 2.9 G 4.1 71°F
PSXC1 8 mi41 min NE 4.1 G 5.1
BAXC1 9 mi59 min NE 1.9 G 2.9
46256 9 mi59 min 62°F2 ft
PFDC1 10 mi41 min NNE 4.1 G 4.1
PXAC1 10 mi53 min NNE 2.9 G 4.1
AGXC1 11 mi41 min ESE 5.1 G 5.1 70°F 1022.8 hPa
OHBC1 - 9410660 - Los Angeles, CA 12 mi47 min 62°F1022.7 hPa
46253 16 mi59 min 63°F3 ft
46222 - San Pedro, CA (092) 18 mi59 min 62°F3 ft
ICAC1 - 9410840 - Santa Monica Pier 27 mi47 min NNW 1 G 4.1 71°F 61°F1022.9 hPa
46221 - Santa Monica Bay, CA (028) 30 mi29 min 63°F3 ft

Wind History for Los Angeles Pier J, CA
(wind in knots)    EDIT      (on/off)   Help
1
PM
2
PM
3
PM
4
PM
5
PM
6
PM
7
PM
8
PM
9
PM
10
PM
11
PM
12
AM
1
AM
2
AM
3
AM
4
AM
5
AM
6
AM
7
AM
8
AM
9
AM
10
AM
11
AM
12
PM
Last
24hr
SE10
SE7
SE8
SE7
SE6
E5
E4
E4
E4
NE3
N4
N1
NE2
NE3
NE5
NW5
N3
G7
N6
N5
N4
N3
N6
N2
SE3
1 day
ago
S3
S5
SW7
SW12
SW11
W9
NE4
E6
E5
E6
E2
NE3
NE4
N3
E5
NE4
NE4
NE6
E5
E7
G10
E8
E6
SE8
G11
2 days
ago
SW3
SW4
W7
G10
NW2
SW7
S2
W4
NE2
NE4
E7
E8
SE1
G4
E3
N6
N3
NE9
NE5
E4
E3
E3
S3
SW3

Airport Reports
    EDIT      (on/off)   Help   Click EDIT to display multiple airports
AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Los Alamitos Army Airfield, CA1 mi31 minS 410.00 miFair73°F44°F36%1022.6 hPa
Long Beach, Long Beach Airport, CA5 mi36 minN 010.00 miFair75°F37°F26%1022.2 hPa
Fullerton, Fullerton Municipal Airport, CA7 mi36 minE 710.00 miFair78°F21°F12%1021.7 hPa
John Wayne-Orange County Airport, CA13 mi36 minN 010.00 miFair71°F44°F38%1022.2 hPa
Torrance, Zamperini Field Airport, CA14 mi40 minN 010.00 miClear72°F33°F25%1022.7 hPa
Hawthorne, Hawthorne Municipal Airport, CA17 mi36 minVar 310.00 miFair75°F28°F18%1022.3 hPa
Los Angeles / USC Campus Downtown, CA19 mi42 minE 510.00 miFair74°F28°F19%1022.2 hPa
Los Angeles, Los Angeles International Airport, CA20 mi36 minENE 810.00 miFair75°F28°F18%1022.2 hPa
El Monte, CA21 mi44 minNNE 510.00 miFair72°F30°F22%1023 hPa

Wind History from SLI (wind in knots)
1
PM
2
PM
3
PM
4
PM
5
PM
6
PM
7
PM
8
PM
9
PM
10
PM
11
PM
12
AM
1
AM
2
AM
3
AM
4
AM
5
AM
6
AM
7
AM
8
AM
9
AM
10
AM
11
AM
12
PM
Last 24hrS3S7SW8SW8S3CalmCalmCalmCalmCalmCalmCalmCalmCalmNE4NW3CalmN4CalmCalmCalmCalmW3S4
1 day agoS5SW6SW7SW6S7CalmCalmE3E4SE4E3NE3E4CalmE4E4N3E4E4E6E5E5CalmSE8
2 days agoW4S3S6CalmCalmCalmCalmCalmSE4CalmCalmE5CalmCalmCalmN3E4CalmE3E3CalmCalmCalm4

Tide / Current Tables for Los Patos (highway bridge), California
   EDIT   RT Ports Option   Weekend mode (on/off)   (on/off)   Help   One Week of Data
Los Patos (highway bridge)
Click for Map
Thu -- 03:33 AM PST     3.08 feet High Tide
Thu -- 06:48 AM PST     Sunrise
Thu -- 07:52 AM PST     1.92 feet Low Tide
Thu -- 11:24 AM PST     Moonrise
Thu -- 01:06 PM PST     3.52 feet High Tide
Thu -- 04:44 PM PST     Sunset
Thu -- 09:04 PM PST     0.46 feet Low Tide
Thu -- 10:36 PM PST     Moonset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

12
am
1
am
2
am
3
am
4
am
5
am
6
am
7
am
8
am
9
am
10
am
11
am
12
pm
1
pm
2
pm
3
pm
4
pm
5
pm
6
pm
7
pm
8
pm
9
pm
10
pm
11
pm
1.92.52.93.132.82.421.92.12.42.93.33.53.43.22.72.11.510.60.50.60.9

Tide / Current Tables for Long Beach, Inner Harbor, California
   EDIT      (on/off)   Help   One Week of Data
Long Beach
Click for Map
Thu -- 02:37 AM PST     3.56 feet High Tide
Thu -- 06:45 AM PST     3.08 feet Low Tide
Thu -- 06:49 AM PST     Sunrise
Thu -- 11:25 AM PST     Moonrise
Thu -- 12:10 PM PST     4.07 feet High Tide
Thu -- 04:45 PM PST     Sunset
Thu -- 07:57 PM PST     0.74 feet Low Tide
Thu -- 10:36 PM PST     Moonset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

12
am
1
am
2
am
3
am
4
am
5
am
6
am
7
am
8
am
9
am
10
am
11
am
12
pm
1
pm
2
pm
3
pm
4
pm
5
pm
6
pm
7
pm
8
pm
9
pm
10
pm
11
pm
2.93.33.53.53.43.33.13.13.23.43.73.94.143.73.22.51.91.30.90.70.91.31.9

Weather Map and Satellite Images
       (on/off)   HelpWeather Map
wmap_P
GOES Local Image of Southwest    EDIT
NOTE: East coast views moved to GEOS-16. They are experimental and not well supported by NOAA so they may not be correct so be warned. This change required redoing a large amount of the GOES code. If the image you are expecting is not showing, please let me know. You may need to use the EDIT function to update your location.
Link to Loop

Other links: Northern Pacific     Contential US     Full GOES-East
Wind Forecast for Los Angeles/Oxnard, CA (15,3,4,5)
      (on/off)   Help

Ground Weather Radar Station Santa Ana Mtns, CA
   (on/off)   Help
weather_mapweather_map weather_map

Ad by Google

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.