Thursday, May25, 2017 L-36.com


Marine Weather and Tides
Hermosa Beach, CA

Version 3.4
What's New / NOTES
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 5:44AMSunset 7:56PM Thursday May 25, 2017 11:10 AM PDT (18:10 UTC) Moonrise 5:56AMMoonset 7:59PM Illumination 0% Phase: New Moon; Moon at 0 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- 903 Am Pdt Thu May 25 2017
Today..SE winds 5 to 10 kt becoming sw 10 to 20 kt in the afternoon. Wind waves 1 to 3 ft. SW swell 1 to 2 ft at 15 seconds.
Tonight..SW winds 10 to 20 kt...becoming 5 to 10 kt after midnight. Wind waves 1 to 3 ft. SW swell 1 to 2 ft at 15 seconds. Isolated showers after midnight.
Fri..Winds variable 10 kt or less...becoming W 10 to 15 kt in the afternoon. Wind waves 2 ft or less. SW swell 1 to 2 ft at 14 seconds. Isolated showers in the morning.
Fri night..W winds 10 to 15 kt in the evening...becoming variable 10 kt or less. Wind waves 2 ft or less. SW swell 1 to 2 ft at 14 seconds.
Sat..NW winds 5 to 10 kt...becoming W 10 to 15 kt in the afternoon. Wind waves 2 ft or less. W swell 2 to 3 ft at 10 seconds.
Sat night..W winds 10 to 15 kt...becoming nw 5 to 10 kt after midnight. Wind waves 2 ft or less. W swell 1 to 2 ft at 9 seconds.
Sun..W winds 10 to 15 kt. Wind waves 2 ft or less. W swell 1 to 2 ft. Patchy fog.
Mon..W winds 10 to 15 kt. Wind waves 2 ft or less. W swell 1 to 2 ft. Patchy fog.
PZZ600 903 Am Pdt Thu May 25 2017
Synopsis for the southern california coast and santa barbara channel including the channel islands national marine sanctuary and national park..At 15z...or 8 am pdt...a 1000 mb low was over southern nevada while a 1028 mb high was centered 500 nm west of seattle. This pattern will change little through Friday, then a 1025 mb high will form quickly 500 nm west of point conception over the weekend as a 1007 mb thermal low settles into southwest arizona.

7 Day Forecast for Marine Location Near Hermosa Beach, CA
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location: 33.85, -118.4     debug


Area Discussion for - Los Angeles/Oxnard, CA
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Fxus66 klox 251630
afdlox
area forecast discussion
national weather service los angeles oxnard ca
930 am pdt Thu may 25 2017

Synopsis
The low will push the marine layer... Possible precipitation and
below normal temperatures farther inland into Saturday. A high will
build in over the weekend to push the marine layer back to the coast
with above normal temperatures for early next week. Another low may
approach near midweek for increasing clouds and cooling trend.

Short term (tdy-sat)
the marine lyr has deepened on schedule, now up to 4500' south of
pt conception and 3500-4000' up north. The only real question now
is has it deepened enough to actually get a reverse clearing
pattern where it clears better at the coast but stays cloudy
inland. Based on the visible satellite imagery this morning it
doesn't appear that we're headed for that situation today, but
tomorrow might prove to be a better setup for that with some
additional deepening expected with the trough and some PVA aloft.

Otherwise, no big changes to the forecast through the middle of
next week as the models have been pretty consistent showing a
ridge developing late in the weekend and another trough for the
middle of next week.

***from previous discussion***
the deep marine layer and a little PVA from the upper trof will
bring a better chance of drizzle to the area tonight. In fact the
pva when combined with the orographic lift provided by the
foothills will bring a chc of light rain to the coastal slopes esp
for the san gabriels.

Friday will be much like today. The onshore flow will be a little
weaker and and the trof will be to the east so there will be a
little better clearing and maybe a little warmer temperatures away
from the coast.

A more typical marine layer pattern sets up for Saturday. There
will be moderate onshore flow and fairly deep marine layer capped
by a weak to moderate inversion. Low clouds will make it into the
vlys but there will be total clearing by mid or late morning. Max
temps will rebound 3 to 6 degree but will still be a few degrees
blo normal.

Long term (sun-wed)
the little ridge that moved into the area Saturday will continue
to grow and will smoosh the marine layer down and mostly out of
the vlys. MAX temps will climb to near normal at the coasts and
above normal inland.

The ridge will exit the area Monday but not so fast that it will
bring any cooling to the area in fact due to the warmer overnight
airmass MAX temps will likely climb a few more degrees across most
areas.

The ec and GFS agree that an upper low will form near SRN ca tue
and Wed but they do not agree on exactly where it will set up. The
ec has the upper low closest to SRN ca and it would produce a
cooler cloudier scenario. The GFS has the upper low a hundred
miles of so south of ksan. If the GFS comes to pass there will be
much less clouds with warmer temps. For this forecast favored the
cooler ec soln.

Aviation 25 0935z...

at 0935z, the marine inversion at klax was based at 3200 feet. The
top of the inversion was 4300 feet with a temperature of 17
degrees celsius.

Overall, moderate confidence in 12z TAF package. There is a 30%
chance that CIGS this afternoon could increase toVFR levels and a
20% chance that CIGS could scatter out across coastal and valley
taf sites. For tonight, high confidence in return of MVFR cigs,
but only moderate confidence in timing.

Klax... Moderate confidence in 12z taf. There is 30% chance that
cigs will increase toVFR levels 20z-02z and a 10% chance that
cigs could dissipate 20z-03z.

Kbur... Moderate confidence in 12z taf. There is 30% chance that
cigs will increase toVFR levels 20z-02z and a 10% chance that
cigs could dissipate 20z-03z.

Marine 25 900 am.

High confidence sub-small craft advisory (sca) conditions through
Friday. Southwest winds up to 20 kt are expected near the coast
from ventura to orange county this afternoon and evening... Which
will create locally choppy seas. Typically gusty northwest winds
should reform over the weekend... With SCA certain from the central
coast to san nicolas island... And short period seas for the santa
barbara channel and santa monica basin. There is a 30 percent
chance for SCA conditions over the western half of the santa
barbara channel on Sunday.

Lox watches warnings advisories
Ca... Wind advisory in effect from 1 pm this afternoon to 9 pm pdt
this evening for zone 37. (see laxnpwlox).

Wind advisory in effect until 9 pm pdt this evening for zone
59. (see laxnpwlox).

Pz... None.

Hazard potential outlook (sat-wed)
no significant hazards expected.

Public... Mw rorke
aviation... Thompson
marine... Kittell
synopsis... Stu
weather.Gov losangeles


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
PXAC1 9 mi52 min SSW 5.1 G 6
BAXC1 10 mi52 min SW 8.9 G 9.9
OHBC1 - 9410660 - Los Angeles, CA 11 mi52 min 58°F1012.4 hPa
PSXC1 11 mi52 min SW 8 G 9.9
PFDC1 12 mi52 min WSW 5.1 G 5.1
PFXC1 12 mi52 min WSW 7 G 8 63°F
46221 - Santa Monica Bay, CA (028) 12 mi70 min 61°F3 ft
ICAC1 - 9410840 - Santa Monica Pier 12 mi52 min WNW 4.1 G 6 61°F 61°F1012.4 hPa
AGXC1 12 mi52 min SW 4.1 G 5.1 61°F 1012.4 hPa
PRJC1 14 mi52 min W 7 G 8.9
46256 15 mi48 min 59°F3 ft
46222 - San Pedro, CA (092) 17 mi81 min 63°F3 ft
46253 22 mi70 min 62°F3 ft
46025 - Santa Monica Basin - 33NM West Southwest of Santa Monica, CA 35 mi30 min WSW 5.8 G 7.8 60°F 62°F1011.9 hPa50°F

Wind History for Los Angeles Berth 161,
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Torrance, Zamperini Field Airport, CA5 mi77 minS 610.00 miOvercast61°F50°F68%0 hPa
Los Angeles, Los Angeles International Airport, CA6 mi17 minSSW 88.00 miOvercast62°F51°F67%1012 hPa
Hawthorne, Hawthorne Municipal Airport, CA6 mi17 minWSW 910.00 miOvercast62°F51°F67%1012.4 hPa
Los Angeles / USC Campus Downtown, CA13 mi23 minN 010.00 miOvercast65°F48°F56%1011.7 hPa
Long Beach, Long Beach Airport, CA13 mi17 minN 010.00 miOvercast64°F46°F54%1012.2 hPa
Santa Monica, Santa Monica Municipal Airport, CA13 mi19 minSSW 710.00 miOvercast62°F51°F67%1012.1 hPa
Los Alamitos U. S. Army Airfield, CA19 mi72 minN 010.00 miOvercast62°F49°F64%1012.1 hPa
Fullerton, Fullerton Municipal Airport, CA22 mi17 minSSW 610.00 miOvercast64°F50°F60%1011.8 hPa
Burbank - Bob Hope Airport, CA24 mi17 minVar 410.00 miOvercast61°F46°F58%1010.8 hPa

Wind History from TOA (wind in knots)
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Last 24hr3NW5NW10NW11NW5W15W13W13W11W8--------------------Calm44S6
1 day agoNW12W16W17
G23
NW15NW11NW11NW16W17NW14NW11--------------------SW6CalmW3Calm
2 days agoN3NW10NW12NW13NW15NW16NW18NW17W16NW12--------------------NW6W6W6W6

Tide / Current Tables for King Harbor, Santa Monica Bay, California
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King Harbor
Click for Map
Thu -- 03:54 AM PDT     -1.26 feet Low Tide
Thu -- 05:46 AM PDT     Sunrise
Thu -- 05:56 AM PDT     Moonrise
Thu -- 10:13 AM PDT     4.20 feet High Tide
Thu -- 12:46 PM PDT     New Moon
Thu -- 03:24 PM PDT     1.15 feet Low Tide
Thu -- 07:55 PM PDT     Sunset
Thu -- 07:58 PM PDT     Moonset
Thu -- 09:40 PM PDT     6.54 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
3.31.60.1-1-1.3-0.80.21.52.83.84.243.42.51.71.21.31.934.45.66.46.55.9

Tide / Current Tables for Los Angeles Harbor, Mormon Island, California
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Los Angeles Harbor
Click for Map
Thu -- 03:50 AM PDT     -1.32 feet Low Tide
Thu -- 05:46 AM PDT     Sunrise
Thu -- 05:55 AM PDT     Moonrise
Thu -- 10:11 AM PDT     4.28 feet High Tide
Thu -- 12:46 PM PDT     New Moon
Thu -- 03:20 PM PDT     1.18 feet Low Tide
Thu -- 07:54 PM PDT     Sunset
Thu -- 07:57 PM PDT     Moonset
Thu -- 09:37 PM PDT     6.62 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
3.31.5-0-1-1.3-0.80.21.62.93.84.34.13.42.51.71.21.323.14.55.76.56.65.9

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 (14,3,4,5)
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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.