Thursday, July20, 2017 L-36.com


Marine Weather and Tides
Hermosa Beach, 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 5:56AMSunset 8:03PM Thursday July 20, 2017 7:30 PM PDT (02:30 UTC) Moonrise 3:14AMMoonset 5:30PM Illumination 7% 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- 218 Pm Pdt Thu Jul 20 2017
Tonight..W winds 10 to 15 kt...becoming sw 5 to 10 kt after midnight. Wind waves 2 ft or less. Mixed swell W 2 ft at 8 seconds and S 3 ft at 14 seconds. Patchy fog.
Fri..Winds variable 10 kt or less...becoming sw 10 kt in the afternoon. Wind waves 2 ft or less. Mixed swell W 2 ft at 8 seconds and S 2 ft at 12 seconds. Patchy fog in the morning.
Fri night..W winds 10 to 15 kt...becoming sw 5 to 10 kt after midnight. Wind waves 2 ft or less. Mixed swell W 3 ft at 8 seconds and S 2 ft at 16 seconds. Patchy fog.
Sat..Winds variable 10 kt or less...becoming sw 10 kt in the afternoon. Wind waves 2 ft or less. Mixed swell W 2 to 3 ft at 8 seconds and S 2 ft at 15 seconds. Patchy fog in the morning.
Sat night..W winds 10 kt in the evening...becoming variable 10 kt or less. Wind waves 2 ft or less. Mixed swell W 2 ft at 8 seconds and S 2 ft at 14 seconds. Patchy fog.
Sun..Winds variable 10 kt or less...becoming W 10 kt in the afternoon. Wind waves 2 ft or less. Mixed swell W 2 ft at 8 seconds and S 2 ft at 13 seconds. Patchy fog in the morning.
Sun night..W winds 10 kt in the evening...becoming variable 10 kt or less. Wind waves 2 ft or less. W swell 1 to 2 ft at 8 seconds. S swell 1 to 2 ft. Patchy fog after midnight.
Mon..SW winds 5 to 10 kt. Wind waves 2 ft or less. W swell 1 to 2 ft. Patchy fog.
Tue..W winds 5 to 10 kt. Wind waves 2 ft or less. W swell 1 to 2 ft. Patchy fog.
PZZ600 218 Pm Pdt Thu Jul 20 2017
Synopsis for the southern california coast and santa barbara channel including the channel islands national marine sanctuary and national park..At 21z...or 2 pm pdt...a 1026 mb surface high was 600 nm miles nw of point conception and a 1007 mb thermal low was near las vegas. Light to moderate west to northwest flow across the coastal waters will continue through Friday night then gradually weaken through the weekend.

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 202352 aaa
afdlox
area forecast discussion... Updated
national weather service los angeles oxnard ca
452 pm pdt Thu jul 20 2017

Synopsis
The overnight coastal marine layer will spread into the local
valleys, at times, and persist into next week. The dominate high
will bring temperatures around normal this week, with a slight
cooling for next week. A moist monsoonal flow will bring possible
showers and thunderstorms in the afternoons and evenings for the
deserts and mountains on Monday and Tuesday.

Short term (tdy-sun)
12z models are in good synoptic agreement through the period. At
upper levels, elongated ridge will build slightly over the area
through Saturday then weaken a bit on Sunday. Near the surface, a
general weak to moderate onshore flow will prevail with a little
bit of a northerly gradient this evening and again Friday evening.

Forecast-wise, the weekend should be rather quiet and typical of
late july. The main forecast issue will be the coverage of the
marine layer stratus. At this time, will expect the marine
inversion to remain quite shallow through Saturday with possibly a
slight deepening on Sunday. So, stratus fog will likely only
impact the coastal plain through Sunday although some stratus
could slip into the san gabriel valley Sunday morning.

Temperatures will exhibit a modest warming trend through Saturday,
reaching a few degrees above seasonal normals. On Sunday, there
will likely be a couple degrees of cooling on Sunday, but still
remaining a couple degrees above seasonal normals for most areas.

As for winds, do not anticipate any significant issues. The high
resolution models indicate sba-smx bottoming out around -2.5 mb
tonight and Friday night. So, there will be some locally gusty
northerly wind across the south coast of santa barbara county the
next couple of evening, but no widespread advisory-level winds are
anticipated (although the refugio raws will likely be pretty
gusty).

Long term (mon-thu)
overall, 00z models in good synoptic agreement through the period.

At upper levels, center of ridge will meander around the four
corners area. Near the surface, weak onshore flow will continue.

Forecast-wise, main concern for the extended will be the potential
for some monsoonal moisture. At this time, mid-level flow turns
southeast to south which will be favorable for some monsoonal
moisture to move into the area. At this time, the moisture still
looks to be rather high-based, so chances of any significant
thunderstorm activity is minimal. However, there will be a slight
chance (15-20%) of thunderstorms over the mountains and desert
areas in the afternoon evening hours on Monday and Tuesday. If any
thunderstorms do develop, they will likely not produce a lot of
rain due to the forecast moisture profile. So, gusty outflow winds
and dry lightning would be the main potential threats. For
Wednesday and Thursday, the flow turns more southwesterly which
will shunt any moisture to the east, limiting any thunderstorm
chances.

Otherwise, the marine layer will continue to impact the coastal
plain through the period. As for temperatures, expect minor
fluctuations from day-to-day, but still at or slightly above
seasonal normals.

Aviation 20 2350z
at 2313z, the marine inversion at klax was around 800 ft deep. The
top of the inversion was at 3100 ft with a temperature of 25 deg c.

Moderate confidence in the 00z tafs at all coastal airfields except
ksba due to uncertainties in the timing of the low clouds and
lifr ifr MVFR conditions. The low clouds are expected to move into
the airfields from around 04z at ksmx to around 11z at koxr and
kcma. The low clouds should clear toVFR between 16z and 18z fri
then continueVFR thru Fri afternoon. The timing of the onset and
dissipation of the low clouds may be off + - 1 to 2 hours or so.

Otherwise there is generally hi confidence in the 00z tafs at kprb,
ksba, kbur, kvny, kwjf and kpmd withVFR conditions expected thru
fri afternoon, altho there is a 20 percent chance of MVFR cigs
developing at kbur late tonight into early Fri morning. Gusty SW to
w afternoon and evening winds will persist at kwjf and kpmd.

Klax... Moderate confidence overall in the 00z TAF due to
uncertainties in the timing of low clouds and ifr MVFR conditions
later tonight thru Fri morning. The low clouds are expected to move
into the airfield around 08z then clear toVFR around 18z Fri and
continueVFR thru Fri evening. The timing of the onset and
dissipation of the low clouds may be off + - 1 to 2 hours or so.

Kbur... Generally hi confidence in the 00z TAF withVFR conditions
expected thru Fri afternoon, although there is a 20 percent chance
of MVFR CIGS developing late tonight into Fri morning.

Marine 20 300 pm.

High confidence that small craft advisory winds will continue
through at least Saturday and possibly through Sunday across the
outer waters. There is a 20 percent chance of gale force winds
this afternoon and evening, increasing to 30 percent on Friday
afternoon and evening, mainly northwest of the channel islands.

For the nearshore waters north of point conception, small craft
advisory level winds will likely continue through Friday evening.

There is a 40 percent chance that winds could drop below criteria
between 3 am and 9 am pdt Friday, but winds will increase by the
afternoon hours at the latest.

For the inner waters south of point conception, winds and seas
are expected to generally remain below advisory level through the
weekend; however, local winds gusts up to 25 knots could occur in
the vicinity of the channel islands each afternoon and evening
through Friday evening.

Beaches 20 205 pm.

The national hurricane center indicates an 80-90 percent chance
of tropical cyclone formation off the mexican coast by early next
week. A wind-driven swell from one or two tropical cyclones could
develop and bring the potential for strong rip currents and
elevated-to-high surf for southern california beaches for mid-to-
late week next week.

Lox watches warnings advisories
Ca... Beach hazards statement in effect from Friday afternoon
through Sunday evening for zones 40-41-87. (see laxcfwlox).

Pz... Small craft advisory in effect until 9 pm pdt Friday for zone
645. (see laxmwwlox).

Small craft advisory in effect until 9 pm pdt Saturday for
zones 670-676. (see laxmwwlox).

Small craft advisory in effect until 3 am pdt Sunday for zone
673. (see laxmwwlox).

Hazard potential outlook (sun-thu)
no significant hazards are expected during this period.

Public... Thompson
aviation... Sirard
marine... Hall
beaches... Hall
synopsis... Stu
weather.Gov losangeles


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
OHBC1 - 9410660 - Los Angeles, CA 11 mi54 min 70°F1013.3 hPa
PSXC1 11 mi54 min NNW 8 G 9.9
PFXC1 12 mi54 min SW 8 G 8.9 77°F
46221 - Santa Monica Bay, CA (028) 12 mi60 min 72°F4 ft
ICAC1 - 9410840 - Santa Monica Pier 12 mi54 min WSW 13 G 14 68°F 70°F1013.6 hPa
PRJC1 14 mi54 min WSW 16 G 18
46256 15 mi38 min 73°F3 ft
46222 - San Pedro, CA (092) 17 mi60 min 72°F3 ft
46253 22 mi60 min 71°F3 ft
46025 - Santa Monica Basin - 33NM West Southwest of Santa Monica, CA 35 mi40 min W 9.7 G 12 71°F4 ft1013.1 hPa

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 mi43 minWNW 1510.00 miClear72°F62°F73%1013.2 hPa
Los Angeles, Los Angeles International Airport, CA6 mi37 minWSW 1210.00 miA Few Clouds71°F64°F79%1013.3 hPa
Hawthorne, Hawthorne Municipal Airport, CA6 mi37 minW 1010.00 miFair73°F64°F74%1013.5 hPa
Los Angeles / USC Campus Downtown, CA13 mi43 minVar 310.00 miFair76°F60°F58%1012.9 hPa
Long Beach, Long Beach Airport, CA13 mi37 minNW 810.00 miFair77°F63°F62%1013.1 hPa
Santa Monica, Santa Monica Municipal Airport, CA13 mi39 minSW 610.00 miFair72°F64°F76%1013.3 hPa
Los Alamitos Army Airfield, CA19 mi92 minS 810.00 miFair77°F64°F66%1013.1 hPa
Fullerton, Fullerton Municipal Airport, CA22 mi37 minSSW 710.00 miFair78°F64°F64%1012.8 hPa
Burbank - Bob Hope Airport, CA24 mi37 minSSE 810.00 miFair82°F53°F37%1011.9 hPa

Wind History from TOA (wind in knots)
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Last 24hrNW13--------------------CalmCalm--4CalmW6NW10W10NW14NW17W16NW16NW15
1 day agoNW11--------------------W4W3W3NW5NW10W12--NW11--NW16NW14NW15NW13
2 days agoNW10--------------------CalmCalmCalmNW6NW6W10NW10
G20
NW15NW15NW16W17NW15NW12

Tide / Current Tables for King Harbor, Santa Monica Bay, California
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King Harbor
Click for Map
Thu -- 02:03 AM PDT     -0.43 feet Low Tide
Thu -- 03:13 AM PDT     Moonrise
Thu -- 05:57 AM PDT     Sunrise
Thu -- 08:25 AM PDT     3.71 feet High Tide
Thu -- 01:13 PM PDT     1.84 feet Low Tide
Thu -- 05:29 PM PDT     Moonset
Thu -- 07:39 PM PDT     6.43 feet High Tide
Thu -- 08:02 PM PDT     Sunset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
0.8-0.1-0.4-0.20.51.52.53.33.73.63.32.72.11.822.63.54.65.66.36.45.84.73.1

Tide / Current Tables for Los Angeles Harbor, Mormon Island, California
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Los Angeles Harbor
Click for Map
Thu -- 01:59 AM PDT     -0.43 feet Low Tide
Thu -- 03:13 AM PDT     Moonrise
Thu -- 05:56 AM PDT     Sunrise
Thu -- 08:22 AM PDT     3.85 feet High Tide
Thu -- 01:10 PM PDT     1.90 feet Low Tide
Thu -- 05:28 PM PDT     Moonset
Thu -- 07:36 PM PDT     6.62 feet High Tide
Thu -- 08:01 PM PDT     Sunset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
0.7-0.1-0.4-0.10.61.62.63.43.83.83.32.72.21.92.12.73.74.85.96.56.664.83.2

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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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.