Friday, July21, 2017 L-36.com


Marine Weather and Tides
Seal 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 8:01PM Friday July 21, 2017 3:41 PM PDT (22:41 UTC) Moonrise 4:09AMMoonset 6:32PM Illumination 3% Phase: Waning Crescent; Moon at 28 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- 1253 Pm Pdt Fri Jul 21 2017
Tonight..W winds 10 to 15 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.
Sat..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 14 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 to 3 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. Mixed swell W 3 ft at 9 seconds and S 2 ft at 13 seconds. Patchy fog after midnight.
Mon..Winds variable 10 kt or less, becoming W 10 kt in the afternoon. Wind waves 2 ft or less. Mixed swell W 3 ft at 9 seconds and S 2 ft at 12 seconds. Patchy fog in the morning.
Mon night..W winds 10 kt in the evening, becoming variable 10 kt or less. Wind waves 2 ft or less. Mixed swell W 3 ft at 10 seconds and S 2 ft at 12 seconds. Patchy fog after midnight.
Tue..W winds 5 to 10 kt. Wind waves 2 ft or less. Mixed swell W 2 to 3 ft and S 2 ft. Patchy fog.
Wed..W winds 10 to 15 kt. Wind waves 2 ft or less. Mixed swell W 2 to 3 ft and S 2 ft. Patchy fog.
PZZ600 1253 Pm Pdt Fri Jul 21 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...1025 mb surface high pressure was centered 600 nm miles northwest of point conception and a 1007 mb thermal low was located over southern nevada.

7 Day Forecast for Marine Location Near Seal Beach, CA
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location: 33.74, -118.12     debug


Area Discussion for - Los Angeles/Oxnard, CA
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Fxus66 klox 212128
afdlox
area forecast discussion
national weather service los angeles oxnard ca
228 pm pdt Fri jul 21 2017

Synopsis
Onshore flow will continue night through morning low clouds and
fog will continue through the period. High pressure will dominate
through Saturday, then a weak upper trough will bring some modest
cooling. Monsoonal moisture could bring an unstable weather
pattern to mountains and desert early next week.

Short term (tdy-mon)
strong high pressure aloft centered over the plains states will
continue to assert an influence on the weather pattern across the
region through Saturday. Despite model solutions indicating a
slight increase of onshore flow tonight and into Saturday, 500 mb
heights increase by a decameter and 950 mb temperatures warm some.

The air mass will warm into Saturday. The marine layer depth
should thin to around 900 feet or so.

Southerly flow aloft will develop on Sunday as a shortwave trough
of low pressure near 34n and 137w deepens as it approaches the
north coast of california. Model solutions strengthen onshore
pressure gradients, which would suggest a cooling trend; however,
a battle will be staged between a southwest flow aloft onshore
flow regime and a monsoonal flow pattern. Confidence is growing
for a monsoonal flow pattern to win out. The forecast remains
consistent for the current time, but significant changes could be
made for early next week.

Long term (tue-fri)
model solutions are continuing to develop a monsoonal flow regime
for the region between Sunday night and Monday. Nam-wrf solutions
continue to be aggressive relative to GFS solutions in the
possibility of shower and thunderstorm activity spilling over into
the coastal and valley areas. If this trend continues, future
shifts will need to increase pops and add mentions of shower
activity for Monday and Monday night for the coast and valleys.

850-700 mb mixing ratios increase in excess 10 g kg across the
area and nam-wrf precipitable water values increase above 2
inches across portions of the area. A warm, humid and sticky
weather pattern looks to be developing for early next week. Pops
have been increased across the area. Though the forecast averages
out to a slight chance of showers and thunderstorms for the
mountains and desert, the eastern san gabriel mountains and the
eastern portion of the antelope valley (pearblossom, littlerock,
and lake los angeles) have a better chance of showers and
thunderstorms. Stay tuned as this will be a fluid situation for
early next week.

Southwest flow aloft should start to reestablish on Tuesday.

Slight chance pops have been left in the forecast for now as
isolated showers or thunderstorms cannot be ruled out. Certainly,
drier southwest flow aloft could prevail and convective showers
could not develop.

Stronger onshore flow should develop for mid-to-late next week
keeping near-to-slightly above normal temperatures in place across
the region. A persistent marine layer will likely allow for night
through morning low clouds and fog for the coast and possibly the
lower valley areas.

Aviation 21 1545z.

At 1545z, the marine inversion at klax was based near 1700 feet.

The top of the inversion was 3700 feet with a temperature of
22 degrees celsius.

Overall, moderate confidence in 18z TAF package. High confidence
in return of MVFR ifr conditions to coastal sites tonight, but
only moderate confidence in timing.

Klax... Moderate confidence in 18z taf. Timing of return of
stratus fog could be + - 2 hours of current 08z forecast.

Kbur... High confidence in 18z taf.

Marine 21 100 pm.

For the outer waters, good confidence in current forecast. Small
craft advisory (sca) level winds will continue through Saturday
morning then will slowly diminish by Saturday evening. So the sca
may need to be cancelled early. There will be a 30% chance of
some gusts reaching gale force levels this afternoon and evening.

For Sunday through Wednesday, winds and seas are expected to
remain below SCA levels.

For the inner waters, good confidence in current forecast. For the
waters north of point sal, SCA levels are likely this afternoon
and evening then winds and seas will remain below SCA levels
Saturday through Tuesday. For the waters south of point
conception, winds and seas will remain below SCA levels through
Wednesday.

Beaches 21 1245 pm.

A potential exists for significant surf to impact southern
california beaches late next week and into the following week.

Model solutions have been consistent with developing a tropical
cyclone off the mexican coast and pushing it into an area
consistent with higher surf for the region. Model solutions are
consistent in developing swells between 25 and 35 feet off the
baja california coast. Early guidance suggests a moderately long
period swell impacting the southern california coastline as early
as next Friday, building into next weekend.

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

Pz... Small craft advisory in effect until 9 pm pdt this evening
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 (mon-fri)
a monsoonal flow pattern developing on Sunday will transport
subtropical moisture northwest into southern california. Shower
and thunderstorm chances are in the forecast for Monday and
Tuesday, but there is a possibility that shower activity could
spill over into the coastal and valley areas.

Public... Hall
aviation... Thompson
marine... Thompson
beaches... Hall
synopsis... B hall
weather.Gov losangeles


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
PRJC1 4 mi41 min SW 13 G 14
46256 5 mi49 min 74°F3 ft
PFXC1 5 mi41 min SW 14 G 14 74°F
PFDC1 6 mi41 min S 8.9 G 11
PSXC1 6 mi41 min S 6 G 8
BAXC1 7 mi41 min SSW 7 G 9.9
AGXC1 7 mi41 min WSW 13 G 17 71°F 1013.2 hPa (-1.9)
OHBC1 - 9410660 - Los Angeles, CA 8 mi41 min 72°F1013.2 hPa (-2.1)
PXAC1 8 mi41 min N 2.9 G 4.1
46253 12 mi41 min 74°F3 ft
46222 - San Pedro, CA (092) 13 mi41 min 73°F2 ft
ICAC1 - 9410840 - Santa Monica Pier 27 mi41 min W 9.9 G 12 69°F 74°F1013.6 hPa (-1.8)
46221 - Santa Monica Bay, CA (028) 28 mi41 min 73°F3 ft
46025 - Santa Monica Basin - 33NM West Southwest of Santa Monica, CA 49 mi31 min W 9.7 G 12 71°F1013.5 hPa

Wind History for Los Angeles Pier J, CA
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Los Alamitos Army Airfield, CA5 mi1.7 hrsSSW 1110.00 miFair78°F64°F63%1013.8 hPa
Long Beach, Long Beach Airport, CA6 mi48 minS 910.00 miFair79°F63°F58%1012.7 hPa
Fullerton, Fullerton Municipal Airport, CA12 mi48 minSSW 610.00 miFair84°F63°F49%1012.2 hPa
Torrance, Zamperini Field Airport, CA12 mi46 minWNW 1610.00 miClear75°F62°F65%1012.9 hPa
John Wayne-Orange County Airport, CA14 mi48 minSW 810.00 miFair78°F63°F60%1012.8 hPa
Hawthorne, Hawthorne Municipal Airport, CA18 mi48 minW 1010.00 miFair77°F64°F64%1013.1 hPa
Los Angeles, Los Angeles International Airport, CA20 mi48 minW 1210.00 miA Few Clouds76°F64°F69%1013.1 hPa
Los Angeles / USC Campus Downtown, CA21 mi54 minW 510.00 miFair80°F64°F58%1012.5 hPa

Wind History from SLI (wind in knots)
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Last 24hrS10S11S8S8S5S3S3S4S3S3CalmCalmCalmCalmE3CalmNE3E3SW5S5S6SW9
G15
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1 day agoSW12
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SW9S7S5SE4CalmS3SE3S4S3CalmCalmCalmCalmCalmCalmCalmS3S5SW5S8S9SW10SW10
2 days agoSW10S9S7S7S5S5S4S4CalmS3S3S3CalmCalmNW3CalmCalmCalmCalmS8SW10S9S10SW10

Tide / Current Tables for Los Patos (highway bridge), California
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Los Patos (highway bridge)
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Fri -- 03:55 AM PDT     -0.59 feet Low Tide
Fri -- 04:09 AM PDT     Moonrise
Fri -- 05:56 AM PDT     Sunrise
Fri -- 10:07 AM PDT     3.45 feet High Tide
Fri -- 03:12 PM PDT     1.05 feet Low Tide
Fri -- 06:31 PM PDT     Moonset
Fri -- 08:00 PM PDT     Sunset
Fri -- 09:19 PM PDT     5.80 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
2.81.50.4-0.4-0.6-0.30.51.52.53.23.43.32.721.41.11.21.934.25.25.85.75

Tide / Current Tables for Long Beach, Terminal Island, California
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Long Beach
Click for Map
Fri -- 02:42 AM PDT     -0.97 feet Low Tide
Fri -- 04:10 AM PDT     Moonrise
Fri -- 05:57 AM PDT     Sunrise
Fri -- 09:06 AM PDT     4.22 feet High Tide
Fri -- 01:59 PM PDT     1.82 feet Low Tide
Fri -- 06:32 PM PDT     Moonset
Fri -- 08:00 PM PDT     Sunset
Fri -- 08:17 PM PDT     7.12 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
1.40-0.8-0.9-0.40.61.933.94.243.42.72.11.82.12.94.15.46.57.16.964.5

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 (18,4,5,8)
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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.