Monday, September25, 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 6:42AMSunset 6:44PM Monday September 25, 2017 11:56 AM PDT (18:56 UTC) Moonrise 11:46AMMoonset 10:30PM Illumination 26% Phase: Waxing Crescent; Moon at 5 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- 820 Am Pdt Mon Sep 25 2017
Today..N winds 5 to 10 kt...becoming nw 10 to 15 kt in the afternoon. Wind waves 2 ft or less. W swell 2 ft at 8 seconds.
Tonight..W winds 10 to 15 kt...becoming nw 5 to 10 kt after midnight. Wind waves 2 ft or less. W swell 2 ft at 8 seconds.
Tue..N to ne winds 5 to 10 kt...becoming nw 10 to 15 kt in the afternoon. Wind waves 2 ft or less. W swell 2 to 3 ft at 8 seconds.
Tue night..W winds 10 kt in the evening...becoming variable 10 kt or less. Wind waves 2 ft or less. Mixed swell W 2 to 3 ft at 9 seconds and S 2 ft at 11 seconds.
Wed..NE winds 5 to 10 kt...becoming W 10 kt in the afternoon. Wind waves 2 ft or less. Mixed swell W 2 ft at 10 seconds and S 2 ft at 11 seconds.
Wed 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 10 seconds and S 2 ft at 11 seconds.
Thu..Winds variable 10 kt or less...becoming nw winds 10 to 15 kt in the afternoon. Wind waves 2 ft or less. W swell 2 ft.
Fri..W winds 10 to 15 kt. Wind waves 2 ft or less. W swell 2 ft.
PZZ600 820 Am Pdt Mon Sep 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 1024 mb surface high was building into the great basin, while a 1010 mb thermal trough was along the southern california coast.

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 251830
afdlox
area forecast discussion
national weather service los angeles oxnard ca
1130 am pdt Mon sep 25 2017
updated fire weather discussion

Synopsis
Gradually strengthening offshore flow will bring a warming and
drying trend with mostly clear skies to the area through this week
and into the weekend. There will be some gusty north to northeast
winds at times over the region, especially below and through
passes and canyons. Temperatures will be a few degrees above
normal for many areas early this week, then increase to much
above normal for late this week and into the weekend.

Short term (tdy-wed)
it's going to be a warm week but not record breaking and with the
possible exception of Tuesday winds should be below advisory
levels. Still on the fence for tomorrow's winds and may hold off
issuing advisories since it does appear to be a marginal and
fairly localized case. Temperatures definitely on the rise today
and forecast highs look on track based on the current parameters
and our local guidance based on historical data. Likely a degree
or two of additional warming Tuesday but then a few degrees of
cooling for coast valleys Wed Thu as gradients weaken and lower
level temps decrease slightly. Still well above normal but not as
much as the next couple days. So this is a good little preview of
things to come as we move into our santa ana season but not a
major event by any means.

***from previous discussion***
tonight the gradients will be a little more offshore and there
will be better upper support. This will be enough to generate wind
advisory level gusts 5 to 10 miles either side of the vta la
county line. Aside from the slightly stronger winds Tuesday will
be very similar to today the only other change will be a few more
degrees of warming across the interior.

The offshore flow weakens Wednesday. There will not be enough push
to generate advisory level winds. Instead there will only be gusts
between 20 and 30 mph. There will be an earlier sea breeze and
coastal temps will cool a few degrees ESP near the beaches but the
rest of the area will have temps similar to Tuesday.

Long term (thu-sun)
offshore flow weakens (but still remains offshore) on Thursday.

The upper support vanishes as well as the state will be under a
large cull area. Winds will not be a problem. There will be little
change in temperatures across interior areas but the coasts
will see a few degrees of cooling. The GFS and ECMWF now show
fairly flat 585 dm flow over the area on Fri and sat... No longer a
ridge. Offshore flow continues and temps will really not change
to much. The ridge is now forecast to arrive on Sunday and if this
comes true there will be a few degrees of warming.

Aviation 25 1600z.

At 16z, there was no marine layer at klax.

High confidence inVFR conditions throughout the period.

Moderate-to-high confidence in offshore winds. Periods of moderate
to strong wind shear are possible tonight at mainly terminals
south of point conception.

Klax...VFR conditions are expected throughout the period. There is
a 40 percent chance of moderate wind shear between 00z and 04z. There
is 10 percent chance of east winds greater than 7 knots after
07z.

Kbur...VFR conditions are expected throughout the period. There is
a 50 percent chance of moderate wind shear between 10z and 18z.

Marine 25 900 am.

Moderate-to-high confidence in the current forecast. Main concern
is winds for the outer waters today and across the inner waters
tonight and into Tuesday morning.

Low-end small craft advisory winds will likely develop across the
northern outer waters this afternoon and this evening, otherwise
winds and seas will remain below small craft advisory levels
through at least Friday. Winds will likely increase over the
weekend.

For the inner waters, winds and seas are expected to remain below
sca levels through Friday. There is a 30 percent chance of small
craft advisory north to northeast winds each night and morning
through Thursday across the nearshore waters from ventura south to
santa monica.

Fire weather 25 1130 am.

A long duration of elevated fire danger expected to continue
across portions of southwest california through this upcoming
weekend. Weak to occasionally moderate offshore flow is expected
during this period which will continue to support a prolonged
period of very warm and dry conditions to the region.

In the short term, offshore pressure gradients are expected to
peak today and Tuesday when lax-daggett gradients are expected to
range between -3 and -4 mb each morning. There is the potential
for a slight ramp up in upper level support on Tuesday and
Wednesday as computer models continue to show the potential for a
cutoff low pressure system to develop near the colorado river
valley. Offshore winds are expected to be the strongest across
the mountains today and Tuesday with some weakening for Wednesday
(including the santa monica mountains) when gusts between 30 and
40 mph are expected with local gusts to around 45 mph. Gusts
between 25 and 35 mph are likely for wind prone valley and
interior coastal areas. Offshore flow is expected to be weaker on
Thursday and Friday, then potentially nudge upward again by
Sunday.

This prolonged period of offshore flow will bring widespread
minimum humidities between 10 and 20 percent for areas away from
the coast through next weekend, along with poor overnight
recoveries across the mountains, foothills, and wind exposed
locations. In addition, there will be a prolonged period of very
warm temperatures with highs climbing into the 90s much of this
week in the valleys, and triple digit readings possible Friday
through next weekend. The above mentioned fire weather conditions
combined with fuels becoming critically dry will support this long
duration of elevated fire danger, with an increased risk for
large fires and erratic fire behavior. Brief critical fire weather
conditions are likely for areas with strongest winds today,
Tuesday and possibly Wednesday. Local or brief critical fire
weather conditions may return by Sunday.

Lox watches warnings advisories
Ca... None.

Pz... Small craft advisory in effect from 3 pm this afternoon to 9
pm pdt this evening for zones 670-673. (see laxmwwlox).

Hazard potential outlook (wed-sun)
a prolonged period of elevated fire danger is expected Wednesday
through Sunday due to the combination of gusty offshore winds,
very warm temperatures, low humidities, and very dry fuels. Brief
critical fire weather conditions will be possible at times on
Wednesday and again next weekend. There will be potential heat
impacts next weekend as triple digit temperatures are possible
for warmest valley locations.

Public... Rorke
aviation... Hall
marine... Hall
fire... Munroe gomberg
synopsis... Sweet
weather.Gov losangeles


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
PRJC1 4 mi39 min S 5.1 G 5.1
46256 5 mi35 min 67°F2 ft
PFXC1 5 mi39 min S 6 G 6 69°F
PSXC1 6 mi39 min S 5.1 G 6
PFDC1 6 mi39 min S 4.1 G 5.1
AGXC1 7 mi39 min S 6 G 6 71°F 1011.3 hPa
BAXC1 7 mi39 min S 2.9 G 4.1
PXAC1 8 mi39 min S 5.1 G 6
OHBC1 - 9410660 - Los Angeles, CA 8 mi39 min 66°F1011.3 hPa
46253 12 mi27 min 68°F2 ft
46222 - San Pedro, CA (092) 13 mi27 min 66°F2 ft
ICAC1 - 9410840 - Santa Monica Pier 27 mi45 min W 1.9 G 2.9 70°F 67°F1011.3 hPa
46221 - Santa Monica Bay, CA (028) 28 mi27 min 70°F2 ft
46262 47 mi27 min 68°F2 ft
46025 - Santa Monica Basin - 33NM West Southwest of Santa Monica, CA 49 mi27 min W 1.9 G 1.9 67°F1010.9 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 mi2 hrsN 010.00 miPartly Cloudy75°F39°F27%1011.4 hPa
Long Beach, Long Beach Airport, CA6 mi64 minN 010.00 miFair82°F30°F16%1011 hPa
Fullerton, Fullerton Municipal Airport, CA12 mi64 minN 010.00 miPartly Cloudy83°F33°F17%1010.5 hPa
Torrance, Zamperini Field Airport, CA12 mi70 minWNW 710.00 miA Few Clouds81°F32°F17%1011.2 hPa
John Wayne-Orange County Airport, CA14 mi64 minSW 710.00 miA Few Clouds77°F51°F40%1010.6 hPa
Hawthorne, Hawthorne Municipal Airport, CA18 mi64 minWSW 310.00 miFair81°F34°F18%1010.9 hPa
Los Angeles, Los Angeles International Airport, CA20 mi64 minVar 310.00 miPartly Cloudy82°F32°F16%1010.8 hPa
Los Angeles / USC Campus Downtown, CA21 mi70 minN 010.00 miFair84°F36°F18%1010.3 hPa

Wind History from SLI (wind in knots)
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Last 24hrCalmS10S10SW12SW12SW11NW10NW6CalmCalmSW3CalmCalmW3CalmCalmCalmCalmCalmCalmCalmCalmCalmCalm
1 day agoSW9S7SW8SW10SW11S11S5W5NW4CalmCalmCalmCalmCalmNE3NE4CalmCalmCalmCalmCalmCalmCalmCalm
2 days agoSW7SW10S10SW12SW13SW12SW11W9NW4W5CalmSW3CalmS3CalmCalmE3E3NE3NE4NE3SE4E4SW5

Tide / Current Tables for Los Patos (highway bridge), California
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Los Patos (highway bridge)
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Mon -- 02:15 AM PDT     3.06 feet High Tide
Mon -- 06:42 AM PDT     Sunrise
Mon -- 07:28 AM PDT     1.45 feet Low Tide
Mon -- 11:45 AM PDT     Moonrise
Mon -- 01:42 PM PDT     3.99 feet High Tide
Mon -- 06:44 PM PDT     Sunset
Mon -- 09:18 PM PDT     0.82 feet Low Tide
Mon -- 10:30 PM PDT     Moonset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
2.42.8332.62.21.71.51.51.82.32.93.53.943.83.32.721.510.80.91.2

Tide / Current Tables for Long Beach, Terminal Island, California
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Long Beach
Click for Map
Mon -- 01:21 AM PDT     3.70 feet High Tide
Mon -- 06:20 AM PDT     2.45 feet Low Tide
Mon -- 06:43 AM PDT     Sunrise
Mon -- 11:45 AM PDT     Moonrise
Mon -- 12:46 PM PDT     4.82 feet High Tide
Mon -- 06:44 PM PDT     Sunset
Mon -- 08:11 PM PDT     1.33 feet Low Tide
Mon -- 10:30 PM PDT     Moonset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
3.43.73.63.432.72.52.52.83.33.94.44.74.84.64.13.42.721.51.31.41.72.2

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 (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.