Friday, October20, 2017 L-36.com


Marine Weather and Tides
El Segundo, 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 7:02AMSunset 6:13PM Friday October 20, 2017 5:39 AM PDT (12:39 UTC) Moonrise 7:47AMMoonset 7:12PM 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- 226 Am Pdt Fri Oct 20 2017
.small craft advisory in effect through this evening...
Today..Western portion, W to nw winds 15 to 25 kt with local gusts to 30 kt. Eastern portion, winds variable 10 kt or less, becoming W 15 to 20 kt with gusts to 25 kt in the afternoon. Combined seas 6 to 8 ft dominant period 7 seconds. Slight chance of showers in the morning.
Tonight..NW winds 15 to 25 kt with local gusts to 35 kt, becoming N 10 to 15 kt after midnight. Strongest western portion. Combined seas 6 to 8 ft dominant period 17 seconds, subsiding to 4 to 6 ft dominant period 16 seconds after midnight.
Sat..N to ne winds 5 to 15 kt, becoming nw 10 to 15 kt in the afternoon. Wind waves 2 ft or less. W swell 3 to 5 ft at 15 seconds.
Sat night..NW winds 10 to 15 kt, becoming N to ne 5 to 10 kt after midnight. Wind waves 1 to 3 ft. W swell 3 to 4 ft at 14 seconds.
Sun..N to ne 5 to 15 kt, becoming W 10 to 15 kt in the afternoon. Wind waves 2 ft or less. W swell 3 ft at 13 seconds. S swell 2 ft.
Sun night..W winds 10 to 15 kt, becoming ne 5 to 15 kt after midnight. Wind waves 2 ft or less. Mixed swell W 3 ft at 13 seconds and S 2 ft at 18 seconds.
Mon..From point mugu to santa Monica, ne winds 15 to 20 kt with gusts to 25 kt, becoming nw to N 10 to 15 kt by late afternoon. Elsewhere, ne winds 5 to 10 kt, becoming nw 10 to 15 kt in the afternoon. Combined seas 3 to 5 ft.
Tue..From point mugu to santa Monica, ne winds 15 to 20 kt with gusts to 25 kt, becoming nw to N 10 to 15 kt by late afternoon. Elsewhere, ne winds 5 to 10 kt, becoming nw 10 to 15 kt in the afternoon. Combined seas 3 to 4 ft.
PZZ600 226 Am Pdt Fri Oct 20 2017
Synopsis for the southern california coast and santa barbara channel including the channel islands national marine sanctuary and national park..At 09z...or 2 am pdt...a 1026 mb high was located 500 nm west of point conception and a 1012 mb thermal low was near las vegas. Gale force winds are likely across the outer water late this afternoon through tonight.

7 Day Forecast for Marine Location Near El Segundo, CA
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location: 33.91, -118.43     debug


Area Discussion for - Los Angeles/Oxnard, CA
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Fxus66 klox 201145
afdlox
area forecast discussion
national weather service los angeles oxnard ca
445 am pdt Fri oct 20 2017

Synopsis
A weak cold front moving over the region today will bring a mix of
clouds and sun, breezy to gusty winds, and a showery weather
pattern to the area. Offshore flow will develop into Saturday
behind the trough. Hot temperatures are expected for early next
week as a santa ana develops. Record heat is possible for Monday
and Tuesday. Cooling could occur for the latter half of next week.

Short term (tdy-sun)
the latest satellite imagery shows a weak cold front dropping
south across central california attached to a cold trough of low
pressure along the pacific northwest coast. The cold front is
sitting from near the monterey bay and stretching out to the
southwest. With marginal moisture and instability, pops were
nudged a bit higher for today and into this evening. The main
threat will be a mix of clouds and Sun and gusty winds for
portions of the area. If showers develop, the best chance for any
measurable rain will span from areas north of point conception to
the northern slopes of the mountains. The south coast of san
barbara, the ventura county coast and valleys, and western los
angeles county will likely be rain shadowed as the northerly flow
downslopes into the south coast basin. Shower activity could
pickup across southeastern los angeles county and into areas of
south of los angeles county. Wind advisories have been posted for
the central coast, southern santa barbara county, the ventura
county coast, the santa clarita and antelope valleys, and for the
los angeles and ventura county mountains through at least this
evening. Motorists traveling across the area today are advised to
use caution due to gusty cross winds on area roadways. Blowing
dust may also create travel impacts across the antelope valley
today and into this evening.

Gusty northerly winds will continue into early Saturday with
sundowner winds continuing across southern santa barbara county
and northerly winds lingering through the interstate 5 corridor in
the los angeles and ventura county mountains. A cool night could
develop across portions of the area tonight, mainly areas north of
point conception. Temperatures have been nudged slightly cooler
for tonight over the previous forecast.

The flow pattern will turn from northerly to more northeasterly on
Saturday. A santa ana weather pattern developing will bring a
warming trend through the weekend along with breezy to windy
conditions across the southland. Advisory level winds may develop
between Saturday and Sunday across portions of the area, but winds
will likely strengthen on Sunday night and into Monday.

Long term (mon-thu)
a significant warming trend is forecast for Monday and Tuesday as
offshore pressure gradients peak across the area. Offshore flow
will combine with strong high pressure aloft to bring a mix of gusty
santa ana winds, record hot conditions, and dry conditions to the
area. Heat risk will be on the rise for early next week as record
hot temperatures develop. The forecast continues to take a warmer
than guidance stance as model output statistic trend toward
climatology in the long term portions of the forecast. Surface
gradients and compressional heating will likely win out to bring
record level heat to the region. 06z nam-wrf solutions back up
this idea with the thermal surface trough deepening on Monday. An
excessive heat watch remains in place for early next week.

Advisory level winds could also be the mix for Monday, which
could make the coast much hotter than the current forecast and the
valleys somewhat cooler than the current forecast.

Offshore flow starts to weaken and high pressure starts to break
down on Wednesday. Model solutions continue to disagree on when
more pronounced cooling will arrive to the area. GFS solutions
tend to want to delay a weak cold front moving south until Friday,
while ECMWF solutions are much more progressive with it, pushing
it into the area on Thursday. The forecast trends more toward the
idea of the GFS hanging on to the ridge a little longer.

Aviation 20 1145z...

at 1130z, the marine inversion at klax was based at 3700 feet. The
top of the inversion was 6800 feet with a temperature of 12
degrees celsius.

Overall, moderate confidence in 12z TAF package. Deep moist layer
and dying cold front will generate MVFR toVFR CIGS across the
area with the central coast and interior coastal plain and valleys
of ventura la counties the most likely to experience CIGS this
morning. Clouds should dissipate by late morning withVFR
conditions for all areas this afternoon and tonight. Main issue
this afternoon and evening will be gusty west to northwest winds.

Klax... Moderate confidence in 12z taf. There is a 30% chance of
MVFR CIGS 12z-16z. West winds, gusting to 30 kt, will be likely
this afternoon and early evening.

Kbur... Moderate confidence in 12z taf. Dissipation of MVFR cigs
could be delayed until 16z or 17z. There is a 30% chance of llws
and turbulence after 03z.

Marine 20 200 am...

for the outer waters, high confidence in current forecast. Small
craft advisory (sca) level winds this morning will increase to
gale force levels this afternoon through tonight. The winds will
diminish on Saturday, but remain at SCA levels through Monday.

For the inner waters, moderate confidence in the current
forecast. For the waters north of point sal, winds are expected to
increase to gale force levels this afternoon through tonight. On
Saturday, the winds will diminish, but SCA level winds are
anticipated through Sunday. For the waters south of point
conception, SCA level winds are expected through tonight with the
strongest winds across western sections and a 30% chance of gale
force gusts across the western santa barbara channel. From Sunday
night through Tuesday, there is a 50% chance of SCA level
northeasterly winds nearshore from ventura southward.

A large long-period NW swell will move into our waters Friday and
persist through the weekend. Seas up to 15 feet are likely across
the outer and northern waters. There will likely be dangerous
breaking waves on the central coast through the weekend with
dangerous conditions in near harbors. South of point
conception... The westerly swell will contribute to continued
hazardous conditions at the beaches through this weekend.

Beaches 20 200 am...

central coast... A significant storm system in the gulf of alaska
has caused large swells to develop. These large northwest swells
will approach the central coast by this morning. A high surf
advisory has been issued valid for the central coast from this
morning through Sunday morning. Surf will quickly rise to around
10 to 12 feet initially this morning. By this evening through
early Saturday, surf should increase to between 14 and 20 feet.

Surf will then begin to lower through Saturday afternoon into
Sunday morning, but remain above 10 feet. Some impacts from these
large and powerful waves and strong currents would be the risk of
ocean drowning. Also sneaker waves can suddenly overrun previously
dry beaches and jetties. With surf approaching 20 feet, some low
lying beach parking lots, harbor walkways and campgrounds could
see local coastal flooding during the peak of the highest surf.

South of point conception... The large northwest swell forecast to
bring very large surf to the central coast should filter some of
the energy into the southern california bight allowing for higher
surf potential by this weekend. Confidence is high with respect to
elevated surf (3 to 6 feet with local sets to 8 feet) and
dangerous rip currents. So, the beach hazards statement has been
extended through Sunday afternoon.

Fire weather 19 315 pm.

A weakening cold front will move through the region bringing a
slight chance of rain showers or drizzle to many areas overnight
into Friday morning. The main impact will be increasing northwest
winds with and behind the front which will bring elevated fire
danger to many areas Friday into Friday night. The strongest winds
tonight through Friday night will be focused across the
mountains, antelope valley, central coast, and santa barbara
county south coast where gusts between 40 and 50 mph will be
common. Humidites are not expected to be sufficiently low during
this time to warrant any red flag warnings.

Northerly flow on Saturday and Saturday night is expected to
bring a warming and drying trend along with elevated fire danger
to the region. The strongest winds during this period will remain
focused across the mountains, especially the interstate 5 corridor
and santa ynez mountains where gusts between 40 and 50 mph can be
expected. A fire weather watch has been issued accordingly for
the mountains beginning Saturday.

From Sunday through Tuesday, there is the potential for a
prolonged duration of gusty santa ana winds hot and very dry
conditions. The strongest santa ana winds during this period is
expected to be Monday through Tuesday when gusts between 35 and 50
mph will be possible across wind prone passes and canyons of los
angeles and ventura counties. Record breaking triple digit heat
and humidities lowering into the single digits and lower teens
will be possible during this time. In addition, very warm and dry
conditions during the overnight hours in the mountains, foothills,
and wind prone areas will add to this fire weather threat during
this long duration of dangerous fire weather conditions. A fire
weather watch is in effect for the mountains and valleys of los
angeles and ventura counties Sunday through Tuesday, and may need
to be expanded into coastal areas as we draw closer to the event.

Lox watches warnings advisories
Ca... High surf advisory in effect until noon pdt Sunday for zones
34-35. (see laxcfwlox).

Wind advisory in effect from 10 am this morning to 10 pm pdt
this evening for zones 34-35-40-88. (see laxnpwlox).

Wind advisory in effect until 3 am pdt Saturday for zones
39-52>54. (see laxnpwlox).

Excessive heat watch in effect from Monday morning through
Tuesday evening for zones 39>41-44>46-88-547. (see laxnpwlox).

Beach hazards statement in effect through Sunday afternoon
for zones 40-41. (see laxcfwlox).

Wind advisory in effect until 10 pm pdt this evening for zone
59. (see laxnpwlox).

Fire weather watch in effect from Sunday morning through
Tuesday afternoon for zones 244>246-288-547-548. (see laxrfwlox).

Fire weather watch in effect from Saturday morning through
Sunday morning for zone 252. (see laxrfwlox).

Fire weather watch in effect from Saturday morning through
Tuesday afternoon for zones 253-254. (see laxrfwlox).

Pz... Gale warning in effect from 3 pm this afternoon to 9 pm pdt
this evening for zone 645. (see laxmwwlox).

Small craft advisory in effect until 3 am pdt Saturday for
zone 650. (see laxmwwlox).

Small craft advisory in effect until 9 pm pdt this evening
for zone 655. (see laxmwwlox).

Small craft advisory in effect until 3 pm pdt this afternoon
for zones 670-673-676. (see laxmwwlox).

Gale warning in effect from 3 pm this afternoon to 3 am pdt
Saturday for zones 670-673-676. (see laxmwwlox).

Hazard potential outlook (sun-thu)
hot temperatures and elevated fire weather conditions are
expected into early next week as another santa ana develops.

Record heat is possible for Monday and Tuesday. High surf and
strong rip currents will linger along central coast beaches
Sunday.

Public... Hall
aviation... Rat
marine... Rat
beaches... Rat
fire... Gomberg
synopsis... Hall
weather.Gov losangeles


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
ICAC1 - 9410840 - Santa Monica Pier 8 mi58 min W 5.1 G 6 65°F 68°F1012.6 hPa
46221 - Santa Monica Bay, CA (028) 11 mi40 min 68°F6 ft
PXAC1 13 mi52 min NW 6 G 8.9
BAXC1 14 mi52 min WNW 15 G 16
PSXC1 15 mi52 min W 7 G 13
PFXC1 16 mi52 min WNW 13 G 18 67°F
PFDC1 16 mi52 min WSW 13 G 15
OHBC1 - 9410660 - Los Angeles, CA 16 mi52 min 67°F1012.7 hPa
AGXC1 17 mi52 min W 11 G 14 67°F 1012.7 hPa
PRJC1 18 mi52 min WNW 15 G 19
46256 19 mi48 min 68°F4 ft
46222 - San Pedro, CA (092) 21 mi40 min 68°F5 ft
46253 27 mi40 min 69°F5 ft
46262 34 mi40 min 70°F6 ft
46025 - Santa Monica Basin - 33NM West Southwest of Santa Monica, CA 35 mi40 min W 25 G 29 69°F1012.2 hPa (-0.0)

Wind History for Santa Monica, CA
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Los Angeles, Los Angeles International Airport, CA3 mi47 minW 69.00 miPartly Cloudy63°F61°F93%1012.3 hPa
Hawthorne, Hawthorne Municipal Airport, CA5 mi47 minN 010.00 miA Few Clouds64°F60°F87%1012.3 hPa
Santa Monica, Santa Monica Municipal Airport, CA8 mi49 minW 410.00 miOvercast65°F60°F84%1012.3 hPa
Los Angeles / USC Campus Downtown, CA11 mi53 minN 05.00 miLight Rain Fog/Mist66°F63°F90%1011.8 hPa
Long Beach, Long Beach Airport, CA16 mi47 minW 610.00 miFair64°F60°F87%1012.2 hPa
Burbank - Bob Hope Airport, CA20 mi47 minS 410.00 miOvercast63°F57°F84%1011.2 hPa
Van Nuys, Van Nuys Airport, CA21 mi49 minWSW 310.00 miOvercast61°F57°F87%1011.8 hPa
Los Alamitos Army Airfield, CA22 mi42 minW 310.00 miFair61°F57°F86%1012.5 hPa
Fullerton, Fullerton Municipal Airport, CA24 mi47 minN 010.00 miOvercast65°F61°F87%1011.9 hPa

Wind History from LAX (wind in knots)
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Last 24hrE5E6E33SE5SW5W8W8SW9SW12W12SW8SW6W6SE53SW53E4E5E5CalmCalmW6
1 day ago4SE4SE3NE5E6S3W9W8W13W13W9SW6W9W5SW9W11SW6S4S5E3NE4CalmNE3E5
2 days agoCalmCalmNW5NW5NW3SW3W9W11W11W10W8W8W8W5S6S4SE6S5SE3S3NE3E5E3E4

Tide / Current Tables for El Segundo, Santa Monica Bay, California
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El Segundo
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Fri -- 03:56 AM PDT     1.13 feet Low Tide
Fri -- 07:03 AM PDT     Sunrise
Fri -- 07:46 AM PDT     Moonrise
Fri -- 10:08 AM PDT     5.67 feet High Tide
Fri -- 04:45 PM PDT     0.13 feet Low Tide
Fri -- 06:13 PM PDT     Sunset
Fri -- 07:11 PM PDT     Moonset
Fri -- 10:54 PM PDT     4.42 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
3.932.11.41.11.42.23.34.45.35.75.44.73.52.210.30.10.61.52.53.54.24.4

Tide / Current Tables for Santa Monica, California
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Santa Monica
Click for Map
Fri -- 03:47 AM PDT     1.23 feet Low Tide
Fri -- 07:03 AM PDT     Sunrise
Fri -- 07:47 AM PDT     Moonrise
Fri -- 09:58 AM PDT     5.82 feet High Tide
Fri -- 04:35 PM PDT     0.20 feet Low Tide
Fri -- 06:13 PM PDT     Sunset
Fri -- 07:12 PM PDT     Moonset
Fri -- 10:45 PM PDT     4.53 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
3.9321.41.21.62.53.64.75.55.85.54.63.42.110.30.20.81.72.83.84.44.5

Weather Map and Satellite Images
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Weather Map
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IR Satellite Image from GEOS
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GOES Local Image of Southwest    EDIT
Geos

Wind Forecast for Los Angeles/Oxnard, CA (8,2,3,4)
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Ground Weather Radar Station Santa Ana Mtns, CA
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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.