Saturday, February17, 2018 L-36.com


Marine Weather and Tides
Manhattan 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 6:33AMSunset 5:41PM Saturday February 17, 2018 6:47 PM PST (02:47 UTC) Moonrise 8:48AMMoonset 8:36PM Illumination 8% Phase: Waxing Crescent; Moon at 3 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- 229 Pm Pst Sat Feb 17 2018
.small craft advisory in effect from Sunday evening through late Monday night...
Tonight..W winds 10 kt in the evening, becoming variable 10 kt or less. Wind waves 2 ft or less. W swell 2 ft at 13 seconds. Patchy dense fog with vsby 1 nm or less after midnight.
Sun..Winds variable 10 kt or less, becoming sw 10 to 15 kt in the afternoon. Wind waves 2 ft or less. W swell 2 to 3 ft at 14 seconds. Patchy fog in the morning.
Sun night..Western portion, W winds 15 to 20 kt becoming nw 20 to 30 kt after midnight. Elsewhere, W winds 10 to 20 kt. Combined seas 3 to 5 ft dominant period 8 seconds, building to 5 to 7 ft dominant period 9 seconds after midnight. Slight chance of rain.
Mon..Western portion, nw winds 25 to 30 kt. Elsewhere, nw winds 15 to 20 kt. Combined seas 6 to 8 ft dominant period 9 seconds. Slight chance of showers in the morning.
Mon night..Western portion, nw winds 25 to 30 kt becoming 20 to 25 kt after midnight. Elsewhere, nw winds 15 to 20 kt becoming 10 to 15 kt after midnight. Combined seas 7 to 9 ft dominant period 8 seconds, subsiding to 5 to 7 ft dominant period 8 seconds after midnight.
Tue..NW winds 10 to 15 kt, becoming W 10 kt in the afternoon. Wind waves 2 ft or less. W swell 3 to 5 ft at 8 seconds.
Tue night..W winds 5 to 10 kt, becoming N after midnight. Wind waves 2 ft or less. W swell 2 to 4 ft at 12 seconds.
Wed..NW winds 5 to 10 kt. Wind waves 2 ft or less. W swell 2 to 3 ft.
Thu..NW winds 10 to 15 kt. Wind waves 2 ft or less. W swell 2 to 3 ft.
PZZ600 229 Pm Pst Sat Feb 17 2018
Synopsis for the southern california coast and santa barbara channel including the channel islands national marine sanctuary and national park..At 22z...or 2 pm pst...a 995 mb low pressure center was located 300 nm northwest of seattle and an inverted trough was located along the california coast. A weak high pressure ridge stretched latitudinally across far northern california. Low clouds and fog will develop tonight and linger into midday tomorrow in many areas. Advisory level winds develop Sunday and gale force winds will be possible across the outer waters late Sunday and Monday.

7 Day Forecast for Marine Location Near Manhattan Beach city, CA
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location: 33.88, -118.41     debug


Area Discussion for - Los Angeles/Oxnard, CA
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Fxus66 klox 180028
afdlox
area forecast discussion... Updated
national weather service los angeles oxnard ca
428 pm pst Sat feb 17 2018

Synopsis 17 810 am.

Above normal temperatures are expected today. An upper level
trough will bring a sharp cooling trend to the area Sunday through
Monday, with areas of gusty winds, night through morning low
clouds, and some light measurable rain and mountain snow across
los angeles county and northern ventura county. Monday night and
Tuesday night will be very cold. Cool and mostly dry weather is
expected Tuesday through Friday.

Short term (tdy-tue)
17 303 pm
skies were sunny across the forecast area this afternoon.

Gradients have trended onshore and the seabreeze kicked in along
the coast by late this morning. Temps this afternoon will be
several degrees above normal across the forecast area, with highs
in the warmest vlys and inland coastal areas expected to top out
in the mid 70s to around 80.

Weak upper level ridging will persist over the forecast area through
early this evening. A large upper level trough that will move into
the pac NW late today and tonight is expected to sag S into NRN ca
for sun, with lowering 500 mb heights and a broad NW flow aloft
developing over SRN ca.

Onshore flow will increase tonight into sun, and a return to marine
layer clouds is expected along many coastal areas into some of the
adjacent vlys later tonight into Sun morning. The low clouds will be
part of a shallow marine inversion of around 500 ft deep later
tonight with patchy dense fog possible, then the inversion should
increase Sun morning to lift any dense fog. Some of these clouds may
persist into Sun afternoon as well especially along the coast.

Otherwise, mostly clear skies can be expected tonight with sunny to
partly cloudy skies on sun.

Gradients will be strongly onshore Sun afternoon, with the nam
forecasting lax-dag to be +7.5 mb at 00z. Gusty NW winds near
advisory levels will affect the central coast Sun afternoon, with
gusty SW winds possibly to advisory levels expected over the l.A.

County mtns and deserts. Temps are forecast to cool substantially
for Sun back to near normal to slightly below normal, with highs in
the warmest vlys and inland coastal areas in the mid 60s to near 70.

The large mainly inside slider upper trof will push into ca sun
night and mon. The 12z ec and NAM have a slightly more over-water
trajectory with this trof and a wetter solution, while the 12z gfs
continues to have the more inland trajectory and drier. Thinking
here is a slight edge toward the NAM ec with slightly more precip
potential Sun night and mon, but precip amounts will still be rather
light at less then 0.10 inch except perhaps up to 0.25 inch on
the N slopes. An eddy will try to develop Sun evening over the
near shore waters of the socal bight, but it is looking more like
a surface cold front will move into the area and disrupt this
development with increasing NW flow over the coastal waters thru
the night. There will still be a SW lower level flow into SRN vtu
county and l.A. County Sun evening before the flow turns NW later
sun night.

Deep marine layer clouds should move into mainly l.A. County sun
evening and linger into early Mon morning along with a slight chance
to chance of rain from the coast to the coastal slopes. Snow levels
will drop quickly by late Sun night down to 3500 to 4500 ft, with
some snow possible on the N mtn slopes.

Upslope flow will bring clouds and a chance of snow showers to the n
mtn slopes and the eastern cuyama vly foothills on Mon into mon
night. Snow showers will probably affect travel on interstate 5 in
nw l.A. County and over the grapevine late Sun night thru Mon night
with about 1 to 3 inches of snow possible. The snow combined with
strong and gusty NW to N winds is expected to create hazardous
wintry driving conditions with poor visibilities in snow and
blowing snow at times. A winter weather advisory for snow and
strong winds is in effect for the l.A. Vtu county mtns from 6 pm
sun thru late Mon night. Please see the latest winter weather
message product (laxwswlox) for more details.

The latest model runs were also showing some moisture with a slight
chance of showers on Mon moving into western and central slo sba
counties and the ventura county interior valleys, san fernando vly
and santa clarita vly. The snow level is expected to drop even
more by early mon, down to 1500 to 2500 ft. With the extremely
low snow levels, there is the potential for light snowfall in the
hills above 1500 ft in these areas especially for Mon morning.

Strong and gusty NW to N winds are expected Sun evening for the
santa ynez mtns and S sba county coast, with strong and gusty nw
winds for the mtns and deserts. Gusty NW to N winds will affect much
of the forecast area on mon. Wind advisories will likely be needed
for Sun evening in some areas including the sba county S coast and
adjacent mtns. Wind advisories will also possible on Mon into mon
evening especially for the central coast, foothills, mtns and
deserts.

Skies will be partly to mostly cloudy across much of the region on
mon. Temps will turn much cooler and several degrees below normal
with highs in the warmest vlys and inland coastal areas only in the
mid 50s to near 60.

For Mon night and tue, the upper trof will slowly move E with
clearing across the forecast area by late Mon night. The gusty nw
winds will diminish into tue. A very cold and dry air mass will help
to contribute to widespread frost and hard freeze conditions mon
night into early Tue in wind-sheltered areas. Low temps in these
areas S and W of the mtns will likely drop into the mid 20s to
lower 30s, except lower 20s in the slo interior vlys. Hard
freeze freeze warnings and frost advisories will likely be needed
in many areas Mon night into Tue morning. Temps on Tue will
continue to be several degrees below normal in all areas.

Long term (wed-sat)
17 302 pm
the ec and GFS do not show much consistency in the finer details
during the extended period except they both keep a broad long wave
upper trof pattern over the western u.S. Another shortwave upper
trof is forecast to move over ca (ec) or off the coast (gfs) on wed
into Wed night. Broad upper troffiness will then persist to some
degree over the region Thu thru sat. The timing, speed and position
of shortwave energy dropping into the long wave trof is off a bit
between the models. The ec forecasts one of the shortwaves to bring
a chance or rain and mtn snow to the forecast area late Thu thru
fri evening. The GFS keeps most of the shortwave energy to the n
and E of southwestern ca, with no pcpn expected over the region.

Have trended toward the GFS with the drier solution. However, have
kept ghost pops in the fcst for late in the week with partly cloudy
skies. Otherwise, mostly clear skies should prevail over the
forecast area thru wed, with partly cloudy skies Thu thru sat. Very
cold overnight lows are expected again Tue night. Frost advisories
and freeze warnings will likely be needed in the coldest wind-
sheltered parts of the coast and vlys, with the ojai valley expected
to drop into the mid 20s again Tue night. Daytime highs will be
near seasonal norms just about everywhere Wed thru sat.

Aviation
18 0027z
at 2312z at klax... There was no marine layer nor was there a sfc
based inversion.

Overall... High confidence in the current tafs through this
08z then low confidence in coastal and adjacent valley tafs due
to uncertainty in the timing of the low clouds and fog. Ifr conds
could linger until 21z at coastal TAF sites.

Klax... High confidence in TAF through 08z then low confidence
due to uncertainty in the timing of low clouds and fog. Low
clouds may not arrive until 12z. Ifr conds could last until 21z.

There is a 30 percent chc of east winds greater than seven knots
11z-17z.

Kbur... High confidence in TAF through 09z then low confidence
due to uncertainty in the timing of low clouds and fog. There is
a 20 percent chc that the low clouds will not arrive. There is a
30 percent chc that the low clouds will not arrive until 13z.

There is a 30 percent chc of MVFR CIGS lasting through 20z.

Marine
17 223 pm
for the outer waters... Small craft advisory (sca) level
northwest winds will develop on Sunday and continue through
Tuesday. There is a thirty percent chance of gale force winds by
Sunday night and a forty percent chance on Monday.

For the inner waters... For the waters north of point sal, sca
level northwest winds will develop each afternoon and evening on
Sunday and Monday with a twenty percent chance of gale force winds
on Monday. For the waters south of point conception, SCA level
west to northwest winds will develop by Sunday night and diminish
early Tuesday with the strongest winds across western sections.

Lox watches warnings advisories
Ca... Winter weather advisory in effect from 6 pm Sunday to 3 am
pst Tuesday for zones 53-54. (see laxwswlox).

Pz... Small craft advisory in effect from 9 am Sunday to 3 am pst
Tuesday for zones 645-676. (see laxmwwlox).

Small craft advisory in effect from 9 pm Sunday to 3 am pst
Tuesday for zones 650-655. (see laxmwwlox).

Small craft advisory in effect from 3 am Sunday to 3 am pst
Tuesday for zones 670-673. (see laxmwwlox).

Gale watch in effect from Sunday evening through late Monday
night for zones 670-673-676. (see laxmwwlox).

Hazard potential outlook (tue-sat)
Gusty and potentially damaging northwest winds are possible
Monday night through early Tuesday. There is also a chance of snow
and gusty winds Monday night combining to create hazardous wintry
driving conditions on the N mountain slopes including i-5 in
northwestern l.A. County and over the grapevine.

It will be very cold during the late night through mid morning
hours Monday night through Wednesday, especially where the winds
diminish. Frost or freezing temperatures will likely occur in the
valleys and coastal areas of santa barbara and san luis obispo
counties, and possibly across interior coastal sections and some
of the sheltered vlys of ventura and los angeles counties.

Public... Sirard
aviation... Rorke
marine... Kj
synopsis... Db b
weather.Gov losangeles


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
ICAC1 - 9410840 - Santa Monica Pier 10 mi48 min W 9.9 G 11 60°F 63°F1017.6 hPa (-0.5)
PXAC1 11 mi48 min NNW 7 G 8
PSXC1 12 mi48 min WNW 6 G 9.9
BAXC1 12 mi48 min NNW 9.9 G 12
46221 - Santa Monica Bay, CA (028) 12 mi48 min 61°F2 ft
PFDC1 13 mi48 min Calm G 1
OHBC1 - 9410660 - Los Angeles, CA 13 mi48 min 62°F1017.2 hPa (-0.6)
PFXC1 14 mi48 min NNW 7 G 8 66°F
AGXC1 14 mi48 min W 8 G 8.9 63°F 1017.3 hPa (-0.6)
PRJC1 16 mi48 min W 5.1 G 8
46256 17 mi56 min 61°F2 ft
46222 - San Pedro, CA (092) 19 mi48 min 61°F2 ft
46253 24 mi48 min 62°F2 ft
46262 34 mi48 min 62°F2 ft
46025 - Santa Monica Basin - 33NM West Southwest of Santa Monica, CA 35 mi38 min WNW 5.8 G 7.8 62°F1017.2 hPa

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, CA4 mi55 minW 1010.00 miPartly Cloudy61°F55°F81%1017.4 hPa
Hawthorne, Hawthorne Municipal Airport, CA5 mi55 minWNW 410.00 miFair63°F48°F60%1017.5 hPa
Torrance, Zamperini Field Airport, CA7 mi61 minW 510.00 miA Few Clouds61°F46°F59%1017.3 hPa
Santa Monica, Santa Monica Municipal Airport, CA11 mi57 minSW 410.00 miFair61°F53°F75%1017.3 hPa
Los Angeles / USC Campus Downtown, CA12 mi61 minWNW 410.00 miFair64°F41°F43%1017.1 hPa
Long Beach, Long Beach Airport, CA14 mi55 minWNW 910.00 miFair67°F34°F30%1017 hPa
Los Alamitos Army Airfield, CA20 mi50 minWNW 710.00 miFair64°F36°F36%1017.2 hPa
Burbank - Bob Hope Airport, CA22 mi55 minSSE 510.00 miFair66°F35°F32%1016.3 hPa
Van Nuys, Van Nuys Airport, CA23 mi57 minVar 310.00 miFair67°F30°F26%1016.7 hPa
Fullerton, Fullerton Municipal Airport, CA23 mi55 minWNW 710.00 miPartly Cloudy68°F36°F31%1016.7 hPa

Wind History from LAX (wind in knots)
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Last 24hrSW9SW10SW3SE4E4E5NE5CalmE5NE4E3CalmE5E4CalmSE33SW8W10W10W11W11W11W10
1 day agoW10SW3CalmE4CalmNE4NE3CalmN4SE4NE3N3NE4N8N4CalmN3SW6SW9W9W12W9W13SW10
2 days agoW7W7SW6SW43Calm3NE3NE3CalmNE3NE3NE3NE4E3NE6NE4W7W11W12W14W14W15W12

Tide / Current Tables for El Segundo, Santa Monica Bay, California
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El Segundo
Click for Map
Sat -- 03:48 AM PST     1.30 feet Low Tide
Sat -- 06:36 AM PST     Sunrise
Sat -- 07:48 AM PST     Moonrise
Sat -- 09:51 AM PST     5.15 feet High Tide
Sat -- 04:34 PM PST     -0.28 feet Low Tide
Sat -- 05:39 PM PST     Sunset
Sat -- 07:36 PM PST     Moonset
Sat -- 10:53 PM PST     4.18 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
3.52.821.41.31.62.43.34.355.14.83.92.71.50.4-0.2-0.20.31.22.33.344.2

Tide / Current Tables for Santa Monica, California
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Santa Monica
Click for Map
Sat -- 03:38 AM PST     1.36 feet Low Tide
Sat -- 06:36 AM PST     Sunrise
Sat -- 07:48 AM PST     Moonrise
Sat -- 09:42 AM PST     5.34 feet High Tide
Sat -- 04:25 PM PST     -0.27 feet Low Tide
Sat -- 05:39 PM PST     Sunset
Sat -- 07:36 PM PST     Moonset
Sat -- 10:44 PM PST     4.32 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
3.52.721.51.41.82.63.64.65.25.34.93.92.71.40.3-0.2-0.20.41.42.63.64.24.3

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 (21,6,7,8)
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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.