Sunday, September24, 2017 L-36.com


Marine Weather and Tides
Santa Monica, 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 6:49PM Saturday September 23, 2017 11:51 PM PDT (06:51 UTC) Moonrise 9:58AMMoonset 9:15PM Illumination 13% Phase: Waxing Crescent; Moon at 4 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- 812 Pm Pdt Sat Sep 23 2017
Tonight..NW to N winds 10 to 15 kt...becoming 5 to 10 kt after midnight. Wind waves 2 ft or less. W swell 2 to 3 ft at 7 seconds.
Sun..Winds variable 10 kt or less...becoming W 10 to 15 kt in the afternoon. Wind waves 2 ft or less. W swell 2 ft at 7 seconds.
Sun night..W winds 10 to 15 kt...becoming N 5 to 10 kt after midnight. Wind waves 2 ft or less. W swell 2 ft at 8 seconds.
Mon..Winds variable 10 kt or less...becoming W 10 to 15 kt in the afternoon. Wind waves 2 ft or less. W swell 2 ft at 10 seconds.
Mon night..W winds 10 to 15 kt in the evening...becoming variable 10 kt or less. Wind waves 2 ft or less. W swell 2 ft at 10 seconds.
Tue..Winds variable 10 kt or less...becoming W 10 to 15 kt in the afternoon. Wind waves 2 ft or less. S swell 2 ft at 12 seconds.
Tue night..W winds 10 to 15 kt in the evening...becoming variable 10 kt or less. Wind waves 2 ft or less. S swell 2 ft.
Wed..NW winds 10 to 15 kt. Wind waves 2 ft or less. S swell 2 ft.
Thu..W winds 10 to 15 kt. Wind waves 2 ft or less. S swell 2 ft.
PZZ600 812 Pm Pdt Sat Sep 23 2017
Synopsis for the southern california coast and santa barbara channel including the channel islands national marine sanctuary and national park..At 03z...or 8 pm pdt....A 1025 mb high pressure center was located 900 nm nw of point conception...and a 1004 mb low was near las vegas. The high will push into nevada through early next week. Short period choppy seas will persist into next week.

7 Day Forecast for Marine Location Near Santa Monica, CA
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location: 34.01, -118.52     debug


Area Discussion for - Los Angeles/Oxnard, CA
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Fxus66 klox 240342
afdlox
area forecast discussion
national weather service los angeles oxnard ca
842 pm pdt Sat sep 23 2017

Synopsis
Gradually strengthening offshore flow will bring a warming and
drying trend with mostly clear skies to the area through next
week. 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 by
early next week, then increase to much above normal by late in
the week.

Short term (sat-tue)
a rather quiet evening on the forecast desk as we have a non-
existent inversion and no clouds across southwest california or
the coastal waters. Temperatures peaked out well below normal for
most areas for another day, but that will change tomorrow. Locally
gusty north to northwest winds occurring near canyons and passes
of the santa ynez range, but speeds are below last evening. Also
getting gusty winds over the san gabriel mountains and parts of
the antelope valley this evening. Expect winds to slowly decrease
during the night across south santa barbara county while across
western los angeles and eastern ventura counties northeast winds
will increase. A weak santa ana will make an appearance late
tonight and into Sunday morning and could make it briefly to the
oxnard plain and into the santa monica mountains. A few gusts
could exceed wind advisory levels (35 mph) across the moorpark to
simi valley area and near the 126 freeway, but gusty conditions
should not be widespread or long-lasting. Winds will shift back to
onshore in the afternoon. This will be the start of significant
warming and drying trend across the region. Temperatures will
rebound to near normal on Sunday with a few coastal areas possibly
pushing above normal before the seabreeze arrives. Some mountain
areas will see 15-20 degree temperature increases on Sunday
compared to today. A large upper trough over the great basin will
be reinforced by another low pressure system dropping into the
southwest states by mid-week.

***from previous discussion***
for Sunday morning, lax-daggett gradient expected to be around -3
mb, and could increase to between -3.5 and -4 mb range on Monday
and Tuesday mornings. Upper level wind support is fairly weak
on Sunday and Monday but could nudge up a bit by Tuesday Tuesday
night as models trending towards a closed low developing somewhere
in the deserts of southeast california. For the most part,
expecting winds to remain below advisory levels during the short
term, with gusts generally ranging between 30 and 40 mph in the
mountains (including the santa monicas), and between 20 and 30 mph
in the valleys.

The combination of gusty offshore winds along with warmer
temperatures, lowering humidities, and very dry fuels will bring
an extended period of elevated fire danger, with brief critical
fire weather conditions possible. Please see fire discussion below
for more details.

Long term (wed-sat)
long range models still showing potential for northeast winds
gusting between 30 and 40 mph across the mountains on Wednesday,
then offshore winds should diminish slightly for Thursday and
Friday. Despite the weakening of the offshore flow, temperatures
away from the coast are expected to continue climbing well into
the 90s on Wednesday and Thursday, with the potential for
isolated triple digit readings in the valleys by Friday. While
earlier model runs had suggested that next Saturday could bring
the warmest temperatures of the next 7 days with a slight
resurgence of offshore flow, the latest 12z ECMWF has thrown a
bit of a curve ball with a weak cutoff low digging down the
coast. If this solution were to verify, we would have to begin
a cooling trend for next Saturday, but for now, will ride the
course til we get some better model convergence. Also of note,
there will be some very warm overnight low temperatures in
the foothills and wind exposed locations.

Aviation 24 00z.

At 00z at klax... There was no notable inversion.

Overall... High confidence in this TAF package. There is a slight
chance (20 percent) of patchy ifr conditions at central coast
terminals, mainly smx from 08-14z due to potential fog
development. Less than 10 percent chance of MVFR conditions at
either lax or lgb from 08-16z. Offshore flow should help keep
clouds from forming at majority of terminals forVFR conditions,
then coastal sites should see a return seabreeze after 19z.

Klax... High confidence in the current taf. There is a ten
percent chance of MVFR conditions with east winds less than 8kt
from 08-16z. OtherwiseVFR conditions will prevail.

Kbur... High confidence in the current taf.VFR conditions will
prevail. Northeast winds less than 10kt from 10-18z.

Marine 23 800 pm.

Confident in low-end small craft advisory (sca) level winds
continuing over the outer waters through tonight, especially
between point conception and san nicolas island. The western santa
barbara channel will also see low-end SCA winds this evening, but
should be localized and brief enough to not need an advisory. All
areas will experience a short-period chop from these winds into
Sunday. No expecting SCA winds through the middle of next week,
but afternoon and evening onshore winds will get into the 10 to 20
kt range everywhere starting Sunday with the warm conditions
inland. Pockets of dense fog cannot be ruled at times through next
week... Please stay aware of your immediate environment.

Fire weather 23 200 pm.

A long duration of elevated fire danger expected across portions
of southwest california beginning Sunday, and potentially
persisting through next weekend. Weak to occasionally moderate
offshore flow is expected during this period which will bring a
prolonged period of very warm and dry conditions to the region.

In the short term, offshore pressure gradients are expected to
peak Monday through Wednesday 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 are showing the potential for
a cutoff low pressure system to develop near the colorado river
valley. At this time, current thinking is that offshore winds
will be strongest across the mountains Monday through Wednesday
(including the santa monica mountains) when gusts between 30
and 40 mph are expected, with lighter offshore winds surfacing
across the valleys. Offshore flow is expected to be somewhat
weaker on Thursday and Friday, then potentially nudge upward
again next weekend.

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 next
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. There is also the potential
for brief critical fire weather conditions each day from Monday
through Wednesday (especially in the mountains) as well as next
weekend.

Lox watches warnings advisories
Ca... None.

Pz... Small craft advisory in effect until 3 am pdt Sunday for
zones 670-673-676. (see laxmwwlox).

Hazard potential outlook (tue-sat)
a prolonged period of elevated fire danger is expected Tuesday
through Saturday 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
especially in the mountains. There will be potential heat
impacts by Friday and Saturday as triple digit temperatures
are possible for warmest valley locations.

Public... Boldt gomberg
aviation... Boldt
marine... Kittell sirard
fire... Gomberg
synopsis... Sirard
weather.Gov losangeles


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
ICAC1 - 9410840 - Santa Monica Pier 1 mi52 min Calm G 1 63°F 67°F1011 hPa (+0.4)
46221 - Santa Monica Bay, CA (028) 12 mi52 min 67°F2 ft
PXAC1 22 mi52 min Calm G 1
BAXC1 22 mi52 min Calm G 1
PSXC1 23 mi52 min SSE 1 G 1.9
PFXC1 24 mi52 min S 1.9 G 2.9 65°F
PFDC1 24 mi52 min SSE 1 G 1.9
OHBC1 - 9410660 - Los Angeles, CA 24 mi52 min 65°F1011 hPa (+0.4)
AGXC1 25 mi52 min S 2.9 G 2.9 64°F 1010.8 hPa (+0.4)
PRJC1 26 mi52 min SSW 2.9 G 2.9
46256 27 mi60 min 65°F2 ft
46222 - San Pedro, CA (092) 29 mi52 min 64°F3 ft
46025 - Santa Monica Basin - 33NM West Southwest of Santa Monica, CA 34 mi42 min NNW 9.7 G 12 68°F1010 hPa
46253 35 mi52 min 67°F2 ft

Wind History for Santa Monica, CA
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Santa Monica, Santa Monica Municipal Airport, CA4 mi61 minN 010.00 miFair62°F59°F90%1010.7 hPa
Los Angeles, Los Angeles International Airport, CA8 mi59 minN 010.00 miFair65°F55°F73%1010.6 hPa
Hawthorne, Hawthorne Municipal Airport, CA11 mi59 minN 010.00 miFair66°F55°F70%1010.7 hPa
Los Angeles / USC Campus Downtown, CA13 mi65 minVar 310.00 miFair65°F55°F73%1010.4 hPa
Van Nuys, Van Nuys Airport, CA14 mi61 minN 010.00 miFair63°F43°F48%1009.9 hPa
Burbank - Bob Hope Airport, CA16 mi59 minESE 510.00 miFair64°F51°F63%1009.7 hPa
Los Angeles, Whiteman Airport, CA18 mi4 hrsN 010.00 miClear66°F51°F60%1011.8 hPa
Torrance, Zamperini Field Airport, CA18 mi4.1 hrsWNW 610.00 miClear64°F46°F52%1010.2 hPa
Long Beach, Long Beach Airport, CA23 mi59 minN 010.00 miFair65°F53°F66%1010.7 hPa

Wind History from SMO (wind in knots)
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Last 24hrCalmCalmNE3NE3CalmN3NE3CalmNE34CalmCalmSW9W6SW11W8W10SW8SW8SW6CalmS4CalmCalm
1 day agoNE4NE4NE3NE4NE4NE3NE3CalmNE3SE5CalmE5SW9SW10SW10W9W10
G15
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2 days agoSE3SW5CalmCalmCalmCalmSW3SW3W5W7W6W8SW12
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W10SW5CalmNE4NE6NE4NE4

Tide / Current Tables for Santa Monica, California
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Santa Monica
Click for Map
Sun -- 12:23 AM PDT     4.11 feet High Tide
Sun -- 05:51 AM PDT     1.96 feet Low Tide
Sun -- 06:43 AM PDT     Sunrise
Sun -- 10:53 AM PDT     Moonrise
Sun -- 12:10 PM PDT     5.03 feet High Tide
Sun -- 06:47 PM PDT     Sunset
Sun -- 07:07 PM PDT     1.18 feet Low Tide
Sun -- 09:51 PM PDT     Moonset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
4.143.73.12.52.122.22.73.54.24.854.94.43.62.821.41.21.31.72.32.9

Tide / Current Tables for El Segundo, Santa Monica Bay, California
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El Segundo
Click for Map
Sun -- 12:31 AM PDT     4.01 feet High Tide
Sun -- 06:01 AM PDT     1.85 feet Low Tide
Sun -- 06:43 AM PDT     Sunrise
Sun -- 10:52 AM PDT     Moonrise
Sun -- 12:19 PM PDT     4.88 feet High Tide
Sun -- 06:47 PM PDT     Sunset
Sun -- 07:14 PM PDT     1.09 feet Low Tide
Sun -- 09:51 PM PDT     Moonset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
443.63.12.521.922.53.244.64.94.84.43.62.821.41.11.21.62.22.8

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 (2,6,7,8)
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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.