Sunday, July23, 2017 L-36.com


Marine Weather and Tides
La Crescenta-Montrose, 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 8:02PM Saturday July 22, 2017 11:50 PM PDT (06:50 UTC) Moonrise 5:11AMMoonset 7:32PM Illumination 0% Phase: New Moon; Moon at 29 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- 813 Pm Pdt Sat Jul 22 2017
Tonight..W winds 5 to 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 8 seconds and S 2 ft at 14 seconds. Patchy fog after midnight.
Sun..Winds variable 10 kt or less...becoming sw 10 to 15 kt in the afternoon. Wind waves 2 ft or less. Mixed swell W 3 ft at 8 seconds and S 2 ft at 13 seconds. Patchy fog in the morning.
Sun night..SW winds 10 to 15 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 12 seconds. Patchy fog after midnight.
Mon..Winds variable 10 kt or less...becoming sw 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. Slight chance of Thunderstorms in the afternoon.
Mon night..SW 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. Slight chance of Thunderstorms in the evening.
Tue..Winds variable 10 kt or less...becoming sw 10 to 15 kt in the afternoon. Wind waves 2 ft or less. Mixed swell W 2 to 3 ft at 9 seconds and S 2 ft at 12 seconds.
Tue night..SW 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 9 seconds and S 2 ft at 12 seconds. Patchy fog after midnight.
Wed..W winds 10 to 15 kt. Wind waves 2 ft or less. Mixed swell W 2 ft and S 2 ft. Patchy fog.
Thu..W winds 10 to 15 kt. Wind waves 2 ft or less. Mixed swell W 2 ft and S 2 ft. Patchy fog.
PZZ600 813 Pm Pdt Sat Jul 22 2017
Synopsis for the southern california coast and santa barbara channel including the channel islands national marine sanctuary and national park..At 02z...or 7 pm pdt...1026 mb surface high pressure was centered 550 nm miles northwest of point conception and a 1006 mb thermal low was located over southern nevada.

7 Day Forecast for Marine Location Near La Crescenta-Montrose, CA
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location: 34.26, -118.28     debug


Area Discussion for - Los Angeles/Oxnard, CA
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Fxus66 klox 230628
afdlox
area forecast discussion
national weather service los angeles oxnard ca
1128 pm pdt Sat jul 22 2017

Aviation discussion updated...

Synopsis
A typical summer weather pattern will bring night through morning
low clouds and fog to the coasts and some of the valleys through
next Saturday, except for Monday into Tuesday when plenty of
monsoonal moisture will move into the area with plenty of
cloudiness. There will also be a slight chance of thunderstorms
for many areas Monday, and in the deserts and mountains on
Tuesday. Temperatures will be near normal to slightly above normal
overall through the end of next week.

Update
Forecast is on track this evening and no updates are planned.

Temps today at the coast were very close to yesterdays readings
and were a couple of degrees above normal. Valley and inland
temps warmed 3 to 6 degrees as warmer air aloft pushed into the
area. The 850 temps at klax rose 3 degrees c in the last 24 hours
while the 950 temps were unchanged.

Mondays convection is the big forecast question. Looking forward
to the 00z run of the ec to see if it bends towards the active
fcst of the GFS nam or continues dry.

Short term (sat-tue)
high pressure aloft centered over oklahoma will continue to weaken
and recenter over the southwest united states through early next
week. 500 mb heights will fall into Monday as a weak trough of
low pressure near 37n and 130w approaches the north coast of
california. Onshore flow will increase later today and the marine
layer should deepen slightly tonight and into Sunday. Night
through morning stratus clouds should penetrate a little farther
into the valley areas late tonight or early Sunday morning. As a
result, a cooling trend will take shape into Sunday, best along
the coastal areas.

The forecast gets a little more complicated on late Sunday as
monsoonal moisture moves northwest into southern california. Model
solutions are in good agreement that a decent monsoonal surge will
take place over southern california through Monday night, then
start to dry out between late Monday night and Tuesday night. The
marine layer stratus forecast will get difficult and low
confidence should placed in the cloud cover forecast between
Sunday night and Tuesday night as the moisture moves into the
region. Pops have been bumped up accordingly as convective showers
and thunderstorms could spill over into the coastal and valley
areas on Monday and Monday night. Precipitable water values
increase to near 1.50-2.00 inches by Monday afternoon. 850-700 mb
dewpoints and mixing ratios remain favorable supporting pops at
this time across the area.

The air mass should start to dry out as drier southwest flow
entrains into the air mass on Tuesday. Convective shower activity
should become confined to the mountains and desert on Tuesday and
Tuesday night. Pops have been pretty much untouched for this
period.

Long term (wed-sat)
ridging aloft to the east of the region will wobble west through
Thursday, then strengthen across the desert southwest. A warming
trend should take place for the latter half of next week. The
marine layer depth will shrink and onshore flow will weaken as
subsidence aloft presses down on top of the marine layer. 500 mb
heights increase and 1000-500 mb thickness values climb into late
week. Monsoonal activity will likely remain east of the area for
Wednesday through Friday.

The developing story could be tropical depression nine-e currently
off the mexican coast near 10n and 99w. This tropical system is
expected to become more developed over the next several days,
possibly becoming a hurricane on Monday. While this system has a
moderately-high probability of producing high surf and strong rip
currents for southern california beaches as early as next Friday,
there is still the possibility, albeit lower that remnant
moisture associated with the tropical system could move north into
the southwest united states next weekend and into the following
week. Stay tuned as this developing system could be the main
weather story.

Aviation 23 06z
at 05z at klax... The inversion was around 900 feet. The top of
the inversion was around 4500 feet with a temperature of about 29
degrees celsius.

Overall... Moderate confidence in the current coastal and coastal
adjacent tafs and high confidence elsewhere. Ifr MVFR conditions
will return to most coastal locations through 09z with the
exception of kcma where these conditions will develop closer to
12z. Ksmx will have vlifr lifr conditions at times 08z-15z.

Conditions will clear toVFR between 18z-20z then similar
conditions and timing will return to the region after 24 04z.

There is a thirty five percent chance of ifr MVFR conditions at
kbur and kvny 11z-17z. Otherwise and elsewhereVFR conditions will
prevail.

Klax... Moderate confidence in the current taf. Ifr MVFR conditions
will impact the terminal 09z-19z. Similar conditions will return
after 24 08z. OtherwiseVFR conditions will prevail. East winds
greater than 7 knots are not expected.

Kbur... Moderate confidence in the current taf. There is a thirty
five percent chance of MVFR conditions 11z-17z. OtherwiseVFR
conditions will prevail.

Marine 22 800 pm...

for the coastal waters, good confidence in current forecast.

Winds and seas are expected to remain below small craft advisory
(sca) levels through Thursday. There will be a slight chance of
thunderstorms Monday afternoon and evening across the entire
coastal waters.

A long period south-southeast swell from a forecasted hurricane
in the eastern pacific is expected to spread across the coastal
waters next Friday through the weekend.

Beaches 22 230 pm.

Significant surf conditions may impact the southern california
beaches late next week. A tropical cyclone developing off the
mexican coast will generate a long period southeasterly swell
across the coastal waters beginning next Friday and continuing
through the weekend. This swell will likely generate high surf and
strong rip currents on south facing beaches.

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

Pz... None.

Hazard potential outlook (tue-sat)
a developing monsoonal flow pattern will continue chances of
showers and thunderstorm across the mountains and desert Tuesday.

A significant surf event could develop as early as Friday as
swells from what could become tropical cyclone hilary arrive at
southern california beaches. High surf and strong rip currents
could develop Friday, possibly peaking over the weekend.

Public... Hall
aviation... Kj
marine... Gomberg
beaches... Thompson hall
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 21 mi51 min SW 1.9 G 4.1 67°F 73°F1012.6 hPa (+1.1)
PSXC1 34 mi51 min N 4.1 G 5.1
PXAC1 34 mi51 min NNW 4.1 G 5.1
BAXC1 34 mi51 min NNW 5.1 G 6
46221 - Santa Monica Bay, CA (028) 34 mi51 min 72°F3 ft
PFXC1 36 mi51 min SW 2.9 G 5.1 71°F
PFDC1 36 mi51 min SW 1 G 1.9
PRJC1 37 mi51 min SW 7 G 8
OHBC1 - 9410660 - Los Angeles, CA 37 mi51 min 69°F1012.5 hPa (+1.3)
AGXC1 38 mi51 min WSW 5.1 G 6 69°F 1012.4 hPa (+1.3)
46256 39 mi59 min 71°F3 ft
46222 - San Pedro, CA (092) 44 mi51 min 71°F3 ft
46253 48 mi51 min 71°F3 ft

Wind History for Santa Monica, CA
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Burbank - Bob Hope Airport, CA6 mi58 minESE 710.00 miFair74°F61°F64%1011.1 hPa
Los Angeles, Whiteman Airport, CA7 mi3.9 hrsESE 710.00 miClear77°F60°F57%1012.5 hPa
Van Nuys, Van Nuys Airport, CA12 mi60 minESE 710.00 miFair73°F60°F64%1011.3 hPa
Los Angeles / USC Campus Downtown, CA17 mi64 minN 010.00 miFair70°F62°F76%1012 hPa
El Monte, CA18 mi4 hrsno data10.00 miFair77°F62°F61%1011.5 hPa
Santa Monica, Santa Monica Municipal Airport, CA18 mi60 minSSW 310.00 miFair68°F64°F87%1012.3 hPa
Los Angeles, Los Angeles International Airport, CA23 mi58 minWSW 610.00 miFair68°F63°F84%1012.1 hPa
Hawthorne, Hawthorne Municipal Airport, CA23 mi58 minWNW 310.00 miFair69°F63°F81%1012.3 hPa

Wind History from BUR (wind in knots)
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Last 24hrSE5E5E4E4E4CalmCalmS3SE3SE545CalmS6S9S10S10S10S10S10SE10SE7SE8SE7
1 day agoE7E6SE4NE3S3S3E4SE4SE3SE4SE66S5SW6S6S8S9S9S9S8S6SE7SE6E7
2 days agoE7SE4E3SE5SE4E4CalmE4SE5SE4E7SE66S9S9S8S9S8S10S8S7SE6SE6E5

Tide / Current Tables for Santa Monica, Municipal Pier, California
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Santa Monica
Click for Map
Sun -- 02:47 AM PDT     New Moon
Sun -- 04:15 AM PDT     -1.41 feet Low Tide
Sun -- 05:59 AM PDT     Sunrise
Sun -- 06:18 AM PDT     Moonrise
Sun -- 10:40 AM PDT     4.46 feet High Tide
Sun -- 03:43 PM PDT     1.57 feet Low Tide
Sun -- 08:01 PM PDT     Sunset
Sun -- 08:24 PM PDT     Moonset
Sun -- 09:54 PM PDT     6.90 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
4.12.20.5-0.8-1.4-1.2-0.312.43.64.34.443.22.31.71.62.13.14.45.76.66.96.4

Tide / Current Tables for Santa Monica, California
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Santa Monica
Click for Map
Sun -- 02:47 AM PDT     New Moon
Sun -- 04:15 AM PDT     -1.38 feet Low Tide
Sun -- 05:59 AM PDT     Sunrise
Sun -- 06:18 AM PDT     Moonrise
Sun -- 10:40 AM PDT     4.50 feet High Tide
Sun -- 03:43 PM PDT     1.60 feet Low Tide
Sun -- 08:01 PM PDT     Sunset
Sun -- 08:24 PM PDT     Moonset
Sun -- 09:54 PM PDT     6.94 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
4.12.30.5-0.8-1.4-1.2-0.312.53.64.44.543.22.41.71.62.13.14.45.76.66.96.5

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 (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.