Saturday, April21, 2018 L-36.com


Marine Weather and Tides
Avilla Beach, CA

Version 3.4
What's New / NOTES
3/3/2018 - There is a new GOES Satellite for the east coast that required rewriting that part of the code. Please report any issues.
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.

Sunrise 6:19AMSunset 7:41PM Saturday April 21, 2018 12:27 AM PDT (07:27 UTC) Moonrise 10:14AMMoonset 12:00AM Illumination 34% Phase: Waxing Crescent; Moon at 6 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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PZZ670 Point Piedras Blancas To Point Sal From 10 To 60 Nm- 817 Pm Pdt Fri Apr 20 2018
.small craft advisory in effect through late Saturday night...
Tonight..NW winds 15 to 25 kt. Combined seas 7 to 9 ft dominant period 9 seconds. Patchy dense fog with vsby 1 nm or less after midnight.
Sat..NW winds 10 to 20 kt with gusts to 25 kt. Strongest western portion. Combined seas 8 to 10 ft dominant period 16 seconds. Patchy fog in the morning.
Sat night..NW winds 15 to 25 kt with gusts to 30 kt. Strongest western portion. Combined seas 9 to 10 ft dominant period 15 seconds.
Sun..NW winds 10 to 20 kt with gusts to 25 kt. Wind waves 2 to 4 ft. NW swell 8 to 9 ft at 14 seconds.
Sun night..NW winds 10 to 20 kt with gusts to 25 kt. Wind waves 2 to 4 ft. NW swell 8 to 9 ft at 13 seconds.
Mon..NW winds 15 to 20 kt, becoming 10 to 15 kt in the afternoon. Wind waves 2 to 3 ft. NW swell 7 to 8 ft at 13 seconds.
Mon night..NW winds 10 to 15 kt, becoming 5 to 10 kt after midnight. Wind waves 2 ft or less. NW swell 7 to 8 ft at 13 seconds.
Tue..NW winds 5 to 10 kt. Wind waves 2 ft or less. NW swell 6 to 7 ft.
Wed..W winds 5 to 10 kt. Wind waves 2 ft or less. NW swell 7 to 8 ft.
PZZ600 817 Pm Pdt Fri Apr 20 2018
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 1033 mb surface high was centered 600 nm west of eureka, with a weak inverted trough along the sw california coast. The high will push inland over the pac nw through the weekend while thermal low pres sets up over the four corners region.

7 Day Forecast for Marine Location Near Avilla Beach, CA
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location: 35.17, -120.74     debug


Area Discussion for - Los Angeles/Oxnard, CA
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Fxus66 klox 210410
afdlox
area forecast discussion... Updated
national weather service los angeles oxnard ca
910 pm pdt Fri apr 20 2018

Synopsis 20 508 pm.

A high pressure system will bring above normal temperatures
away from the coast through Monday. Closer to the coast, a
coastal eddy will usher in night through morning low clouds and
fog. A low pressure system should arrive Tuesday for increasing
onshore flow and a cooling trend through the remainder of the work
week.

Short term (fri-mon) 20 909 pm.

The latest satellite imagery shows an upper-level ridge of high
pressure building into central california this evening and a
farther upstream trough about 400 miles west of seattle. A weak
upper-level trough sits near 27n and 128w, or about 700 miles
southwest of los angeles.

Ridging aloft will remain in place through Saturday and onshore
flow will weaken through Saturday, possibly turning weakly
offshore later tonight. A warming trend will take place on
Saturday, especially away from the coast. Much of the warming near
the coast will depend how much marine intrusion takes place into
Saturday morning. There is a chance that temperatures near the
beaches could be a tad too warm Saturday. Fog product imagery
does not look particularly impressive, but some semblance of
marine layer stratus is present giving some confidence in the
overall stratus forecast through Saturday.

The trough of low pressure to the southwest of the area will move
northeast into the southern california on Saturday afternoon,
while the trough to the northwest phases and fills in behind it.

A cooling trend should develop for Sunday and Monday. Below
normal temperatures and a persistent marine layer should remain
in place for early next week.

*** from previous discussion ***

Long term (tue-fri) 20 158 pm.

Models seem to have settled down on a solution for next week,
keeping the upper low well west of the coast through at least the
middle of the week, then lifting it northeast into the pac nw
Friday night into Saturday. This will keep some ridging along the
coast going through mid week at least, however onshore flow
strengthens slightly each day. So it looks like the marine layer
should be a consistent feature for coast and coastal valleys next
week with temps near to slightly above normal. A strong onshore
push will likely cool temps to below normal by the end of the week
with some gusty winds in the antelope valley.

Aviation 21 0003z.

At 22z, the marine layer depth was around 1800 feet deep at klax.

The top of the inversion was near 2500 feet with a temperature
around 17 degrees celsius.

Moderate-to-high confidence in the current forecast. High
confidence in timing, moderate confidence in flight categories.

North of point conception...VFR conditions are expected through
at least 03z, then there is a chance of lifr to ifr conditions at
coastal terminals through 10z.VFR conditions are expected
throughout the remainder of the period.

South of point conception...VFR conditions are expected through
at least 08z, then there is a chance of ifr to MVFR conditions at
coastal terminals through 16z. The highest chance of sub-vfr
conditions is expected at los angeles county coastal terminals.

There is a very slight chance that MVFR conditions could linger at
coastal terminals through Saturday afternoon.

Klax...VFR conditions are expected through at least 08z, or as
late as 13z. Then, there is a 60 percent chance of ifr to MVFR
conditions through 16z. There is a 10 percent chance that MVFR
conditions could linger through 20z.

Kbur...VFR conditions are expected throughout the period, except
for 10 percent chance of ifr to MVFR conditions between 13z and
15z.

Marine 20 745 pm.

Low confidence in the fog forecast, but dense fog is possible now
through the weekend. High confidence in widespread short period
seas tonight, caused by gusty northwest winds over the outer
waters. The seas should
high confidence in small craft advisory (sca) winds from the
central coast to san nicolas island through tonight, with weaker
and more borderline SCA over the outer waters through the
weekend. Over the inner waters from the santa barbara channel to
the san pedro channel, SE winds will form each morning, up to 15
kt through the passages and channels, with accompanying choppy
seas. Typical onshore winds expected in the afternoon, with near-
sca west winds in the far western santa barbara channel.

Lox watches warnings advisories
Ca... None.

Pz... Small craft advisory in effect until 3 am pdt Saturday for
zones 645-676. (see laxmwwlox).

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

Hazard potential outlook (mon-fri)
No significant hazards expected.

Public... Hall mw
aviation... Hall
marine... Kittell smith
synopsis... Stu hall
weather.Gov losangeles


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
CPXC1 0 mi26 min N 2.9 G 5.1 51°F 1021.5 hPa47°F
PSLC1 - 9412110 - Port San Luis, CA 1 mi40 min NNW 1 G 4.1 51°F1021.6 hPa
46215 - Diablo Canyon, CA (076) 7 mi31 min 52°F6 ft
46011 - SANTA MARIA - 21 NM Northwest of Point Arguello, CA 21 mi38 min NW 12 G 16 54°F 53°F8 ft1021.2 hPa (+0.8)
PTGC1 - Point Arguello, CA 41 mi28 min N 21 G 23 52°F 1020.6 hPa (-0.6)
HRVC1 49 mi40 min 1020.5 hPa

Wind History for Port San Luis, CA
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
San Luis Obispo, San Luis Obispo County-Mc Chesney Field, CA7 mi32 minNW 47.00 miFair50°F48°F93%1020.8 hPa
Santa Maria Public Airport/Capt G Allan Hancock Field, CA24 mi37 minS 36.00 miFog/Mist49°F46°F93%1021.3 hPa

Wind History from SBP (wind in knots)
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Last 24hrW5E4CalmE3CalmCalmCalmSE4CalmNW10NW12NW14NW16NW16NW21NW20NW18NW18NW13NW12NW10NW5NW4NW4
1 day agoE3CalmCalmCalmE5CalmCalmNW7NW10NW7W9NW12NW15NW19
G24
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2 days ago3E3CalmE3E4E4SE4CalmSE3NW4W43NW19N15NW17NW15NW15NW13
G20
NW12NW7W3CalmCalmSE3

Tide / Current Tables for Avila, California
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Avila
Click for Map
Sat -- 12:49 AM PDT     Moonset
Sat -- 01:46 AM PDT     2.52 feet High Tide
Sat -- 06:23 AM PDT     Sunrise
Sat -- 09:16 AM PDT     -2.96 feet Low Tide
Sat -- 11:14 AM PDT     Moonrise
Sat -- 04:12 PM PDT     1.03 feet High Tide
Sat -- 07:40 PM PDT     Sunset
Sat -- 08:52 PM PDT     -0.18 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
1.92.42.52.21.50.4-0.7-1.8-2.6-2.9-2.8-2.3-1.5-0.50.30.810.90.60.2-0.1-0.2-00.4

Tide / Current Tables for Morro Bay, California
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Morro Bay
Click for Map
Sat -- 12:50 AM PDT     Moonset
Sat -- 02:55 AM PDT     4.61 feet High Tide
Sat -- 06:23 AM PDT     Sunrise
Sat -- 11:00 AM PDT     0.02 feet Low Tide
Sat -- 11:14 AM PDT     Moonrise
Sat -- 05:41 PM PDT     2.88 feet High Tide
Sat -- 07:41 PM PDT     Sunset
Sat -- 09:54 PM PDT     2.49 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
3.544.54.64.43.832.11.30.60.200.20.71.42.12.62.82.92.82.62.52.52.6

Weather Map and Satellite Images
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wmap_P
GOES Local Image of Southwest    EDIT
NOTE: East coast views moved to GEOS-16. They are experimental and not well supported by NOAA so they may not be correct so be warned. This change required redoing a large amount of the GOES code. If the image you are expecting is not showing, please let me know. You may need to use the EDIT function to update your location.
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Wind Forecast for Los Angeles/Oxnard, CA (3,6,7,8)
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Ground Weather Radar Station Vandenberg AFB, 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.