Monday, April23, 2018 L-36.com


Marine Weather and Tides
Cayucos, 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 6:17AMSunset 7:44PM Monday April 23, 2018 2:39 AM PDT (09:39 UTC) Moonrise 12:22PMMoonset 1:38AM Illumination 56% Phase: First Quarter Moon; Moon at 8 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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PZZ645 Point Piedras Blancas To Point Sal Westward Out To 10 Nm- 818 Pm Pdt Sun Apr 22 2018
Tonight..NW winds 10 to 15 kt. Wind waves 2 ft or less. NW swell 5 to 7 ft at 13 seconds. Areas of dense fog with vsby 1 nm or less after midnight.
Mon..Winds variable 10 kt or less, becoming nw 10 kt in the afternoon. Wind waves 2 ft or less. NW swell 4 to 6 ft at 13 seconds. Areas of dense fog with vsby 1 nm or less in the morning.
Mon night..NW winds 10 to 15 kt in the evening, becoming 5 to 10 kt. Wind waves 2 ft or less. NW swell 3 to 5 ft at 12 seconds. Areas of fog after midnight.
Tue..Winds variable 10 kt or less, becoming W 10 to 15 kt in the afternoon. Wind waves 2 ft or less. NW swell 3 to 5 ft at 12 seconds. Areas of fog in the morning.
Tue night..NW winds 10 to 15 kt in the evening, becoming 5 to 10 kt. Wind waves 2 ft or less. NW swell 4 to 6 ft at 15 seconds. Patchy fog after midnight.
Wed..Winds variable 10 kt or less, becoming W 10 kt in the afternoon. Wind waves 2 ft or less. NW swell 4 to 6 ft. Patchy fog in the morning.
Wed night..W winds 10 to 15 kt in the evening, becoming variable 10 kt or less. Wind waves 2 ft or less. NW swell 4 to 6 ft. Patchy fog after midnight.
Thu..NW winds 15 to 20 kt. Combined seas 4 to 6 ft. Patchy fog.
Fri..W winds 15 to 20 kt. Combined seas 4 to 6 ft. Patchy fog.
PZZ600 818 Pm Pdt Sun Apr 22 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 1026 mb surface high was over the pac nw and a 1008 mb low was over southern nevada. A trough of low pressure was along the southern california coast. A shallow marine inversion may bring patchy dense fog across the coastal waters later tonight into Mon morning.

7 Day Forecast for Marine Location Near Cayucos, CA
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location: 35.43, -120.88     debug


Area Discussion for - Los Angeles/Oxnard, CA
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Fxus66 klox 230729
afdlox
area forecast discussion... Updated
national weather service los angeles oxnard ca
1229 am pdt Mon apr 23 2018

Synopsis 22 901 pm.

There will be overnight and morning coastal low clouds and fog
for several days this coming week otherwise conditions will be
warm and dry. Temperatures will cool a bit Friday and Saturday as
a weak weather system moves across the region.

Short term (mon-thu) 22 900 pm.

Weak upper-level ridging remains over the area this evening and
will continue to linger into Monday. Despite 500 mb heights
climbing slightly, onshore flow is progged to and is strengthening
tonight as southwest flow aloft establishes. 950 mb temperatures
should cool slightly and allowing for a cooling trend to continue
into Monday. Ridging aloft will gradually break down through
Monday night. A disturbance near 40n and 150w is slated to break
off of a trough in the gulf of alaska Monday, then this trough
will slowly move towards the california coast through late this
week.

Onshore flow should gradually increase through this week,
continuing a cooling trend and a more persistent marine layer and
better organized marine layer stratus. A shallow marine layer
depth this evening could bring patchy dense fog to the coast
tonight, but the marine layer depth should deepen overnight
allowing for less dense fog on Monday morning. Some intrusion is
possible into the lower valley areas late tonight and early
Monday morning.

*** from previous discussion ***

Long term (fri-mon) 22 125 pm.

Large upper level low pressure system will be spinning off the
northern california coast by Thursday. Latest 12z GFS model
trending further northward (similar to ECMWF model) with moving
this low pressure system inland Friday night into Saturday.

As a result, keeping pops below 15 percent in the Friday
night Saturday time frame seems reasonable for now across our
area, as most of the moisture and energy with this system is
projected to remain well north. Also of note, the latest gfs
ensembles also trending much drier with this system for our
area. The main impact of this system will be gusty west to
northwest winds across the region along with a cooling trend.

Aviation 23 0600z.

At 06z at klax, the marine layer was 700 feet deep. The top of
the inversion was near 2400 feet with a temperature near 23 c,
low confidence in coastal TAF (high confidence in the inland tafs)
at the coast stratus will form haphazardly. There is a 30 percent
chc of 1 4sm fg from 10z-16z at all coastal sites. CIGS and vis
may bounce between lifr and ifr levels. There is a 20 percent chc
of no clearing at all.

Klax... Low confidence in taf. There is a 30 percent chc of 1 4sm
fg from 10z-16z. CIGS and vis may bounce between lifr and ifr
levels. There is a 20 percent chc of no afternoon clearing.

Kbur... Good confidence in the taf, except for a 20 percent chance
of MVFR visibility between 12z and 16z.

Marine 22 742 pm.

Generally high confidence in the current forecast. Gusty NW winds
to small craft advisory (sca) level are expected over outer water
zone pzz670 through late tonight. Otherwise, winds and seas are
expected to remain largely below small craft advisory (sca) levels
tonight through Thursday across the coastal waters. There is a
50%-60% chance of SCA winds developing on Fri for much of the
coastal waters.

A shallow marine inversion may generate some patchy dense fog
later tonight into Monday morning across the coastal waters.

Lox watches warnings advisories
Ca... None.

Pz... Small craft advisory in effect until 3 am pdt early this
morning for zone 670. (see laxmwwlox).

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

Public... Hall gomberg
aviation... Rorke
marine... Smith
synopsis... Kj
weather.Gov losangeles


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
46215 - Diablo Canyon, CA (076) 16 mi42 min 54°F6 ft
PSLC1 - 9412110 - Port San Luis, CA 19 mi57 min NNW 1 G 2.9 52°F 56°F1015.2 hPa
CPXC1 19 mi37 min N 2.9 G 4.1 50°F 1015.1 hPa48°F
46011 - SANTA MARIA - 21 NM Northwest of Point Arguello, CA 34 mi49 min NW 9.7 G 12 54°F 53°F7 ft1014.6 hPa (-0.4)

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, CA18 mi43 minNW 40.25 miFog51°F50°F96%1014.2 hPa
Paso Robles Municipal Airport, CA22 mi46 minN 010.00 miFair51°F43°F74%1014 hPa

Wind History from SBP (wind in knots)
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Last 24hrCalmSE3CalmCalmCalmCalmCalmNW5NW6NW9NW11NW14NW19NW13NW9NW14W7NW6CalmSE4CalmW4NW4NW4
1 day agoSW4E5SE3CalmCalmCalmN3CalmNW7NW6W6NW14NW12NW13NW15NW13NW7W5CalmNW3CalmCalmSE4Calm
2 days agoCalmE3CalmCalmCalmSE4CalmNW10NW12NW14NW16NW16NW21NW20NW18NW18NW13NW12NW10NW5NW4NW4CalmCalm

Tide / Current Tables for Morro Beach, Estero Bay, California
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Morro Beach
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Mon -- 02:37 AM PDT     Moonset
Mon -- 05:03 AM PDT     4.29 feet High Tide
Mon -- 06:20 AM PDT     Sunrise
Mon -- 12:26 PM PDT     -0.24 feet Low Tide
Mon -- 01:22 PM PDT     Moonrise
Mon -- 07:26 PM PDT     3.88 feet High Tide
Mon -- 07:43 PM PDT     Sunset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
2.52.83.23.74.14.34.13.62.81.910.2-0.2-0.20.311.92.83.53.83.83.532.5

Tide / Current Tables for Avila, California
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Avila
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Mon -- 02:36 AM PDT     Moonset
Mon -- 04:02 AM PDT     2.00 feet High Tide
Mon -- 06:20 AM PDT     Sunrise
Mon -- 11:28 AM PDT     -2.85 feet Low Tide
Mon -- 01:22 PM PDT     Moonrise
Mon -- 06:28 PM PDT     1.46 feet High Tide
Mon -- 07:42 PM PDT     Sunset
Mon -- 11:48 PM PDT     -0.36 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
0.20.71.31.821.81.30.4-0.6-1.6-2.4-2.8-2.8-2.3-1.5-0.50.41.11.41.41.10.60.1-0.3

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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Other links: Northern Pacific     Contential US     Full GOES-East
Wind Forecast for Los Angeles/Oxnard, CA (5,6,7,8)
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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.