Wednesday, April25, 2018 L-36.com


Marine Weather and Tides
Los Osos, 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 6:15AMSunset 7:45PM Wednesday April 25, 2018 11:14 AM PDT (18:14 UTC) Moonrise 2:32PMMoonset 3:03AM Illumination 79% Phase: Waxing Gibbous; Moon at 10 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
    EDIT      (on/off)   Help
PZZ645 Point Piedras Blancas To Point Sal Westward Out To 10 Nm- 833 Am Pdt Wed Apr 25 2018
Today..Winds variable 10 kt or less, becoming W 10 kt in the afternoon. Wind waves 2 ft or less. NW swell 5 to 6 ft at 15 seconds.
Tonight..NW winds 5 to 10 kt. Wind waves 2 ft or less. NW swell 5 to 6 ft at 14 seconds.
Thu..NW winds 10 to 15 kt. Wind waves 2 ft or less. Mixed swell nw 4 to 5 ft at 13 seconds and S 3 ft at 15 seconds.
Thu night..NW winds 10 to 15 kt. Wind waves 2 ft or less. Mixed swell nw 4 to 5 ft at 13 seconds and S 3 ft at 15 seconds.
Fri..N winds 5 to 10 kt, becoming nw 15 to 20 kt with gusts to 25 kt in the afternoon. Wind waves 1 to 3 ft. Mixed swell nw 4 ft at 11 seconds and S 3 ft at 15 seconds.
Fri night..NW winds 10 to 20 kt with gusts to 25 kt in the evening, becoming 10 to 15 kt. Wind waves 2 to 4 ft. Mixed swell nw 4 to 5 ft at 11 seconds and S 3 ft at 15 seconds.
Sat..NW winds 15 to 25 kt with gusts to 30 kt. Combined seas 7 to 9 ft.
Sun..NW winds 15 to 25 kt with gusts to 30 kt. Combined seas 7 to 9 ft.
PZZ600 833 Am Pdt Wed Apr 25 2018
Synopsis for the southern california coast and santa barbara channel including the channel islands national marine sanctuary and national park..At 15z...or 8 am pdt...a 1035 mb surface high was about 500 nm south-southwest of point conception, while a 1013 mb low was near yuma az.

7 Day Forecast for Marine Location Near Los Osos, CA
   Hourly   EDIT   Help
location: 35.33, -120.84     debug


Area Discussion for - Los Angeles/Oxnard, CA
      (on/off)   Help   NOTE: mouseover dotted underlined text for definition
Fxus66 klox 251626
afdlox
area forecast discussion
national weather service los angeles oxnard ca
926 am pdt Wed apr 25 2018

Synopsis 25 316 am.

A trough of low pressure will approach the west coast through
Friday before settling over the region through early next week.

This will result in a gradual cooling trend with increasing night
to morning low clouds through Friday. Near normal temperatures
will continue into early next week.

Short term (tdy-fri) 25 925 am.

Low clouds have already exited the la coastal areas except for
palos verdes and fog is rapidly dissipating north of paso robles.

Low clouds and patchy fog are rather entrenched along the central
coast and the ventura county coast so these areas will be slowest
to burn off today. Onshore pressure gradients are rather standard
for this type of pattern and expected to peak at 7mb this
afternoon from lax-dag. Locally gusty southwest winds to 45 mph
will be likely in the foothills and western areas of the antelope
valley today, but not enough to maintain wind advisory criteria so
have canceled that for today. Gradients shoot up over 9mb on
Thursday and MOS supports sustained winds of 20kt in lancaster
tomorrow which is more capable of reaching advisory levels then.

Remainder of the forecast remains on-track with warm inland
temperatures and cool coastal temperatures today.

***from previous discussion***
latest satellite imagery shows low clouds behaving just about as
expected for once, with clouds socked into all coastal areas and
now working into lower valleys. Patchy fog is likely across many
valley locations this morning. An upper level low pressure system
is also visible on satellite, about 1000 miles west of the region.

This system is expected to meander well off the coast today
before pushing east into the norcal coast Friday. Increasing
onshore flow and night to morning clouds is expected through early
Friday as a result of the approaching system. However, cooler air
aloft with the system will likely weaken the marine layer
inversion enough to wipe out low clouds north of point conception
Friday night. The increasing marine influence combined with h5
heights lowering from around 580 dm today to around 574 dm Friday
will support a continued gradual cooling trend away from the
coast. Patchy drizzle is possible (though left out of the forecast
for now) across eastern la county due to the deepening marine
layer and a vort MAX moving overhead early Friday. An advisory
level sundowner is likely for the sba south coast from goleta to
gaviota Thursday evening, with a more widespread and possibly
stronger sundowner expected Friday evening and night (with gfs
indicating both sba- smx and sba- smx around -5). Advisory level
northwest winds are also possible Friday evening and night in the
mountains near the i-5 corridor and western antelope valley.

Long term (sat-tue) 25 357 am.

Above average confidence in the forecast exists through this
weekend with below average confidence for early next week.

Northerly and likely advisory level winds may continue at times
through early next week for wind prone mountain and foothill
locations. Advisory level winds may surface in wind prone valleys
at times during this period, especially for santa clarita and san
fernando valleys. The gusty offshore flow and cold air advection
will help to vastly reduce if not completely eliminate night to
morning low clouds across the region. However, the current
forecast hangs onto some low clouds for la county with the
potential for an eddy which would help combat the offshore flow.

A second piece of upper level energy may help to reinforce the
trough of low pressure overhead early next week. This will keep
near to below normal temperatures across the region during this
time with gusty winds possible, especially across the mountains.

There is also a non- zero change for rain sometime early next
week, however given the time of year and continued inconsistency
in model runs, have kept pops below mentionable levels for now.

Aviation 25 0704z.

At 0230z at klax, the marine layer was near 1000 feet deep. The
top of the inversion was near 2300 feet with a temperature around
19 c.

Moderate confidence in tafs. There is a 30 percent chc that lifr
cigs may be ifr and vice versa.VFR transitions could be off by
+ - 90 minutes. Good confidence in tafs 20z-02z.

Klax... Moderate confidence in taf. There is a 20 percent chc of
lifr CIGS 11z-15z.VFR transition may be as late as 20z.

Kbur... Moderate confidence in TAF from 10z-17z, otherwise very
good confidence in taf. There is a 30 percent chance of lifr cigs
12z-16z. There is a 20 percent chc of no cigs.

Marine 25 258 am.

High confidence in winds and seas remaining below small craft
advisory levels across the waters through Wednesday. Winds will
likely increase Thursday afternoon through Saturday with at least
strong advisory level winds and possible gale force gusts along
with building short period seas.

Lox watches warnings advisories
Ca... None.

Pz... None.

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

Public... Boldt munroe
aviation... Rorke
marine... Rorke
synopsis... Rm
weather.Gov losangeles


Weather Reporting Stations
   EDIT       (on/off)   Help   NOTE: Click on distance to see the station location on a map
Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
46215 - Diablo Canyon, CA (076) 9 mi48 min 52°F4 ft
PSLC1 - 9412110 - Port San Luis, CA 12 mi45 min NNW 2.9 G 4.1 51°F 55°F1020.6 hPa
CPXC1 12 mi29 min Calm G 1.9 51°F 1020.6 hPa49°F
46011 - SANTA MARIA - 21 NM Northwest of Point Arguello, CA 28 mi85 min N 1.9 G 3.9 53°F 55°F7 ft1019.6 hPa (+1.7)

Wind History for Port San Luis, CA
(wind in knots)    EDIT      (on/off)   Help
12
PM
1
PM
2
PM
3
PM
4
PM
5
PM
6
PM
7
PM
8
PM
9
PM
10
PM
11
PM
12
AM
1
AM
2
AM
3
AM
4
AM
5
AM
6
AM
7
AM
8
AM
9
AM
10
AM
11
AM
Last
24hr
S7
S4
G7
SW11
G14
W13
G16
W11
G16
SW13
G17
W14
G17
W8
G12
NW1
SE1
G5
SW2
--
N2
SW4
SW1
E3
N4
SW1
E3
S2
SE1
S4
E3
NE2
1 day
ago
E2
G5
S10
SW12
G15
W11
G14
SW7
G10
W11
W6
G9
W2
G6
NE5
E6
SE2
SW3
NW1
SW1
G4
S3
S3
N2
NE2
N4
SE3
NW1
S2
S4
S4
2 days
ago
E1
NE2
NE3
S2
N3
SE4
SE2
S2
G5
E7
SW2
W2
W2
NW1
--
--
--
NW1
S1
NE1
SE4
S3
G6
N3
SE1
SE1
G4

Airport Reports
    EDIT      (on/off)   Help   Click EDIT to display multiple airports
AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
San Luis Obispo, San Luis Obispo County-Mc Chesney Field, CA12 mi79 minE 410.00 miOvercast53°F48°F86%1019.5 hPa

Wind History from SBP (wind in knots)
12
PM
1
PM
2
PM
3
PM
4
PM
5
PM
6
PM
7
PM
8
PM
9
PM
10
PM
11
PM
12
AM
1
AM
2
AM
3
AM
4
AM
5
AM
6
AM
7
AM
8
AM
9
AM
10
AM
11
AM
Last 24hrCalm4NW74NW10NW10NW9NW11NW8NW6NW6NW4NW53W3NW4W4CalmNW3CalmW4CalmE4S3
1 day agoSE53SW6W8NW10NW9NW9NW10NW5NW3NW3W3NW6NW4NW4CalmW3NW4S5CalmCalmW3CalmSW4
2 days agoNW9NW11NW14NW19NW13NW9NW14W7NW6CalmSE4CalmW4NW4NW4N3CalmCalmCalmE4SE4CalmCalmE6

Tide / Current Tables for Morro Bay, California
   EDIT   RT Ports Option   Weekend mode (on/off)   (on/off)   Help   One Week of Data
Morro Bay
Click for Map
Wed -- 02:10 AM PDT     1.67 feet Low Tide
Wed -- 04:02 AM PDT     Moonset
Wed -- 06:18 AM PDT     Sunrise
Wed -- 07:41 AM PDT     3.97 feet High Tide
Wed -- 02:40 PM PDT     0.21 feet Low Tide
Wed -- 03:32 PM PDT     Moonrise
Wed -- 07:44 PM PDT     Sunset
Wed -- 09:06 PM PDT     4.00 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
2.41.91.71.82.32.93.53.93.93.73.12.41.60.80.30.20.61.42.33.13.843.93.4

Tide / Current Tables for Port San Luis, Pacific Ocean, California
   EDIT      (on/off)   Help   One Week of Data
Port San Luis
Click for Map
Wed -- 01:27 AM PDT     1.61 feet Low Tide
Wed -- 04:02 AM PDT     Moonset
Wed -- 06:18 AM PDT     Sunrise
Wed -- 07:09 AM PDT     4.51 feet High Tide
Wed -- 01:47 PM PDT     -0.32 feet Low Tide
Wed -- 03:32 PM PDT     Moonrise
Wed -- 07:44 PM PDT     Sunset
Wed -- 08:23 PM PDT     4.77 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
21.71.72.12.83.64.24.54.33.72.71.60.5-0.1-0.30.112.13.34.24.74.74.13.2

Weather Map and Satellite Images
       (on/off)   HelpWeather Map
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.
Link to Loop

Other links: Northern Pacific     Contential US     Full GOES-East
Wind Forecast for Los Angeles/Oxnard, CA (14,3,4,5)
      (on/off)   Help

Ground Weather Radar Station Vandenberg AFB, CA
   (on/off)   Help
weather_mapweather_map weather_map

Ad by Google

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.