Thursday, April27, 2017 L-36.com


Marine Weather and Tides
Los Osos, CA

Version 3.4
What's New / NOTES
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.
3/12/2015 - Added section for Gulf current for users in the GMZ marine zones.
This was requested by a user. If you have requests, please let me know.

Sunrise 6:12AMSunset 7:47PM Thursday April 27, 2017 9:54 AM PDT (16:54 UTC) Moonrise 6:28AMMoonset 8:25PM Illumination 3% Phase: Waxing Crescent; Moon at 2 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- 909 Am Pdt Thu Apr 27 2017
.gale warning in effect through late Friday night...
Today..NW winds 20 to 30 kt with gusts to 40 kt. Combined seas 10 to 12 ft dominant period 8 seconds...building to 12 to 13 ft dominant period 8 seconds in the afternoon. Patchy fog in the morning.
Tonight..NW winds 25 to 30 kt with gusts to 40 kt. Combined seas 13 to 14 ft dominant period 9 seconds.
Fri..NW winds 20 to 30 kt with gusts to 35 kt. Combined seas 11 to 13 ft dominant period 10 seconds.
Fri night..NW winds 15 to 25 kt with gusts to 35 kt. Strongest western portion. Combined seas 11 to 13 ft dominant period 9 seconds...subsiding to 10 to 11 ft dominant period 10 seconds after midnight.
Sat..NW winds 15 to 25 kt with gusts to 30 kt...becoming 10 to 20 kt with gusts to 25 kt in the afternoon. Combined seas 8 to 9 ft dominant period 11 seconds.
Sat night..NW winds 10 to 20 kt with gusts to 30 kt. Wind waves 2 to 4 ft. NW swell 5 to 6 ft at 11 seconds.
Sun..NW winds 15 to 25 kt with gusts to 30 kt. Combined seas 6 to 8 ft.
Mon..NW winds 15 to 25 kt with gusts to 30 kt. Combined seas 9 to 10 ft.
PZZ600 909 Am Pdt Thu Apr 27 2017
Synopsis for the southern california coast and santa barbara channel including the channel islands national marine sanctuary and national park..At 16z...or 9 am pdt... A 1027 mb high was located 700 nm W of point conception and a 1004 mb low was located in az. Widespread gale force winds are expected across the outer water through the end of the week. Across the inner waters...small craft advisory conditions are expected through the end of the week with local gale force gusts possible across western portions of the nearshore waters at times through Fri.

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


Area Discussion for - Los Angeles/Oxnard, CA
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Fxus66 klox 271633
afdlox
area forecast discussion
national weather service los angeles/oxnard ca
933 am pdt Thu apr 27 2017

Synopsis
A high system with offshore flow will bring fair skies... Gusty winds
at times... And above normal temperatures into next week.

Short term (tdy-sat)
still in this strong northwest wind pattern and wind advisories
and warnings continue for most of the same areas. There may be
some decrease later this morning and early afternoon but a
stronger surge is expected tonight into early Friday, especially
for la county.

The 12z NAM continues to show a pretty robust offshore gradient
Saturday and now all the models show the upper low dropping a
little farther west than earlier in the week which will help
provide some upper level support. So confidence growing in a solid
advisory level santa ana event for Saturday across la/ventura
counties along with well above normal temps and low humidities.

***from previous discussion***
the increased north flow should keep any stratus at bay and
Friday will be a sunny day. Slightly higher hgts will translate to
1 to 3 degrees of warming across the board.

The upper level flow turns a little more to the north on Saturday
and more importantly the sfc high moves over nv and switches the
offshore flow from the north to the northeast. This looks like it
will set up moderate santa ana wind event with many advisory
needed for the usual windy during santa ana areas. This thinking
must be tempered with the realization that the mdls have been over
forecasting the winds lately. The northeast push will warm the
coast and vly temps another 3 to 6 degrees. With the exception of
the beaches all of the coasts and vlys will see MAX temps in the
80s and lower 90s.

Long term (sun-wed)
both the GFS and the ec show a very static pattern for the xtnd
period with the state under the eastern edge of a east pac upper
high through Tuesday with hgts around 582dm. On Wednesday the
upper high pushes closer to the coast and hgts climb to 585dm.

There is varying amounts of offshore flow through the period.

Mostly likely enough to keep the low clouds away. MAX temps will
continue to be 6 to 12 degrees above normal through the period
with the actual highs highly dependent on the amount of offshore
flow present on any given day. Several degrees of warming were
added to each day of the extended forecast.

Aviation 27/1010z...

at 1000z, the marine inversion at klax was based around 600 feet.

The top of the inversion was 1600 feet with a temperature of 19
degrees celsius.

Overall, moderate confidence in 12z TAF package. Lifr conditions
will come in and out of ksbp/ksmx/kprb through 18z this morning
withVFR conditions anticipated this afternoon and tonight. South
of point conception, a patch of stratus has developed over the
eastern valleys of la county. There is a 30% chance of ifr
conditions impacting klax/klgb/ksmo through 18z withVFR
conditions anticipated this afternoon and tonight.

Gusty northwest to north winds will continue through the taf
period with the potential for llws/turbulence at coastal and
valley TAF sites through this evening.

Klax... Moderate confidence in 12z taf. There is a 30% chance of
ifr conditions 12z-18z. There is a 30% chance of northerly cross
winds after 22z.

Kbur... High confidence in 12z taf.VFR conditions are anticipated
through the period. There is a 40% chance of llws/turbulence
issues through the TAF period.

Marine 27/900 am.

For the outer waters, high confidence in current forecast. Gale
force winds will continue through Friday night then subside to
small craft advisory (sca) levels Saturday through Monday.

For the inner waters, moderate to high confidence in current
forecast. For the waters north of point sal, SCA level winds will
continue through Friday night before subsiding on Saturday.

However for Sunday and Monday, there is a 60% chance of winds
increasing to SCA levels again. For the waters south of point
conception, SCA level west to northwest winds will continue
through Friday night. From Saturday through Monday, winds are
generally expected to remain below SCA levels. However, there is a
50% chance of SCA level northeast winds Saturday from ventura
south to santa monica.

Due to strong winds throughout the waters, seas will be very
choppy in all areas this week, making for hazardous boating
conditions through the week.

Lox watches/warnings/advisories
Ca... Wind advisory in effect from 1 pm this afternoon to 9 pm pdt
this evening for zones 34-35. (see laxnpwlox).

Wind advisory in effect until 9 am pdt Friday for zones
39-44>46-52-59-547. (see laxnpwlox).

Beach hazards statement in effect through Friday evening for
zones 40-41. (see laxcfwlox).

High wind warning in effect until 9 am pdt Friday for zones
53-54. (see laxnpwlox).

Wind advisory in effect until 3 pm pdt Friday for zone 88. (see laxnpwlox).

Pz... Small craft advisory in effect until 3 am pdt Saturday for
zones 645-650-655. (see laxmwwlox).

Gale warning in effect until 3 am pdt Saturday for zones
670-673-676. (see laxmwwlox).

Hazard potential outlook (sat-wed)
gusty northeast winds are possible across portions of los angeles
and ventura counties Saturday, with well above normal
temperatures expected.

Public... Mw/rorke
aviation... Rat
marine... Sweet
synopsis... Stu
weather.Gov/losangeles


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
46215 - Diablo Canyon, CA (076) 9 mi34 min 53°F7 ft
PSLC1 - 9412110 - Port San Luis, CA 12 mi54 min W 8 G 9.9 60°F 50°F1015.7 hPa
46011 - SANTA MARIA - 21 NM Northwest of Point Arguello, CA 28 mi64 min NNW 23 G 29 55°F 55°F9 ft1015.6 hPa (+0.9)

Wind History for Port San Luis, CA
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G24
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W12
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G35
W10
G27
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SE2
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W14
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G12
SE2

Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
San Luis Obispo, San Luis Obispo County-Mc Chesney Field, CA12 mi58 minNW 16 G 2010.00 miFair63°F51°F65%1014.3 hPa

Wind History from SBP (wind in knots)
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Last 24hrNW12NW9NW15NW17
G24
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G30
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NW18NW13NW13NW12NW11NW11NW11NW10NW13NW10NW8NW7NW14NW10NW10NW12NW16
G20
1 day agoN8NW14NW18NW18NW19
G25
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NW14NW16NW14NW8NW10NW8NW8NW8NW94W6SW105NW10NW10NW11
2 days agoNW6W7NW15NW16NW18
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NW21NW19
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NW19NW17
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G23
--NW13NW10NW13NW11NW11NW10NW7N4W3N9
G17
NW12NW11

Tide / Current Tables for Morro Bay, California
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Morro Bay
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Thu -- 06:15 AM PDT     Sunrise
Thu -- 06:38 AM PDT     -0.15 feet Low Tide
Thu -- 07:28 AM PDT     Moonrise
Thu -- 12:37 PM PDT     3.34 feet High Tide
Thu -- 05:51 PM PDT     1.50 feet Low Tide
Thu -- 07:46 PM PDT     Sunset
Thu -- 09:25 PM PDT     Moonset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
4.94.33.42.31.30.4-0.1-0.10.31.122.83.33.332.521.61.51.72.33.24.14.8

Tide / Current Tables for Port San Luis, Pacific Ocean, California
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Port San Luis
Click for Map
Thu -- 05:31 AM PDT     -1.04 feet Low Tide
Thu -- 06:15 AM PDT     Sunrise
Thu -- 07:28 AM PDT     Moonrise
Thu -- 11:52 AM PDT     4.25 feet High Tide
Thu -- 05:10 PM PDT     1.20 feet Low Tide
Thu -- 07:45 PM PDT     Sunset
Thu -- 09:24 PM PDT     Moonset
Thu -- 11:22 PM PDT     6.00 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
5.34.22.61-0.2-0.9-1-0.30.82.13.344.23.93.22.31.61.21.42.13.24.45.46

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 (12,3,4,5)
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Ground Weather Radar Station Vandenberg AFB, 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.