Friday, June23, 2017 L-36.com


Marine Weather and Tides
Los Osos, CA

Version 3.4
What's New / NOTES
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 5:47AMSunset 8:22PM Friday June 23, 2017 10:23 AM PDT (17:23 UTC) Moonrise 4:35AMMoonset 7:04PM 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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PZZ670 Point Piedras Blancas To Point Sal From 10 To 60 Nm- 832 Am Pdt Fri Jun 23 2017
Today..SE winds 5 to 10 kt...becoming sw in the afternoon. Wind waves 2 ft or less. NW swell 5 to 6 ft at 10 seconds. Patchy fog in the morning.
Tonight..Winds variable 10 kt or less...becoming nw 5 to 10 kt after midnight. Wind waves 2 ft or less. Mixed swell nw 5 ft at 10 seconds and se 3 ft at 16 seconds. Patchy dense fog with vsby 1 nm or less after midnight.
Sat..NW winds 10 to 20 kt with gusts to 25 kt in the afternoon. Wind waves 2 to 4 ft. NW swell 4 to 5 ft at 9 seconds. Patchy dense fog with vsby 1 nm or less in the morning.
Sat night..NW winds 15 to 20 kt with gusts to 25 kt. Combined seas 4 to 5 ft dominant period 8 seconds. Patchy fog after midnight.
Sun..NW winds 10 to 15 kt...becoming 15 to 20 kt in the afternoon. Wind waves 2 to 3 ft. NW swell 3 to 4 ft at 6 seconds. Patchy fog in the morning.
Sun night..NW winds 15 to 20 kt with gusts to 25 kt. Combined seas 4 to 5 ft dominant period 6 seconds. Patchy fog after midnight.
Mon..NW winds 15 to 25 kt with gusts to 30 kt. Combined seas 5 to 6 ft. Patchy fog.
Tue..NW winds 15 to 25 kt with gusts to 30 kt. Combined seas 5 to 6 ft. Patchy fog.
PZZ600 832 Am Pdt Fri Jun 23 2017
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 1029 mb surface high was centered 200 nm W of seattle, and a 1005 mb thermal low was centered near las vegas. Patchy dense fog will likely the coastal waters through the weekend. Winds will increase through the weekend with small craft advisory conditions possible across the outer coastal waters as early as Saturday.

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 231633
afdlox
area forecast discussion
national weather service los angeles oxnard ca
933 am pdt Fri jun 23 2017

Synopsis
The high will bring temperatures that are record breaking in the
deserts, well above normal inland, and around normal at the coast
into Monday. The skies should be fair except for an overnight
marine layer through next week. A low will move in Tuesday through
Thursday for a cooling trend and increasing cloudiness. Then the
end of the week should be in transition as the low exits.

Short term (tdy-sun)
marine lyr running deeper today but we're already starting to see
a reversal in the gradients this morning, both north south and
east west. This is likely why clouds are clearing fairly rapidly
this morning. They will still struggle to clear away from the
beaches, especially from malibu north and west but otherwise a
pretty typical clearing trend. Highs today south of pt conception
should be within a couple degrees of yesterday while up north most
areas should be 3-6 degrees cooler.

Main feature we're watching this morning is the moisture moving up
from mexico. Lightning has been detected in some of the clouds
over the waters about 60 miles south of the border. This goes
along pretty well with what the NAM has been showing as far as
instability aloft and moisture mainly above 600 mb. The feature is
expected to continue tracking northwest mostly over the ocean but
should clip the western portion of our land CWA (mainly sb slo
counties but possibly the western part of ventura county) tonight
and early Saturday. It's still very dry at lower levels but given
that we're already seeing some lightning from it and the nam
continues to show mucapes between 500-1500 j kg overnight it seems
prudent to go with at least some chance of dry thunderstorms.

Can't rule out a brief shower reaching the surface through all the
dry air but the main concerns are lightning and gusty winds.

By afternoon Saturday the air mass stabilizes and chances for
thunderstorms decrease. Meanwhile, temperatures should climb
several degrees Saturday as the marine lyr decreases and
gradients trend offshore. We could see triple digit heat returning
to some of the coastal valleys Saturday and or Sunday.

***from previous discussion***
the ridge pushes slowly to the east on Sunday but not really fast
enough to influence the temps. In fact the day will be very
similar to Saturday except that the mtns will be more stable and
thus there will be no afternoon clouds.

Long term (mon-thu)
gfs and ec agree through Tuesday. Both mdls flatten the ridge as
well as pushing it southward hgts fall from 593 dm to 590 dm
Monday and to 588 dm Tuesday. Onshore flow increase to the east
but decreases and actually turns offshore Tuesday. So there will
be a general cooling trend ESP inland through the period with the
exception of few vly location below north oriented canyons. Buy
Tuesday MAX temps will approach or reach normal at most locations.

The Wed and Thu forecasts are still in doubt as ec and gfs
continue to exhibit different forecasts. The ec begins to build a
ridge into the area while the GFS continues with the troffing
scenario. Both mdls have hung on to their respective fcsts for a
couple of days now it will be interesting to see which one blinks
and trends to the other's solution (hopefully it will not be the
annoying situation where both mdls change and adopt the others
forecast) for now have coordinated with the surrounding offices
and have agreed to persist with the cooler GFS soln.

Aviation 23 1020z
at 0930z at klax, the marine layer depth was near 2200 feet. The
top of the inversion was around 5000 feet with a temperature near
26 degrees celsius.

For 12z tafs... Moderate confidence in respect to stratus
persisting across coastal tafs much of today. Lower confidence in
timing of lifr-ifr CIGS going up a category this morning. Higher
confidence for MVFR CIGS for areas S of point conception after 16z
this morning. 30% chance no clearing will occur today for klgb,
klax, koxr before 22z. For terminals that have lifr conds N of
point conception, 30 percent chc that conds will remain ifr.

Terminals that are forecast to have no clearing may see some sct
conds 22z- 01z.

Klax... Moderate confidence in taf. There is a 30 percent chc of no
afternoon clearing. Very high confidence that there will not be an
east wind component over 5kt.

Kbur... Moderate confidence in taf. There is a 40 percent chc that
MVFR CIGS will not scour out until 20z.

Marine 23 900 am.

Winds will remain below small craft advisory levels through
Friday night across the outer waters, then gradually increase
through Monday. There is a 50 percent chance of small craft
advisory level winds developing Saturday morning with a better
chance by the afternoon across the outer coastal waters. Across
the inner waters, confidence is high there will not be any sca
through the weekend. However there will be a 50-60% chance for
local gusts to 25 kt across the W portion of the sba channel.

A 2-3 foot south swell at 16-17 second period will last through
Saturday and may pose a risk for breaking waves nearshore. People
boating or kayaking near shore should use extra caution.

Although the coverage of dense fog is easing a bit, there is still
a 40% chance of patchy dense fog during the night and mornings
through the weekend.

Fire weather 23 800 am.

Hot and dry conditions will continue through Monday of next week.

The hot conditions will also bring the potential for plume
dominated fires which can create their own intense winds. Gusty
onshore winds will continue today focusing the concerns to
interior los angeles county. Weaker but locally breezy northwest
winds should follow Saturday through Monday... Shifting the area of
concern to santa barbara county and the tejon pass.

Tropical moisture aloft will move through the area tonight and
Saturday. While this should have little impact on humidities at
the surface, this moisture is producing a small area of high-
based thunderstorms. If this feature persists, dry lightning will
be a major concern as an ignition source with little to no rain.

With such conditions, elevated fire weather concerns will persist
through Monday, especially over all interior sections away from
the influence of the marine layer. If fire ignition occurs,
dangerous fire behavior should be expected. As such, the public
should be extreme careful when handling potential ignition sources
such as cigarettes, campfires, hand torches and metallic weed
trimmers.

Lox watches warnings advisories
Ca... Heat advisory in effect until 9 pm pdt Sunday for zones
38-52>54. (see laxnpwlox).

Beach hazards statement in effect through Saturday evening
for zones 40-41-87. (see laxcfwlox).

Excessive heat warning in effect until 9 pm pdt Sunday for
zone 59. (see laxnpwlox).

Pz... None.

Hazard potential outlook (sun-thu)
hot temperatures with potential heat impacts will continue for
inland areas Sunday.

Public... Mw rorke
aviation... Kaplan
marine... Sweet
fire... Kittell
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 mi63 min 58°F4 ft
PSLC1 - 9412110 - Port San Luis, CA 12 mi53 min S 5.1 G 6 58°F 58°F1014.5 hPa
46011 - SANTA MARIA - 21 NM Northwest of Point Arguello, CA 28 mi93 min S 3.9 G 5.8 56°F 57°F5 ft1013.6 hPa (+1.0)

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, CA12 mi27 minN 010.00 miA Few Clouds65°F55°F73%1012.7 hPa

Wind History from SBP (wind in knots)
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Last 24hrCalmSW5SW7SW6SW10W73NW63W4SW3SW3CalmSW5SW5SW3S3SW4SW4SW3SW4CalmW3Calm
1 day ago53NW10
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2 days ago3CalmNW10NW11NW12NW11NW8NW12NW12NW11NW8NW8NW6NW6NW6NW4NW4NW3CalmCalmCalmS5CalmCalm

Tide / Current Tables for Morro Bay, California
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Morro Bay
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Fri -- 05:29 AM PDT     -0.70 feet Low Tide
Fri -- 05:35 AM PDT     Moonrise
Fri -- 05:49 AM PDT     Sunrise
Fri -- 11:35 AM PDT     2.97 feet High Tide
Fri -- 04:19 PM PDT     1.83 feet Low Tide
Fri -- 07:32 PM PDT     New Moon
Fri -- 08:03 PM PDT     Moonset
Fri -- 08:22 PM PDT     Sunset
Fri -- 10:38 PM PDT     5.63 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
4.33.21.90.8-0.1-0.6-0.6-0.10.81.72.42.92.92.72.421.81.92.33.14.14.95.55.6

Tide / Current Tables for Port San Luis, Pacific Ocean, California
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Port San Luis
Click for Map
Fri -- 04:24 AM PDT     -1.46 feet Low Tide
Fri -- 05:35 AM PDT     Moonrise
Fri -- 05:49 AM PDT     Sunrise
Fri -- 10:55 AM PDT     4.04 feet High Tide
Fri -- 03:38 PM PDT     1.91 feet Low Tide
Fri -- 07:32 PM PDT     New Moon
Fri -- 08:02 PM PDT     Moonset
Fri -- 08:21 PM PDT     Sunset
Fri -- 09:54 PM PDT     6.82 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
42.20.6-0.7-1.4-1.3-0.60.61.93.13.843.83.22.521.92.43.34.55.76.56.86.4

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 (13,3,4,5)
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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.