Friday, July28, 2017 L-36.com


Marine Weather and Tides
Pismo Beach, CA

Version 3.4
What's New / NOTES
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.
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 6:08AMSunset 8:09PM Friday July 28, 2017 10:01 AM PDT (17:01 UTC) Moonrise 10:42AMMoonset 10:46PM Illumination 26% Phase: Waxing Crescent; Moon at 5 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- 826 Am Pdt Fri Jul 28 2017
Today..Winds variable 10 kt or less...becoming nw 15 to 20 kt in the afternoon. Wind waves 2 to 3 ft. W swell 5 to 6 ft at 9 seconds. Patchy fog in the morning.
Tonight..NW winds 10 to 20 kt in the evening...becoming variable 10 kt or less. Wind waves 1 to 3 ft. Mixed swell nw 3 to 5 ft at 9 seconds and S 3 ft at 13 seconds. Patchy fog.
Sat..Winds variable 10 kt or less...becoming nw 10 to 15 kt in the afternoon. Wind waves 2 ft or less. Mixed swell nw 4 to 5 ft at 8 seconds and S 3 ft at 13 seconds. Patchy fog in the morning.
Sat night..NW winds 10 to 15 kt in the evening...becoming variable 10 kt or less. Wind waves 2 ft or less. Mixed swell nw 3 to 4 ft at 8 seconds and S 3 ft at 13 seconds. Patchy fog.
Sun..Winds variable 10 kt or less...becoming W 10 to 15 kt in the afternoon. Wind waves 2 ft or less. Mixed swell nw 3 to 4 ft at 8 seconds and S 3 ft at 13 seconds. Patchy fog in the morning.
Sun night..W winds 10 to 15 kt in the evening...becoming variable 10 kt or less. Wind waves 2 ft or less. Mixed swell nw 3 to 4 ft at 8 seconds and S 3 ft at 12 seconds. Patchy fog after midnight.
Mon..Winds variable 10 kt or less early...becoming W 10 to 15 kt. Wind waves 2 ft or less. Mixed swell nw 3 to 4 ft and S 3 to 4 ft. Patchy fog.
Tue..NW winds 10 to 15 kt. Wind waves 2 ft. Mixed swell nw 3 to 4 ft and S 2 to 4 ft. Patchy fog.
PZZ600 826 Am Pdt Fri Jul 28 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 1026 mb surface high was centered 900 nm W of point conception...and a 1003 mb thermal low was centered near needles. This pattern will change little through Sat.

7 Day Forecast for Marine Location Near Pismo Beach, CA
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location: 35.03, -120.79     debug


Area Discussion for - Los Angeles/Oxnard, CA
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Fxus66 klox 281634
afdlox
area forecast discussion
national weather service los angeles oxnard ca
934 am pdt Fri jul 28 2017

Synopsis
Partly cloudy skies will persist into next week, with an overnight
coastal marine layer. On Sunday, monsoonal moisture will bring to
the los angeles mountains, possible afternoon and evening storms.

The storms should spread to the santa barbara and ventura mountains
on Tuesday, and encompass los angeles county from Tuesday evening
into Thursday. Normal temperatures are forecast into Monday, then
a warmup as the high builds in.

Short term (tdy-sun)
if you like looking at fog and low stratus in visible imagery
then this is a good day for you - with numerous eddy circulations
along the coast from san luis obispo county to san diego. The
stratus has pulled back to the beaches everywhere with the
exception of the lompoc to san luis obispo area, where is should
still clear by late morning. Morning temperature trends are in
tune with the forecast so far.

*** from previous discussion ***
the marine layer this morning was around 1200 ft around lax this
morning. Latest fog product imagery indicated widespread stratus
across the central coast with areas of low clouds reaching the
santa ynez valley this morning. For coastal areas S of point
conception, expect low clouds to fill in across the ventura coast
and much of the sba south coast. The la coast is having a tough
time seeing low clouds filling in. Looks like there will be some
patchy low clouds filtering into the ventura county valleys and
possibly in the eastern san gabriel valley by sunrise. Skies
should clear out quickly in any valley locations this morning,
then clear to the beaches by mid to late morning. A weak upper
trough moving across the northern half of the state will help to
lower boundary layer temps and h5 heights which will translate to
a few degrees of cooling in most areas today. Expect the antelope
valley to reach around 101 as well as paso robles this afternoon.

Valleys will remain mostly in the lower to mid 90s. Could be a few
flat CU build ups across the mountains this afternoon.

For tonight, a weak eddy will develop and should bring another
round of low clouds to coastal areas and possibly into a few
coastal valleys by Sat morning. The cooling trend is expected to
continue into Saturday with more flat cumulus likely to develop
across the la vtu county mountains. Not expecting any showers as
most of the deeper moisture remains to the south and east of the
forecast area. High temps will continue to trend cooler a degree
or two with up to 5 degrees of cooling across the salinas river
valley yet still remain quite warm in the mid 90s. No significant
changes from Friday.

By Sunday, the upper level pattern will begin
to shift out of the southeasterly direction. The upper lvl ridge
set up closer to the four corners region, which will allow mid
level moisture to advect into SE california. All models now show
the monsoonal front (850 mb dewpoint temp) remaining east of la
county on Sunday. The monsoonal flow will be delayed 24 hours due
to the dry air between 700-500 mb therefore have taken down slight
chance for thunderstorms Sunday afternoon for the la county mtns.

Not much change temperature wise for Sunday.

Long term (mon-thu)
both the GFS and ECMWF models remain to be in good synoptic
agreement with large scale features through the long term period.

The southeaster flow will continue into Tuesday with the
monsoonal front expands westward into ventura county. Have added
slight chance for thunderstorms to the ventura county mtns Tuesday
afternoon as well as the la county mtns and antelope valley. Pwat
values are not too impressive at around 1.3". However, an
easterly wave develops across la vtu counties by Tue evening.

There will be an increase in mid level moisture, therefore have
added a slight chance for thunderstorms for coast and valleys of
la vtu counties through the overnight hours. Showers will be
elevated and with some cloud top cooling across the coastal waters
would expect a few cells to develop. Although the forecast calls
for slight chance thunderstorms, there is a good chance it could
just be showers.

Wednesday looks to be the best chance for showers and
thunderstorms across the la vtu county mtns, antelope valley
during the afternoon hours, and once again spilling over into the
valleys and coastal areas Wednesday night. Pwat values will reach
1.5" with easterly flow steering winds over 15 mph. There could be
the potential for local flooding, but if storms develop, they
should be moving fast enough not to cause any flash flooding. The
flow should turn more SE Thursday, therefore only expecting some
showers and thunderstorms across the la vtu county mtns. As far as
temps go, the upper ridge will continue to strengthen and with
weaker offshore flow, expect the warmest valleys to reach the
lower 100s, while the antelope valley is expecting highs around
105. Of course, if a thick cloud shield sits over the region, then
high temps would likely be a few degrees cooler than what's in
the forecast.

Aviation 28 1135z.

At 11z, the marine layer depth at klax was around 1200 ft. The
top of the marine inversion was around 3000 ft with a temperature
of 25 degrees celsius.

Widespread low clouds with lifr to ifr conditions currently across
coastal sections from vtu county northward, in the santa ynez
valley and locally in the vtu county valleys. Skies should become
mostly clear during the mid to late morning hours.

Clouds have pushed into south coastal sections of l.A. County,
with mostly low MVFR conds. Expect stratus to push across the
remainder of coastal l.A. County coastal areas by 13z and should
clear by mid to late morning. Stratus with ifr conds will affect
the san gabriel valley for a few hours through mid morning.

Low clouds should be widespread in all coastal areas as well
as the santa ynez and san gabriel valleys and locally in the vtu
county valleys tonight Sat morning. Conds will be mostly ifr to
lifr, except low MVFR across coastal sections of l.A. County.

Klax... Moderate confidence in the 12z taf. There is a 20-30%
chance that skies will remain clear and condsVFR this morning.

There is a 20-30% chance that CIGS tonight will not arrive
until after 08z.

Kbur... High confidence in the 12z TAF withVFR conditions
expected thru the period. There is a 10-20% chance of ifr conds
between 12z and 16z tonight Sat morning.

Marine 28 800 am.

For the outer waters, moderate to high confidence in current
forecast. Expect SCA level winds across the northern two thirds of
the outer waters this afternoon through late tonight, and there is
a 20% chance that winds will remain below SCA levels. Across the
southern outer waters, local SCA gusts are expected this afternoon
through late tonight, and there is a 30% percent chance that a
sca will be needed there. After late tonight, SCA conds are not
expected through mon, with a good chance of SCA levels winds tue.

For the inner waters, high confidence in current forecast. For
all the waters, winds and seas are expected to remain below sca
levels through tue. However, there may be local small craft
advisory level gusts across the inner waters each afternoon and
evening through sat... Strongest in the santa barbara channel.

A long-period southerly swell will spread into the coastal waters
tonight and Saturday, then a moderate swell with a rather long
period will affect the waters through mon. The santa barbara
channel will be mostly blocked from the swell energy due to the
channel islands... Except for possible the far eastern portion.

Lox watches warnings advisories
Ca... Beach hazards statement in effect from Saturday morning
through Tuesday evening for zones 40-41-87. (see laxcfwlox).

Pz... Small craft advisory in effect from 3 pm this afternoon to 3
am pdt Saturday for zones 670-673. (see laxmwwlox).

Hazard potential outlook (sun-thu)
a high surf event should peak over the weekend as a long-period
southerly swell arrives at the southern california beaches. High
surf and strong rip currents will occur through the weekend and
probably into late next week.

Public... Kaplan jld
aviation... Db
marine... Db sirard
synopsis... Stu
weather.Gov losangeles


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
PSLC1 - 9412110 - Port San Luis, CA 10 mi43 min SE 4.1 G 4.1 55°F 61°F1015.3 hPa
46011 - SANTA MARIA - 21 NM Northwest of Point Arguello, CA 13 mi71 min WNW 5.8 G 7.8 57°F 59°F5 ft1014.4 hPa (+1.4)
46215 - Diablo Canyon, CA (076) 13 mi41 min 63°F4 ft
PTGC1 - Point Arguello, CA 32 mi61 min N 7 G 7 56°F 1014.8 hPa (+1.6)
46218 - Harvest, CA (071) 40 mi31 min 62°F5 ft

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, CA17 mi65 minN 010.00 miOvercast60°F55°F86%1013.9 hPa
Santa Maria Public Airport/Capt G Allan Hancock Field, CA20 mi70 minS 37.00 miOvercast59°F57°F93%1014.6 hPa
Lompoc, Vandenberg Air Force Base, CA23 mi66 minVar 42.50 miFog/Mist57°F57°F100%1014.7 hPa

Wind History from SBP (wind in knots)
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Last 24hrCalmNW6NW5NW10NW13NW13W12NW8NW6NW5NW7NW9NW6NW5W4NW4W4--W3CalmCalmS3S4Calm
1 day ago33CalmNW8NW12NW12NW13NW11NW11NW11NW10NW10NW8NW8NW8NW9NW5NW54NW5NW4SW3CalmCalm
2 days ago3CalmW7CalmSW8S6SW64NW7NW9NW8NW7NW8NW8NW8NW6NW5NW4NW3CalmNW7NW5NW5NW5

Tide / Current Tables for Avila, California
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Avila
Click for Map
Fri -- 01:18 AM PDT     1.72 feet High Tide
Fri -- 06:09 AM PDT     Sunrise
Fri -- 08:13 AM PDT     -2.42 feet Low Tide
Fri -- 11:42 AM PDT     Moonrise
Fri -- 03:06 PM PDT     1.65 feet High Tide
Fri -- 08:09 PM PDT     Sunset
Fri -- 09:03 PM PDT     -0.66 feet Low Tide
Fri -- 11:46 PM PDT     Moonset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
1.41.71.61.20.4-0.5-1.4-2.1-2.4-2.3-1.8-0.900.91.41.61.51.10.5-0.1-0.5-0.7-0.5-0.2

Tide / Current Tables for Port San Luis, Pacific Ocean, California
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Port San Luis
Click for Map
Fri -- 01:58 AM PDT     4.57 feet High Tide
Fri -- 06:09 AM PDT     Sunrise
Fri -- 08:33 AM PDT     0.66 feet Low Tide
Fri -- 11:42 AM PDT     Moonrise
Fri -- 03:21 PM PDT     4.83 feet High Tide
Fri -- 08:09 PM PDT     Sunset
Fri -- 09:31 PM PDT     1.99 feet Low Tide
Fri -- 11:46 PM PDT     Moonset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
3.94.44.64.43.82.921.20.70.71.11.92.83.84.54.84.74.33.732.4222.3

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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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.