Wednesday, November22, 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 6:43AMSunset 4:53PM Wednesday November 22, 2017 3:05 AM PST (11:05 UTC) Moonrise 10:07AMMoonset 8:30PM Illumination 14% Phase: Waxing Crescent; Moon at 4 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- 226 Am Pst Wed Nov 22 2017
Today..Winds variable 10 kt or less, becoming nw 10 to 15 kt in the afternoon. Wind waves 2 ft or less. W swell 3 to 5 ft at 11 seconds.
Tonight..NW winds 15 to 20 kt in the evening, becoming W 5 to 10 kt. Wind waves 2 to 3 ft. W swell 4 to 5 ft at 10 seconds.
Thu..Winds variable 10 kt or less, becoming nw 15 to 20 kt in the afternoon. Wind waves 2 to 3 ft. NW swell 4 to 5 ft at 13 seconds.
Thu night..NW winds 10 to 20 kt. Wind waves 1 to 3 ft. NW swell 5 to 6 ft at 12 seconds.
Fri..NW winds 10 to 15 kt. Wind waves 2 ft or less. W swell 4 to 5 ft at 11 seconds.
Fri night..NW winds 10 to 15 kt in the evening, becoming variable 10 kt or less. Wind waves 2 ft or less. NW swell 4 to 5 ft at 12 seconds.
Sat..S winds 5 to 10 kt. Wind waves 2 ft or less. NW swell 3 to 5 ft.
Sun..W winds 10 to 15 kt. Wind waves 2 ft or less. NW swell 6 to 8 ft. Slight chance of showers.
PZZ600 226 Am Pst Wed Nov 22 2017
Synopsis for the southern california coast and santa barbara channel including the channel islands national marine sanctuary and national park..At 09z...or 1 am pst...a 1031 mb high was over eastern utah with a ridge extending to a 1020 mb high 200 nm sw of point conception. A weak trough of low pressure was along the southern ca coast.

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 220413
afdlox
area forecast discussion
national weather service los angeles oxnard ca
813 pm pst Tue nov 21 2017

Synopsis
Record to near record temperatures are forecast into Friday due
to the combination of an unseasonably strong upper ridge and gusty
offshore winds persist over the region. An upper level trough
will approach by Sunday for increasing clouds and cooler
temperatures. A surface high pressure is expected to build into
the great basin by late Monday and into early Wednesday allowing
for gusty offshore winds.

Short term (tue-fri)
no changes to the forecast expected this evening. Forecast is in
good shape. Latest 00z models are in, and continue to show record
breaking heat potential for Wed and thanksgiving. Tomorrow should
be the hottest day with only a degree or two of cooling for the
valleys and immediate coastal expected for thanksgiving. The
seabreeze should pick up earlier along the coast for thanksgiving,
but still remain very warm before the seabreeze kicks in.

Latest fog product imagery indicated most of the high clouds
moving up and around the strong upper ridge keeping the high
clouds to the north and east of the forecast area this evening.

The upper level ridge has strengthened over the region today. Weak
to locally moderate offshore flow allowed for some significant
heating today as expected. In fact downtown l.A. Was 15 degrees
warmer than yesterday at 88 degrees. Most coast and coastal
valleys were up 8 to 20 degrees today, while interior valleys,
mountains and the antelope valley rose 4 to 10 degrees for the
most part. There were 5 official records broken today including
burbank, woodland hills, sandberg, santa maria and paso robles.

Warmest areas reached the lower 90s including san luis obispo at
90 degrees, ojai was the warmest location at 94 degrees and
plenty of lower 90s across the l.A. And ventura county coastal
valleys.

As the upper ridge continues to strengthen over the area with
continued offshore flow and sub advisory wind gusts for Wednesday,
temps will continue to climb. Should double the amount of records
that were broken today including downtown l.A where a 93 is being
forecast. Most of l.A. And vtu counties will see temperatures
rise an additional 5 to 10 degrees on wed. A slight cooling trend
is expected across the central coast due to the seabreeze kicking
in a bit earlier tomorrow. Although some locations were and will
continue to be around 20 degrees warmer than normal for this time
of year over the next few days, not expecting oppressive heat
overnight due to less daylight, lower Sun angle and dry conditions
which help in the cooling process. Lows will remain in the mid
60s to lower 70s across some of the wind prone areas overnight.

***from previous discussion***
main weather story over the next few days will be record heat,
which is expected to peak on Wednesday. This heat wave being
caused by a strong upper level ridge building over southwest
california today, peaking in strength on Wednesday when heights
are expected to reach 593 dm.

On Wednesday, offshore winds are expected to be slightly stronger
and more widespread across the region, with gusts ranging between
30 and 40 mph across wind favored valleys mountains of la ventura
counties, falling just below advisory levels. Lax-daggett gradient
expected to climb to around -6 mb again Wednesday morning. Offshore
breezes are also expected to briefly surface across the ventura
county coastal plain and malibu to hollywood hills on Wednesday
morning. As a result, looking for widespread record breaking heat
on Wednesday, including coastal areas. Highs across most coastal
and valley areas expected to range from the upper 80s to mid 90s
on Wednesday. In addition, very warm overnight lows (in the 70s to
around 80) are expected in the foothills and wind prone areas. As
a result, there is the potential for some moderate heat impacts
on Wednesday, especially in the foothills and santa monica
mountains where there will be little relief in the heat through
the overnight hours.

Upper level ridge and offshore gradients are expected to weaken
slightly on thanksgiving day, leading to 2 to 3 degrees of cooling
for most coastal valley areas. However, it should be noted that
despite this slight cooling, temperatures will still reach record
levels on thanksgiving day, including many temperatures into the
lower to mid 90s in the valleys. Also of note is the forecasted
high of 90 degrees for downtown los angeles on thanksgiving day
which would tie an all-time high temperature for the holiday. The
highest thanksgiving high temperature for downtown los angeles
was set on november 26th, 1903.

The combination of hot temperatures, low humidities, and very dry
fuels will lead to elevated fire danger through the remainder of
the week. Brief critical fire weather conditions will persist this
afternoon through Wednesday when the offshore winds will be
strongest across los angeles and ventura counties.

Long term (sat-tue)
the ec and GFS are in good agreement that the upper level ridge
will continue to gradually shift eastward through the weekend
leading to a continued cooling trend with increasing higher
level clouds. A weak cold front is expected to bring precipitation
to northern and central california this weekend. The latest
operational gfs ECMWF models and GFS ensemble members showing
the trailing edge of this system could bring a slight chance of
showers to slo county sometime between Sunday and Monday morning.

As the weak trough moves through the area, looking for
temperatures to return to near normal levels with highs in the
lower to mid 70s.

From Monday night into Tuesday, the upper level trough is
expected to dig southeastward into the four corners area,
with a strong 1036 mb surface high building into the great
basin. There is the potential for strong northerly winds
across the mountains and sba south coast on Monday night,
followed by the potential for a strong santa ana wind event
on Tuesday. While it is still very early, the GFS and ecmwf
models are in fairly good agreement on the upper level pattern
and potential for a strong north-northeast offshore pressure
gradient in the Monday night-Tuesday time period. The offshore
flow will likely persist into Wednesday, with the potential
for moderate intensity.

Aviation 22 0030z...

at 2356z, there was a surface-based inversion at klax. The top of
the inversion was around 1400 feet with a temperature of 28
degrees celsius.

High confidence in 00z tafs as weak offshore flow will keep all
sitesVFR through Wed morning.

Klax... High confidence in the 00z TAF withVFR conditions
expected through Wed evening.

Kbur... High confidence in the 00z TAF withVFR conditions
expected through Wed afternoon.

Marine 21 800 pm...

for the outer waters, good confidence in current forecast. Winds
and seas are expected to remain below small craft advisory (sca)
levels through Wednesday. For Thursday through Friday there is a
50% chance of SCA level winds for pzz670, and a 50% chance of sca
level winds for for pzz673 Thu night. Otherwise conditions across
the outer waters will remain sub-sca level through Saturday, with
another chance of SCA winds on Sunday.

For the inner waters, good confidence in current forecast. For the
waters north of point sal, winds and seas are expected to remain
below SCA levels through Sunday, although there is a 20% chance
of SCA level winds Thursday afternoon evening. For the waters
south of point conception, winds and seas are expected to remain
below SCA levels through Sunday.

Lox watches warnings advisories
Ca... None.

Pz... None.

Hazard potential outlook (fri-tue)
hot and very dry conditions are expected thanksgiving day which
will continue to bring elevated fire danger. There is the
potential for greater fire weather impacts Monday night into
Tuesday. On Monday night, there will be the potential for
strong northerly winds and lowering humidities, followed
by the potential for a strong santa ana wind event and even
lower humidities on Tuesday.

Public... Kaplan gomberg
aviation... Kaplan
marine... Smith
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 mi48 min SE 2.9 G 5.1 59°F 57°F1018.9 hPa
CPXC1 10 mi38 min N 1.9 G 1.9 57°F 1018.7 hPa47°F
46215 - Diablo Canyon, CA (076) 13 mi39 min 60°F3 ft
46011 - SANTA MARIA - 21 NM Northwest of Point Arguello, CA 13 mi76 min NNW 5.8 G 7.8 62°F 62°F4 ft1018.3 hPa (-0.7)
PTGC1 - Point Arguello, CA 32 mi66 min N 9.9 G 11 59°F 1017.6 hPa (-1.4)
HRVC1 39 mi48 min 62°F 1017.4 hPa
46218 - Harvest, CA (071) 40 mi36 min 62°F4 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 mi70 minE 410.00 miFair54°F45°F72%1017.9 hPa
Santa Maria Public Airport/Capt G Allan Hancock Field, CA20 mi75 minSSE 310.00 miFair55°F48°F80%1018.5 hPa
Lompoc, Vandenberg Air Force Base, CA23 mi68 minESE 810.00 miFair57°F46°F68%1018.4 hPa

Wind History from SBP (wind in knots)
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Last 24hrCalmSW3S4CalmCalmCalmCalmCalmCalmW5W3W7W5SE4NW5CalmCalmCalmSE4CalmCalmE4CalmE4
1 day agoE4E4NW11NW6SE4CalmW5CalmNW13NW15NW10NW9NW8NW12NW10NW10NW4NW7CalmSE4S3CalmSE3Calm
2 days ago--CalmE3CalmCalmCalmCalmCalmCalmW5W9NW9NW13NW13NW8NW10NW9N8N3E3CalmE4SE3E4

Tide / Current Tables for Avila, California
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Avila
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Wed -- 01:04 AM PST     0.80 feet High Tide
Wed -- 04:50 AM PST     0.14 feet Low Tide
Wed -- 06:44 AM PST     Sunrise
Wed -- 10:07 AM PST     Moonrise
Wed -- 10:54 AM PST     2.45 feet High Tide
Wed -- 04:53 PM PST     Sunset
Wed -- 06:41 PM PST     -2.96 feet Low Tide
Wed -- 08:30 PM PST     Moonset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
0.60.80.70.40.20.10.30.71.21.82.32.52.21.60.7-0.4-1.5-2.4-2.9-2.9-2.6-2-1.1-0.3

Tide / Current Tables for Port San Luis, Pacific Ocean, California
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Port San Luis
Click for Map
Wed -- 01:08 AM PST     3.67 feet High Tide
Wed -- 05:12 AM PST     2.95 feet Low Tide
Wed -- 06:45 AM PST     Sunrise
Wed -- 10:07 AM PST     Moonrise
Wed -- 11:08 AM PST     4.98 feet High Tide
Wed -- 04:53 PM PST     Sunset
Wed -- 06:48 PM PST     0.07 feet Low Tide
Wed -- 08:30 PM PST     Moonset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
3.53.73.63.43.1333.33.84.34.854.84.43.52.61.50.70.20.10.30.91.72.5

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 (6,6,7,8)
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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.