Thursday, December13, 2018 L-36.com


Marine Weather and Tides
Pismo Beach, CA

Version 3.4
What's New / NOTES
10/6/2018 Colors of tide XTide graphs changed to emphasize that they were upgraded. See next note. Comments welcome.
10/4/2018 I have fixed XTide and updated the harmonic files. There were some name changes so you might have to click EDIT to find the new station name.

Sunrise 7:01AMSunset 4:52PM Thursday December 13, 2018 3:08 PM PST (23:08 UTC) Moonrise 11:38AMMoonset 10:45PM Illumination 38% Phase: Waxing Crescent; Moon at 6 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- 214 Pm Pst Thu Dec 13 2018
.small craft advisory for hazardous seas in effect through Friday morning...
Tonight..Winds variable 10 kt or less. Wind waves 2 ft or less. NW swell 9 to 11 ft at 16 seconds, subsiding to 7 to 9 ft at 16 seconds after midnight.
Fri..SE winds 5 to 10 kt. Wind waves 2 ft or less. NW swell 6 to 8 ft at 15 seconds. Slight chance of showers in the afternoon.
Fri night..Winds variable 10 kt or less. Wind waves 2 ft or less. NW swell 6 to 8 ft at 16 seconds. Slight chance of showers.
Sat..Winds variable 10 kt or less. Wind waves 2 ft or less. W swell 7 to 10 ft at 15 seconds.
Sat night..Winds variable 10 kt or less. Wind waves 2 ft or less. W swell 6 to 8 ft at 16 seconds.
Sun..Winds variable 10 kt or less, becoming S 10 kt in the afternoon. Wind waves 2 ft or less. W swell 6 to 7 ft at 14 seconds. Slight chance of rain.
Sun night..S winds 10 to 20 kt with gusts to 25 kt in the evening, becoming se 15 to 20 kt. Wind waves 2 to 4 ft. W swell 7 to 8 ft at 14 seconds, building to 17 to 18 ft at 14 seconds after midnight. Rain.
Mon..NW winds 15 to 20 kt. Combined seas 15 to 18 ft. Rain likely.
Tue..N winds 10 to 15 kt with gusts to 20 kt. Wind waves 1 to 3 ft. NW swell 10 to 13 ft.
PZZ600 214 Pm Pst Thu Dec 13 2018
Synopsis for the southern california coast and santa barbara channel including the channel islands national marine sanctuary and national park..At 21z...or 1 pm pst, a 1036 mb surface high was over eastern idaho extending a ridge to a 1023 mb high 300 nm W of point conception. Hazardous seas are possible through Saturday night across the outer and northern coastal waters. Potential for a larger swell to affect coastal waters Sunday night into Monday for all coastal waters.


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 132221
afdlox
area forecast discussion
national weather service los angeles oxnard ca
221 pm pst Thu dec 13 2018

Synopsis 13 1241 pm.

As the high pressure moves east tonight, a weak frontal system
will move in on Friday bringing mostly cloudy skies and cooler
temperatures. There is a slight chance of showers over the northern
areas. Clear skies will return on Saturday. A chance of rain is
expected Sunday night into Monday to all areas.

Short term (tdy-sun) 13 211 pm.

Double digit rises in temps many areas today, especially
la ventura county coast valleys. Winds mainly stayed under 25 mph.

Gradient trends starting to reverse now as pressures fall across
the interior and we'll see these trends continue through Saturday
morning but remain weakly offshore through the weekend. With
weaker offshore flow the next couple days temps will fall back to
normal levels, mainly mid 60s to lower 70s.

A big upper level ridge has moved over most of the western us
today but it will keep moving east through Friday and by Friday
afternoon the trough over the eastern pacific will push onshore
into wa or and northern ca. That trough is pulling up a ton of
high level moisture from the southwest and all that will be
covering california Friday keeping skies mostly cloudy through the
day but dry. The tail end of the cold front associated with the
trough may hold together just well enough to drop some light rain
over northern slo county Friday night but only if the wetter gefs
members are correct because the operational runs of the nam, gfs,
and ECMWF keep most of the precip offshore and to the north.

Either way it's a low impact system. Skies will clear out Saturday
with seasonal weather through the weekend. We will start to see
some increasing clouds from the northwest Sunday ahead of the next
system which could bring some light precip to areas north of pt
conception late Sunday night.

Long term (mon-thu) 13 220 pm.

The Monday system looks pretty similar as it has the last few days
with the bulk of the moisture and energy passing through northern
california. Still looks like a high chance of rain north of pt
conception and down to about sba but chances fade to the east as
there's very little southerly flow with the cold front and the
front will weaken as it moves across the area. Could see up to
around a half inch of rain across slo county, but then tapering
down to a tenth or less in the south.

Skies and precip will clear out from the northwest starting
Monday afternoon with sunny clear skies the rest of the week as
strong high pressure aloft builds over the area and gradients turn
offshore again. Gradients peak on Wednesday with enough upper
support to probably generate some advisory level santa anas across
la ventura counties. Temps will be warming up quite a bit, likely
mid to high 70s by Wed and Thu and possibly some lower 80s in the
warmest areas.

Although the ridge will flatten out somewhat later in the week
overall high pressure will dominate into next weekend with dry
weather and well above normal temps into early the following week
at least.

Aviation 13 1820z.

At 1724z, at klax, the marine layer depth was 500 feet. The top
of the inversion was at 900 feet with a temperature near 19
degrees celsius.

High confidence with 18z tafs.VFR conds are expected over the
next 24-hour period.

Klax... High confidence with 18z taf. ExpectVFR conditions
throughout the 30-hour period.

Kbur... High confidence in 18z taf.VFR conditions are expected
throughout the period.

Marine 13 915 am.

Moderate-to-high confidence in the current forecast. A moderately large
northwest swell will gradually build into the coastal waters
today and persist through Saturday night. This swell will
diminish some on Sunday, with hazardous seas developing across
outer and northern coastal waters today through Saturday night.

Between Sunday night and Tuesday, a very large swell is expected
to build into the coastal waters and affect west to northwest
facing harbors, including morro bay. Ventura harbor could also be
affected on Monday through at least Tuesday as some of the energy
from the swell filters into the socal bight.

Beaches 13 952 am.

An extended period of high surf continues to be likely at central
coast beaches through Monday. There is a 50 percent chance of
very large and potentially damaging surf developing over the
upcoming weekend and into early next week. The latest swell models
build a west-northwest swell to between 18-22 feet off the
central california coast with periods between 19 and 20 seconds.

Swell energy could possibly push into southern california bight
between Sunday and Monday.

If swells develop inline with model guidance, surf of 15-20 feet
with sets up to 25 feet will be possible at west and northwest
facing beaches along the central coast between Sunday night and
Tuesday. South of point conception, west facing shores could
potentially see surf between 8-12 feet.

Lox watches warnings advisories
Ca... High surf advisory in effect until 8 pm pst Saturday for
zones 34-35. (see laxcfwlox).

Pz... Small craft advisory for hazardous seas in effect until 9 am
pst Friday for zones 645-670-673-676. (see laxmwwlox).

Hazard potential outlook (sun-thu)
Very high surf and dangerous rip currents are expected Monday and
Tuesday.

Public... Mw
aviation... Sweet
marine... Sweet
beaches... Sweet
synopsis... Stewart
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 mi39 min E 1 G 1.9 66°F 58°F1021.7 hPa
CPXC1 10 mi27 min Calm G 1.9 66°F 1021.7 hPa48°F
46011 - SANTA MARIA - 21 NM Northwest of Point Arguello, CA 13 mi79 min NE 1.9 G 3.9 60°F 60°F11 ft1021.2 hPa (-2.4)
46215 - Diablo Canyon, CA (076) 13 mi42 min 60°F8 ft
PTGC1 - Point Arguello, CA 32 mi69 min S 7 G 11 67°F 1021.3 hPa (-2.5)
HRVC1 39 mi39 min 67°F 1020.8 hPa
46218 - Harvest, CA (071) 40 mi39 min 60°F11 ft
46259 42 mi39 min 59°F13 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 mi73 minSW 710.00 miFair67°F42°F41%1021.2 hPa
Santa Maria Public Airport/Capt G Allan Hancock Field, CA20 mi78 minWNW 510.00 miFair69°F45°F42%1021.5 hPa
Lompoc, Vandenberg Air Force Base, CA23 mi74 minN 610.00 miA Few Clouds68°F48°F49%1021.3 hPa

Wind History from SBP (wind in knots)
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Last 24hrNW12N9N7N6CalmCalmW5CalmS3SW4E4E5E4CalmCalmCalmCalmE5CalmCalmCalmSW7SW7W4
1 day agoNW5NW12
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W9N13N8NW10
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2 days agoN7NW8W7W63N6S3CalmNW11N9NW7SE3E3NW4NE45NE5N8NE4NW9NW106N6N16

Tide / Current Tables for Port San Luis, California
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Port San Luis
Click for Map
Thu -- 03:23 AM PST     3.96 feet High Tide
Thu -- 07:02 AM PST     Sunrise
Thu -- 07:51 AM PST     3.29 feet Low Tide
Thu -- 11:37 AM PST     Moonrise
Thu -- 12:59 PM PST     4.24 feet High Tide
Thu -- 04:51 PM PST     Sunset
Thu -- 08:39 PM PST     0.59 feet Low Tide
Thu -- 10:45 PM PST     Moonset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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2.63.33.73.93.93.73.53.33.33.43.63.94.14.24.13.83.22.41.710.70.60.91.4

Tide / Current Tables for Avila, California
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Avila
Click for Map
Thu -- 03:27 AM PST     0.95 feet High Tide
Thu -- 07:02 AM PST     Sunrise
Thu -- 07:11 AM PST     0.58 feet Low Tide
Thu -- 11:37 AM PST     Moonrise
Thu -- 12:19 PM PST     1.44 feet High Tide
Thu -- 04:51 PM PST     Sunset
Thu -- 08:22 PM PST     -2.25 feet Low Tide
Thu -- 10:45 PM PST     Moonset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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-0.20.30.70.90.90.80.60.60.60.811.31.41.41.10.6-0-0.8-1.5-2-2.2-2.2-1.9-1.3

Weather Map and Satellite Images
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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.
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Wind Forecast for Los Angeles/Oxnard, CA (18,4,5,8)
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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.