Sunday, April22, 2018 L-36.com


Marine Weather and Tides
Pismo Beach, CA

Version 3.4
What's New / NOTES
3/3/2018 - There is a new GOES Satellite for the east coast that required rewriting that part of the code. Please report any issues.
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.

Sunrise 6:18AMSunset 7:42PM Sunday April 22, 2018 2:39 PM PDT (21:39 UTC) Moonrise 11:18AMMoonset 12:46AM Illumination 50% Phase: First Quarter Moon; Moon at 7 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- 131 Pm Pdt Sun Apr 22 2018
Tonight..NW winds 15 to 20 kt in the evening, becoming 10 to 15 kt. Wind waves 2 to 3 ft. NW swell 5 to 7 ft at 13 seconds. Areas of dense fog with vsby 1 nm or less after midnight.
Mon..Winds variable 10 kt or less, becoming nw 10 kt in the afternoon. Wind waves 2 ft or less. NW swell 4 to 6 ft at 13 seconds. Areas of dense fog with vsby 1 nm or less in the morning.
Mon night..NW winds 10 to 15 kt in the evening, becoming 5 to 10 kt. Wind waves 2 ft or less. NW swell 3 to 5 ft at 12 seconds. Areas of fog after midnight.
Tue..Winds variable 10 kt or less, becoming W 10 to 15 kt in the afternoon. Wind waves 2 ft or less. NW swell 3 to 5 ft at 12 seconds. Areas of fog in the morning.
Tue night..NW winds 10 to 15 kt in the evening, becoming 5 to 10 kt. Wind waves 2 ft or less. NW swell 4 to 6 ft at 15 seconds. Patchy fog after midnight.
Wed..Winds variable 10 kt or less, becoming W 10 kt in the afternoon. Wind waves 2 ft or less. NW swell 4 to 6 ft. Patchy fog in the morning.
Wed night..W winds 10 to 15 kt in the evening, becoming variable 10 kt or less. Wind waves 2 ft or less. NW swell 4 to 6 ft. Patchy fog after midnight.
Thu..NW winds 15 to 20 kt. Combined seas 4 to 6 ft. Patchy fog.
Fri..W winds 15 to 20 kt. Combined seas 4 to 6 ft. Patchy fog.
PZZ600 131 Pm Pdt Sun Apr 22 2018
Synopsis for the southern california coast and santa barbara channel including the channel islands national marine sanctuary and national park..At 20z...or 1 pm pdt...a 1031 mb surface high was centered about 200 nm west of portland and a 1009 mb low was over southern nevada. A trough of low pressure was along the ca coast. A shallow marine inversion will possibly bring patchy dense fog across the coastal waters later tonight and Mon morning.

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 222024 aaa
afdlox
area forecast discussion... Updated
national weather service los angeles oxnard ca
124 pm pdt Sun apr 22 2018
updated marine discussion

Synopsis 22 1242 pm.

There will be overnight and morning coastal low clouds and fog
for several days this coming week otherwise conditions will be
warm and dry. Temperatures will cool a bit Friday and Saturday as
a weak weather system moves across the region.

Short term (tdy-wed) 22 1226 pm.

Weak upper level ridge of high pressure combined with a continued
warm air mass bringing another very warm day across interior
sections today, with warmest locations approaching 90 degrees.

Closer to the coast, onshore winds are helping to bring some
cooling. Latest NAM wrf models still indicating the potential
for low clouds and fog to return to some coastal areas tonight,
possibly reaching the san gabriel valley by Monday morning. The
marine layer will be quite shallow, so there is the potential for
patchy dense fog. The increased onshore flow and marine influence
expected to bring some cooling to coastal and valley areas on
Monday, however little change in temperatures across the mountains
and deserts.

A weak upper low will approach the forecast area from the
southwest Monday night into Wednesday which will bring some
higher level clouds at times to the region. There will continue
to be moderate onshore flow and marine influence which will bring
some night morning low clouds and fog to coastal valley areas.

High temperatures will continue to slowly trend down into midweek.

Long term (thu-sun) 22 1239 pm.

Large upper level low pressure system will be spinning off the
northern california coast by Thursday. Latest 12z GFS model
trending further northward (similar to ECMWF model) with moving
this low pressure system inland Friday night into Saturday.

As a result, keeping pops below 15 percent in the Friday
night Saturday time frame seems reasonable for now across our
area, as most of the moisture and energy with this system is
projected to remain well north. Also of note, the latest gfs
ensembles also trending much drier with this system for our
area. The main impact of this system will be gusty west to
northwest winds across the region along with a cooling trend.

Aviation 22 1807z.

At 1710z at klax, the marine inversion was around 400 ft deep. The
top of the inversion was at 2200 ft with a temperature of 21 deg c.

Moderate confidence overall in the 18z tafs due to uncertainties
with the timing and extent of low clouds and fog for all coastal
airfields except ksbp later tonight into Mon morning. The
development of the low clouds with lifr ifr CIGS vsbys are expected
to range from about 08z at ksmx and klgb to around 13z at ksba then
persist thru late Mon morning for the most part. The timing of the
onset of the low clouds may be off + - an hour or two. Otherwise,
vfr conditions can be expected.

At ksbp, MVFR vsbys and scattered low clouds are expected from 12z-
16z Mon morning, however there is a 40% chance low clouds and
lifr ifr conditions could move into the airfield at that time.

Otherwise,VFR conditions should prevail at the airfield
thru Mon morning.

For kprb, kbur, kvny, kwjf and kpmd, there is hi confidence in the
18z tafs withVFR conditions expected thru Mon morning.

Klax... Moderate confidence overall in the 18z TAF due to
uncertainties with the timing and extent of low clouds and fog for
later tonight thru Mon morning. The development of the low clouds
with lifr conditions are expected around 09z then improve to ifr
around 14z and to MVFR around 17z before scattering toVFR around
19z. The timing of the onset and dissipation of the low clouds may
be off + - an hour or two. Otherwise,VFR conditions can be expected
thru Mon afternoon.

Kbur... Generally hi confidence in the 18z TAF withVFR conditions
expected through Mon morning. There is a 20% chance of ifr CIGS mon
morning, however.

Marine 22 123 pm.

Generally hi confidence in the current forecast. Gusty NW winds to
small craft advisory (sca) can be expected over outer water zone
pzz670 through late tonight. Otherwise, winds and seas are
expected to remain largely below small craft advisory (sca) levels
tonight through Thursday across the coastal waters. There is a
50%-60% chance of SCA winds developing on Fri for much of the
coastal waters.

A shallow marine inversion may generate some patchy dense fog
later tonight and Monday morning across the coastal waters.

Lox watches warnings advisories
Ca... None.

Pz... Small craft advisory in effect until 3 am pdt Monday for zone
670. (see laxmwwlox).

Hazard potential outlook (wed-sun)
No significant hazards expected.

Public... Gomberg
aviation... Sirard
marine... Sirard
synopsis... Kj
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 mi51 min E 2.9 G 2.9 62°F 54°F1013.7 hPa
CPXC1 10 mi39 min ESE 1.9 G 2.9 62°F 1013.6 hPa56°F
46215 - Diablo Canyon, CA (076) 13 mi42 min 56°F7 ft
46011 - SANTA MARIA - 21 NM Northwest of Point Arguello, CA 13 mi49 min WNW 16 G 18 55°F 55°F8 ft1013.8 hPa (-0.8)
PTGC1 - Point Arguello, CA 32 mi39 min N 13 G 14 55°F 1014.7 hPa (-0.5)
HRVC1 39 mi51 min 55°F 1014.6 hPa
46218 - Harvest, CA (071) 40 mi39 min 54°F9 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 mi43 minNW 1410.00 miFair75°F55°F50%1012.7 hPa
Santa Maria Public Airport/Capt G Allan Hancock Field, CA20 mi48 minNW 128.00 miFair73°F55°F53%1013.9 hPa
Lompoc, Vandenberg Air Force Base, CA23 mi1.7 hrsNW 910.00 miFair66°F53°F65%0 hPa

Wind History from SBP (wind in knots)
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Last 24hrNW12NW13NW15NW13NW7W5CalmNW3CalmCalmSE4CalmCalmSE3CalmCalmCalmCalmCalmNW5NW6NW9NW11NW14
1 day agoNW21NW20NW18NW18NW13NW12NW10NW5NW4NW4CalmCalmSW4E5SE3CalmCalmCalmN3CalmNW7NW6W6NW14
2 days agoNW20
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NW13NW11NW10NW7W5W5W5E4CalmE3CalmCalmCalmSE4CalmNW10NW12NW14NW16NW16

Tide / Current Tables for Avila, California
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Avila
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Sun -- 01:46 AM PDT     Moonset
Sun -- 02:48 AM PDT     2.25 feet High Tide
Sun -- 06:21 AM PDT     Sunrise
Sun -- 10:22 AM PDT     -2.90 feet Low Tide
Sun -- 12:17 PM PDT     Moonrise
Sun -- 02:46 PM PDT     First Quarter
Sun -- 05:26 PM PDT     1.20 feet High Tide
Sun -- 07:41 PM PDT     Sunset
Sun -- 10:21 PM PDT     -0.14 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
11.72.12.221.30.4-0.7-1.7-2.5-2.9-2.8-2.3-1.5-0.60.30.91.21.10.90.40.1-0.1-0.1

Tide / Current Tables for Port San Luis, Pacific Ocean, California
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Port San Luis
Click for Map
Sun -- 01:46 AM PDT     Moonset
Sun -- 03:13 AM PDT     4.80 feet High Tide
Sun -- 06:21 AM PDT     Sunrise
Sun -- 10:54 AM PDT     -0.49 feet Low Tide
Sun -- 12:17 PM PDT     Moonrise
Sun -- 02:46 PM PDT     First Quarter
Sun -- 06:11 PM PDT     3.75 feet High Tide
Sun -- 07:41 PM PDT     Sunset
Sun -- 10:54 PM PDT     2.58 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
3.54.14.64.84.74.23.42.31.20.3-0.3-0.5-0.20.41.32.233.53.73.73.432.72.6

Weather Map and Satellite Images
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wmap_P
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 (17,4,5,8)
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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.