Saturday, August17, 2019 L-36.com


Marine Weather and Tides
Atascadero, CA

Version 3.4
NOTICE
7/25/2019 New feature in the Airports section gives a link to 5 minute updates for data reports.
6/2/2019. Many thanks to a user for reporting an error on one of the Edit pages. The switch to PHP 7.2 caused many pages that previously worked to quit working. I fixed many but I still depend on users to report ones I missed. Please report errors HERE or send an email to me at L-36.com. Allen

Sunrise 6:22AMSunset 7:51PM Saturday August 17, 2019 6:28 AM PDT (13:28 UTC) Moonrise 8:23PMMoonset 7:14AM Illumination 96% Phase: Waning Gibbous; Moon at 17 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- 258 Am Pdt Sat Aug 17 2019
Today..Winds variable 10 kt or less, becoming W 10 to 15 kt in the afternoon. Wind waves 2 ft or less. NW swell 4 to 5 ft at 10 seconds. Patchy fog in the morning.
Tonight..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 5 ft at 10 seconds. Patchy fog after midnight.
Sun..Winds variable 10 kt or less, becoming W 10 to 15 kt in the afternoon. Wind waves 2 ft or less. NW swell 4 to 5 ft at 10 seconds. Patchy fog in the morning.
Sun night..NW winds 10 to 15 kt in the evening, becoming 10 kt or less. Wind waves 2 ft or less. NW swell 3 to 4 ft at 9 seconds. Patchy fog after midnight.
Mon..Winds variable 10 kt or less, becoming nw 10 to 15 kt in the afternoon. Wind waves 2 ft or less. NW swell 3 to 4 ft at 9 seconds. Patchy fog in the morning.
Mon night..NW winds 10 to 15 kt. Wind waves 2 ft or less. NW swell 3 to 4 ft at 6 seconds. Patchy fog after midnight.
Tue..NW winds 15 to 20 kt with gusts to 25 kt. Combined seas 4 to 6 ft. Patchy fog.
Wed..NW winds 15 to 20 kt with gusts to 25 kt. Combined seas 5 to 7 ft. Patchy fog.
PZZ600 258 Am Pdt Sat Aug 17 2019
Synopsis for the southern california coast and santa barbara channel including the channel islands national marine sanctuary and national park..At 09z, or 2 am pdt, a 1028 mb high was about 1100 nm west of point conception and a 1002 mb thermal low was located over las vegas.


7 Day Forecast for Marine Location Near Atascadero, CA
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location: 35.46, -120.69     debug


Area Discussion for - Los Angeles/Oxnard, CA
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Fxus66 klox 171024
afdlox
area forecast discussion
national weather service los angeles oxnard ca
324 am pdt Sat aug 17 2019

Synopsis 17 315 am.

A trough of low pressure brings cooler temperatures to the region
this weekend. Expect low clouds and areas of fog to affect the
coast and valleys during the night and morning hours today and
Sunday. High pressure will return early next week, causing a
gradual warming trend.

Short term (tdy-mon) 17 253 am.

Today will be the coolest day of the next 7. A broad pos tilt trof
covers the western us. Hgts have fallen from ydy's 591 dm to 588
dm. Onshore flow has increased by 2.5 mb both to the north and
east and the onshore flow is now moderate in both directions. The
marine layer helped along by the onshore flow... Lowering hgts and
most importantly a moderate eddy has risen above 2000 ft and will
likely be near to 3000 ft by dawn. Marine layer stratus will
cover all of the coasts... Vlys and coastal slopes. Clearing will
be slow and many beaches will not clear at all. MAX temps will
fall everywhere ESP in the vlys. Coastal temps will fall 2 to 4
degrees and will end up 4 to 8 degrees blo normal. The interior
will cool 4 to 8 degrees and will be 3 to 5 degrees blo normal.

The vlys will cool 6 to 12 degrees and will end up 8 to 12 degrees
blo normal. Onshore flow will increase to about 8 mb to the east
this afternoon and will produce gusty winds in the antelope vly.

Sunday will be much like today. The only difference is that the
onshore flow will relax a little which will result in slightly
faster and better clearing of the marine layer stratus. This in
turn will allow for a few degrees of warming across the coasts and
vlys.

On Monday the dry upper level flow will switch from the NW flow
to the SW as a large upper high over texas expands westward. Hgts
rise to 591 dm. More importantly the onshore flow will decrease by
2 to 3 mb. The marine layer stratus will not be as extensive over
the vlys and will clear faster. MAX temps will rise from 2 to 4
degrees.

Long term (tue-fri) 17 313 am.

By Tuesday the upper-level high will push further west and hgts
will rise to 594 dm over SRN ca. The onshore flow to the east
will be weak and offshore flow will develop from the north. This
will greatly reduce the marine layer stratus pattern and will
bring another 3 to 6 degrees of warming to all areas.

Similar to this week's warm up, Wednesday and Thursday will be the
warmest days and if the forecast remains valid there will be a
need for heat products. Hgts will remain near 594 dm, or about 5
dm higher than normal. Weak onshore flow to the east and 2 to 3 mb
offshore flow from the north is expected. There will be minimal
morning stratus. Temperatures will jump another 4 to 8 degrees and
will be above normal almost everywhere. The ridge will break down
a little on Thursday which will drop MAX temps by 2 to 4 degrees.

The ridge breaks down further next Friday and the onshore flow
begins to reassert itself. The marine layer and the attendant
marine layer stratus will begin to redevelop. MAX temps will fall
another 2 to 5 degrees.

Still tracking a tropical system forecast to develop around
southern baja california Friday and move to the north. The
moisture and swell from this system could affect SRN ca's weather
during the week of the 26th.

Aviation 17 0619z.

At 0430z at klax, the marine layer was around 1300 feet deep. The
top of the inversion was around 3500 feet with a temperature of 25
degrees celsius.

Good confidence in 06z desert tafs and moderate confidence in
timing for coastal and valley tafs.VFR transition could be
delayed by up to an hour.

Klax... Moderate confidence in taf. Clearing could occur as late as
19z. There is a 30% chance of a 6 kt east wind component between
10z and 15z.

Kbur... Moderate confidence in taf. Clearing could occur as late as
18z.

Marine 17 322 am.

For the outer waters, moderate to high confidence in current
forecast. There is high confidence in winds and seas remaining
below small craft advisory (sca) levels today through Sunday.

There is a 70% chance of SCA level winds over all of the outer
waters on Tuesday through at least Wednesday. There is a 50%
chance that SCA conditions may develop as early as Monday
afternoon or evening, especially over the southern outer waters.

For the inner waters north of point sal, moderate to high
confidence in current forecast. There is high confidence that
winds and seas will remain below SCA levels today through Monday.

There is a 60% chance of SCA level winds during the afternoon and
evening hours of Tuesday and Wednesday.

For the inner waters south of point conception, moderate to high
confidence in current forecast. In general, there is high
confidence that winds and seas will remain below SCA levels
today through Wednesday. The only exception will be the western
half of the santa barbara channel where there is a 60% chance of
sca level winds during the late afternoon and evening hours Monday
through Wednesday.

Lox watches warnings advisories
Ca... None.

Pz... None.

Hazard potential outlook (mon-fri)
Hot temperatures could lead to heat advisories for some inland
areas next Wednesday and possibly Thursday. Otherwise, no
significant hazards are expected through the period.

Public... Rorke
aviation... Stewart rorke
marine... Stewart ck
synopsis... Phillips
weather.Gov losangeles


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
CPXC1 20 mi35 min E 2.9 G 4.1 58°F 1009.9 hPa57°F
46215 - Diablo Canyon, CA (076) 20 mi59 min 56°F4 ft
PSLC1 - 9412110 - Port San Luis, CA 20 mi59 min E 1.9 G 1.9 58°F 59°F1013.1 hPa
46011 - SANTA MARIA - 21 NM Northwest of Point Arguello, CA 39 mi39 min 58°F 59°F6 ft1012.2 hPa (+0.0)

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, CA15 mi93 minESE 74.00 miFog/Mist57°F55°F96%1012.1 hPa
Paso Robles Municipal Airport, CA16 mi96 minN 010.00 miFair54°F52°F93%1010.7 hPa

Link to 5 minute data for KSBP

Wind History from SBP (wind in knots)
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Last 24hrCalmS5SE4S54SW8SW6SW5S7SW54353CalmSE6SE4SW3CalmS5E5SE6E7E6
1 day agoCalmCalmNE3CalmCalmW6W7NW6W6W6W6NW8W5NW4W3CalmCalmCalmCalmCalmCalmS3SE4SE3
2 days agoSE4SE4SE44CalmW6NW6NW8W6NW9W6W4W4W4CalmSW3CalmCalmW3CalmCalmCalmCalmS3

Tide / Current Tables for Morro Beach, Estero Bay, California (2)
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Morro Beach
Click for Map
Sat -- 06:10 AM PDT     0.13 feet Low Tide
Sat -- 06:24 AM PDT     Sunrise
Sat -- 08:15 AM PDT     Moonset
Sat -- 12:31 PM PDT     4.18 feet High Tide
Sat -- 05:51 PM PDT     1.86 feet Low Tide
Sat -- 07:50 PM PDT     Sunset
Sat -- 09:23 PM PDT     Moonrise
Sat -- 11:51 PM PDT     5.12 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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5.34.73.72.51.30.50.10.30.91.92.93.74.14.13.83.12.521.92.12.73.64.44.9

Tide / Current Tables for Morro Beach, Estero Bay, California
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Morro Beach
Click for Map
Sat -- 06:10 AM PDT     0.13 feet Low Tide
Sat -- 06:24 AM PDT     Sunrise
Sat -- 08:15 AM PDT     Moonset
Sat -- 12:31 PM PDT     4.18 feet High Tide
Sat -- 05:50 PM PDT     1.86 feet Low Tide
Sat -- 07:50 PM PDT     Sunset
Sat -- 09:23 PM PDT     Moonrise
Sat -- 11:52 PM PDT     5.12 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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5.34.73.72.51.30.50.10.30.91.92.93.74.14.13.83.12.521.92.12.73.64.44.9

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 (9,2,3,4)
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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.