Marine Weather and Tides
5/20/2018 -- NOAA is having problems with the data feed that I use to draw the graphs. They are aware of the issue and working to resolve it. Sometimes changing the location by about a mile will give a correct graph. 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.
|Sunrise 5:46AM||Sunset 8:23PM||Thursday June 21, 2018 1:07 AM PDT (08:07 UTC)||Moonrise 1:28PM||Moonset 12:55AM||Illumination 54%|
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|PZZ670 Point Piedras Blancas To Point Sal From 10 To 60 Nm- 804 Pm Pdt Wed Jun 20 2018 |
.small craft advisory in effect through Saturday morning...
Tonight..NW winds 15 to 25 kt with gusts to 30 kt. Combined seas 7 to 8 ft dominant period 7 seconds. Patchy fog.
Thu..NW winds 15 to 25 kt with local gusts to 30 kt. Strongest western portion. Combined seas 7 to 8 ft dominant period 8 seconds. Patchy fog in the morning.
Thu night..NW winds 15 to 25 kt with gusts to 30 kt. Combined seas 7 to 9 ft dominant period 9 seconds. Patchy fog.
Fri..NW winds 15 to 25 kt with gusts to 30 kt. Combined seas 8 to 9 ft dominant period 10 seconds. Patchy fog in the morning.
Fri night..NW winds 15 to 25 kt with gusts to 30 kt. Combined seas 7 to 9 ft dominant period 10 seconds. Patchy fog.
Sat..NW winds 15 to 25 kt with gusts to 30 kt, becoming 10 to 15 kt in the afternoon. Combined seas 7 to 8 ft dominant period 10 seconds. Patchy fog in the morning.
Sat night..NW winds 10 to 15 kt. Wind waves 2 ft or less. NW swell 6 to 7 ft at 10 seconds. Patchy fog after midnight.
Sun..S winds 5 to 10 kt. Wind waves 2 ft or less. NW swell 5 to 6 ft. Patchy fog.
Mon..NW winds 10 to 15 kt. Wind waves 2 ft or less. NW swell 5 to 6 ft. Patchy fog.
|PZZ600 804 Pm Pdt Wed Jun 20 2018 |
Synopsis for the southern california coast and santa barbara channel including the channel islands national marine sanctuary and national park..At 02z...or 7 pm pdt...a 1024 mb high was located about 600 nm west of point conception. A 1005 mb thermal low was centered near needles. This pattern is expected to change little through Fri.
7 Day Forecast for Marine Location Near Cambria, CAHourly EDIT Help
Area Discussion for - Los Angeles/Oxnard, CA  (on/off)  Help NOTE: mouseover dotted underlined text for definition
|Fxus66 klox 210417|
area forecast discussion... Updated
national weather service los angeles oxnard ca
917 pm pdt Wed jun 20 2018
Synopsis 20 916 pm.
An upper-level high pressure system over the region will persist
into early next week for temperatures above normal and fair skies.
Night through morning low clouds and fog with a shallow marine
layer will moderate conditions along the coast. A slight cooling
trend will occur as onshore flow increases and the marine layer
expands early next week.
Short term (tnt-sat) 20 914 pm.
An upper-level ridge of high pressure remains centered over the
sonoran desert along the arizona-mexico border, while an upper-
level trough of low pressure tracks over the state of oregon
tonight. With the trough brushing the area to the north, onshore
flow is increasing tonight and a slightly deeper marine layer
should be in play for Thursday morning. A slight cooling should
develop Thursday, but it will hardly be noticeable as 950 mb
temperatures only cool by about a half of a degree. About a degree
or two of cooling is expected across the area. Little change is
expected near the coast where the marine layer stratus has been
persistent in hugging the coastline.
*** from previous discussion ***
heights rebound a bit Friday and gradients trend slightly
offshore so any loss in highs Thu should be regained and maybe
more Friday which should be our warmest day this week for most
Marine layer will be a constant for coastal areas and some lower
coastal valleys next several days with some clouds lingering at
some beaches through the afternoon, much like they did today.
Another trough will move into the great basin Saturday and lead to
an increase in onshore flow. Height thicknesses only drop but just
the stronger onshore flow alone should bring a few degrees of
cooling to most areas.
Long term (sun-wed) 20 142 pm.
Ridging persists into early next week but a strong onshore trend,
both south north and west east will push the cooler maritime air
well inland starting Sunday and last through the middle of next
week. As a result highs will fall back down to normal levels
Sunday Monday with minimal changes through Wednesday. Low clouds
will push farther into the valleys but clear to the coast by mid
to late morning.
Aviation 21 0003z.
At 23z, the marine layer depth was around 1400 feet deep at klax.
The top of the inversion was around 2950 feet with a temperature
near 29 degrees celsius.
Moderate confidence in the current forecast. Lifr to ifr
conditions will likely develop at most coastal terminals through
10z. There is a chance of lifr conditions at valley terminals
between 10z and 16z. Conditions should improve one category
between 15z and 16z. There is a chance of ifr to MVFR conditions
lingering into Wednesday afternoon, highest at ventura county
Klax... MVFR conditions could spread in as soon as 01z or as late
as 03z. There is a 50 percent chance of lifr conditions between
06z and 16z.VFR conditions could develop as soon as 17z or as
late as 21z Thursday. Southeast to south winds should remain below
Kbur... There is a 30 percent chance of lifr conditions between
10z and 16z.
Marine 20 740 pm.
For the outer waters, high confidence in the forecast, with sca
conds thru late Fri night or Sat morning, then winds will diminish.
Winds may drop below SCA levels briefly at times, but in general,
expect SCA level winds to prevail with steep short period seas.
For the inner waters, north of point sal, good confidence in sca
level winds mainly during the afternoon evening hours thru fri.
For the inner waters south of point conception, winds and seas
are expected to remain below SCA levels thru sun. However, there
is a 30% chance of SCA level winds across the western half of the
santa barbara channel each afternoon evening thru fri.
Lox watches warnings advisories
Pz... Small craft advisory in effect until 9 pm pdt Thursday for
zone 645. (see laxmwwlox).
Small craft advisory in effect until 9 am pdt Saturday for
zones 670-673. (see laxmwwlox).
Small craft advisory in effect until 3 am pdt Saturday for
zone 676. (see laxmwwlox).
Hazard potential outlook (sat-wed)
No significant hazards expected.
Public... Hall mw
marine... Sweet sirard
synopsis... Stu hall
Weather Reporting StationsEDIT (on/off)  Help NOTE: Click on distance to see the station location on a map
|Stations||Dist||Age||Wind||Air Temp||Water Temp||Waves||Pressure||DewPt|
|46215 - Diablo Canyon, CA (076)||29 mi||41 min||53°F||6 ft|
|PSLC1 - 9412110 - Port San Luis, CA||34 mi||50 min||NNW 1.9 G 4.1|
|CPXC1||35 mi||42 min||E 1 G 1.9||56°F||1014.6 hPa||52°F|
|46028 - CAPE SAN MARTIN - 55NM West Northwest of Morro Bay, CA||40 mi||78 min||54°F||54°F||9 ft||1013.7 hPa (+0.3)|
|46011 - SANTA MARIA - 21 NM Northwest of Point Arguello, CA||43 mi||78 min||NW 19 G 23||53°F||53°F||7 ft||1014 hPa (+0.0)|
Wind History for Port San Luis, CA(wind in knots) EDIT (on/off)  Help
Airport ReportsEDIT (on/off)  Help Click EDIT to display multiple airports
|Paso Robles Municipal Airport, CA||27 mi||75 min||WNW 7||10.00 mi||Fair||63°F||46°F||54%||1013.9 hPa|
Wind History from PRB (wind in knots)
|1 day ago||W||NW||W||Calm||Calm||Calm||Calm||Calm||Calm||NW||Calm||W||NW||NW||NW|
|2 days ago||Calm||N||NE||S||Calm||Calm||Calm||Calm||Calm||Calm||N||NW||SW||SW||NW||NW||W||NW||NW||NW||NW |
EDIT RT Ports Option Weekend mode (on/off) (on/off)  Help One Week of Data
|San Simeon |
Click for Map
Thu -- 12:11 AM PDT 1.62 feet Low Tide
Thu -- 01:54 AM PDT Moonset
Thu -- 05:38 AM PDT 3.66 feet High Tide
Thu -- 05:49 AM PDT Sunrise
Thu -- 11:45 AM PDT 0.67 feet Low Tide
Thu -- 02:27 PM PDT Moonrise
Thu -- 06:38 PM PDT 5.22 feet High Tide
Thu -- 08:23 PM PDT Sunset
Tide / Current data from XTide NOT FOR NAVIGATION
EDIT (on/off)  Help One Week of Data
|Morro Beach |
Click for Map
Thu -- 12:21 AM PDT 1.59 feet Low Tide
Thu -- 01:53 AM PDT Moonset
Thu -- 05:48 AM PDT Sunrise
Thu -- 05:51 AM PDT 3.60 feet High Tide
Thu -- 11:59 AM PDT 0.74 feet Low Tide
Thu -- 02:26 PM PDT Moonrise
Thu -- 06:49 PM PDT 4.99 feet High Tide
Thu -- 08:21 PM PDT Sunset
Tide / Current data from XTide NOT FOR NAVIGATION
Weather Map and Satellite Images(on/off)  HelpWeather Map
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.
Link to Loop
Other links: Northern Pacific Contential US Full GOES-East
Wind Forecast for Los Angeles/Oxnard, CA (4,6,7,8)(on/off)  Help
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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.