Marine Weather and Tides
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 7:09AM||Sunset 5:16PM||Tuesday January 16, 2018 11:24 AM PST (19:24 UTC)||Moonrise 6:51AM||Moonset 5:13PM||Illumination 0%|
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|PZZ645 Point Piedras Blancas To Point Sal Westward Out To 10 Nm- 906 Am Pst Tue Jan 16 2018 |
.small craft advisory for hazardous seas in effect through late Wednesday night...
Today..NW winds 10 to 15 kt. Wind waves 2 ft or less. W swell 12 to 13 ft at 15 seconds. Patchy dense fog with vsby 1 nm or less.
Tonight..NW winds 10 to 15 kt in the evening, becoming 5 to 10 kt. Wind waves 2 ft or less. W swell 12 to 13 ft at 16 seconds.
Wed..Winds variable 10 kt or less, becoming nw 10 to 15 kt in the afternoon. Wind waves 2 ft or less. W swell 11 to 12 ft at 15 seconds, subsiding to 9 to 10 ft at 15 seconds in the afternoon.
Wed night..NW winds 10 to 15 kt in the evening, becoming 5 to 10 kt. Wind waves 2 ft or less. NW swell 8 to 10 ft at 17 seconds.
Thu..NW winds 5 to 10 kt. Wind waves 2 ft or less. W swell 7 to 8 ft at 20 seconds, building to 11 to 14 ft at 20 seconds in the afternoon. Slight chance of rain in the afternoon.
Thu night..NW winds 10 to 15 kt. Wind waves 2 ft or less. W swell 14 to 17 ft at 19 seconds. Chance of rain.
Fri..NW winds 15 to 25 kt with gusts to 30 kt. Combined seas 13 to 16 ft. Chance of rain.
Sat..NW winds 15 to 20 kt with gusts to 25 kt. Combined seas 11 to 14 ft.
|PZZ600 906 Am Pst Tue Jan 16 2018 |
Synopsis for the southern california coast and santa barbara channel including the channel islands national marine sanctuary and national park..At 17z...or 9 am pst...a 1024 mb high was located near san francisco. A 1018 mb low was centered in se california. A large, long period nw swell will affect the waters tonight through Wed night. An even larger nw swell may affect the waters Thu through Sat.
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 161904|
area forecast discussion
national weather service los angeles oxnard ca
1104 am pst Tue jan 16 2018
An approaching upper level trough from the northwest of the area
will increase the onshore flow for more clouds and cooler
temperatures today. A storm system will spread the possibility of
precipitation from the northwest Thursday afternoon and evening,
then spreading into all areas by early Friday. A few lingering
showers and low snow levels expected through early Saturday. Cool
and dry conditions expected through the remainder of the weekend.
Potential for periods of additional rain early next week.
Short term (tdy-thu)
quiet weather pattern through at least the first part of Thursday.
A lot of high clouds and possibly some patchy dense fog at times
near the coast but otherwise not much going on in the weather
department. The next system coming in late Thu and Fri looks super
weak and it may not even drop measurable rain south of pt
conception, and if it does it will be under a tenth of an inch.
Still looks like gusty winds behind it Friday afternoon and
***from previous discussion***
for Thursday, the shortwave ridge will begin to breakdown as the
upper trough approaches southern california. Latest models have
slowed the approach of what will be a very weak system. But once
it arrives, it will push through quickly as 850 mb winds will be
out of the nw. Light rain will move in across the NW portion of
the central coast initially by late Thursday morning or afternoon,
then overspread to the south into la county by late Thursday
night or early Friday morning. Snow levels will be between 7000 -
8000 ft through Thursday night then drop to around 4,000 ft by
Friday mid morning. With the wind profile mainly out of the nw
direction, rain totals will be quite light. Have lowered the qpf
to less than a quarter inch for slo county and much lighter to
the south. High temps will be around 4 degrees cooler from
Wednesday for most areas, with a few degrees of warming across the
Rainfall is expected to remain light across montecito Thu fri
with a tenth of an inch or less expected.
Long term (fri-mon)
both the GFS and ECMWF continue to be in decent agreement with
large scale features through Monday before going out of phase on
Tuesday. For Friday morning, a weak cold front will continue to
bring some light rain across the region. As the front moves
through, the snow level will drop from 7000 ft Thu evening to
4000 ft by Friday mid morning. Most the showers will be very
light. But the northerly winds will help to pile up clouds across
the northern slopes above the grapevine, which should cause snow
flurries to continue through much of Friday into Friday evening.
It will be cold enough to potentially cause some hazardous
driving conditions across the i-5 corridor above the grapevine.
Snow amounts should be 2-4 inches for areas above 5,000 ft with
this next system.
Temperatures will be plummeting on Friday with valleys and
interior areas lowering 10 to 20 degrees with coastal areas down 8
to 10 degrees from Thursday. Highs across the low-lands will be
in the upper 50s to lower 60s on Friday, with just a few degrees
of warming on Saturday. Sundowner winds are expected to develop
Friday afternoon through early Saturday morning across sba county
and across the la vtu county mtns and antelope valley as well. It
will remain quite cool on Sat with a few lingering showers across
the northern slopes of the ventura county mtns. Weak offshore flow
will set up briefly Sat evening into Sunday morning, with some
limited warming expected. It will continue to be quite cool
overall, but highs should be in the upper 60s for coast and
valleys with partly cloudy skies.
Both models are hinting at another system to move into the
northern portion of the forecast area Monday then spreading into
the entire forecast area. The GFS is much more bullish and keeps
the trough over the region longer, allowing precip to continue
through wed. It is too early to get a good handle on what this
system will actually going to do, but as we draw closer to the
weekend, we should start getting an idea of some preliminary
precip amounts to expect. People in the montecito area should
remain aware for the potential of more extended periods of rain.
Aviation 16 1800z.
At 1645z at klax, there marine layer was around 300 ft deep. The
top of the inversion was around 2100 ft with a temperature of
Very low confidence in the 18z coastal tafs. Good confidence in
the 18z valley tafs. The coastal TAF sites have cleared this
morning and conditions will be mostlyVFR except for some MVFR
visibility. Tonight, there is considerable doubt about the marine
clouds returning due to a weak offshore push expected tonight.
Decided to allow clouds back to the la coast, but do not be
surprised ifVFR or MVFR visibility is the result instead.
Klax... Very low confidence in the 18z taf. There is a 40 percent
chance ofVFR CIGS and MVFR vis or better through the night.
Kbur... High confidence in cavu taf.
Marine 16 900 am.
For the outer waters, high confidence in current forecast. Seas
will remain above small craft advisory (sca) levels thru Wed night,
then may briefly fall below SCA levels for a 6-12 hour period late
wed night and early thu. Then, seas will build thu, increasing thru
at least fri, with wave heights of 18 to 20 ft possible, with high
seas continuing into early next week.
Winds will be near SCA levels today and tonight, especially across
the southern two thirds of the outer waters. SCA level winds are
likely across the entire outer waters Fri thru sat, possibly
beginning as early as Thu night.
For the northern inner waters, high confidence in the forecast.
Sca conditions for hazardous seas will continue thru Wed night.
After slightly subsiding, seas will build to SCA levels again thu
and Thu night, with high seas continuing into early next week. Sca
level winds are expected Fri through sat.
For the waters south of point conception, winds will remain below
sca levels thru thu. Seas could get close to SCA levels later today
and tonight across western portions of the sba channel and western
portions of the southern inner waters. Even larger seas are expected
thu night thru sat. SCA level winds are expected Fri thru sat.
Lox watches warnings advisories
Ca... High surf advisory in effect until 6 am pst Thursday for
zones 34-35-40-41-87. (see laxcfwlox).
Pz... Small craft advisory for hazardous seas in effect until 3 am
pst Thursday for zones 645-670. (see laxmwwlox).
Small craft advisory in effect until 3 am pst Thursday for
zones 673-676. (see laxmwwlox).
Hazard potential outlook (thu-mon)
possible winter weather issues for the i-5 near the grapevine
Friday night. Otherwise, no significant hazards expected.
Public... Mw kaplan
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||57 min||61°F||9 ft|
|PSLC1 - 9412110 - Port San Luis, CA||34 mi||54 min||SSE 8 G 8.9||57°F||58°F||1023.8 hPa|
|CPXC1||35 mi||34 min||S 2.9 G 4.1||58°F||1023.4 hPa||53°F|
|46028 - CAPE SAN MARTIN - 55NM West Northwest of Morro Bay, CA||40 mi||94 min||NW 5.8 G 9.7||57°F||57°F||10 ft||1023.2 hPa (+1.3)|
|46011 - SANTA MARIA - 21 NM Northwest of Point Arguello, CA||43 mi||94 min||NW 12 G 16||56°F||58°F||11 ft||1022.9 hPa (+1.0)|
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
Wind History from PRB (wind in knots)
|1 day ago||S||SW||Calm||Calm||NW||N||NW||N||NW||Calm||Calm||NW||NW||NW||NW||NW||NW||NW||NW||NW||NW||NW||NW|
|2 days ago||E||E||E||Calm||E||NE||SE||S|
EDIT RT Ports Option Weekend mode (on/off) (on/off)  Help One Week of Data
|San Simeon |
Click for Map
Tue -- 02:54 AM PST 2.49 feet Low Tide
Tue -- 06:51 AM PST Moonrise
Tue -- 07:13 AM PST Sunrise
Tue -- 09:02 AM PST 5.71 feet High Tide
Tue -- 04:20 PM PST -0.56 feet Low Tide
Tue -- 05:12 PM PST Moonset
Tue -- 05:16 PM PST Sunset
Tue -- 06:18 PM PST New Moon
Tue -- 11:01 PM PST 3.79 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
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|Morro Beach |
Click for Map
Tue -- 03:01 AM PST 1.99 feet Low Tide
Tue -- 06:48 AM PST Moonrise
Tue -- 07:11 AM PST Sunrise
Tue -- 09:13 AM PST 5.61 feet High Tide
Tue -- 04:24 PM PST -0.56 feet Low Tide
Tue -- 05:12 PM PST Moonset
Tue -- 05:15 PM PST Sunset
Tue -- 06:18 PM PST New Moon
Tue -- 10:51 PM PST 3.60 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Weather Map and Satellite Images(on/off)  Help
|Weather Map ||IR Satellite Image from GEOS|
GOES Local Image of Southwest EDIT
Wind Forecast for Los Angeles/Oxnard, CA (14,3,4,5)(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.