Thursday, February22, 2018 L-36.com


Marine Weather and Tides
Morro Bay, CA

Version 3.4
What's New / NOTES
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 6:38AMSunset 5:53PM Thursday February 22, 2018 2:39 AM PST (10:39 UTC) Moonrise 10:55AMMoonset 12:00AM Illumination 46% 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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PZZ670 Point Piedras Blancas To Point Sal From 10 To 60 Nm- 210 Am Pst Thu Feb 22 2018
.gale warning in effect from this afternoon through late tonight...
Today..NW winds 10 to 15 kt, becoming 20 to 30 kt with gusts to 35 kt in the afternoon. Combined seas 5 to 6 ft dominant period 14 seconds. Slight chance of showers in the afternoon.
Tonight..NW winds 20 to 30 kt with gusts to 35 kt. Combined seas 9 to 10 ft dominant period 8 seconds. Slight chance of showers.
Fri..NW winds 15 to 25 kt with gusts to 30 kt. Combined seas 8 to 10 ft dominant period 10 seconds.
Fri night..NW winds 20 to 30 kt, becoming N 10 to 20 kt with gusts to 25 kt after midnight. Strongest western portion. Combined seas 9 to 10 ft dominant period 10 seconds, subsiding to 6 to 7 ft dominant period 10 seconds after midnight.
Sat..N winds 10 to 20 kt, becoming nw 15 to 25 kt with gusts to 30 kt in the afternoon. Combined seas 6 to 7 ft dominant period 9 seconds, building to 11 ft dominant period 9 seconds in the afternoon.
Sat night..NW winds 20 to 30 kt with gusts to 35 kt. Combined seas 8 to 10 ft dominant period 8 seconds.
Sun..NW winds 15 to 25 kt with gusts to 30 kt. Combined seas 7 to 9 ft.
Mon..NW winds 15 to 25 kt with gusts to 30 kt. Combined seas 6 to 8 ft. Slight chance of showers.
PZZ600 210 Am Pst Thu Feb 22 2018
Synopsis for the southern california coast and santa barbara channel including the channel islands national marine sanctuary and national park..At 09z...or 1 am pst...a 1040 mb high was 800 nm W of seattle and a 1017 mb low was near las vegas.

7 Day Forecast for Marine Location Near Morro Bay city, CA
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location: 35.39, -120.93     debug


Area Discussion for - Los Angeles/Oxnard, CA
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Fxus66 klox 220541
afdlox
area forecast discussion... Updated
national weather service los angeles oxnard ca
941 pm pst Wed feb 21 2018

Synopsis 21 921 pm.

The low may bring possible precipitation and breezy winds on
Thursday, and should keep the temperatures below normal into
Saturday. A high will move in by early next week to warm the
temperatures to normal. Then another low should bring possible
precipitation from Monday night into Tuesday night, with a cooling
trend into midweek.

Short term (wed-sat) 21 940 pm.

Another weak trough of low pressure is exiting the region tonight.

Primarily clear skies continue across the area, except for a few
clouds banked up along the northern slopes of the mountains and
over the central coast this evening. Northerly winds are close to
advisory levels across southern santa barbara county this
evening, but the gradients is starting to relax. No wind advisory
issuance is expected for tonight.

With clearing skies, radiative cooling process will become more
efficient. Most areas will see at least patchy frost across the
area, except the immediate coastal locales south of point
conception. Frost advisories were expanded into the san fernando
and santa clarita valley, the ventura county coastal valleys and
the santa monica mountains for late tonight through Thursday
morning. A freeze warning was also added for the ventura county
interior valleys.

A trough of low pressure over the pacific northwest coast will
drop south into the region through Friday. Strong onshore
pressure gradients will likely develop ahead of the trough and a
wind advisory was added for the los angeles county mountains and
the antelope valley for Thursday and Thursday evening. Wind
advisory decisions were tabled for now across the central coast
and the ventura county coast as not enough confidence exists just
yet. Future shifts could extend or expand these advisories. A
northerly pressure gradient develops in the wake of the trough and
this could impact southern santa barbara county and the interstate
5 corridor. Pops have been nudged up slightly for Thursday and
Thursday night, though most attention was paid to the frost freeze
products tonight into Thursday and winds on Thursday and Thursday
night. Pops look agreeable for now, but some touch-ups on the
wetter side could occur by future shifts.

*** from previous discussion ***
another trough, this one a little colder and wetter will come
through late Thursday into Friday morning. Like this one (and many
before it) it will take a mostly inside track through the great
basin so it doesn't have a lot of moisture to work with and mostly
west to northwest flow which isn't conducive to precip,
especially south of pt conception. Still, some pops are warranted
and it will likely sprinkle or shower in many places by early
Friday with the best chances in the north, eastern la county, and
the north facing slopes near the kern county. This include the
grapevine which should see some light snow showers Thu night into
Friday morning as the snow level will be at or just below 3000 ft.

Snow amounts likely to be 1-2" at most but impacts still expected
on interstate 5 over the grapevine and other mountain roads in
that area. Rain amounts at lower elevation expected to be a
quarter inch or less and in most areas much less.

After the second trough moves through Friday morning low level
winds will shift to north and northeast and the air mass will dry
out considerably. Likely some gusty north winds again through the
santa ynez range and the i5 corridor through Saturday morning,
with some of that filtering down into the valleys. Temps Fri about
the same as thu, though colder in the mountains and av. Then
turning warmer Saturday (though still a few degrees below normal)
as the air mass starts to rebound and light offshore flow
develops.

Long term (sun-wed) 21 142 pm.

A third trough will come through late Sat into Sun but this one
will be even farther east and its only impact will be to
strengthen offshore gradients and create some locally gusty
northeast winds and warmer temps. A fourth trough will drop south
along the coast of california Monday afternoon into early Tuesday.

Again minimal moisture to work with due to it's unfavorable
trajectory but enough to give most of the area at least a threat
of light precip by Monday night. GFS ensembles match up pretty
well with the operational GFS with best chances again north of pt
conception, eastern la county and the grapevine area. MOS guidance
favors similar temps Monday but with the strong onshore push ahead
of that night's trough at least the immediate coast should see
some cooling Monday. Then several degrees of cooling Tuesday with
any rain chances ending during the afternoon as winds shift to
north and drying begins. Slightly warmer Wednesday post-trough and
with some light offshore flow.

Aviation 22 0016z.

At 00z, the marine layer depth was around 1300 feet.

Vfr conditions are expected through at least 10z, then there is a
chance of MVFR conditions with light rain showers through the
remainder of the period. There is a chance that MVFR ceilings
could be 1000-1500 feet lower than forecast for some terminals.

There is a chance of moderate wind shear at ksba through 08z.

Moderate to strong wind shear and turbulence is possible at all
terminals after 20z.

Klax...VFR conditions are expected through at least 10z. There is
a 30 percent chance of MVFR conditions between 10z and 19z
increasing to 50 percent chance after 19z. There is a chance that
MVFR ceilings could be 1000-1500 feet lower than forecast for
some terminals. Moderate wind shear and turbulence is possible
after 20z. Any east winds will remain less than 7 knots.

Kbur...VFR conditions are expected through at least 16z. There is
a 30 percent chance of MVFR conditions between 16z and 19z
increasing to 50 percent chance after 19z. There is a chance that
MVFR ceilings could be 1000-1500 feet lower than forecast for
some terminals. Moderate to strong wind shear and turbulence is
possible after 20z. There is a 20 percent chance of cross winds
greater than 10 knots after 20z.

Marine 21 839 pm.

For the outer waters, moderate confidence in the current
forecast. Locally gusty winds near point conception are expected
to subside overnight. Winds will likely increase to advisory
levels again Thursday afternoon, with a good chance of gales
developing late Thursday afternoon into Thursday evening. The
strong winds will persist through midnight into early morning
Friday, then return to small craft advisory levels... Which will
likely persist through the weekend. There will be a chance of
gales again late in the period.

For the inner waters, moderate confidence in current forecast.

Winds will be below small craft advisory level tonight, aside from
locally gusty winds in the western santa barbara channel. Small
craft advisory level winds are likely late Thursday afternoon and
Thursday night with local gale force gusts across the western
portions. There is a 30% chance that a gale warning will be needed
for the western portions of the inner waters.

Lox watches warnings advisories
Ca... Frost advisory in effect from 1 am to 9 am pst Thursday for
zones 34>36-45-46-88-547. (see laxnpwlox).

Wind advisory in effect from 2 pm Thursday to 4 am pst Friday
for zones 39-52. (see laxnpwlox).

Freeze warning in effect from 1 am to 9 am pst Thursday for
zone 44. (see laxnpwlox).

Wind advisory in effect from 10 am Thursday to 10 am pst
Friday for zone 54. (see laxnpwlox).

Wind advisory in effect from 10 am to 10 pm pst Thursday for
zone 59. (see laxnpwlox).

Pz... Small craft advisory in effect from 3 pm Thursday to 3 am pst
Friday for zones 645-650-655. (see laxmwwlox).

Gale watch in effect from Thursday afternoon through late
Thursday night for zones 670-673-676. (see laxmwwlox).

Hazard potential outlook (sat-wed)
Gusty advisory level winds possible through the santa ynez range
and the i5 corridor early Saturday. Low elevation snow possible
Monday night into Tuesday creating hazardous driving conditions in
the mountains, especially the i5 corridor area.

Public... Hall mw
aviation... Hall
marine... Smith
synopsis... Stu
weather.Gov losangeles


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
46215 - Diablo Canyon, CA (076) 13 mi43 min 54°F3 ft
PSLC1 - 9412110 - Port San Luis, CA 18 mi52 min Calm G 1.9 45°F 55°F1023.9 hPa
CPXC1 18 mi42 min N 5.1 G 7 44°F 1023.4 hPa38°F
46011 - SANTA MARIA - 21 NM Northwest of Point Arguello, CA 30 mi50 min NNW 9.7 G 12 52°F 55°F5 ft1023 hPa (+0.5)

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, CA19 mi44 minESE 510.00 miFair38°F30°F76%1023 hPa

Wind History from SBP (wind in knots)
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Last 24hrCalmCalmSE3SE3E3CalmCalmCalmW35W11NW16NW14NW16NW13NW9NW8W3W5W4CalmCalmSE3E5
1 day agoW5W7W5CalmNW9CalmN9NW10NW9N8NW12NW18NW16NW17NW17
G24
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2 days agoCalmCalmCalmCalmE3SE3CalmN9W8NW16
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Tide / Current Tables for Morro Beach, Estero Bay, California
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Morro Beach
Click for Map
Thu -- 02:17 AM PST     4.36 feet High Tide
Thu -- 06:41 AM PST     Sunrise
Thu -- 09:32 AM PST     1.14 feet Low Tide
Thu -- 10:55 AM PST     Moonrise
Thu -- 03:34 PM PST     2.74 feet High Tide
Thu -- 05:52 PM PST     Sunset
Thu -- 08:25 PM PST     1.89 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
3.64.14.34.33.93.32.621.41.21.21.41.82.22.52.72.72.62.32.11.91.92.22.6

Tide / Current Tables for Port San Luis, Pacific Ocean, California
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Port San Luis
Click for Map
Thu -- 02:14 AM PST     4.88 feet High Tide
Thu -- 06:41 AM PST     Sunrise
Thu -- 09:28 AM PST     1.02 feet Low Tide
Thu -- 10:54 AM PST     Moonrise
Thu -- 03:35 PM PST     3.08 feet High Tide
Thu -- 05:52 PM PST     Sunset
Thu -- 08:23 PM PST     2.06 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
44.64.94.84.33.62.821.41.11.11.41.82.42.833.12.92.62.32.12.12.42.9

Weather Map and Satellite Images
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Weather Map
wmap_P
IR Satellite Image from GEOS
west_satellite

GOES Local Image of Southwest    EDIT
Geos

Wind Forecast for Los Angeles/Oxnard, CA (5,6,7,8)
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Ground Weather Radar Station Vandenberg AFB, CA
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weather_mapweather_map weather_map

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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.