Saturday, February24, 2018 L-36.com


Marine Weather and Tides
Pismo Beach, 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 6:35AMSunset 5:55PM Saturday February 24, 2018 7:32 AM PST (15:32 UTC) Moonrise 12:31PMMoonset 1:57AM Illumination 69% Phase: Waxing Gibbous; Moon at 9 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
    EDIT      (on/off)   Help
PZZ645 Point Piedras Blancas To Point Sal Westward Out To 10 Nm- 212 Am Pst Sat Feb 24 2018
.small craft advisory in effect from this afternoon through this evening...
Today..Winds variable 10 kt or less, becoming nw 15 to 25 kt with gusts to 30 kt in the afternoon. Combined seas 5 to 6 ft dominant period 16 seconds.
Tonight..NW winds 15 to 25 kt with gusts to 30 kt in the evening, becoming 10 to 20 kt with gusts to 25 kt. Combined seas 5 to 7 ft dominant period 15 seconds.
Sun..N winds 10 to 15 kt, becoming nw 15 to 25 kt in the afternoon. Combined seas 4 to 5 ft dominant period 15 seconds.
Sun night..NW winds 15 to 25 kt. Combined seas 4 to 5 ft dominant period 15 seconds.
Mon..NW winds 10 to 15 kt, becoming 15 to 25 kt with gusts to 30 kt in the afternoon. Combined seas 4 to 6 ft dominant period 12 seconds. Chance of showers in the afternoon.
Mon night..NW winds 15 to 25 kt with gusts to 30 kt in the evening, becoming 10 to 15 kt. Combined seas 6 to 7 ft dominant period 10 seconds, building to 8 to 10 ft dominant period 11 seconds after midnight. Chance of showers.
Tue..NW winds 15 to 25 kt. Combined seas 7 to 10 ft.
Wed..NW winds 15 to 20 kt with gusts to 25 kt. Combined seas 6 to 7 ft.
PZZ600 212 Am Pst Sat Feb 24 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 1039 mb high was 1100 nm nw of point conception.

7 Day Forecast for Marine Location Near Pismo Beach, CA
   Hourly   EDIT   Help
location: 35.03, -120.79     debug


Area Discussion for - Los Angeles/Oxnard, CA
      (on/off)   Help   NOTE: mouseover dotted underlined text for definition
Fxus66 klox 241301
afdlox
area forecast discussion
national weather service los angeles oxnard ca
501 am pst Sat feb 24 2018

Synopsis 24 447 am.

It will be dry this weekend with a warming trend, with daytime
temperatures near normal by Sunday. It will be breezy to windy at
times through early Sunday. An upper low will bring a good chance
of rain showers and mountain snow showers to the region late
Monday through Tuesday morning. Another upper system may bring
more significant rain and mountain snow to the region Thursday
afternoon through Friday.

Short term (tdy-mon) 24 457 am.

Clear skies across the forecast area this morning. It was cold,
especially where winds have dropped off since clear skies and low
dew points were providing excellent radiational cooling conditions.

Frost advisories freeze warnings were in effect for coastal and
valley areas, except a hard freeze warning was in effect for the
santa ynez valley. No advisory is in effect for the l.A. County
coast, where only isolated frost is just a remote possibility in
the coldest locations away from coast. Under brilliant late
february sunshine, temps should rise quickly this morning, and
although it should be noticeably warmer than yesterday, MAX temps
will still be a few degrees below normal in most areas.

A short wave trough will drop from the pac NW into the great basin
this afternoon. This will bring a reinforcing shot of strong
northwest winds aloft to the region. At the same time, an area of
subsidence will sweep across the region. Expect NW winds to
increase to advisory levels across the central coast this
afternoon, and across the mtns of l.A. And vtu counties, mainly
near the interstate 5 corridor. Gusty west to northwest winds will
likely also reach advisory levels in the antelope valley. Wind
advisories have been issued for these areas.

Elsewhere, NW winds could approach advisory levels across the
santa ynez range and adjacent south coast of sba county this
afternoon and evening. West winds could get close to advisory
levels across coastal sections of vtu l.A. Counties, mainly near
the coast. Winds will diminish in most coastal areas this evening,
but should stay up through late tonight in the antelope valley.

Gusty north winds will likely push into the valleys of eastern vtu
county and the western and northern valleys of l.A. County
tonight as the low level flow turns more northerly.

The airmass across the region will be slightly less cold tonight,
and there should be a bit more in the way of wind. Expect frost
and freeze conditions to be much less widespread, although frost
advisories may be needed on the central coast and in the ojai
valley. Low level flow will turn more northeasterly Sunday
morning, and winds will diminish. Heights and thicknesses will
rise across the region on Sunday. MAX temps should rise several
more degrees, possibly reaching normal levels in many areas.

The models are in fairly good agreement with the next system that
will likely affect the area, all showing a trough digging through
the pacific northwest Sun night, with the trough axis sharpening
and sliding southward along the coast mon, evolving into a closed
low either across or just to the west of slo county by late mon
evening. Clouds will increase mon, and there is a good chance of
showers across slo sba counties in the afternoon, with showers
becoming likely across northwestern slo county late in the day.

Max temps will be down several degrees in most areas mon.

There is a good chance of showers across the entire forecast area
Monday night. The ec continues to be stronger, colder and farther
west with this system, gaining a bit more moisture due to some
mid level onshore flow off the pacific. The WRF is almost exactly
a compromise between the ec and GFS with the position and track of
the upper low, but more similar in strength to the ec. Snow
levels should be rather low, generally between 3500 and 4500 feet
for much of its duration, possibly down to 3000 feet. It does not
look like a huge precip producer for the region, but with such
cold air aloft and marginal instability so close to the forecast
area, there is the threat of some heavier showers Monday night. In
general, would expect two to four tenths of an inch of rain in
most areas, with the highest totals likely across slo and sba
counties and across eastern l.A. County. Locally higher totals are
possible if heavier showers develop.

Long term (tue-fri) 24 446 am.

The upper low will pull to the east of the region Tuesday. There
could be some lingering showers across los angeles and ventura
counties in the morning. Otherwise, it will be partly cloudy,
breezy and cool. Dry zonal flow will set up across the area tue
night and wed. After another cold night Tue night, with possible
frost and freezes, MAX temps on Wed will rise several degrees
from those on tue, but remain well below normal.

Both the ec and the GFS show a very strong upper low approaching
the pacific NW Wed night and Thu with a sharpening trough extending
southward to the west of the forecast area, and a strong jet sagging
southward. Both models show good low and mid level southwesterly
flow and warm advection thu, with warm frontal development across
slo and sba counties Thu morning. This will bring an increasing
chance of rain to slo and sba counties there during the late
morning and afternoon, with a chance of rain pushing southward
into los angeles county toward evening. Both models show the
elongated upper low and trough taking on a negative tilt Thu night
and fri. However, the ec is about 200 miles farther south with
the parent low, and has a more favorable jet pattern and mid level
onshore flow pattern. It looks likely that there will be rain
across the region Thu night and fri, with showers possibly
continuing into Fri night or early sat. A very early rainfall
estimate from this system is for one half inch to one inch in most
coastal and valley areas, and 1 to 2 inches in the mountains.

However, this is a very low confidence forecast since the models
have been struggling with this system. Snow levels would be higher
with system than its predecessors.

Aviation 24 1059z.

At 1100z, there was no marine inversion at klax.

Overall, high confidence in 12z TAF package as all sites are
expected to remain atVFR levels. There will be some localized
offshore winds this morning which could result in some light
llws turbulence across the valleys and mountains.

Klax... High confidence in 12z taf. Any east winds this morning
will remain below 7 knots.

Kbur... High confidence in 12z taf. There is a 20% of light
llws turbulence 12z-22z.

Marine 24 259 am.

For the outer waters, high confidence in current forecast. Small
craft advisory (sca) level northwesterly winds will continue today
through Wednesday. There is a 30% chance of gale force gusts this
afternoon evening and again Monday afternoon night.

For the inner waters, high confidence in current forecast. For the
waters north of point sal, SCA level northwest winds are expected
each afternoon evening from today through Wednesday. For the
waters south of point conception, there is a 70% chance of sca
level winds this afternoon evening. From Monday night through
Wednesday, there is a 60% chance of SCA level winds, especially
across western sections.

Lox watches warnings advisories
Ca... Freeze warning in effect until 9 am pst this morning for
zones 34-35-44-46. (see laxnpwlox).

Wind advisory in effect from 1 pm this afternoon to 9 pm pst
this evening for zones 34-35. (see laxnpwlox).

Hard freeze warning in effect until 9 am pst this morning for
zone 36. (see laxnpwlox).

Frost advisory in effect until 9 am pst this morning for
zones 39-40-45-88-547. (see laxnpwlox).

Wind advisory in effect from 1 pm this afternoon to 10 am pst
Sunday for zones 53-54. (see laxnpwlox).

Wind advisory in effect from 1 pm this afternoon to 3 am pst
Sunday for zone 59. (see laxnpwlox).

Pz... Small craft advisory in effect from 2 pm this afternoon to 9
pm pst this evening for zones 645-650-655. (see laxmwwlox).

Small craft advisory in effect from 2 pm this afternoon to 3
am pst Sunday for zones 670-673-676. (see laxmwwlox).

Hazard potential outlook (mon-fri)
Low elevation snow is possible Monday night into Tuesday creating
hazardous driving conditions in the mountains, especially across
the interstate 5 corridor. There could be frost or freeze across
the region Tuesday night and early wed. A more significant storm
system may bring rain to the region Thursday into Friday.

Public... Db
aviation... Rat
marine... Rat
synopsis... Db
weather.Gov losangeles


Weather Reporting Stations
   EDIT       (on/off)   Help   NOTE: Click on distance to see the station location on a map
Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
PSLC1 - 9412110 - Port San Luis, CA 10 mi44 min N 7 G 8.9 45°F 54°F1030.3 hPa
CPXC1 10 mi32 min NNE 8 G 8.9 43°F 1030 hPa
46215 - Diablo Canyon, CA (076) 13 mi65 min 52°F5 ft
46011 - SANTA MARIA - 21 NM Northwest of Point Arguello, CA 13 mi42 min N 12 G 14 50°F 54°F7 ft1029.2 hPa (+0.8)
PTGC1 - Point Arguello, CA 32 mi32 min N 11 G 12 43°F 1028.7 hPa (+0.7)
HRVC1 39 mi44 min 47°F 1028 hPa
46218 - Harvest, CA (071) 40 mi62 min 55°F8 ft

Wind History for Port San Luis, CA
(wind in knots)    EDIT      (on/off)   Help
8
AM
9
AM
10
AM
11
AM
12
PM
1
PM
2
PM
3
PM
4
PM
5
PM
6
PM
7
PM
8
PM
9
PM
10
PM
11
PM
12
AM
1
AM
2
AM
3
AM
4
AM
5
AM
6
AM
7
AM
Last
24hr
NE7
N9
G13
N11
G18
N11
G16
NW8
G19
NE12
G19
W17
G24
W14
G21
NW7
G16
W12
G17
W15
G24
NW5
NW5
G8
N5
G8
N5
N5
N9
G12
N10
G17
N14
G17
N15
N14
G18
N13
G16
N12
G16
NE6
G9
1 day
ago
NE2
SE3
S2
W5
G11
NW14
G21
NW12
G17
W13
G22
NW10
G18
NW9
G25
NW7
G17
NW6
G22
NW2
G14
NW7
G13
NW5
G14
N7
G19
NW10
G17
NW8
G16
NW12
G19
NW7
G17
NW6
G15
NW6
G11
N3
NE7
N3
2 days
ago
E2
NE1
G4
SE4
S6
W6
G14
SW11
G15
W13
G18
W13
G18
W16
W14
W12
NW4
G8
NW2
NW2
SW1
W1
N5
--
--
--
--
N3
N2
NE2

Airport Reports
    EDIT      (on/off)   Help   Click EDIT to display multiple airports
AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
San Luis Obispo, San Luis Obispo County-Mc Chesney Field, CA17 mi36 minN 010.00 miFair39°F19°F46%1029.6 hPa
Santa Maria Public Airport/Capt G Allan Hancock Field, CA20 mi41 minN 910.00 miFair39°F19°F45%1029.7 hPa
Lompoc, Vandenberg Air Force Base, CA23 mi34 minSE 78.00 miFair36°F17°F47%1029 hPa

Wind History from SBP (wind in knots)
8
AM
9
AM
10
AM
11
AM
12
PM
1
PM
2
PM
3
PM
4
PM
5
PM
6
PM
7
PM
8
PM
9
PM
10
PM
11
PM
12
AM
1
AM
2
AM
3
AM
4
AM
5
AM
6
AM
7
AM
Last 24hrCalmN9N9N6N11
G17
NW12
G19
N12
G19
W16NW15
G23
NW18
G23
NW13NW4NE4CalmNE43N5W4SE43N8CalmSE3Calm
1 day agoCalmCalmCalmNW12W16W16
G22
W15
G21
W16W17NW17
G26
NW20
G26
NW10NW6W5--CalmS5CalmNW3E3E3E5Calm3
2 days agoCalmCalmCalmW35W11NW16NW14NW16NW13NW9NW8W3W5W4CalmCalmSE3E5SE5CalmCalmE6E3

Tide / Current Tables for Avila, California
   EDIT   RT Ports Option   Weekend mode (on/off)   (on/off)   Help   One Week of Data
Avila
Click for Map
Sat -- 01:57 AM PST     Moonset
Sat -- 04:19 AM PST     2.52 feet High Tide
Sat -- 06:38 AM PST     Sunrise
Sat -- 11:44 AM PST     -2.60 feet Low Tide
Sat -- 12:30 PM PST     Moonrise
Sat -- 05:54 PM PST     Sunset
Sat -- 06:12 PM PST     0.71 feet High Tide
Sat -- 10:55 PM PST     -0.65 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
00.81.52.22.52.41.91.10-1.1-1.9-2.5-2.6-2.3-1.6-0.8-00.50.70.60.3-0.2-0.5-0.6

Tide / Current Tables for Port San Luis, Pacific Ocean, California
   EDIT      (on/off)   Help   One Week of Data
Port San Luis
Click for Map
Sat -- 01:57 AM PST     Moonset
Sat -- 04:20 AM PST     5.28 feet High Tide
Sat -- 06:38 AM PST     Sunrise
Sat -- 11:59 AM PST     -0.01 feet Low Tide
Sat -- 12:31 PM PST     Moonrise
Sat -- 05:54 PM PST     Sunset
Sat -- 06:45 PM PST     3.39 feet High Tide
Sat -- 11:01 PM PST     2.45 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
3.13.74.455.35.24.73.92.81.80.80.2-00.20.81.52.32.93.33.43.22.92.62.5

Weather Map and Satellite Images
       (on/off)   Help
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 (10,2,3,4)
      (on/off)   Help

Ground Weather Radar Station Vandenberg AFB, CA
   (on/off)   Help
weather_mapweather_map weather_map

Ad by Google

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.