Tuesday, March28, 2017 L-36.com


Marine Weather and Tides
Pismo Beach, CA

Version 3.4
What's New / NOTES
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.
3/12/2015 - Added section for Gulf current for users in the GMZ marine zones.
This was requested by a user. If you have requests, please let me know.

Sunrise 6:51AMSunset 7:22PM Tuesday March 28, 2017 4:31 PM PDT (23:31 UTC) Moonrise 6:31AMMoonset 7:19PM Illumination 2% Phase: Waxing Crescent; Moon at 1 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- 417 Pm Pdt Tue Mar 28 2017 Update
.small craft advisory in effect until 9 pm pdt this evening...
Tonight..NW winds 15 to 25 kt with gusts to 30 kt in the evening... Becoming 10 to 15 kt with gusts to 20 kt. Combined seas 11 to 12 ft dominant period 17 seconds.
Wed..N winds 10 to 15 kt. Wind waves 1 to 3 ft. NW swell 9 to 10 ft at 16 seconds.
Wed night..NW winds 15 to 20 kt with local gusts to 25 kt in the evening...becoming N 10 to 15 kt with gusts to 20 kt. Wind waves 2 to 4 ft. W swell 9 to 10 ft at 15 seconds.
Thu..NW winds 10 to 20 kt with local gusts to 25 kt. Wind waves 3 to 5 ft. W swell 8 to 9 ft at 14 seconds.
Thu night..NW winds 20 to 30 kt with gusts to 35 kt in the evening...becoming 15 to 25 kt with gusts to 30 kt. Combined seas 10 to 13 ft dominant period 12 seconds.
Fri..NW winds 15 to 25 kt with gusts to 30 kt in the afternoon. Combined seas 9 to 11 ft dominant period 12 seconds.
Fri night..NW winds 20 to 25 kt with gusts to 35 kt in the evening...becoming N 10 to 15 kt. Combined seas 11 to 13 ft dominant period 12 seconds...subsiding to 9 to 10 ft dominant period 11 seconds after midnight.
Sat..NW winds 10 to 15 kt. Wind waves 2 ft or less. NW swell 7 to 10 ft.
Sun..NW winds 15 to 20 kt with gusts to 25 kt. Combined seas 10 to 13 ft.
PZZ600 417 Pm Pdt Tue Mar 28 2017
Synopsis for the southern california coast and santa barbara channel including the channel islands national marine sanctuary and national park..At 20z...or 1 pm pst...a 1030 mb high pressure center was located 550 nm northwest of point conception and a 1000 mb low pressure center was located over new mexico. Winds will be elevated during much of this coming week. Gales will possibly return again Thursday and Friday. Short period seas will dominate the waters due to persistent northwest winds.

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 282106
afdlox
area forecast discussion
national weather service los angeles/oxnard ca
206 pm pdt Tue mar 28 2017

Synopsis
Weakening offshore flow and ridging aloft will bring a warming
trend through Wednesday. A trough of low pressure will bring
cooler conditions by Friday with another round of gusty offshore
winds. Warmer conditions will likely return this weekend as weak
offshore flow lingers and a ridge aloft builds into the region.

Short term (tdy-fri)
north to northeast winds continue to weaken this afternoon and all
advisories will be allowed to expire. However, a new set of low
end wind advisories will be issued for southern santa barbara
county as models still show a decent gradient and winds below
850mb to justify it. Still some uncertainty on the strength of the
santa ana winds on Wednesday across la/ventura counties. The nam
was stronger today with the upper support than it was yesterday
but with the ridge building and the low and cold air air well to
the east this seems unlikely. MOS guidance is all pretty weak as
well. There may be a couple hours of near advisory level gusts in
the morning across the mtns mainly but will keep winds below
advisory levels for now. Gradients are stronger, which is not
uncommon for the second day of offshore events, and the air mass
is quite a bit warmer with the ridge aloft, so high temps should
jump several degrees from today. Low 90s expected for warmer
valleys, which would be close to record levels, and 70s and 80s
for coastal zones which probably won't be quite enough to reach
records.

On Thursday a trough will move into NRN california then move
southeast into southern nevada Thursday evening. This will result
in a rapid shift from offshore to onshore (an almost 7 mb 24 hour
trend from Wed from lax-dag), and several degrees of cooling,
especially for coast/valleys.

Another round of very gusty north winds expected behind the
trough Thu evening into Friday morning with speeds possibly
approaching the levels experienced last night.

Then gradients turn offshore again Friday, though air mass will be
quite a bit cooler so highs should be a few degrees cooler than
thu despite the offshore trends.

Long term (sat-tue)
a second day of offshore gradients Saturday will be accompanied
by a much warmer air mass as the upper low exits to the east and
the ridge builds. Highs not expected to be quite as warm Saturday
as tomorrow but still at least 10-15 degrees above normal. There
will be some northeast breezes but likely below advisory levels.

Gradients then shift to onshore Sunday that should lead to some
cooling but still at least a few degrees above normal in most
areas.

For Monday and Tuesday the GFS has shifted towards the much
weaker and progressive trough pattern that the ECMWF has been
advertising. It's been bouncing around quite a bit though so
confidence is pretty low for early next week, but if these trends
hold then it would certainly be a warmer and less windy forecast
than previously expected with no chance of rain. Bumped up highs
a few degrees but didn't want to adjust too much in case the
solutions reverts back to a cooler/windier one.

Aviation 28/1800z.

At 1703z at klax... There was no marine inversion.

High confidence inVFR conditions through the next 24 hours.

Klax... High confidence in the 18z taf.VFR conditions are
expected.

Kbur... High confidence in the 18z taf.VFR conditions are
expected.

Marine 28/200 pm.

Across the outer waters... Another gale warning continues as model
solutions project 45 kt gusts in the western sections late this
afternoon through much of tonight. It is a bit difficult to
monitor conditions in the coastal waters due to an outage of
observations. Small craft advisory winds will resume Wednesday
and continue into Wednesday night. By late Thursday, wind speeds
in the outer waters may again increase to gale warning criteria.

Across the inner waters... A SCA for hazardous seas is in effect
through this afternoon south of point conception due to steep and
choppy waves. Gale level winds may affect the inner waters on
Thursday and Friday.

Lox watches/warnings/advisories
Ca... High surf advisory in effect until 2 pm pdt Wednesday for
zones 34-35. (see laxcfwlox).

Wind advisory in effect until 3 am pdt Wednesday for zones
39-52. (see laxnpwlox).

Beach hazards statement in effect through Wednesday afternoon
for zones 40-41-87. (see laxcfwlox).

Pz... Small craft advisory in effect until 9 pm pdt this evening
for zone 645. (see laxmwwlox).

Small craft advisory for hazardous seas in effect until 3 pm
pdt this afternoon for zones 650-655. (see laxmwwlox).

Gale warning in effect until 3 am pdt Wednesday for zones
670-673-676. (see laxmwwlox).

Hazard potential outlook (fri-tue)
another round of strong and gusty northerly winds are expected
Friday.

Public... Mw
aviation... Sweet
marine... Sweet
synopsis... Munroe
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 W 18 G 20 64°F 55°F1019.6 hPa
46215 - Diablo Canyon, CA (076) 13 mi42 min 55°F8 ft
46011 - SANTA MARIA - 21 NM Northwest of Point Arguello, CA 13 mi42 min NNW 16 G 18 56°F 56°F11 ft1020.6 hPa (-0.9)
PTGC1 - Point Arguello, CA 32 mi32 min N 19 G 22 55°F 1019.3 hPa (-1.6)
HRVC1 39 mi44 min 1019.6 hPa
46218 - Harvest, CA (071) 40 mi32 min 55°F12 ft
46257 41 mi32 min 55°F12 ft

Wind History for Port San Luis, CA
(wind in knots)    EDIT      (on/off)   Help
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
8
AM
9
AM
10
AM
11
AM
12
PM
1
PM
2
PM
3
PM
4
PM
Last
24hr
NW10
G19
W11
G24
NW11
G22
NW10
G20
NW12
G16
N8
G17
NW11
NW11
G15
N10
G14
N5
G9
NW11
G14
NW5
N4
G7
N3
G6
NE7
NE2
SE4
N4
E4
G7
NW7
G14
N11
G15
W7
G15
W18
W17
G21
1 day
ago
NW5
G14
E4
SW6
G12
W6
G10
W9
NE3
NE1
G4
--
SW2
SW3
SW1
E1
N4
NW7
NW8
G13
N7
G11
N14
G21
NW14
G19
N12
G16
NW16
W12
G19
W13
G20
NW10
G27
NW13
G27
2 days
ago
NW7
G15
NW10
G13
NW14
G18
NW2
W6
G10
E1
SW1
N2
--
SE1
N4
--
E1
SW1
G6
--
E1
--
NW1
W14
G18
W16
W17
W18
W13
G17
W16
G21

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 minNW 1810.00 miFair and Breezy66°F48°F54%1018.9 hPa
Santa Maria, Santa Maria Public Airport, CA20 mi41 minWNW 186.00 miFair with Haze and Breezy63°F50°F63%1019.2 hPa
Lompoc, Vandenberg Air Force Base, CA23 mi97 minN 208.00 miA Few Clouds and Breezy60°F53°F79%1020 hPa

Wind History from SBP (wind in knots)
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
8
AM
9
AM
10
AM
11
AM
12
PM
1
PM
2
PM
3
PM
4
PM
Last 24hrNW12
G23
NW10NW11NW9NW9W4CalmNW7NW7NW11NW14N13N9NW11N8N12N8N8N8N12N9NW12
G19
NW19NW18
1 day agoNW17
G24
NW13NW16NW15NW4NW5NW5NW5NW34NW4NW6NW6NW6N9N5NW11
G21
N8N13
G17
N18
G23
NW15NW20
G26
NW25
G33
NW23
G33
2 days agoNW15
G21
NW10NW13NW6NW9NW8NW7NW4NW6NW7NW10NW8NW6NW5W4NW6NW10W10NW8NW15
G22
NW15
G19
NW15NW16NW17
G25

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
Tue -- 04:37 AM PDT     -2.19 feet Low Tide
Tue -- 06:54 AM PDT     Sunrise
Tue -- 07:30 AM PDT     Moonrise
Tue -- 10:42 AM PDT     2.20 feet High Tide
Tue -- 04:52 PM PDT     -2.21 feet Low Tide
Tue -- 07:21 PM PDT     Sunset
Tue -- 08:18 PM PDT     Moonset
Tue -- 11:02 PM PDT     2.45 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
1.60.6-0.5-1.5-2.1-2.2-1.7-0.80.41.42.12.21.80.9-0.2-1.3-2-2.2-1.9-10.11.32.12.4

Tide / Current Tables for Port San Luis, Pacific Ocean, California
   EDIT      (on/off)   Help   One Week of Data
Port San Luis
Click for Map
Tue -- 04:52 AM PDT     0.21 feet Low Tide
Tue -- 06:54 AM PDT     Sunrise
Tue -- 07:30 AM PDT     Moonrise
Tue -- 10:59 AM PDT     4.98 feet High Tide
Tue -- 05:05 PM PDT     0.19 feet Low Tide
Tue -- 07:21 PM PDT     Sunset
Tue -- 08:18 PM PDT     Moonset
Tue -- 11:18 PM PDT     5.33 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
4.63.62.41.20.40.20.61.52.73.84.754.73.82.61.40.60.20.51.32.53.84.85.3

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 (19,4,5,8)
      (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.