Wednesday, August21, 2019 L-36.com


Marine Weather and Tides
Pismo Beach, CA

Version 3.4
NOTICE
7/25/2019 New feature in the Airports section gives a link to 5 minute updates for data reports.
6/2/2019. Many thanks to a user for reporting an error on one of the Edit pages. The switch to PHP 7.2 caused many pages that previously worked to quit working. I fixed many but I still depend on users to report ones I missed. Please report errors HERE or send an email to me at L-36.com. Allen

Sunrise 6:25AMSunset 7:45PM Wednesday August 21, 2019 5:12 PM PDT (00:12 UTC) Moonrise 10:18PMMoonset 10:56AM Illumination 62% Phase: Waning Gibbous; Moon at 21 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- 208 Pm Pdt Wed Aug 21 2019
.small craft advisory in effect until 9 pm pdt this evening...
Tonight..NW winds 15 to 25 kt in the evening, becoming 5 to 15 kt. Combined seas 6 to 8 ft dominant period 8 seconds. Patchy dense fog with visibility 1 nm or less.
Thu..Winds variable 10 kt or less, becoming nw 10 to 20 kt in the afternoon. Wind waves 1 to 3 ft. NW swell 5 to 6 ft at 8 seconds. Patchy dense fog with visibility 1 nm or less in the morning.
Thu night..NW winds 10 to 20 kt in the evening, becoming W 5 to 10 kt. Wind waves 1 to 3 ft. NW swell 6 to 7 ft at 9 seconds.
Fri..SE winds 5 to 10 kt, becoming W in the afternoon. Wind waves 2 ft or less. NW swell 4 to 6 ft at 9 seconds.
Fri night..W winds 10 kt in the evening, becoming variable 10 kt or less. Wind waves 2 ft or less. NW swell 4 to 5 ft at 10 seconds.
Sat..Winds variable 10 kt or less, becoming sw 10 kt in the afternoon. Wind waves 2 ft or less. NW swell 3 to 4 ft at 10 seconds.
Sat night..SW winds 10 kt in the evening, becoming variable 10 kt or less. Wind waves 2 ft or less. NW swell 3 to 4 ft at 10 seconds.
Sun..NW winds 10 to 15 kt. Wind waves 2 ft or less. Mixed swell nw 3 to 4 ft and S 3 ft.
Mon..NW winds 10 to 15 kt. Wind waves 2 ft or less. NW swell 3 to 4 ft.
PZZ600 208 Pm Pdt Wed Aug 21 2019
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 pdt, a 1022 mb surface high was located 800 nm west of point conception, while a 1006 mb thermal low was over southwest arizona. The high will push closer to the coast tonight, then retreat back offshore Thursday through the weekend. Gale force winds and dangerous seas are likely from the central coast to san nicolas island tonight, with choppy seas elsewhere.


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 212357 aaa
afdlox
area forecast discussion... Updated
national weather service los angeles oxnard ca
457 pm pdt Wed aug 21 2019
updated aviation discussion

Synopsis 21 144 pm.

A trough of low pressure will bring a cooling trend on Thursday
through the end of the week. There will be areas of night through
morning low clouds and fog for most coastal areas. High pressure
will build back in later this weekend with some warming, mainly
inland.

Short term (tdy-sat) 21 213 pm.

Temperatures warmed across the board today anywhere from a couple
degrees over yesterday to as many as 25 degrees at san luis
harbor avila beach where it has reached 91 so far this afternoon!
offshore trends and building high pressure aloft are the primary
factors generating these warm hot temperatures. Northerly
sundowner winds expected to return to SRN sb county later this
afternoon and evening with gusts to around 50 mph in the strongest
areas, mainly from refugio canyon west. Hi res models still
showing some winds reaching the eastern portion of the santa ynez
range but at much lower speeds. Warm temps and lower humidities
still expected which will create elevated fire concerns there.

Today should be the warmest day in most areas as onshore trends
and lowering heights cause temps to fall slightly Thursday. Still
near to above normal temps in most areas with just some patchy
marine layer clouds, mainly central coast and la county.

The cooling trend will continue into Friday as an eddy develops
near catalina and marine layer clouds become more widespread along
the coast. Some of those will push into the coastal valleys early
Friday morning.

Temperature trends will reverse Saturday as onshore flow weakens
and heights start to rebuild. Expecting most areas to warm up 2-5
degrees from Friday's levels, though more so across inland slo
county.

Long term (sun-wed) 21 227 pm.

A modest warming trend that will begin Saturday will continue into
early next week but moderate onshore gradients and little if any
northerly flow at lower levels will keep temps from going up too
much, mainly 90s in the valleys and 70s 80s closer to the coast.

Seasonably warm with highs generally 2-5 degrees above normal.

Will be closely monitoring the track and intensity of what is now
ts ivo (pronounced "eye-vo") off the coast of mexico. It's
expected to make a turn to the northwest and be near 30n 125w by
Monday afternoon. This would put it about 500nm southwest of la,
but likely not even a tropical depression by that time as it
drifts over cooler waters. Main impacts will likely be increasing
southerly swells and surf at south facing beaches. Models not
showing much in the way of moisture at lower levels but we should
at least see some mid and high clouds from it as early as Sunday
night.

Aviation 21 2355z.

At 2330z, the marine layer was 1000 feet deep at klax. The top of
the inversion was around 2800 feet with a temp of 28c.

There is moderate confidence in the 00z tafs at ksmx, ksmo, klax
and klgb due to uncertainties with the timing and extent of low
clouds and fog with lifr ifr conditions from later this evening to
later tonight and persisting into Thu morning. There is also a
30% chance the low clouds may not affect ksmo at all during the
period. Otherwise, the low clouds should move into ksmx around
05z and for the rest of the airfields between 10z and 13z. The
low clouds should clear toVFR by 17z. The timing of the onset and
dissipation of the low clouds may be off + - an hour or two.

Elsewhere, there is generally hi confidence in the 00z tafs with
vfr conditions thru Thu afternoon. However, there is a 20%-30%
chance low clouds and lifr CIGS could affect ksbp late tonight and
early thu.

Klax... There is moderate confidence in the 00z TAF due to
uncertainties with the timing and extent of low clouds and fog
with ifr conditions from late tonight into Thu morning. Low
clouds should move in around 12z and persist until around 17z thu,
withVFR conditions the rest of the day into early evening before
ifr CIGS move back in around 04z Thu evening. The timing of the
onset and dissipation of any low clouds may be off + - an hour or
two.

Kbur... Hi confidence in the 00z TAF withVFR conditions expected
thru Thu afternoon.

Marine 21 202 pm.

High confidence in gale force winds and dangerous short period
dominant sea conditions through tonight over the outer waters
from the central coast to san nicolas island. Peak winds between
35 and 40 kt are likely this evening. These winds will lower to
small craft advisory (sca) for Thursday and Thursday night.

Moderate confidence for relatively light winds well below sca
Friday through at least the weekend.

High confidence in small craft advisory (sca) winds nearshore
along the central coast, and the western santa barbara channel
through much of tonight. All of these winds will generate choppy
or steep seas over all coastal waters this afternoon through
Thursday morning.

Morning southeast winds will be on the rise as well. The waters
from the east santa barbara channel and southward will see 5 to 10
kt Thursday morning. Local gusts to 15 kt through the san pedro
channel are possible. These winds will expand Friday morning to
all nearshore waters (including the central coast). Local gusts to
15 to 20 kt are possible around the channel islands, and through
the san pedro channel.

There is a possibility for a large southeast swell to impact the
waters Sunday through Tuesday from tropical storm ivo. A swell
from this direction would cause strong surges around harbors,
including avalon and long beach, as well as large breaking waves
near the coast. Stay tuned as details develop.

Beaches 21 228 pm.

Tropical storm ivo, currently about 600 miles south of the
southern tip of baja california, will generate a southeasterly
swell reaching california Sunday through Tuesday. The peak should
occur Sunday afternoon through Monday morning with a period
around 14 seconds. While the peak swell heights will most likely
fall between 3 and 5 feet, there is a 20 percent chance for a
range of 5 and 7 feet.

Dangerous rip currents and large breaking waves on rock jetties
are certain. Surf heights should reach 4 to 6 feet over south
facing beaches, but could exceed the 7 foot high surf advisory
levels for los angeles county during the peak.

There is a small risk for impactful coastal flooding. The highest
tides will be in the early evening, and should reach a modest 5.5
to 6.0 feet. If the peak swell ends up 3 to 5 feet, flooding
impacts would be minor and mainly in the form of beach erosion. If
the swell height ends up closer to 7 feet, more impactful flooding
would be possible for the vulnerable areas like pebbly beach in
avalon and the long beach peninsula if unprotected.

Lox watches warnings advisories
Ca... Wind advisory in effect until 3 am pdt Thursday for zones
39-52. (see laxnpwlox).

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

Small craft advisory in effect until 3 am pdt Thursday for
zone 650. (see laxmwwlox).

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

Hazard potential outlook (sat-wed)
Elevated surf and strong rip currents are possible at area beaches
early next week.

Public... Mw
aviation... Sirard
marine... Kittell
beaches... Kittell
synopsis... B
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 mi54 min W 18 G 22 84°F 60°F1008.9 hPa
CPXC1 10 mi28 min W 13 G 15 87°F 990.3 hPa52°F
46011 - SANTA MARIA - 21 NM Northwest of Point Arguello, CA 13 mi82 min 61°F 59°F7 ft1010.2 hPa (-2.0)
46215 - Diablo Canyon, CA (076) 13 mi42 min 60°F4 ft
PTGC1 - Point Arguello, CA 32 mi72 min N 23 G 26 61°F 1009.9 hPa (-1.7)
HRVC1 39 mi54 min 61°F 1010.8 hPa
46218 - Harvest, CA (071) 40 mi42 min 60°F7 ft
46259 42 mi42 min 62°F7 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
W12
G15
W8
G11
W7
W1
--
NW1
--
SW1
W1
--
--
N2
--
NW2
NE2
--
S1
E1
NE2
S2
E2
G5
W15
G19
W24
G29
W23
1 day
ago
W20
W16
G20
W11
G16
W8
G12
NW1
NW1
W2
W2
SW2
W10
G13
N3
SW6
G10
N1
N4
W2
NE1
S3
G6
W9
G14
W14
G17
W12
G15
W16
W17
G22
W19
G23
W15
G19
2 days
ago
W11
G17
W17
W16
W8
--
NW1
NW1
--
NW1
--
N1
SE1
N2
N5
SE2
--
SE2
S4
S4
W8
G12
W17
G21
W16
G21
W18
G23
W23

Airport Reports
    EDIT      (on/off)   Help   Click EDIT to display multiple airports. Follow links for more data.
AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
San Luis Obispo, San Luis Obispo County-Mc Chesney Field, CA17 mi76 minNW 1810.00 miFair and Breezy77°F54°F45%1009.6 hPa
Santa Maria Public Airport/Capt G Allan Hancock Field, CA20 mi21 minWNW 158.00 miFair72°F55°F55%1009.6 hPa
Lompoc, Vandenberg Air Force Base, CA23 mi77 minNNW 1410.00 miA Few Clouds67°F57°F72%1011.2 hPa

Link to 5 minute data for KSBP

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 24hrNW14NW13NW11NW10----------CalmCalmCalm----W7W8NW14NW15NW17
G24
NW16NW20NW21NW19
G27
NW18
1 day agoNW14NW14NW13------NW9NW8NW4W4--NW7NW5NW3NW3NW5CalmNW33NW4W7--NW19NW13
2 days agoNW9NW12NW13--------NW9----W5CalmSW3--S3--CalmCalm44--W8NW10NW15

Tide / Current Tables for Avila, California
   EDIT   Weekend mode (on/off)   (on/off)   Help   One Week of Data
Avila
Click for Map
Wed -- 01:43 AM PDT     0.70 feet High Tide
Wed -- 06:27 AM PDT     Sunrise
Wed -- 07:49 AM PDT     -1.18 feet Low Tide
Wed -- 11:56 AM PDT     Moonset
Wed -- 02:35 PM PDT     1.54 feet High Tide
Wed -- 07:44 PM PDT     Sunset
Wed -- 09:36 PM PDT     -1.05 feet Low Tide
Wed -- 11:18 PM PDT     Moonrise
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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
5
pm
6
pm
7
pm
8
pm
9
pm
10
pm
11
pm
0.30.60.70.50.2-0.3-0.8-1.1-1.2-1-0.6-00.61.21.51.51.30.80.2-0.3-0.8-1-1-0.8

Tide / Current Tables for Port San Luis Wharf, California
   EDIT      (on/off)   Help   One Week of Data
Port San Luis Wharf
Click for Map
Wed -- 01:38 AM PDT     3.88 feet High Tide
Wed -- 06:27 AM PDT     Sunrise
Wed -- 07:50 AM PDT     1.68 feet Low Tide
Wed -- 11:56 AM PDT     Moonset
Wed -- 02:30 PM PDT     4.47 feet High Tide
Wed -- 07:44 PM PDT     Sunset
Wed -- 09:12 PM PDT     2.06 feet Low Tide
Wed -- 11:18 PM PDT     Moonrise
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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
5
pm
6
pm
7
pm
8
pm
9
pm
10
pm
11
pm
3.53.83.93.63.22.62.11.81.71.92.333.64.14.44.44.23.73.12.62.22.12.12.4

Weather Map and Satellite Images
       (on/off)   HelpWeather Map
wmap_P
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 (20,4,5,8)
      (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.