Sunday, August20, 2017 L-36.com


Marine Weather and Tides
Signal Hill, 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 6:17AMSunset 7:33PM Sunday August 20, 2017 12:59 AM PDT (07:59 UTC) Moonrise 5:04AMMoonset 7:00PM Illumination 4% Phase: Waning Crescent; Moon at 28 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
PZZ655 Inner Waters From Point Mugu To San Mateo Pt. Ca Including Santa Catalina And Anacapa Islands- 819 Pm Pdt Sat Aug 19 2017
Tonight..W winds 5 to 10 kt late in the evening...becoming variable 10 kt or less. Wind waves 2 ft or less. Mixed swell W 2 ft at 10 seconds and S 3 ft at 14 seconds. Patchy fog after midnight.
Sun..Winds variable 10 kt or less...becoming sw 10 kt in the afternoon. Wind waves 2 ft or less. Mixed swell W 2 ft at 10 seconds and S 3 ft at 14 seconds. Patchy fog in the morning.
Sun night..SW winds 10 kt in the evening...becoming variable 10 kt or less. Wind waves 2 ft or less. Mixed swell W 2 ft at 10 seconds and S 3 ft at 13 seconds. Patchy fog after midnight.
Mon..Winds variable 10 kt or less...becoming W 10 to 15 kt in the afternoon. Wind waves 2 ft or less. Mixed swell W 2 ft at 10 seconds and S 2 ft at 13 seconds. Patchy fog in the morning.
Mon night..W winds 10 to 15 kt in the evening...becoming variable 10 kt or less. Wind waves 2 ft or less. Mixed swell W 2 ft at 10 seconds and S 2 ft at 13 seconds. Patchy fog after midnight.
Tue..Winds variable 10 kt or less...becoming W 10 to 15 kt in the afternoon. Wind waves 2 ft or less. Mixed swell W 2 ft and S 2 ft. Patchy fog.
Wed..W winds 10 to 15 kt. Wind waves 2 ft or less. Mixed swell W 2 ft and S 2 ft. Patchy fog.
PZZ600 819 Pm Pdt Sat Aug 19 2017
Synopsis for the southern california coast and santa barbara channel including the channel islands national marine sanctuary and national park..At 03z...or 8 pm pdt...a 1030 mb surface high was about 600 nm W of eureka and a 1008 mb low was near las vegas.

7 Day Forecast for Marine Location Near Signal Hill, CA
   Hourly   EDIT   Help
location: 33.76, -118.18     debug


Area Discussion for - Los Angeles/Oxnard, CA
      (on/off)   Help   NOTE: mouseover dotted underlined text for definition
Fxus66 klox 200638 aaa
afdlox
area forecast discussion... Updated
national weather service los angeles oxnard ca
1138 pm pdt Sat aug 19 2017

Synopsis
Near to below normal temperatures and a persistent marine layer
should be expected through the first half of next week due to a
nearly stationary low pressure center offshore. There is an
outside chance of showers and thunderstorms through early next
week for the mountains and desert.

Short term (sat-tue)
a few thunderstorms developed this afternoon across the
mountains of ventura and santa barbara counties. These
storms were slow moving and radar estimated rainfall rates
up to one inch per hour. The thunderstorm activity has now
diminished for the evening. Satellite imagery showing low
clouds returning to some coastal areas this evening. With
weak upper level low pressure system off the coast and
strengthening onshore flow, looking for the marine layer
to further deepen overnight into Sunday morning, likely
reaching 2500 to 3000 feet. As a result, looking for low
clouds and fog to spread into most valley locations
overnight, as well as the lower coastal slopes of
la ventura counties. Also, there is the potential for
some patchy drizzle late tonight into Sunday morning.

Still sufficient moisture and instability to warrant slight
chance of afternoon thunderstorms on Sunday across the
mountains of ventura and santa barbara counties. With steering
flow winds from the southeast on Sunday, any storm development
over the mountains could drift into the cuyama valley as well as
southeast portions of slo county mountains which were included in
the convective threat in evening update. Precipitable water
values will once again be around 1 inch on Sunday afternoon,
however still fairly high instability CAPE parameters which could
trigger a few thunderstorms. Upper level steering flow will once
again be fairly weak, so any storms will be slow moving and
capable of producing brief heavy rainfall. Other storm threats
on Sunday include small hail, gusty winds, and cloud to ground
lightning which could trigger fire ignitions, especially
considering the dry fuels in place.

*** from previous discussion ***
model solutions continue hint at the possibility of isolated to
scattered showers and thunderstorms each afternoon and evening
through Monday, and maybe into Tuesday. Favorable negative lifted
index and positive CAPE values exist over the mountains the next
several days. The steering flow is quite light today and any
storms that develop could be slow-moving. As a result, local
flooding could develop in or near showers and thunderstorms this
afternoon and evening.

Away from the mountains - the weak area of low pressure continues
to spin counterclockwise over the southern california bight and
models indicate it will stay nearly stationary until Wednesday.

The main impact of this will be to keep the marine layer present
and fairly thick, deepening to 2000-2500 feet by Sunday morning.

Coastal locations will see very little day-to-day weather change
while this feature persists.

Possible additional marine layer deepening could take place on
Monday, lifting the marine layer depth to closer to 2500-3500
feet Monday. With the favorable flow pattern through the mixed
layer and some weak instability aloft with the trough, the marine
layer stratus could get lifted enough to squeeze out some drizzle
and mentions of drizzle are in the forecast. With the peak of the
eclipse at around 10:15am on Monday you may need to move a bit
inland for a cloud-free view.

Conditions on Tuesday will be quite similar to those on Monday as
far as the coastal clouds and temperatures. The likelihood for
afternoon showers drops off considerably on Tuesday but remains
possible.

Long term (wed-sat)
the trough will linger over the region into Wednesday, likely
keeping an extended period of below normal temperatures, strong
onshore flow in place, and a deep marine layer over the area.

By Thursday the trough exits our forecast area and ridging begins
to develop. 500mb heights could be above 590dm by next weekend. A
slow warming trend inland, and gradual decreased extent of the
morning stratus intrusion should result.

Aviation 20 0635z.

At 06z, the marine layer depth was around 1900 feet deep at klax.

The top of the marine inversion was around 2600 feet deep with a
temperature near 20 degrees celsius. There was another inversion
up to around 6000 feet.

Predominantly MVFR conditions, with local ifr conditions north of
point conception, will spread into coastal and valley terminals
through 10z. There is a chance of ifr conditions in drizzle
between 10z and 16z, higher confidence south of point conception.

Vfr conditions should redevelop between 16z and 20z. There is a
slight chance of MVFR conditions lingering throughout Sunday
afternoon at coastal terminals.

Klax... MVFR conditions will develop through 08z. There is a 60
percent chance of ifr conditions in drizzle between 10z and 16z.

Vfr conditions should redevelop between 18z and 20z. There is a 20
percent chance of MVFR conditions lingering throughout Sunday
afternoon at coastal terminals.

Kbur... MVFR conditions will spread into kbur between 07z and 09z.

There is a 60 percent chance of ifr between 10z and 16z in
drizzle.VFR conditions should redevelop between 17z and 19z.

Marine 19 800 pm...

for the outer waters, high confidence in current forecast.

Winds and seas are expected to remain below small craft advisory
(sca) levels through Tuesday. On Wednesday, there is a 50% chance
of winds increasing to SCA levels.

For the inner waters, high confidence in current forecast. Winds
and seas are expected to remain below SCA levels through
Wednesday, though local gusts to 20 kt are possible through the
san pedro channel through late this evening.

Lox watches warnings advisories
Ca... Beach hazards statement in effect through Sunday evening for
zones 40-41. (see laxcfwlox).

Pz... None.

Hazard potential outlook (tue-sat)
isolated showers and thunderstorms for the mountains and desert
cannot be ruled out for Tuesday.

Public... Gomberg jld
aviation... Hall
marine... Mw smith
synopsis... Hall fisher
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
PRJC1 2 mi42 min WSW 7 G 7
PSXC1 2 mi42 min SE 1 G 1.9
PFXC1 2 mi42 min WSW 4.1 G 5.1 66°F
46256 4 mi38 min 69°F3 ft
OHBC1 - 9410660 - Los Angeles, CA 6 mi42 min 67°F1014.3 hPa
46222 - San Pedro, CA (092) 12 mi60 min 71°F2 ft
46253 13 mi90 min 71°F3 ft
ICAC1 - 9410840 - Santa Monica Pier 24 mi48 min SW 1 G 5.1 66°F 72°F1014.3 hPa
46221 - Santa Monica Bay, CA (028) 25 mi60 min 70°F3 ft
46025 - Santa Monica Basin - 33NM West Southwest of Santa Monica, CA 46 mi30 min W 3.9 G 5.8 72°F1013.8 hPa

Wind History for Los Angeles Pier S, CA
(wind in knots)    EDIT      (on/off)   Help
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
12
AM
Last
24hr
NE3
NE5
NE3
NE2
S1
SW5
SW5
S4
S4
S6
SW9
S9
G12
S9
G12
SW9
G12
SW9
G12
SW6
G9
NW3
G8
N5
G8
W4
NW3
E1
NW3
N1
SE2
1 day
ago
W2
SE2
E5
NE3
N4
N2
N4
NE4
--
SE7
SW9
S8
G12
S10
S9
G12
NW5
G8
NW7
NW6
S4
G7
NW6
NW5
G8
NW7
W7
W3
G7
NW2
2 days
ago
N2
N2
G5
N1
SW1
S3
S5
G8
S6
G10
SW8
G12
SW10
S8
G12
S8
G12
SW7
G11
NW6
G10
W4
G8
NW6
NW8
NW3
G7
NW2
NW2
--

Airport Reports
    EDIT      (on/off)   Help   Click EDIT to display multiple airports
AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Long Beach, Long Beach Airport, CA5 mi67 minN 010.00 miFair67°F60°F79%1014.1 hPa
Los Alamitos Army Airfield, CA7 mi2 hrsN 010.00 miFair65°F59°F81%1014.2 hPa
Fullerton, Fullerton Municipal Airport, CA13 mi67 minN 010.00 miA Few Clouds67°F61°F81%1013.8 hPa
Hawthorne, Hawthorne Municipal Airport, CA14 mi67 minWSW 510.00 miA Few Clouds67°F61°F81%1014 hPa
Los Angeles, Los Angeles International Airport, CA17 mi67 minW 610.00 miPartly Cloudy66°F61°F84%1013.7 hPa
John Wayne-Orange County Airport, CA17 mi67 minWSW 510.00 miOvercast68°F62°F81%1014.1 hPa
Los Angeles / USC Campus Downtown, CA19 mi73 minN 010.00 miMostly Cloudy68°F61°F78%1013.7 hPa
Santa Monica, Santa Monica Municipal Airport, CA24 mi69 minW 510.00 miOvercast67°F61°F81%1013.9 hPa

Wind History from LGB (wind in knots)
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
12
AM
Last 24hrN4N5CalmCalmCalmSE43NE3CalmCalmS8S6S9SW8S7S9W8NW9NW9NW8NW6NW7NW4Calm
1 day agoNW5NW4CalmNE3NE3N3N43NE4CalmS5S8S8S9NW8W9NW10NW8NW11W11NW9NW5NW5NW4
2 days agoCalmN3CalmCalmCalmCalmCalmCalm5E4S8S9S8S9S94W8NW8NW10NW9NW8NW6NW4NW5

Tide / Current Tables for Long Beach, Outer Harbor, Pier A, California
   EDIT   RT Ports Option   Weekend mode (on/off)   (on/off)   Help   One Week of Data
Long Beach
Click for Map
Sun -- 03:20 AM PDT     -0.89 feet Low Tide
Sun -- 05:04 AM PDT     Moonrise
Sun -- 06:18 AM PDT     Sunrise
Sun -- 09:37 AM PDT     4.63 feet High Tide
Sun -- 02:58 PM PDT     1.46 feet Low Tide
Sun -- 06:59 PM PDT     Moonset
Sun -- 07:32 PM PDT     Sunset
Sun -- 09:02 PM PDT     6.53 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
2.50.9-0.3-0.8-0.70.11.32.73.84.54.64.13.32.41.71.51.82.73.95.26.16.56.25.2

Tide / Current Tables for Los Angeles, California
   EDIT      (on/off)   Help   One Week of Data
Los Angeles
Click for Map
Sun -- 03:12 AM PDT     -0.93 feet Low Tide
Sun -- 05:04 AM PDT     Moonrise
Sun -- 06:18 AM PDT     Sunrise
Sun -- 09:34 AM PDT     4.83 feet High Tide
Sun -- 02:50 PM PDT     1.52 feet Low Tide
Sun -- 06:59 PM PDT     Moonset
Sun -- 07:33 PM PDT     Sunset
Sun -- 08:59 PM PDT     6.80 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
2.50.8-0.4-0.9-0.70.21.52.94.14.74.84.23.42.41.71.51.92.94.25.56.46.86.45.3

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 (3,6,7,8)
      (on/off)   Help

Ground Weather Radar Station Santa Ana Mtns, 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.