Tuesday, September17, 2019 L-36.com


Marine Weather and Tides
Signal Hill, CA

Version 3.4
NOTICE
9/4/2019 Fixed the weather maps due to NOAA moving them.
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 6:36AMSunset 6:58PM Tuesday September 17, 2019 2:41 PM PDT (21:41 UTC) Moonrise 9:11PMMoonset 9:39AM Illumination 86% Phase: Waning Gibbous; Moon at 18 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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PZZ655 Inner Waters From Point Mugu To San Mateo Pt. Ca Including Santa Catalina And Anacapa Islands- 140 Pm Pdt Tue Sep 17 2019
Tonight..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 to 4 ft at 7 seconds and S 3 ft at 12 seconds.
Wed..Winds variable 10 kt or less, becoming sw 10 to 15 kt in the afternoon. Wind waves 2 ft or less. Mixed swell W 2 to 3 ft at 8 seconds and S 3 ft at 12 seconds.
Wed night..W winds 10 to 15 kt, becoming S 5 to 10 kt after midnight. Wind waves 2 ft or less. Mixed swell W 2 to 4 ft at 8 seconds and S 3 ft at 12 seconds.
Thu..E winds 5 to 10 kt, becoming W 10 to 15 kt in the afternoon. Wind waves 2 ft or less. Mixed swell W 2 to 3 ft at 7 seconds and S 2 ft at 12 seconds.
Thu night..W winds 10 to 15 kt in the evening, becoming variable 10 kt or less. Wind waves 2 ft or less. W swell 3 to 5 ft at 8 seconds.
Fri..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 to 3 ft at 8 seconds and S 2 ft at 11 seconds.
Fri 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 to 3 ft at 9 seconds and S 2 ft at 11 seconds.
Sat..W winds 10 to 15 kt. Wind waves 2 ft or less. Mixed swell W 2 to 3 ft and S 2 ft.
Sun..W winds 5 to 10 kt. Wind waves 2 ft or less. Mixed swell W 2 ft and S 2 ft.
PZZ600 140 Pm Pdt Tue Sep 17 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 1021 mb surface high was centered about 400 nm N of point conception, and a 1008 mb thermal low was centered across southwest arizona. Moderate northwest winds will impact the outer coastal waters, and portions of the inner waters through Thursday.


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


Area Discussion for - Los Angeles/Oxnard, CA
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Fxus66 klox 172052
afdlox
area forecast discussion
national weather service los angeles oxnard ca
152 pm pdt Tue sep 17 2019

Synopsis 17 118 pm.

Temperatures will remain relatively cool across the region
through Friday then gradual warming returns this weekend. Most
coastal and adjacent valleys will have overnight and morning low
clouds and fog at times this week and there will be locally gusty
winds west of santa barbara in the afternoon and evening hours.

Short term (tdy-fri) 17 138 pm.

A sunny day across the area with just a few small stratocumulus
around. Temperatures in most locations were within a few degrees
of yesterday. Exceptions were the central coast which was 5-10
degrees warmer due to some low level northeasterly flow and the
antelope valley which was 5-10 degrees cooler due to the cold air
from the trough that came through Monday.

We'll get another little north northeast push tonight, enough to
keep low clouds away except for coastal la ventura counties due to
a weak eddy spin up and some patchy clouds in the santa
maria lompoc areas. Expecting more northerly winds in southwestern
sb county tonight but gradient trends are weaker and winds should
be as well and mostly focused in the gaviota area again.

Trends quickly turn onshore Wednesday afternoon as a pretty cold
trough for this time of year moves into the pac nw. The trough
will continue to dig south through california Wed night into
Thursday before moving east Thursday night into Friday. Only
expecting minimal temperature changes Wednesday then slightly
cooler most areas Thursday with the trough and likely a deeper and
more widespread marine layer coverage.

Following the trough passage Thursday night we'll see another
increase in northerly winds across the western portion of the
forecast area, including likely an increase in sundowners in srn
sb county. Then as surface high pressure strengthens over the
great basin Friday morning west east gradients will weaken or
even turn slightly offshore leading to several degrees of warming
in all areas. Not expecting significant santa ana winds with this
as gradients and upper support are pretty weak but mountains and
some valley areas will likely experience some northeast winds
Friday morning.

Long term (sat-tue) 17 150 pm.

Additional warming expected Saturday as heights build over the
area and gradients weaken a little further. Again, not much wind
but some local northeast breezes expected, especially in higher
terrain.

All bets are off after Saturday as models are really bouncing
around with the position of the next trough through early next
week. Solutions range from a cutoff low over SRN ca to the low
tracking through the great basin with much higher heights locally.

Sunday does look cooler as we will be trending strongly onshore
ahead of the trough. But then after that conditions could range
anywhere from warm with offshore winds to much cooler with
possible showers. Given the flip back to the inside slider
scenario by the ECMWF today have opted to keep the forecast on the
warmer side and generally cloud-free, certainly much warmer than
the GFS and earlier ECMWF solutions. This will likely be a bumpy
ride for the next few days until models settle down.

Aviation 17 1838z.

At 1543z at klax, the marine layer was 1100 feet deep. The top of
the inversion was near 3100 feet with a temperature of 18 c.

Low confidence in the 18z TAF package, mainly coastal sections.

The current marine cloud coverage has come to an abrupt end this
morning. Mixed signals in the prospects for marine clouds for
tonight and Wednesday morning are the reason that this will not be
an easy forecast in south coastal sections. The current forecast
keeps MVFR conditions confidence is much higher in the valley and
desert TAF sites whereVFR conditions are expected for the next 24
hours. There is a 50 percent chance of marine cloud coverage on
the central coast tonight, perhaps a better chance at ksmx than
ksbp.

Klax... Low confidence in 18z taf. There is a 40% chance that MVFR
cigs will not develop after 09z. There is a 30 percent chance of
east wind component greater than 6 kt after midnight.

Kbur... Moderate confidence in 18z taf. A 30 percent of MVFR haze
or CIGS from 11z-16z.

Marine 17 125 pm.

Moderate confidence in the current forecast.

For the outer waters, small craft advisory (sca) level winds are
likely to persist through Thursday, and continuing over the two
southern zones (pzz673-676) through Friday. Lighter winds are
expected over the weekend.

Across the inner waters north of pt sal, there is a 60 percent
chance of SCA level winds this afternoon and evening. There is a
60-70% chance for (sca) for NW wind gusts Wednesday and Thursday
afternoon and evening hours. Lighter winds expected Friday.

Across the santa barbara channel, there is a 60 percent chance of
sca level winds across western portions during the late afternoon
and evening hours today through Wednesday. SCA conditions are
likely Thursday in the west channel.

Across the remainder of the southern inner waters, conditions
will remain below SCA levels through Wednesday night. 30% chance
of SCA conditions developing Thursday afternoon and evening across
the NW portion.

Beaches 17 126 pm.

A southerly swell originating from hurricane kiko will likely
bring strong rip currents to area beaches. A high rip current
risk is expected during this period. There is a 50 percent chance
that elevated surf between 3 and 5 feet will occur today and
tonight mainly along the los angeles county coast. When in doubt,
swim near a lifeguard or avoid the water.

Lox watches warnings advisories
Ca... None.

Pz... Small craft advisory in effect until 9 pm pdt this evening
for zones 645-650. (see laxmwwlox).

Small craft advisory in effect until 3 am pdt Thursday for
zones 670-673-676. (see laxmwwlox).

Hazard potential outlook (fri-tue)
No significant hazards expected.

Public... Mw
aviation... Sweet kaplan
marine... Sweet
beaches... Sweet
synopsis... Kj
weather.Gov losangeles


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
PFXC1 2 mi53 min SSW 8 G 8.9
PRJC1 2 mi53 min SW 7 G 8
PSXC1 2 mi53 min SSW 6 G 8.9
BAXC1 3 mi53 min ESE 6 G 8
46256 4 mi41 min 71°F3 ft
PFDC1 4 mi59 min SSE 6 G 8
AGXC1 5 mi53 min SSW 8 G 8.9
PXAC1 5 mi59 min S 1.9 G 7
OHBC1 - 9410660 - Los Angeles, CA 6 mi59 min 69°F1014.6 hPa
46222 - San Pedro, CA (092) 12 mi48 min 75°F3 ft
46253 13 mi41 min 74°F3 ft
ICAC1 - 9410840 - Santa Monica Pier 24 mi59 min W 8.9 G 8.9 70°F 69°F1014.6 hPa
46221 - Santa Monica Bay, CA (028) 25 mi45 min 72°F3 ft
46025 - Santa Monica Basin - 33NM West Southwest of Santa Monica, CA 46 mi41 min W 7.8 G 9.7 68°F 72°F1014.6 hPa (-0.7)67°F

Wind History for Los Angeles Pier S, CA
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Long Beach, Long Beach Airport, CA5 mi1.8 hrsS 710.00 miFair77°F59°F54%1014.4 hPa
Los Alamitos Army Airfield, CA7 mi1.7 hrsSW 810.00 miA Few Clouds77°F57°F51%1014.5 hPa
Torrance, Zamperini Field Airport, CA8 mi1.9 hrsVar 510.00 miClear77°F60°F57%1014.6 hPa
Fullerton, Fullerton Municipal Airport, CA13 mi1.8 hrsS 410.00 miFair80°F57°F47%1013.6 hPa
Hawthorne, Hawthorne Municipal Airport, CA14 mi1.8 hrsWSW 910.00 miFair79°F61°F54%1014.2 hPa
John Wayne-Orange County Airport, CA17 mi1.8 hrsSSW 810.00 miA Few Clouds78°F61°F56%1014.1 hPa
Los Angeles, Los Angeles International Airport, CA17 mi1.8 hrsWSW 1110.00 miA Few Clouds78°F61°F56%1014.3 hPa
Los Angeles / USC Campus Downtown, CA19 mi1.8 hrsN 010.00 miFair83°F61°F48%1013.4 hPa
El Monte, CA24 mi1.9 hrsN 010.00 miFair81°F55°F42%1014.2 hPa
Santa Monica, Santa Monica Municipal Airport, CA24 mi50 minSW 1010.00 miFair74°F63°F69%1013.9 hPa

Link to 5 minute data for KLGB

Wind History from LGB (wind in knots)
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Last 24hr--SE7W3W8--NW6----------CalmN4E3NW3Calm--E7E45S5S6S7S7
1 day agoS5NW8NW5W7--W5----CalmN3N3----CalmCalmSE4--NE3CalmSE6SE63S4--
2 days agoS8NW9W12W7----------------NW4CalmCalm----CalmCalmS3CalmS4SW6SW7

Tide / Current Tables for Long Beach, Outer Harbor, Pier A, California
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Long Beach
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Tue -- 05:23 AM PDT     1.27 feet Low Tide
Tue -- 06:37 AM PDT     Sunrise
Tue -- 09:39 AM PDT     Moonset
Tue -- 11:33 AM PDT     4.83 feet High Tide
Tue -- 06:00 PM PDT     1.25 feet Low Tide
Tue -- 06:56 PM PDT     Sunset
Tue -- 09:10 PM PDT     Moonrise
Tue -- 11:56 PM PDT     4.07 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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4.43.93.22.41.71.31.41.82.63.54.34.84.84.43.72.821.41.21.422.73.43.9

Tide / Current Tables for Los Angeles, California
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Los Angeles
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Tue -- 05:15 AM PDT     1.32 feet Low Tide
Tue -- 06:37 AM PDT     Sunrise
Tue -- 09:39 AM PDT     Moonset
Tue -- 11:30 AM PDT     5.03 feet High Tide
Tue -- 05:52 PM PDT     1.30 feet Low Tide
Tue -- 06:56 PM PDT     Sunset
Tue -- 09:11 PM PDT     Moonrise
Tue -- 11:53 PM PDT     4.24 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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4.643.22.41.71.31.422.83.74.5554.53.82.921.51.31.62.12.93.64.1

Weather Map
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wmap_P
GEOS 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.
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Wind Forecast for Los Angeles/Oxnard, CA (17,4,5,8)
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Ground Weather Radar Station Santa Ana Mtns, CA
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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.