Sunday, December15, 2019
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Marine Weather and Tides
La Mirada, CA

Version 3.4
NOTICE
10/9/2019 Updated the Marine Zones.
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 6:48AMSunset 4:45PM Sunday December 15, 2019 9:52 AM PST (17:52 UTC) Moonrise 9:31PMMoonset 10:59AM Illumination 84% Phase: Waning Gibbous; Moon at 19 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- 911 Am Pst Sun Dec 15 2019
.small craft advisory in effect until 9 pm pst this evening...
Today..NW winds 10 to 20 kt with gusts to 25 kt. Combined seas 5 to 7 ft dominant period 9 seconds.
Tonight..NW winds 15 to 25 kt, becoming ne 10 to 15 kt after midnight. Combined seas 5 to 6 ft dominant period 9 seconds, subsiding to 3 to 4 ft dominant period 9 seconds after midnight.
Mon..From point mugu to santa Monica and S of palos verdes, ne winds 15 to 20 kt becoming 10 to 15 kt in the afternoon. Elsewhere, ne winds 5 to 10 kt becoming se in the afternoon. Wind waves 2 to 4 ft. W swell 2 to 4 ft at 13 seconds.
Mon night..NE winds 10 to 20 kt with gusts to 25 kt. Wind waves 2 to 4 ft. W swell 2 to 3 ft at 13 seconds.
Tue..NE winds 10 to 20 kt with gusts to 25 kt. Wind waves 2 to 4 ft. W swell 2 ft at 12 seconds.
Tue night..E winds 10 to 20 kt, becoming 5 to 10 kt after midnight. Wind waves 2 to 3 ft. W swell 2 ft at 15 seconds.
Wed..N winds 10 to 15 kt. Wind waves 2 ft or less. W swell 2 to 3 ft. Slight chance of rain.
Thu..N winds 5 to 10 kt. Wind waves 2 ft or less. W swell 2 to 3 ft.
PZZ600 911 Am Pst Sun Dec 15 2019
Synopsis for the southern california coast and santa barbara channel including the channel islands national marine sanctuary and national park..At 17z or 9 am pst, a 1003 mb low was eastern new mexico with a frontal system extending into extreme southern ca. A 1027 mb surface high was located about 600 nm west of point conception. Strong west to northwest flow across coastal waters will continue through today.


7 Day Forecast for Marine Location Near La Mirada, CA
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location: 33.9, -118     debug


Area Discussion for - Los Angeles/Oxnard, CA
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FXUS66 KLOX 151740 AFDLOX

Area Forecast Discussion . UPDATED National Weather Service Los Angeles/Oxnard CA 940 AM PST Sun Dec 15 2019

SYNOPSIS. 15/708 AM.

Moderate northerly winds will continue across portions of the region today then strong and gusty northeast winds will develop across Los Angeles and Ventura Counties Monday and Tuesday. There is a slight chance of showers Wednesday then conditions will be dry Thursday through Saturday.

SHORT TERM (TDY-TUE). 15/938 AM.

***UPDATE***

Still seeing clouds over the LA, Ventura and Santa Barbara County mountains, but nothing showing on radar or rain gauges at this time. Valley locations are running 3-5 degrees cooler and mountains 10-15 degrees cooler this morning. Impacts in the near term are still related to the offshore winds that are expected to peak on Tuesday morning.

***From Previous Discussion***

An upper trough that dropped through CA on Sat was pushing into the Great Basin this morning. Moist cyclonic NW to N flow was causing clouds to pile up against the northern slopes of the mountains from southeastern SLO County through northern L.A. County, and there were scattered showers as well. Snow levels have dropped to around 4500 feet or so, and may drop a bit more by daybreak. Local additional snow accumulations of an inch or two are possible, and snow could affect portions of Interstate 5 near the Grapevine. Will leave the Winter Weather Advisory in place for the mtns of VTU and L.A. Counties excluding the Santa Monica Range in place this morning.

Clouds and showers should decrease by late morning or early afternoon. Otherwise, expect mostly sunny skies today, though there may be enough moisture for some stratocu to develop this afternoon. It will be a chilly day across the region, with temps down a few degrees from those observed on Sat. The most cooling is expected in the mountains and in the Antelope Valley.

Gusty advisory level northwest to north winds were affecting the mountains and adjacent south coast of Santa Barbara County, and the mountains of L.A. and VTU Counties. Winds are expected to continue through this evening. Wind Advisories are in effect for southern SBA County, but for the mtns of L.A./VTU Counties, the winds are handled by the Winter Weather Advisory. Once that expires at noon, it will have to be replaced by a Wind Advisory. Northerly winds are also expected to increase to advisory levels across the Santa Clarita and San Fernando Valleys, the Santa Monica Mountains, and much of the L.A. County coast this morning, with winds continuing through this evening. Northwest to north winds will diminish some tonight, then shift to northeast by Monday morning.

An upper ridge will amplify off the West Coast tonight, then move into the forecast area on Mon. It will move to the east of the region on Tue as a large upper low moves into the eastern Pacific.

All models show good offshore gradients between KLAX and KDAG Mon morning, generally between -4 and -6 mb, with gradients actually increasing a bit during the day. All models also show the strongest offshore gradients Tue morning, though do show the gradients weakening (but remaining moderately offshore).

At this point, it looks as though there will be advisory level northeast winds at times from Mon morning through early Tue afternoon across the mountains of L.A./VTU Counties, the Santa Clarita/San Fernando Valleys, the VTU County Valleys and Coast, the Santa Monica Mtns, and the L.A. County coast from Malibu to the Hollywood Hills. With the trend of the models toward a stronger and stronger wind event, there is a chance that winds could reach low end High Wind Warning levels in some favored areas despite the lack of significant upper support.

Skies should be mostly clear Mon and Mon night, then high clouds will increase on Tue, especially across northern and western sections where it will likely become rather cloudy. There will be some warming on Mon west of the mountains, then expect little change or slight cooling on Tue.

LONG TERM (WED-SAT). 15/518 AM.

The EC and GFS continue to show some disagreement with the track and speed of the upper low moving into the West Coast Tue night and Wed, but are in somewhat better agreement than in previous days. The EC shows the upper low opening into a negatively tilted trough as it swings into the forecast area late Tue night early Wed. The GFS keeps the upper low intact and tracks it into northern CA Wed morning, but its southern end becomes elongated and takes on a negative tilt, similar to that of the EC.

Despite the favorable upper pattern, both models show a band of rain moving into SLO and SBA Counties Tue night, falling apart quickly as it moves south of Pt Conception on Wed. This is likely due to the frontal band becoming increasingly separated from the best mid level dynamics of the upper system, and encountering decent lingering offshore low level flow across L.A. and VTU Counties. Will keep chance pops for Tue night and Wed across northern areas, with pops expanding across the entire area on Wed, though with somewhat lower values.

Weak upper level ridging will move into the region Thu and linger into Fri. It will move east of the area Sat as a large upper level trough approaches the West Coast. Dry weather is expected Thu thru Sat, though high clouds will likely begin to increase Fri and Sat. Max temps should be several degrees below normal on Wed, then warm to generally near normal to slightly below normal by Fri, with little change on Sat.

AVIATION. 15/1303Z.

At 0945Z, Around KLAX, there was no marine layer inversion.

S of Point Conception . VFR conds expected through the period. There is a 20% for MVFR Cigs through 18z this morning. There is a 40% chance that northerly winds through this evening might be 10 mph too strong with gusts through this evening. Good confidence with NE wind shift by late this evening into early Monday morning. Possible moderate UDDF and LLWS at Los Angeles, Ventura County Valley and Coastal TAF sites.

N of Point Conception . Moderate to high confidence with VFR TAFs through the period. 20% chance for MVFR CIGS at KPRB through 18z.

KLAX . High confidence with sky, but low to moderate with wind conditions for 12Z TAF. VFR Conds through 18z Mon. There is a chance of moderate wind shear and turbulence below 050 through early this evening. North winds around 10 knots are likely early, strengthening this morning. There is a 50% chance for northerly winds to gust between 20 and 30 knots this morning.

KBUR . Moderate to high confidence with 12z TAF in respect to visibilities but lower with wind conditions. Overall VFR conds expected. There is a 20% chance for MVFR CIGs from 18z-22z today. Some moderate UDDF and LLWS through at least 06z this eve.

MARINE. 15/406 AM.

Moderate to high confidence in the current forecast for the outer waters and northern inner waters.

Outer Waters . The GALE WARNING has been replaced with a Small Craft Advisory (SCA) this morning for the two southern zones PZZ673-676 continuing through late tonight into early Monday morning. A SCA will continue for the northern zone with a combination of gusty NW winds and hazardous seas through late tonight as well. On Tuesday and Tuesday night, there is a good chance of SCA level east to southeast winds across the outer waters.

Inner Waters North of Pt Sal . Good confidence with SCA conds due to winds and hazardous seas will continue through late tonight. There is a 30% chance for SCA level east to southeast winds. On Tuesday and Tuesday night, There is a 50% chance for SCA level east to southeast winds.

Inner Waters south of Point Conception . Moderate to high confidence in the current forecast. GALE WARNING has been replaced with a SCA for both the inner water zones PZZ650-655 through this evening. Then, from late Sun night through Tue, there is a 50% chance for SCA level NE winds especially across eastern sections between Ventura and Malibu to the Channel Islands as well as the San Pedro Channel to Avalon Harbor.

A large and long period west to northwest swell will affect the coastal waters through at least late tonight, resulting in hazardous sea conditions and large breaking waves near shore, especially with a large short period wind swell on top of that. Breaking waves at the Morro Bay and Ventura Harbor entrances will be possible.

BEACHES. 15/407 AM.

A large long-period west to northwest swell across the coastal waters of southwest California will slowly subside over the remainder of the weekend. A HIGH SURF ADVISORY remains in effect for the Central Coast through Monday morning and through noon today for the beaches south of Point Conception. The highest surf will occur across exposed west facing beaches. Strong rip currents and dangerous breaking waves are expected.

With high tides between 6 and 6.5 feet this morning, minor coastal flooding is possible during the late morning high tide. Any coastal flooding impacts should be confined to the beaches, with flooding possible in the most vulnerable parking lots, bike paths, and walkways.

LOX WATCHES/WARNINGS/ADVISORIES. CA . High Surf Advisory in effect until noon PST Monday for zones 34-35. (See LAXCFWLOX). High Surf Advisory in effect until noon PST today for zones 39>41-87. (See LAXCFWLOX). Wind Advisory in effect until 6 PM PST this evening for zones 39-52. (See LAXNPWLOX). Wind Advisory in effect until 9 PM PST this evening for zones 41-46-88-547. (See LAXNPWLOX). Winter Weather Advisory in effect until noon PST today for zones 53-54. (See LAXWSWLOX). PZ . Small Craft Advisory in effect until 3 AM PST Monday for zones 645-670-673-676. (See LAXMWWLOX). Small Craft Advisory in effect until 9 PM PST this evening for zones 650-655. (See LAXMWWLOX).

.HAZARD POTENTIAL OUTLOOK (TUE-SAT).

Gusty northeast winds possible across parts of LA/Ventura Counties Tuesday.



PUBLIC . DB/jld AVIATION . Kaplan MARINE . Kaplan BEACHES . Kaplan/Hall SYNOPSIS . Kj

weather.gov/losangeles


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
PRJC1 15 mi52 min NW 11 G 14
PSXC1 15 mi52 min NNW 15 G 22
BAXC1 16 mi52 min N 13 G 16
PFXC1 16 mi52 min NW 18 G 21
46256 17 mi52 min 61°F4 ft
PFDC1 17 mi52 min WNW 15 G 18
PXAC1 17 mi52 min NW 8 G 12
AGXC1 18 mi52 min NW 15 G 20
OHBC1 - 9410660 - Los Angeles, CA 19 mi58 min 63°F1018.1 hPa
46253 24 mi52 min 63°F6 ft
46222 - San Pedro, CA (092) 26 mi29 min 62°F7 ft
ICAC1 - 9410840 - Santa Monica Pier 28 mi58 min NNW 20 G 27 57°F 61°F1017.6 hPa
46221 - Santa Monica Bay, CA (028) 34 mi26 min 62°F6 ft

Wind History for Los Angeles Pier J, CA
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Fullerton, Fullerton Municipal Airport, CA2 mi60 minWSW 510.00 miA Few Clouds56°F42°F60%1016.7 hPa
Los Alamitos Army Airfield, CA8 mi1.9 hrsN 510.00 miA Few Clouds51°F38°F63%1016.9 hPa
Long Beach, Long Beach Airport, CA9 mi60 minNW 1210.00 miFair57°F32°F39%1017 hPa
El Monte, CA13 mi68 minN 010.00 miFair54°F44°F72%1017.3 hPa
John Wayne-Orange County Airport, CA17 mi60 minN 010.00 miFair57°F36°F45%1017.1 hPa
Los Angeles / USC Campus Downtown, CA17 mi61 minVar 3 G 1610.00 miFair58°F34°F41%1017.2 hPa
Hawthorne, Hawthorne Municipal Airport, CA18 mi60 minNW 7 G 1510.00 miFair58°F32°F38%1017.8 hPa
Brackett Field Airport, CA19 mi66 minN 010.00 miMostly Cloudy50°F42°F76%1016.9 hPa
Torrance, Zamperini Field Airport, CA19 mi66 minNW 10 G 1710.00 miClear57°F32°F39%1017.6 hPa
Chino, Chino Airport, CA20 mi60 minN 04.00 miFog/Mist51°F48°F89%1017 hPa
Corona Airport, CA21 mi57 minSSE 310.00 miFair54°F51°F90%1016.5 hPa
Los Angeles, Los Angeles International Airport, CA21 mi60 minNNW 9 G 3010.00 miA Few Clouds59°F32°F36%1017.5 hPa
Ontario International Airport, CA24 mi60 minSSW 37.00 miPartly Cloudy53°F48°F83%1016.5 hPa

Link to 5 minute data for KFUL

Wind History from FUL (wind in knots)
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Last 24hrE4CalmCalm4S4S7SW85SW9Calm3E4CalmE4CalmCalmCalmCalmCalmCalmCalmCalmCalmW5
1 day agoCalm34W3CalmS5S5S64CalmCalmE4SE4CalmSE4CalmSE3E3E4E4NE3CalmCalmE4
2 days agoE3SE3S4--SW5S7S43CalmCalmCalmCalmE4CalmCalmCalmCalmCalmCalmE3E5CalmCalmCalm

Tide / Current Tables for Los Patos (highway bridge), California
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Los Patos (highway bridge)
Click for Map
Sun -- 12:54 AM PST     3.13 feet High Tide
Sun -- 05:22 AM PST     1.56 feet Low Tide
Sun -- 06:49 AM PST     Sunrise
Sun -- 09:58 AM PST     Moonset
Sun -- 11:25 AM PST     4.95 feet High Tide
Sun -- 04:45 PM PST     Sunset
Sun -- 07:09 PM PST     -0.37 feet Low Tide
Sun -- 08:31 PM PST     Moonrise
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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33.12.92.41.91.61.62.12.83.74.44.94.94.43.72.61.50.6-0.1-0.4-0.20.31.11.9

Tide / Current Tables for Long Beach, Inner Harbor, California
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Long Beach
Click for Map
Sun -- 04:15 AM PST     2.49 feet Low Tide
Sun -- 06:50 AM PST     Sunrise
Sun -- 09:59 AM PST     Moonset
Sun -- 10:29 AM PST     5.72 feet High Tide
Sun -- 04:45 PM PST     Sunset
Sun -- 06:02 PM PST     -0.59 feet Low Tide
Sun -- 08:31 PM PST     Moonrise
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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3.63.53.12.72.52.633.74.55.25.75.75.14.22.91.60.5-0.3-0.6-0.40.31.22.23

Weather Map
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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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Other links: Northern Pacific     Contential US     Full GOES-East
Wind Forecast for Los Angeles/Oxnard, CA (12,3,4,5)
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Ground Weather Radar Station Santa Ana Mtns, CA
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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.