Wednesday, May27, 2020
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Marine Weather and Tides
La Mirada, CA

Version 3.4
NOTICE
12/16/2019 NOAA is having trouble with requests that include wind gusts. I am posting graphs without wind gusts until it gets fixed.
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.

Sunrise 5:42AMSunset 7:55PM Tuesday May 26, 2020 10:28 PM PDT (05:28 UTC) Moonrise 9:02AMMoonset 11:48PM Illumination 25% Phase: Waxing Crescent; Moon at 5 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- 803 Pm Pdt Tue May 26 2020
Tonight..W winds 10 to 15 kt in the evening, becoming variable 10 kt or less. Wind waves 2 ft or less. SW swell 2 ft at 18 seconds. Patchy dense fog in the evening, then areas of dense fog, with vsby 1 nm or less.
Wed..Winds variable 10 kt or less, becoming sw 10 to 15 kt in the afternoon. Wind waves 2 ft or less. S swell 2 ft at 17 seconds. Areas of dense fog in the morning, then patchy dense fog, with vsby 1 nm or less.
Wed night..W winds 10 to 15 kt in the evening, becoming variable 10 kt or less. Wind waves 2 ft or less. S swell 2 ft at 16 seconds. Patchy dense fog in the evening, then areas of dense fog, with vsby 1 nm or less.
Thu..Winds variable 10 kt or less, becoming sw 10 kt in the afternoon. Wind waves 2 ft or less. S swell 2 ft at 16 seconds. Areas of dense fog with vsby 1 nm or less in the morning.
Thu night..W winds 10 kt in the evening, becoming variable 10 kt or less. Wind waves 2 ft or less. S swell 2 ft at 19 seconds. Patchy fog after midnight.
Fri..Winds variable 10 kt or less, becoming sw 10 to 15 kt in the afternoon. Wind waves 2 ft or less. S swell 3 ft at 18 seconds.
Fri night..W winds 10 to 15 kt in the evening, becoming variable 10 kt or less. Wind waves 2 ft or less. S swell 3 ft at 17 seconds.
Sat..W winds 10 to 15 kt. Wind waves 2 ft or less. Mixed swell W 2 ft and S 3 ft.
Sun..W winds 10 to 15 kt. Wind waves 2 ft or less. Mixed swell W 2 ft and S 3 ft.
PZZ600 803 Pm Pdt Tue May 26 2020
Synopsis for the southern california coast and santa barbara channel including the channel islands national marine sanctuary and national park..At 00z, or 5 pm pdt, a 1029 mb high was located 500 nm northwest of seattle and a 1003 mb low was south of las vegas. Areas of dense fog with visibility of one nautical mile or less is likely south of point conception through Wednesday morning.


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 270304 AFDLOX

Area Forecast Discussion National Weather Service Los Angeles/Oxnard CA 804 PM PDT Tue May 26 2020

SYNOPSIS. 26/715 PM.

Afternoon temperatures will be well above normal over inland regions through Thursday. Most coastal locations will stay cooler due to persistent areas of overnight and morning low clouds and dense fog, some of which may linger into the afternoon. Temperatures will cool to near normal by Sunday.

SHORT TERM (TUE-FRI). 26/803 PM.

***UPDATE***

Another quiet evening across the forecast district. Latest satellite and surface observations indicate widespread stratus/fog south of Point Concpetion over the coastal waters and immediate coastal plain. Otherwise, skies are clear. Latest sounding data indicates marine inversion ranging from 600 feet north of Point Conception to around 900 feet south of Point Conception.

For the immediate short term, main forecast issue is the extent of the stratus/fog. Do not anticipate much deepening of the inversion overnight, so stratus/fog should remain confined to the immediate coastal plain (especially south of Point Conception). Given the shallowness of the inversion, dense fog will be an issue overnight. At this time, not sure how widespread any dense fog will be. So, will hold off on any advisories with the evening update, but would not be surprised if an advisory is needed later tonight and Wednesday morning.

Overall, forecast looks very good for the immediate short term. So, no significant updates are planned at this time.

***From Previous Discussion***

A solid stratus layer has formed underneath a shallow but very strong coastal inversion based from 300-500'. Low clouds and fog continue to hug much of the coastline south of Pt Conception but some additional clearing is expected through early evening. A light onshore flow in place today with the marine layer is keeping coastal areas (and up to 15 or so miles inland) relatively cool and will likely stay that way through the week. In fact, gradients trend more onshore each day through Friday so if anything clouds will be even more stubborn at the coast than today. Above the marine layer, and for most of the valleys and other inland areas temps are soaring into the 90s and should continue to do so through at least Thursday. Temps are hottest across interior SLO County and the Antelope Valley but even the western portion of the San Fernando Valley will get close to 100 each of the next couple days. This is creating a huge temperature gradient over a short distance with temps in the 60s at foggy beaches and high 90s just over the Santa Monicas into Woodland Hills. Impressive but actually not that uncommon, especially early in the warm season when stratus is a very persistent and influential feature at the coast. Dense fog over the bight region will move inland overnight and dense fog advisories may be needed in at least some of the coastal zones by later tonight or early Wednesday.

The only real adjustment to the forecast was to lower coastal temps a few degrees as it's become evident that the GFS's stronger onshore gradient forecasts from the past week or so are panning out keeping the coast cooler. We should also see the low clouds eventually pushing north along the Central Coast but that likely will have to wait until Wednesday night or Thursday.

Pretty high confidence now in a widespread cooling trend by Friday. Coastal valleys will see some cooling as early as Thursday but much more so Friday and including the interior as well as onshore gradients increase to 9-11mb and there's enough cooling aloft to help lift the inversion and bring the cooler air inland. We may need a wind advisory for the Antelope Valley towards the end of the week with those stronger gradients generating gusty southwest winds.

LONG TERM (SAT-TUE). 26/217 PM.

Models in good agreement showing the cooling trend continuing into the weekend and early next week as a pretty deep trough develops along the west coast. The initial upper low, currently located near 27n/140w, or about 800 miles southwest of LAX, may get close enough to generate some light precip across far western SLO/SB Counties early Saturday. More uncertainty on the second upper low for late Monday and Tuesday but both model ensembles have a few solutions that support some light precip even as far south as LA County. Main impact will be the cooler temps with highs dropping back to normal levels as early as Sunday.

AVIATION. 26/2332Z.

At 2230Z, the marine inversion at KLAX was based at 900 feet. The top of the inversion was 2300 feet with a temperature of 26 degrees Celsius.

Overall, moderate confidence in 00Z coastal TAFs and high confidence in valley/desert TAFs. High confidence in shallow marine inversion brining LIFR/VLIFR conditions to coastal TAFs south of Point Conception this evening and overnight, but moderate confidence in timing of flight category changes. Only moderate confidence in LIFR/VLIFR conditions for KSMX overnight.

KLAX . Overall, moderate confidence in 00Z TAF. High confidence in CIG/VSBY restrictions this evening into Wednesday morning, but only moderate confidence in timing of IFR/LIFR category changes. Timing of dissipation of CIG/VSBY restrictions could be +/- 2 hour of current 1730Z forecast. No significant easterly wind component expected.

KBUR . High confidence in 00Z TAF as CAVU conditions are anticipated through TAF period.

MARINE. 26/803 PM.

Overall moderate to high confidence in current forecast. For all the coastal waters, high confidence in winds and seas remaining below Small Craft Advisory (SCA) levels through Saturday. On Sunday, there is a 70% chance of SCA level winds across the Outer Waters and a 40% chance of SCA level winds across the western half of the Santa Barbara Channel.

Areas of dense fog with visibility one nautical mile or less at times are likely tonight through Wednesday morning for the waters south of Point Conception. A Marine Weather Statement has been reissued and will remain in effect through Wednesday morning. Mariners should be prepared to reduce speeds and use GPS navigation if available.

LOX WATCHES/WARNINGS/ADVISORIES. CA . Heat Advisory in effect until 7 PM PDT Thursday for zone 37. (See LAXNPWLOX). Excessive Heat Warning in effect until 7 PM PDT Thursday for zone 59. (See LAXNPWLOX). PZ . NONE.

.HAZARD POTENTIAL OUTLOOK (FRI-TUE).

Strong winds are expected in the Antelope Valley and surrounding foothills Friday and Saturday.



PUBLIC . MW AVIATION . RAT MARINE . Stewart/RAT SYNOPSIS . Kj

weather.gov/losangeles


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
PRJC1 15 mi58 min W 6 G 7
PSXC1 15 mi58 min NNW 1.9 G 2.9
BAXC1 16 mi112 min N 4.1 G 5.1
PFXC1 16 mi58 min N 4.1 G 4.1
46256 17 mi58 min 61°F2 ft
PFDC1 17 mi112 min Calm G 1.9
PXAC1 17 mi136 min NNW 4.1 G 5.1
AGXC1 18 mi112 min WSW 5.1 G 6
OHBC1 - 9410660 - Los Angeles, CA 19 mi58 min 62°F1013 hPa
46253 24 mi60 min 65°F2 ft
46222 - San Pedro, CA (092) 26 mi35 min 63°F2 ft
ICAC1 - 9410840 - Santa Monica Pier 28 mi58 min S 1.9 G 2.9 58°F 64°F1013 hPa
46221 - Santa Monica Bay, CA (028) 34 mi62 min 62°F3 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 mi35 minSSE 410.00 miFair67°F57°F73%1012.3 hPa
Los Alamitos Army Airfield, CA8 mi30 minSE 37.00 miA Few Clouds63°F60°F93%1012.8 hPa
Long Beach, Long Beach Airport, CA9 mi35 minNW 59.00 miFair63°F55°F78%1012.7 hPa
El Monte, CA13 mi3.7 hrsSSW 810.00 miFair81°F55°F42%1010.8 hPa
John Wayne-Orange County Airport, CA17 mi35 minS 47.00 miA Few Clouds65°F57°F78%1012.6 hPa
Los Angeles / USC Campus Downtown, CA17 mi36 minN 08.00 miFair63°F57°F81%1012.5 hPa
Hawthorne, Hawthorne Municipal Airport, CA18 mi35 minSW 59.00 miOvercast61°F55°F84%1012.7 hPa
Chino, Chino Airport, CA20 mi35 minVar 310.00 miFair71°F55°F59%1012.3 hPa
Corona Airport, CA21 mi32 minWSW 310.00 miFair70°F57°F64%1012.4 hPa
Los Angeles, Los Angeles International Airport, CA21 mi35 minW 42.00 miFog/Mist59°F57°F93%1012.6 hPa
Ontario International Airport, CA24 mi35 minW 510.00 miFair74°F53°F48%1011.2 hPa

Link to 5 minute data for KFUL

Wind History from FUL (wind in knots)
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Last 24hrS3S4CalmS3CalmSE4E4CalmCalmCalmCalmSW433SW8S6S8S10S7S5S64CalmS4
1 day agoSW4CalmS4CalmCalmCalmCalmCalmCalmSW3CalmN3--4SW73S7SW8W5SW54S8S5SE3
2 days agoCalmCalmCalmS3CalmCalmE3E3--CalmS4CalmCalmSW36SW7S8S83W103W4CalmCalm

Tide / Current Tables for Los Patos (highway bridge), California
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Los Patos (highway bridge)
Click for Map
Wed -- 12:55 AM PDT     4.35 feet High Tide
Wed -- 05:44 AM PDT     Sunrise
Wed -- 09:01 AM PDT     -0.17 feet Low Tide
Wed -- 10:04 AM PDT     Moonrise
Wed -- 04:20 PM PDT     2.82 feet High Tide
Wed -- 07:55 PM PDT     Sunset
Wed -- 07:56 PM PDT     1.82 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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4.24.34.23.732.11.20.50-0.2-00.41.11.72.32.72.82.72.421.822.32.9

Tide / Current Tables for Long Beach, Inner Harbor, California
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Long Beach
Click for Map
Wed -- 05:44 AM PDT     Sunrise
Wed -- 07:54 AM PDT     -0.28 feet Low Tide
Wed -- 10:04 AM PDT     Moonrise
Wed -- 03:24 PM PDT     3.26 feet High Tide
Wed -- 06:49 PM PDT     2.91 feet Low Tide
Wed -- 07:55 PM PDT     Sunset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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54.84.33.42.41.30.5-0.1-0.3-00.51.222.63.13.23.23.132.933.33.84.2

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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Other links: Northern Pacific     Contential US     Full GOES-East
Wind Forecast for Los Angeles/Oxnard, CA (1,6,7,8)
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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 numerous 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.