Tuesday, April7, 2020
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Marine Weather and Tides
El Segundo, 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 6:30AMSunset 7:20PM Tuesday April 7, 2020 6:41 AM PDT (13:41 UTC) Moonrise 7:10PMMoonset 6:35AM Illumination 100% Phase: Full Moon; Moon at 14 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- 212 Am Pdt Tue Apr 7 2020
Today..Winds variable 10 kt or less, becoming W 10 kt in the afternoon. Wind waves 2 ft or less. Mixed swell W 2 ft at 9 seconds and S 3 ft at 19 seconds. Slight chance of showers in the morning, then chance of showers and slight chance of tstms.
Tonight..NW winds 5 to 10 kt. Wind waves 2 ft or less. Mixed swell W 2 ft at 10 seconds and S 3 ft at 18 seconds. Chance of showers and slight chance of tstms.
Wed..W winds 5 to 10 kt, becoming sw 10 to 15 kt in the afternoon. Wind waves 2 ft or less. Mixed swell W 2 ft at 7 seconds and S 3 ft at 17 seconds. Chance of showers and slight chance of tstms.
Wed night..SW winds 10 to 15 kt, becoming 5 to 10 kt after midnight. Wind waves 2 ft or less. Mixed swell W 2 ft at 6 seconds and S 3 ft at 16 seconds. Slight chance of tstms in the evening. Chance of showers.
Thu..SW winds 5 to 10 kt. Wind waves 2 ft or less. Mixed swell W 2 ft at 7 seconds and S 3 ft at 16 seconds. Chance of showers.
Thu 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 6 seconds and S 3 ft at 15 seconds. Slight chance of showers in the evening.
Fri..NW winds 10 to 15 kt. Wind waves 2 ft or less. S swell 3 ft.
Sat..W winds 10 to 15 kt. Wind waves 2 ft or less. S swell 2 ft.
PZZ600 212 Am Pdt Tue Apr 7 2020
Synopsis for the southern california coast and santa barbara channel including the channel islands national marine sanctuary and national park..At 09z, or 2 am pdt, a 1015 mb low was about 300 nm W of point conception. This storm system will affect the coastal waters through Thursday and will bring a slight chance of Thunderstorms over all the waters this afternoon through Wednesday.


7 Day Forecast for Marine Location Near El Segundo, CA
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location: 33.91, -118.43     debug


Area Discussion for - Los Angeles/Oxnard, CA
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FXUS66 KLOX 071235 AFDLOX

Area Forecast Discussion . UPDATED National Weather Service Los Angeles/Oxnard CA 535 AM PDT Tue Apr 7 2020

updated aviation discussion

SYNOPSIS. 06/810 PM.

Scattered rain and snow showers will continue through Thursday with some snow on the major passes early Tuesday and Wednesday morning. There is a slight chance of thunderstorms tonight through Wednesday including across the coastal waters. Conditions will be dry and warmer on Friday and through the weekend.

SHORT TERM (TDY-THU). 07/134 AM.

An upper low will bring interesting and changeable weather to the area over the next three days. Currently the upper low is 180 miles WSW of Pt Conception. By noon it will be 125 miles SW of Pt Conception. It will then proceed to spot just south of San Miguel island where it will sit and spin through mid morning Wednesday. It will then head east and pick up speed ending up over central Riverside County by Wednesday evening. On Thursday it will track to the NE and into NV.

Currently the forecast area is under a large area of NVA and most of the area if shower free and under partly cloudy skies. The only exception is the far eastern portion of LA county where there are persistent bands of showers rotating into and through the area. The shower activity will remain at a minimum through late morning but will then change a large lobe of PVA moves up and into LA/VTA/SBA counties and eventually SLO county a an hour or two later. This will produce widespread shower activity which will persist overnight. The PVA and the difluent flow aloft should be enough to bring a slight chc of TSTMs as well despite the lack of really great instability. During this time most of LA/VTA/SBA counties will see a quarter to a half inch of additional rain with inch amounts possible over some mtn locations and lesser amounts over SLO county.

Snow levels will start out near 4000 feet will quickly rise to 5500 feet and then fall to 4500-5000 ft this evening. A winter weather advisory covers the mtns now since the snow shower activity is so much less than it was ydy. The advisories will turn into Winter Storm Warning over the LA and VTA mtns early this afternoon as the widespread showers develop. It is likely that the higher elevations of the San Gabriels will see about 10 inches of new snow from this afternoon through this evening. Mtn areas between 5500 feet and 7000 feet will see 5 to 9 inches of new snow with lesser amount over the SBA mtns and from 4000 ft to 5500 feet. The heavier snow Will arrive after the snow level have risen so the major mtn passes will see rainy conditions but not snowy ones.

Well below Max temperatures will continue today with most cst and vly temps topping out in the lower to mid 60s.

All mdls agree that from later Wednesday morning through Thursday the upper level flow will switch from the SW to the NE or N as the upper low tracks to the east. This will shift the focus of the precipitation from the coasts and vlys to the mtns and the interior. The csts/vlys will likely only see scattered showers and .10-.25 additional rainfall (xcp up to a half inch across the San Gabriel Vly). The interior from the Cuyama Vly the to Antelope Vly including the northern sections of the SBA/VTA/LA mtns will likely recieve a .50-1.00 inches of additional rain. A slight chc of TSTMs will persist as well again more dynamically driven than instability driven. The mtns will continue to see impressive snowfall amounts. Snow levels will remain around 5500 feet and another 5 to 10 inches of new snow is possible during this period with the greatest amounts falling above 7000 ft over the eastern San Gabriels

Max temps will fall a couple of degrees each day as the lows path brings lower hgts to the area in addition to the cloudy skies and showers. By Thursday the coasts and vlys will only see max temps a degree or two either side of 60 which is 8 to 12 degrees blo normal for most sites.

Both the NAM and the GFS agree that the upper low move to the east Thursday evening leaving only a slight chc of showers over eastern LA county interior and mtns. But the latest EC retrogrades the upper low back to the west and directly over VTA county which keeps all of the forecast activity going over night for all of the area. Given the oddness of this upper low cannot rule out that is the right soln so will keep some chc of rain in the fcst.

LONG TERM (FRI-MON). 07/312 AM.

Low confidence in the Friday forecast. The EC keeps the low over the forecast area along with a chc of showers. The GFS is more progressive keeps both the low and the showers to the east. The EC soln is a new one and is not greatly supported by the ensemble members so will, for now, keep the forecast dry. Skies will likely be partly cloudy but might turn out to be a little sunnier (with a smaller chc of a little cloudier if the EC verifies.) There will likely be several degrees of warming across the board (again less so if the EC comes true) but max temps will still remain blo normal.

Very weak ridging will nose in from the East Pac on Saturday. The airmass will still be rather cool and max temps will not rise much at all.

Dry NW slightly cyclonic flow set up over the state for Sunday and Monday. Skies will be mostly clear or partly cloudy through the period depending on how much mid level clouds are drifting overhead. There will be a little bit of warming on Sunday and then little change in temps for Monday.

AVIATION. 07/1233Z.

At 12Z, there was no marine inversion at KLAX.

High confidence in VFR conditions for all sites through at least mid morning, then low to moderate confidence. Showers are likely to spread over the region by this afternoon from east to west. The best chance for showers will be for LA County sites. Low confidence on timing of showers and potential flight category changes. MVFR conditions are most likely during periods of rain, but IFR conditions are possible in heavier showers. There will be a slight chance of thunderstorms for all sites starting this afternoon.

KLAX . Low to moderate confidence in TAF. There is a 30% chance of a shower early this morning, with increasing probability by late morning. MVFR conditions will be likely with periods of rain, with a 40% chance of IFR conditions, especially in heavier showers. There will be a slight chance of thunderstorms this afternoon and evening. High confidence in an east wind component remaining below 6 kt.

KBUR . Low to moderate confidence in TAF. There is a 30% chance of a shower early this morning, but better confidence by this afternoon. MVFR conditions will be likely with periods of rain, with a 40% chance of IFR conditions, especially in heavier showers. There will be a slight chance of thunderstorms this afternoon and evening.

MARINE. 07/1241 AM.

High confidence that winds and seas will remain below SCA level through the forecast period.

Isolated TSTMs will be possible across all of the coastal waters this afternoon and evening, then mainly confined to the southern waters on Wednesday. Any thunderstorms will be capable of producing brief heavy rain, small hail, rough seas, and possibly waterspouts.

LOX WATCHES/WARNINGS/ADVISORIES. CA . Winter Weather Advisory in effect until 5 AM PDT Thursday for zone 52. (See LAXWSWLOX). Winter Weather Advisory in effect until 2 PM PDT this afternoon for zones 53-54. (See LAXWSWLOX). Winter Storm Warning in effect from 2 PM this afternoon to 5 AM PDT Thursday for zones 53-54. (See LAXWSWLOX). PZ . NONE.

.HAZARD POTENTIAL OUTLOOK (THU-MON).

Shower activity along with a slight chance of thunderstorms will continue Thursday. Snow levels will be near 5500 ft. The weather is forecast to be non-hazardous starting Friday.



PUBLIC . Rorke AVIATION . Stewart MARINE . Stewart SYNOPSIS . Kj

weather.gov/losangeles


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
ICAC1 - 9410840 - Santa Monica Pier 8 mi53 min NNE 5.1 G 5.1 53°F 60°F1017.1 hPa
46221 - Santa Monica Bay, CA (028) 11 mi45 min 60°F4 ft
PXAC1 13 mi107 min ESE 1.9 G 1.9
BAXC1 14 mi107 min E 2.9 G 4.1
PSXC1 15 mi53 min ENE 5.1 G 6
OHBC1 - 9410660 - Los Angeles, CA 16 mi59 min 62°F1017.3 hPa
PFDC1 16 mi119 min NNE 4.1 G 4.1
PFXC1 16 mi53 min E 4.1 G 5.1
AGXC1 17 mi107 min ENE 4.1 G 4.1
PRJC1 18 mi53 min ENE 2.9 G 5.1
46256 19 mi41 min 60°F3 ft
46222 - San Pedro, CA (092) 21 mi48 min 60°F3 ft
46253 27 mi43 min 59°F3 ft
46025 - Santa Monica Basin - 33NM West Southwest of Santa Monica, CA 35 mi41 min N 3.9 G 5.8 56°F 60°F1017.1 hPa (-0.0)50°F

Wind History for Santa Monica, CA
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Los Angeles, Los Angeles International Airport, CA3 mi48 minN 310.00 miMostly Cloudy56°F46°F70%1016.6 hPa
Hawthorne, Hawthorne Municipal Airport, CA5 mi48 minN 010.00 miOvercast55°F46°F74%1016.9 hPa
Santa Monica, Santa Monica Municipal Airport, CA8 mi50 minN 010.00 miOvercast52°F46°F80%1016.6 hPa
Los Angeles / USC Campus Downtown, CA11 mi49 minN 010.00 miOvercast56°F46°F72%1016.6 hPa
Long Beach, Long Beach Airport, CA16 mi48 minN 010.00 miLight Rain54°F51°F90%1016.8 hPa
Burbank - Bob Hope Airport, CA20 mi48 minN 010.00 miOvercast49°F44°F83%1015.8 hPa
Van Nuys, Van Nuys Airport, CA21 mi50 minN 010.00 miOvercast51°F44°F77%1016.1 hPa
Los Alamitos Army Airfield, CA22 mi43 minN 010.00 miMostly Cloudy53°F51°F92%1017.2 hPa
Fullerton, Fullerton Municipal Airport, CA24 mi48 minN 010.00 miLight Rain55°F51°F87%1016.4 hPa

Link to 5 minute data for KLAX

Wind History from LAX (wind in knots)
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Tide / Current Tables for El Segundo, Santa Monica Bay, California
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El Segundo
Click for Map
Tue -- 03:35 AM PDT     -0.20 feet Low Tide
Tue -- 06:32 AM PDT     Sunrise
Tue -- 06:34 AM PDT     Moonset
Tue -- 09:43 AM PDT     5.38 feet High Tide
Tue -- 03:52 PM PDT     -0.39 feet Low Tide
Tue -- 07:10 PM PDT     Moonrise
Tue -- 07:19 PM PDT     Sunset
Tue -- 07:35 PM PDT     Full Moon
Tue -- 10:04 PM PDT     5.59 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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3.31.90.7-0.1-0.10.51.73.14.45.25.44.83.62.20.8-0.1-0.40.11.22.64.15.25.65.3

Tide / Current Tables for Santa Monica, California
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Santa Monica
Click for Map
Tue -- 03:24 AM PDT     -0.14 feet Low Tide
Tue -- 06:32 AM PDT     Sunrise
Tue -- 06:35 AM PDT     Moonset
Tue -- 09:30 AM PDT     5.60 feet High Tide
Tue -- 03:41 PM PDT     -0.41 feet Low Tide
Tue -- 07:10 PM PDT     Moonrise
Tue -- 07:19 PM PDT     Sunset
Tue -- 07:35 PM PDT     Full Moon
Tue -- 09:54 PM PDT     5.80 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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3.21.80.6-0.1-00.823.54.85.55.54.83.520.6-0.2-0.40.21.534.55.55.85.3

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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Wind Forecast for Los Angeles/Oxnard, CA (9,2,3,4)
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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.