Sunday, September27, 2020
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Marine Weather and Tides
El Segundo, CA

Version 3.4
NOTICE
8/26/2020 The 7 day forecast is taking about 5 seconds to load but it will eventually load. NOAA is still working on it.
8/18/2020 NOAA continues to have trouble. Wind guest will occasionally be left off graphs. I am working with NOAA to resolve the issue.
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 6:44AMSunset 6:44PM Sunday September 27, 2020 9:43 AM PDT (16:43 UTC) Moonrise 5:00PMMoonset 2:42AM Illumination 79% Phase: Waxing Gibbous; Moon at 10 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- 914 Am Pdt Sun Sep 27 2020
Today..Winds variable 10 kt or less, becoming S 10 kt in the afternoon. Wind waves 2 ft or less. W swell 2 to 3 ft at 10 seconds. Patchy fog in the morning.
Tonight..W winds 10 kt in the evening, becoming variable 10 kt or less. Wind waves 2 ft or less. W swell 2 to 3 ft at 10 seconds. Patchy fog after midnight.
Mon..Winds variable 10 kt or less, becoming sw 10 kt in the afternoon. Wind waves 2 ft or less. W swell 2 ft at 10 seconds. Patchy fog in the morning.
Mon night..W winds 10 kt in the evening, becoming variable 10 kt or less. Wind waves 2 ft or less. W swell 2 to 3 ft at 10 seconds.
Tue..NW winds 5 to 10 kt, becoming W 10 to 15 kt in the afternoon. Wind waves 2 ft or less. W swell 2 ft at 11 seconds. S swell 2 ft.
Tue night..NW winds 10 to 15 kt, becoming 5 to 10 kt after midnight. Wind waves 2 ft or less. Mixed swell W 2 to 3 ft at 11 seconds and S 2 ft at 18 seconds.
Wed..NW winds 10 to 15 kt. Wind waves 2 ft or less. Mixed swell W 2 to 4 ft and S 2 ft.
Thu..W winds 10 to 15 kt. Wind waves 2 ft or less. Mixed swell W 2 to 4 ft and S 2 ft.
PZZ600 914 Am Pdt Sun Sep 27 2020
Synopsis for the southern california coast and santa barbara channel including the channel islands national marine sanctuary and national park..At 15z, or 8 am pdt, a 1026 mb high pressure center was located about 900 nm west of point conception, and a 1006 mb thermal low was centered over southern nevada. Patchy fog will continue through Monday. The lowest visibility and most widely spread conditions will occur in the overnight and morning hours.


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 271552 AFDLOX

Area Forecast Discussion National Weather Service Los Angeles/Oxnard CA 852 AM PDT Sun Sep 27 2020

SYNOPSIS. 27/851 AM.

High pressure will rebuild over the region this weekend into next week, resulting in a warming trend that will begin today across inland areas. More significant warming is expected Monday through Wednesday with triple digit heat likely for valleys by Tuesday. Coastal areas will still have low clouds and fog Monday but will see a warming trend through mid week. Very gradual cooling is expected late in the week. Light to moderate offshore winds are expected Monday across the mountains and valleys.

SHORT TERM (TDY-TUE). 27/838 AM.

We are starting to move into this offshore pattern now that the trough to the north has moved inland. Winds at Sandberg and Warm Springs (near I5 north of the Santa Clarita Valley) have shifted to northeast with gusts between 25 and 35 mph and we're also seeing some breezy northeast winds at higher elevations of SLO/SB Counties. So things are moving along as expected so far though we still have a 2000' marine layer to deal with and all indications are that a solid marine layer will still be with us at least into Monday morning, though likely somewhat shallower. The 12z NAM continued it's recent trend weakening the expected offshore gradients both tomorrow and Tuesday, leading to decreasing confidence in peak wind speeds and temperatures. In addition, the general lack of cold air advection with this event will definitely minimize chances that the offshore push will be strong enough to punch through the marine layer Monday so current thinking is that winds tomorrow will not reach down to lower elevations or will be much weaker than models are suggesting. Winds probably will still reach low end advisory levels in a relatively small portion of the LA Mtns, mainly in and around the Santa Clarita Valley but lighter winds expected elsewhere.

Temps Monday will be tricky with the uncertainty on wind strength and the persistent marine layer. May ultimately have to trim temps a few degrees especially closer to the coast. Probably will not need heat advisories Monday but better chance Tuesday, though here still there are definitely concerns about the marine layer influence due to the continued downward trend in offshore gradients.

***From Previous Discussion***

High temperatures on Monday are expected to heat up significantly due to the combination of strong high pressure aloft and weak- moderate offshore flow in place. Most valleys will reach the upper 90s to around 101 degrees. Even a few SLO interior valley locations could reach triple digits while most other valleys will be in the lower to mid 90s. Coastal areas will also be very warm on Monday with highs in the 80s to near 90 across inland coastal areas. Low clouds for Monday night should remain off the coast due to the persistent weak offshore flow in place. Some additional local offshore winds will continue Tue morning across the usual wind prone passes and canyons around 15 to 25 mph. There will be an additional 4-8 degrees of warming across L.A. and Ventura Counties with a persistent expanding ridge overhead and continued weak offshore flow. expect widespread triple digit heat across valleys, with the hottest temperatures reaching 105 degrees across the San Fernando Valley. Inland coastal areas around Downtown L.A. and Ventura County Coast will be in the lower to mid 90s. Overnight temperatures will remain in the 70s for some elevated valleys, lower mountain elevations, otherwise lows across coastal areas will be in the mid to upper 60s.

Heat Advisories are likely to be issued starting as early as Monday, with the hottest days Tue/Wed for some valley,coastal and possibly some mountain locations including the Santa Monica Mtns.

LONG TERM (WED-SAT). 27/542 AM.

The hot and dry pattern will continue through at least Thursday as the amplified upper ridge will persist across the western states reaching into Canada. Weak offshore flow will continue across inland areas through most of the extended period (Wed-Sat). Wednesday will be the hottest day of the week with valleys reaching 95-105 degrees. Expect 80s/90s for the coast. There will be slight cooling on Thursday, and better cooling, especially across coastal areas Fri/Sat. However, high temps will remain above normal through the weekend.

AVIATION. 27/1325Z.

At 12Z at KLAX, the marine layer was around 1800 ft deep. The top of the inversion was around 3300 ft with a temp of 23 degrees C.

Low clouds were widespread in all coastal and valley areas south of Pt Conception except for the Santa Clarita Valley. N of Pt Conception, skies were clear, but some cigs will likely sneak into portions of the Central Coast for a few hours this morning. Conds were mostly IFR to LIFR in the valley and low MVFR to locally high IFR across coastal sections. Expect skies to clear by mid to possibly late morning in the valleys, and by noon across the coastal plain. Clouds may linger at the beaches into the afternoon.

Expect clouds to be widespread in all coastal areas tonight, likely returning this evening to many areas, especially south of Pt Conception. Conds should be low MVFR to high IFR, except LIFR to VLIFR on the Central Coast. Developing offshore flow is expected to keep clouds out of the valleys, but confidence in that is low.

KLAX . Moderate confidence in TAF. There is a 30% chance that cigs will linger until as late as 21Z or 22Z. There is a 20-30% chance that cigs will not arrive tonight until after 06Z.

KBUR . Low confidence in TAF. There is a 30% chance that cigs will linger until as late as 18Z. There is a 30-40% chance of IFR to LIFR cigs after 09Z tonight.

MARINE. 27/815 AM.

Across the outer waters . Winds will be elevated and gusty today and there is a thirty percent chance of winds reaching Small Craft Advisory (SCA) level Wednesday and Thursday during the afternoon and evening hours. Otherwise, conditions will remain below SCA level through the forecast period.

Across the nearshore waters of the Central Coast . Conditions will remain below SCA level through the forecast period.

Across the inner waters south of Point Conception . There is a thirty percent chance of winds reaching SCA level across the western portion of the Santa Barbara Channel Wednesday and Thursday during the afternoon and evening hours. Otherwise, conditions will remain below SCA level through the forecast period.

Patchy fog, locally dense with visibility under one mile, will continue through Monday. The lowest visibility and most widely spread conditions will occur in the overnight and morning hours.

LOX WATCHES/WARNINGS/ADVISORIES. CA . Wind Advisory in effect from 3 AM to 3 PM PDT Monday for zones 53-54-88. (See LAXNPWLOX). Fire Weather Watch in effect from late tonight through Monday afternoon for zones 253-254-288. (See LAXRFWLOX). PZ . Small Craft Advisory in effect until 9 AM PDT this morning for zones 670-673. (See LAXMWWLOX).

.HAZARD POTENTIAL OUTLOOK (TUE-SAT).

Dangerously hot weather and near critical fire weather conditions are possible all of next week as strong high pressure builds across southwest California.



PUBLIC . MW/Kaplan AVIATION . DB MARINE . Kj SYNOPSIS . MW

weather.gov/losangeles


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
ICAC1 - 9410840 - Santa Monica Pier 8 mi56 min 68°F 69°F1012.9 hPa
46221 - Santa Monica Bay, CA (028) 11 mi81 min 71°F3 ft
46268 11 mi74 min 67°F 69°F2 ft
PXAC1 13 mi134 min SSE 4.1 G 6
BAXC1 14 mi128 min ESE 5.1 G 5.1
PSXC1 15 mi74 min SSE 1.9 G 4.1
OHBC1 - 9410660 - Los Angeles, CA 16 mi56 min 66°F1013 hPa
PFDC1 16 mi128 min Calm G 1
PFXC1 16 mi74 min SSE 4.1 G 4.1
AGXC1 17 mi128 min NE 1.9 G 1.9
PRJC1 18 mi74 min SE 4.1 G 5.1
46256 19 mi48 min 68°F2 ft
46222 - San Pedro, CA (092) 21 mi53 min 69°F3 ft
46253 27 mi48 min 69°F3 ft
46025 - Santa Monica Basin - 33NM West Southwest of Santa Monica, CA 34 mi44 min ESE 5.8 G 7.8 67°F 69°F1012.2 hPa (+1.0)64°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 mi51 minNE 38.00 miOvercast69°F61°F76%1012 hPa
Hawthorne, Hawthorne Municipal Airport, CA5 mi51 minN 010.00 miSmoke69°F61°F76%1012.2 hPa
Los Angeles / USC Campus Downtown, CA11 mi52 minN 05.00 miOvercast with Haze71°F62°F73%1011.8 hPa
Long Beach, Long Beach Airport, CA16 mi51 minN 08.00 miOvercast68°F62°F81%1012.3 hPa
Burbank - Bob Hope Airport, CA20 mi51 minN 04.00 miMostly Cloudy with Haze66°F60°F81%1011.4 hPa
Van Nuys, Van Nuys Airport, CA21 mi53 minN 04.00 miFair with Haze70°F61°F73%1011.6 hPa
Los Alamitos Army Airfield, CA22 mi46 minS 18.00 miOvercast70°F59°F69%1013.2 hPa
Fullerton, Fullerton Municipal Airport, CA24 mi51 minN 38.00 miOvercast71°F61°F71%1011.9 hPa
Los Angeles, Whiteman Airport, CA24 mi1.9 hrsN 01.50 miOvercast63°F62°F100%1013.9 hPa

Link to 5 minute data for KLAX

Wind History from LAX (wind in knots)
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Last 24hrSE43CalmW9W11W12W11W10W9W5SW6W4CalmCalmE3SE3E4E5SE3CalmCalmE5SE3NE3
1 day agoSE4W8W8W8W10W10W11W8W10W8W5W4W4CalmCalmCalmCalmCalmNE3CalmCalm4CalmCalm
2 days agoCalmSE3W10W11W9W9W11W11W7W8W3W3CalmCalmCalmCalmSE4E4E53SE5E5NE5SE4

Tide / Current Tables for El Segundo, Santa Monica Bay, California
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El Segundo
Click for Map
Sun -- 01:53 AM PDT     -0.12 feet Low Tide
Sun -- 02:42 AM PDT     Moonset
Sun -- 06:45 AM PDT     Sunrise
Sun -- 08:31 AM PDT     4.50 feet High Tide
Sun -- 01:50 PM PDT     2.08 feet Low Tide
Sun -- 04:59 PM PDT     Moonrise
Sun -- 06:42 PM PDT     Sunset
Sun -- 07:42 PM PDT     5.36 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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0.80.1-0.10.2123.144.44.44.13.42.72.22.12.433.94.75.25.34.942.8

Tide / Current Tables for Santa Monica, Municipal Pier, California (2)
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Santa Monica
Click for Map
Sun -- 01:46 AM PDT     -0.12 feet Low Tide
Sun -- 02:42 AM PDT     Moonset
Sun -- 06:45 AM PDT     Sunrise
Sun -- 08:21 AM PDT     4.58 feet High Tide
Sun -- 01:43 PM PDT     2.17 feet Low Tide
Sun -- 05:00 PM PDT     Moonrise
Sun -- 06:42 PM PDT     Sunset
Sun -- 07:32 PM PDT     5.48 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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0.70-0.10.31.12.23.34.14.64.54.13.42.72.32.22.53.24.14.95.45.44.93.92.7

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
Ground Weather Radar Station Santa Ana Mtns, CA
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