Friday, September18, 2020
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Marine Weather and Tides
Rancho Palos Verdes, 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 6:37AMSunset 6:56PM Friday September 18, 2020 9:09 AM PDT (16:09 UTC) Moonrise 7:57AMMoonset 8:10PM Illumination 2% Phase: Waxing Crescent; Moon at 1 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- 311 Am Pdt Fri Sep 18 2020
Today..Winds variable 10 kt or less, becoming W 10 to 15 kt in the afternoon. Wind waves 1 to 3 ft. Mixed swell W 2 to 3 ft at 8 seconds and S 2 ft at 9 seconds.
Tonight..W winds 10 to 20 kt with local gusts to 25 kt. Wind waves 1 to 3 ft. W swell 3 to 4 ft at 8 seconds. Patchy fog after midnight.
Sat..W winds 10 to 15 kt. Wind waves 1 to 3 ft. W swell 3 to 4 ft at 8 seconds. Patchy fog in the morning.
Sat night..W winds 10 to 15 kt, becoming 5 to 10 kt after midnight. Wind waves 1 to 3 ft. Mixed swell W 3 ft at 8 seconds and S 2 ft at 15 seconds. Patchy fog after midnight.
Sun..W winds 5 to 10 kt. Wind waves 2 ft or less. W swell 2 to 3 ft at 8 seconds. S swell 2 ft. Patchy fog in the morning.
Sun night..W winds 10 to 15 kt in the evening, becoming variable 10 kt or less. Wind waves 2 ft or less. W swell 2 to 3 ft at 8 seconds. Patchy fog after midnight.
Mon..W winds 10 to 15 kt. Wind waves 2 ft or less. W swell 2 to 3 ft. Patchy fog.
Tue..W winds 15 to 20 kt. Combined seas 2 to 3 ft. Patchy fog.
PZZ600 311 Am Pdt Fri Sep 18 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 1018 mb high pressure was 500 nm W of point conception and a 1008 mb thermal low was over far southeastern california. Patchy dense fog across much the coastal waters is possible through Friday morning. Gusty nw winds across the outer waters will lead to choppy, short-period seas through Saturday.


7 Day Forecast for Marine Location Near Rancho Palos Verdes, CA
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location: 33.7, -118.31     debug


Area Discussion for - Los Angeles/Oxnard, CA
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FXUS66 KLOX 181200 AFDLOX

Area Forecast Discussion . UPDATED National Weather Service Los Angeles/Oxnard CA 500 AM PDT Fri Sep 18 2020

SYNOPSIS. 17/838 PM.

Partly cloudy skies will persist through Friday except for smoky conditions for the San Gabriel Mountains and Antelope Valley. Mostly clear skies can be expected this weekend into next week, with coastal low clouds returning. There will be a modest cooling trend this weekend with additional cooling early next week due to a weak trough moving through California. Gusty north Canyon winds are expected across southern Santa Barbara County this evening, becoming stronger Friday evening.

SHORT TERM (TDY-SUN). 18/319 AM.

Skies are mostly cloudy this morning due to a grip of mid and high level clouds that were spun off of TS Karina. There are some patchy low clouds under the mid clouds at the Central Coast as well. The clouds will thin later this morning and by afternoon skies should be partly cloudy. Hgts will fall today as a trof moves through the state. This will bring bring several degrees of cooling to most of the area save for the SBA south coast where north flow will bring about 2 to 5 degrees of warming.

Tough marine layer fcst tonight as the cool air advection and mixing from the trof (hinder stratus development)fight the eddy and clear skies (enhance stratus development). Have some low clouds for the Central Coast and the LA south coast but would not be surprised if no stratus developed. Good north flow develops over SBA county and it will produce a Sundowner with 40 to 45 mph gusts. Wind advisories will likely be issued for these gusts later this afternoon. The rest of Saturday will be sunny but noticeably cooler due to the all the cool air ushered in by today's trof. Max temps will drop 3 to 5 degrees across most of the area. Most max temps, however, will end up 2 to 4 degrees above normal except for the Central Coast which will end up 1 to 3 degrees blo normal.

A better eddy and better onshore flow will bring low clouds to most of the coastal areas Saturday night. The SBA south coast will be the exception as another round of advisory level Sundowner winds will set up although the winds will be about 5 mph lighter compared to tonight.

Flat flow will be over the area Sunday. The greater marine layer influence will cool the temps across the coasts and vlys while the interior will warm as all of Saturday's cool air modifies.

LONG TERM (MON-THU). 18/332 AM.

Both the GFS and EC are agree that the flat flow will turn slightly cyclonic on Monday and will persist into Tuesday. The onshore flow will increase and there will be a decent night through morning low cloud and fog pattern. There will be enough of as increase in the west to east onshore flow to create gusty (35 to 40 mph gusts) across the Hwy 14 Corridor into the Antelope Valley during the afternoons through early evening hours. There will be more cooling Monday with most areas ending up 2 to 3 degrees blo normal. Not much changes on Tuesday and the weather should look very similar to Monday's.

On Wednesday, a ridge builds in from the SW and hgts rise to 592 DaM. The onshore flow relaxes and the marine layer coverage will shrink back to the beaches. Look for 3 to 6 degrees of warming.

More offshore flow on Thu should eliminate the marine layer. Hgts stay the about the same. The sunny skies and increased offshore flow will add another 2 to 4 degrees of warming to the area. This warming will bring most max temps to 3 to 6 degrees above normal.

AVIATION. 18/1158Z.

At 1112Z at KLAX, there was no marine layer.

Good confidence in inland TAFs, and moderate confidence in coastal TAFs after 06z due to uncertainty in marine layer clouds.

KLAX . Moderate confidence in TAF through 16Z. There is a 20% chance of OVC004 cigs or 2SM vis 12Z- 16Z. High confidence that there will be no east wind component greater than 8 kt.

KBUR . High confidence in TAF. There is a slight chance of MVFR vis due to smoke 12Z-16Z.

MARINE. 18/327 AM.

Overall, moderate to high confidence in forecast. High confidence in Small Craft Advisory (SCA) level winds continuing across the outer waters along the Central Coast to San Nicolas Island through Saturday night. From Point Conception to San Nicolas Island, there is a 40% chance of gale force gusts Friday evening. Friday evening, SCA level winds will affect western portion of the Santa Barbara Channel, persisting through Saturday night. High confidence that winds will drop below SCA level Sunday through Monday.

Patchy dense fog is possible over most of the coastal waters tonight through Friday morning.

An elevated south swell of 3 to 4 feet with a period of 9 to 10 seconds will linger through at least Friday morning.

LOX WATCHES/WARNINGS/ADVISORIES. CA . NONE. PZ . Small Craft Advisory in effect from 7 PM this evening to 3 AM PDT Sunday for zone 650. (See LAXMWWLOX). Small Craft Advisory in effect until 3 AM PDT Sunday for zones 670-673-676. (See LAXMWWLOX).

.HAZARD POTENTIAL OUTLOOK (SUN-THU).

No significant hazards expected.



PUBLIC . Rorke AVIATION . Rorke/Phillips MARINE . Stewart/Phillips SYNOPSIS . Sirard

weather.gov/losangeles


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
OHBC1 - 9410660 - Los Angeles, CA 2 mi69 min 64°F1012.2 hPa (+0.6)
AGXC1 4 mi105 min SW 4.1 G 5.1
PFDC1 4 mi105 min Calm G 0
PXAC1 5 mi123 min Calm G 1
46222 - San Pedro, CA (092) 6 mi78 min 68°F2 ft
46256 6 mi73 min 64°F3 ft
BAXC1 6 mi105 min N 1.9 G 2.9
PFXC1 6 mi69 min SSW 1.9 G 2.9
PSXC1 6 mi69 min SW 1.9 G 2.9
PRJC1 7 mi69 min WSW 4.1 G 5.1
46253 11 mi73 min 67°F2 ft
46221 - Santa Monica Bay, CA (028) 20 mi46 min 69°F3 ft
ICAC1 - 9410840 - Santa Monica Pier 24 mi69 min WNW 5.1 G 6 69°F 68°F1012 hPa (+0.6)
46268 26 mi69 min 67°F 68°F2 ft
46025 - Santa Monica Basin - 33NM West Southwest of Santa Monica, CA 39 mi49 min NNW 7.8 G 9.7 69°F 71°F1011.7 hPa65°F

Wind History for Angels Gate, CA
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Long Beach, Long Beach Airport, CA12 mi76 minN 07.00 miFair69°F59°F70%1011.4 hPa
Los Alamitos Army Airfield, CA15 mi71 minE 310.00 miA Few Clouds72°F57°F61%1012.2 hPa
Hawthorne, Hawthorne Municipal Airport, CA16 mi76 minN 08.00 miSmoke68°F59°F73%1011.2 hPa
Los Angeles, Los Angeles International Airport, CA17 mi76 minN 09.00 miPartly Cloudy68°F60°F76%1011.1 hPa
Fullerton, Fullerton Municipal Airport, CA21 mi76 minESE 310.00 miFair72°F46°F40%1010.8 hPa
Avalon Catalina Airport, CA21 mi78 minW 410.00 miFair86°F0°F3%1010.4 hPa
Los Angeles / USC Campus Downtown, CA22 mi77 minN 05.00 miFair with Haze70°F55°F59%1010.8 hPa
John Wayne-Orange County Airport, CA23 mi76 minESE 510.00 miMostly Cloudy71°F57°F63%1011.2 hPa

Link to 5 minute data for KTOA

Wind History from TOA (wind in knots)
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Last 24hr----------------------------CalmCalmCalmW4W11W11W16W15W13
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1 day ago----------------------------W3W3W5W6W9W10W11W12--W11
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2 days ago----------------------------CalmCalmW4W8W8W14W13W14W14W11

Tide / Current Tables for Los Angeles, California
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Los Angeles
Click for Map
Fri -- 04:22 AM PDT     -0.14 feet Low Tide
Fri -- 06:38 AM PDT     Sunrise
Fri -- 07:57 AM PDT     Moonrise
Fri -- 10:35 AM PDT     5.82 feet High Tide
Fri -- 04:41 PM PDT     0.32 feet Low Tide
Fri -- 06:54 PM PDT     Sunset
Fri -- 08:10 PM PDT     Moonset
Fri -- 10:49 PM PDT     5.81 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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4.83.41.80.6-0.100.82.13.64.95.75.85.13.92.51.30.50.40.923.44.75.65.8

Tide / Current Tables for Long Beach, Terminal Island, California
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Long Beach
Click for Map
Fri -- 04:19 AM PDT     -0.24 feet Low Tide
Fri -- 06:38 AM PDT     Sunrise
Fri -- 07:57 AM PDT     Moonrise
Fri -- 10:33 AM PDT     5.88 feet High Tide
Fri -- 04:38 PM PDT     0.31 feet Low Tide
Fri -- 06:54 PM PDT     Sunset
Fri -- 08:09 PM PDT     Moonset
Fri -- 10:45 PM PDT     5.94 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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4.93.31.70.4-0.2-0.10.82.23.755.85.85.13.92.51.20.50.412.13.64.95.75.9

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.
Link to Loop

Other links: Northern Pacific     Contential US     Full GOES-East
Ground Weather Radar Station Santa Ana Mtns, CA
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