Wednesday, September23, 2020
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Marine Weather and Tides
Lomita, 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 6:40AMSunset 6:48PM Wednesday September 23, 2020 12:15 PM PDT (19:15 UTC) Moonrise 1:44PMMoonset 11:47PM Illumination 40% Phase: Waxing Crescent; Moon at 6 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- 907 Am Pdt Wed Sep 23 2020
Today..Winds variable 10 kt or less, becoming W 10 to 15 kt in the afternoon. Wind waves 2 ft or less. Mixed swell W 2 ft at 8 seconds and sw 2 ft at 16 seconds. Areas of dense fog with vsby 1 nm or less in the morning.
Tonight..W winds 10 to 15 kt, becoming sw 5 to 10 kt after midnight. Wind waves 2 ft or less. Mixed swell W 2 ft at 7 seconds and sw 2 ft at 15 seconds. Patchy dense fog with vsby 1 nm or less after midnight.
Thu..Winds variable 10 kt or less, becoming sw 10 to 15 kt in the afternoon. Wind waves 2 ft or less. Mixed swell W 2 to 3 ft at 8 seconds and S 3 ft at 11 seconds. Patchy dense fog with vsby 1 nm or less in the morning.
Thu night..W winds 10 to 15 kt in the evening, becoming variable 10 kt or less. Wind waves 2 ft or less. Mixed swell W 2 to 4 ft at 8 seconds and S 3 ft at 11 seconds. Patchy fog after midnight.
Fri..E winds 5 to 10 kt, becoming S 10 to 15 kt in the afternoon. Wind waves 2 ft or less. W swell 3 to 4 ft at 9 seconds. Patchy fog in the morning.
Fri night..W winds 10 to 15 kt in the evening, becoming variable 10 kt or less. Wind waves 2 ft or less. W swell 3 to 4 ft at 11 seconds. Patchy fog after midnight.
Sat..SW winds 10 to 15 kt. Wind waves 2 ft or less. Mixed swell W 2 to 4 ft and S 2 ft. Patchy fog.
Sun..W winds 10 to 15 kt. Wind waves 2 ft or less. Mixed swell W 2 ft and S 2 ft.
PZZ600 907 Am Pdt Wed Sep 23 2020
Synopsis for the southern california coast and santa barbara channel including the channel islands national marine sanctuary and national park..At 16z, or 9 am pdt, a 1021 mb surface high pressure center was located 800 nm west southwest of point conception. A 1013 mb thermal low was centered just south of los vegas. The high will strengthen through Thu, causing nw winds to increase across the outer and northern coastal waters. Patchy dense fog with visibility one nautical mile or less will affect the waters this morning.


7 Day Forecast for Marine Location Near Lomita, CA
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location: 33.77, -118.25     debug


Area Discussion for - Los Angeles/Oxnard, CA
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FXUS66 KLOX 231808 AFDLOX

Area Forecast Discussion National Weather Service Los Angeles/Oxnard CA 1108 AM PDT Wed Sep 23 2020

SYNOPSIS. 23/257 AM.

Ridging aloft will build in today and bring a modest warm-up from yesterday. Temperatures will cool slightly after that through Friday. By this weekend, another ridge aloft will build in and temperatures will be above normal into the weekend, then a significant warming trend is forecast for early next week as high pressure aloft strengthens and becomes the dominant weather feature across the area. Night through morning low clouds and fog will become more confined to a few coastal areas over the next several days.

SHORT TERM (TDY-FRI). 23/932 AM.

The marine layer has shrunk to a 1000' or less and the lower ceilings have reduced visibilities to under a quarter mile in some coastal communities and over the coastal waters. This is thanks to building high pressure aloft, which also will be responsible for a brief and relatively minor warm up today. Will likely make one minor change to the forecast tonight by adding at least one more night of stratus along the Ventura and SB coastal areas. There is a light northerly flow that develops over srn SB County tonight but it doesn't look strong enough to have that much of an impact on the stratus south of Pt Conception and the HREF model would seem to agree with this. Otherwise likely minimal changes to the forecast expected.

***From Previous Discussion***

Synoptically, a 594 DM High will be building in from the south across the southern half of California today. This will keep a strong storm system well to the north across the PAC NW over the next few days. The building high will help bump high temps up a few more degrees today. Temps will bump up a few degrees above normal but nothing too unusual for this time of year. The upper trough to the north will dip farther south into northern California allowing for a brief cooling trend Thu/Fri with only a modest cool down. Some northerly winds expected in srn SB County each evening starting this evening but so far models are keeping wind speeds mostly below advisory levels. Winds should be somewhat stronger Thursday night into early Friday morning with local gusts to 40 mph between Gaviota and Refugio, and lower gusts across the Montecito foothills. The Marine layer stratus will likely be confined to LA and possibly Ventura County with the increase in northerly flow over the next few nights and northeast flow from the San Lucia Mtns keeping the Central Coast mostly clear.

LONG TERM (SAT-TUE). 23/248 AM.

By Saturday and elongated west to east ridge starts to build in over the west coast into the southwest states. There will be a 3-6 degree warm up initially on Saturday, and highs are expected to reach the upper 90s to around 103 in the warmest valleys by Sunday as the high strengthens overhead to around 595 DM. By Monday, the upper ridge expands and covers much of the PAC NW into Texas. Both the GFS and EC are indicating a strengthening offshore surface gradient and this will be the kicker to drive high temps even higher both Mon/Tue. It looks like valleys will reach at least 105 degrees across LA/VTU Counties. Overnight Lows across the elevated valley locations and foothills could reach the upper 70s and possibly the 80s. Have trended low temps up for the extended, but staying in the 70s for now.

From the earlier discussion . The 27th is the anniversary of the all time Downtown LA high of 113 and the records for Monday are only a few degrees lower so Tuesday would probably be our best chance for record highs but even then it would be a stretch unless some of the minority become more favored in subsequent model runs.

AVIATION. 23/1807Z.

At 1736Z, the marine layer was around 300 ft deep at KLAX. The top of the inversion was near 2600 ft with a temp of 24 Celsius.

Low clouds were widespread in coastal areas south of Pt Conception, but just patchy in nature on the Central Coast. Conds were mostly LIFR to VLIFR, except IFR across coastal sections of L.A. County. Expect low clouds to be confined to coastal sections south of Point Conception tonight, with generally IFR/LIFR conds expected. KLAX . Moderate confidence in the 18Z TAF. There is a 20-30% chance that IFR conds will not arrive until 12Z tonight. There is a 30 percent chance of marine clouds arriving plus or minus two or more hours from forecasted time.

KBUR . High confidence in the 18Z TAF with VFR conds expected thru the pd.

MARINE. 23/954 AM.

Across the outer waters, Small Craft Advisory (SCA) level NW winds will spread southward today, reaching the southern outer waters zone (PZZ676) this evening. SCA level winds will continue through Sat, except possibly only through Fri night in the southern zone. There is a 40-50% chance of Gale Force winds Thu afternoon through late Thu night, so a Gale Watch has been issued for that time period. Large seas will affect the outer waters Thu night through Fri night or early Sat.

Across the inner waters north of Point Sal, there is a 40% chance of SCA level winds this afternoon and evening. SCA level winds are likely during the afternoon and evening hours Thu, and are possible again Fri. However seas will likely remain at or above SCA levels Thu night through Fri night or early Sat.

Across the inner waters south of Pt Conception, there is a 30% chance of SCA level winds across western portion of the SBA Channel late this afternoon and evening, and a 40% chance of SCA level winds there late Thu afternoon and evening. Otherwise, SCA conds are not expected through Sun.

Patchy dense fog will affect the coastal waters this morning and again tonight and Thu morning.

LOX WATCHES/WARNINGS/ADVISORIES. CA . NONE. PZ . Small Craft Advisory in effect until 3 PM PDT Thursday for zone 670. (See LAXMWWLOX). Gale Watch in effect from Thursday afternoon through late Thursday night for zones 670-673-676. (See LAXMWWLOX). Small Craft Advisory in effect from 3 PM this afternoon to 3 PM PDT Thursday for zone 673. (See LAXMWWLOX). Small Craft Advisory in effect from 9 PM this evening to 3 PM PDT Thursday for zone 676. (See LAXMWWLOX).

.HAZARD POTENTIAL OUTLOOK (FRI-TUE).

Strong high pressure is expected to build over the West Coast Sunday through Tuesday. Heat stress and elevated fire weather conditions will be possible, especially Monday and Tuesday.



PUBLIC . MW/Kaplan AVIATION . Sweet/DB MARINE . Sweet/DB SYNOPSIS . Kaplan/Hall

weather.gov/losangeles


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
BAXC1 1 mi93 min SE 4.1 G 5.1
PSXC1 1 mi45 min S 6 G 7
PXAC1 1 mi93 min S 4.1 G 6
PFDC1 2 mi105 min S 5.1 G 7
PFXC1 2 mi45 min SSW 8 G 8
AGXC1 4 mi93 min SW 8 G 8
OHBC1 - 9410660 - Los Angeles, CA 4 mi45 min 64°F1017.8 hPa
PRJC1 4 mi45 min SW 6 G 7
46256 5 mi49 min 67°F2 ft
46222 - San Pedro, CA (092) 11 mi54 min 67°F2 ft
46253 14 mi19 min 69°F2 ft
46221 - Santa Monica Bay, CA (028) 21 mi52 min 70°F2 ft
ICAC1 - 9410840 - Santa Monica Pier 21 mi45 min W 5.1 G 6 65°F 68°F1017.9 hPa
46268 25 mi45 min 66°F 68°F2 ft
46025 - Santa Monica Basin - 33NM West Southwest of Santa Monica, CA 42 mi25 min W 1.9 G 3.9 64°F 69°F2 ft1017.4 hPa60°F

Wind History for Los Angeles Berth 161,
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Torrance, Zamperini Field Airport, CA5 mi23 minWNW 76.00 miA Few Clouds with Haze73°F64°F74%1016.9 hPa
Long Beach, Long Beach Airport, CA7 mi22 minS 66.00 miFair with Haze77°F63°F62%1016.7 hPa
Los Alamitos Army Airfield, CA11 mi17 minSW 67.00 miFair77°F62°F61%1017.6 hPa
Hawthorne, Hawthorne Municipal Airport, CA12 mi22 minWSW 85.00 miHaze Smoke77°F62°F60%1016.7 hPa
Los Angeles, Los Angeles International Airport, CA14 mi22 minW 95.00 miA Few Clouds with Haze73°F61°F66%1016.8 hPa
Fullerton, Fullerton Municipal Airport, CA16 mi22 minSSW 48.00 miFair83°F57°F41%1016.2 hPa
Los Angeles / USC Campus Downtown, CA17 mi23 minN 06.00 miFair with Haze81°F59°F47%1016 hPa
John Wayne-Orange County Airport, CA21 mi22 minSSW 66.00 miA Few Clouds with Haze80°F62°F54%1016.4 hPa

Link to 5 minute data for KTOA

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Last 24hrW13W12W14W13W16W13----------------------------CalmCalmNW5W7
1 day agoW11W12W12W14W16W15----------------------------W3CalmW8W9
2 days agoNW5W10W13W12W13W12----------------------------Calm4NW4W9

Tide / Current Tables for Long Beach, Inner Harbor, California
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Long Beach
Click for Map
Wed -- 04:06 AM PDT     3.38 feet High Tide
Wed -- 06:42 AM PDT     Sunrise
Wed -- 08:10 AM PDT     2.79 feet Low Tide
Wed -- 01:43 PM PDT     Moonrise
Wed -- 02:46 PM PDT     5.11 feet High Tide
Wed -- 06:47 PM PDT     Sunset
Wed -- 06:56 PM PDT     First Quarter
Wed -- 10:44 PM PDT     0.41 feet Low Tide
Wed -- 11:46 PM PDT     Moonset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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1.72.32.93.23.43.33.12.92.82.93.13.64.14.755.14.94.33.52.61.70.90.50.4

Tide / Current Tables for Los Patos (highway bridge), California
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Los Patos (highway bridge)
Click for Map
Wed -- 05:01 AM PDT     2.92 feet High Tide
Wed -- 06:41 AM PDT     Sunrise
Wed -- 09:17 AM PDT     1.74 feet Low Tide
Wed -- 01:42 PM PDT     Moonrise
Wed -- 03:42 PM PDT     4.42 feet High Tide
Wed -- 06:46 PM PDT     Sunset
Wed -- 06:56 PM PDT     First Quarter
Wed -- 11:45 PM PDT     Moonset
Wed -- 11:51 PM PDT     0.26 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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0.81.31.92.52.82.92.82.421.81.82.12.63.33.94.34.44.23.732.21.40.80.4

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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