Sunday, April5, 2020
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Marine Weather and Tides
Lomita, 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 6:32AMSunset 7:18PM Sunday April 5, 2020 12:50 PM PDT (19:50 UTC) Moonrise 4:46PMMoonset 5:20AM Illumination 95% Phase: Waxing Gibbous; Moon at 13 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- 912 Am Pdt Sun Apr 5 2020
.small craft advisory in effect from this evening through Monday afternoon...
Today..SW winds 5 to 10 kt. Wind waves 2 ft or less. S swell 2 ft at 11 seconds. Slight chance of rain in the morning, then chance of rain.
Tonight..SW winds 10 to 15 kt, becoming S 10 to 20 kt with gusts to 25 kt after midnight. Combined seas 4 to 6 ft dominant period 8 seconds. Chance of rain in the evening, then rain and slight chance of tstms.
Mon..S winds 15 to 20 kt, becoming sw 10 to 20 kt in the afternoon. Gusts to 25 kt. Combined seas 4 to 5 ft dominant period 8 seconds. Rain and slight chance of tstms.
Mon 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 ft at 9 seconds and S 2 ft at 20 seconds. Chance of showers in the evening. Slight chance of tstms.
Tue..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 tstms.
Tue night..W winds 5 to 10 kt. Wind waves 2 ft or less. Mixed swell W 2 ft at 9 seconds and S 3 ft at 18 seconds. Slight chance of tstms in the evening. Chance of showers.
Wed..W winds 10 to 15 kt. Wind waves 2 ft or less. Mixed swell W 2 ft and S 3 ft. Chance of showers.
Thu..W winds 5 to 10 kt. Wind waves 2 ft or less. S swell 3 ft. Slight chance of showers.
PZZ600 912 Am Pdt Sun Apr 5 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 998 mb low was just off the southern oregon coast with a cold front extending south of the low. This storm system will impact the coastal waters through Thursday and there is a slight chance of Thunderstorms this afternoon through Wednesday. Gusty southerly winds will impact the waters today and tonight ahead of the cold front.


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 051749 AFDLOX

Area Forecast Discussion National Weather Service Los Angeles/Oxnard CA 1049 AM PDT Sun Apr 5 2020

SYNOPSIS. 05/820 AM.

Significant rain and mountain snow will move across the region today and Monday with lingering showers possible through Thursday. There is a slight chance of thunderstorms tonight through Tuesday including across the coastal waters and some snow will fall on the major passes by Tuesday morning. Friday will be dry and warmer.

SHORT TERM (TDY-TUE). 05/903 AM.

A moist onshore flow out ahead of a Pacific storm system kept plenty of low clouds and even some showers over portions of the forecast area this morning, A more organized band of rain was starting to move into NW SLO County as well. Rain will increase across SLO/SBA Counties thru this afternoon, with additional showers expanding across VTU/L.A. Counties. Snow levels today will be near 6000 ft with some light snow accumulation possible.

We remain on track for significant and unseasonable amounts of pcpn over the next few days. In fact, there is the potential for many areas to recieve rainfall far exceeding what we normally see for the entire month of April, including downtown L.A. where the normal April rainfall is 0.91 inch. This should help to go a long way to bringing seasonal rainfall totals for many areas closer to normal or possibly even above normal in some locations.

An unseasonably strong upper level low pressure system was centered just off the nrn CA coast this morning. This upper level low is forecast to very slowly move S to a position off the central CA coast on Mon, then to just SW of Point Conception on Tue. This system will bring a late season February-like storm to the region.

At the surface, a band of moderate to heavy rain is expected with the main storm front starting over SLO/SBA Counties later today into this evening, then push into VTU County by midnight. The focus of the heavier pcpn will move into L.A. County late tonight and Mon as the front edges E, altho additional showers will affect much of the rest of the forecast area. Strong and gusty gusty S to SE winds can also be expected along and ahead of the front, bringing enhanced orographic pcpn to the S facing foothills and mtns. Wraparound moisture will bring additional showers across the region Mon night and Tue as the upper level low lingers nearby.

Additionally, there will be enough instability and upper level diffluence to warrant a mention of a slight chance of thunderstorms for many areas tonight through Tue evening. Any thunderstorms that develop would be capable of producing heavy precipitation, gusty winds, small hail and dangerous cloud-to-ground lightning.

Rainfall totals through Tue are expected to generally range from 1.00-2.00 inches for the coastal/valley areas with 1.50-3.00 inches in the foothills and mountains. Local rain totals to 4.00 inches will be possible in some mountain areas. Rainfall rates of 0.25-0.50 inches/hour are expected with local rates up to 0.75 inches per hour. With any thunderstorm activity, hourly rainfall rates could even be higher. With these rainfall totals, there will likely be widespread nuisance urban flooding as well as the potential for minor mud and debris flows near the recent burn areas.

Snow levels will continue near 6000 feet through Mon morning then drop to 5000-5500 feet Monday afternoon, and to 4000-4500 feet Mon night and Tue morning. There will likely be significant snow accumulations, especially above 6000 feet. With the heavy snow and strong gusty winds expected, a WINTER STORM WARNING is in effect for the Ventura/LA county mountains from late this afternoon/evening through Tuesday afternoon. Wind gusts up to 45 to 60 mph are expected in the high mountains, as well as snow accumulations of 1 to 2 feet or more above 6000 feet, and about 4 to 12 inches between 4500 and 6000 feet. In addition, lower snow levels late Mon night into Tue morning will likely result in travel delays along Interstate 5 over the Grapevine. Please see the latest Winter Weather Message (LAXWSWLOX) for further details.

LONG TERM (WED-SAT). 05/215 AM.

For the extended, 00Z models do not exhibit much synoptic agreement. Main issue is the handling of the upper low as the GFS is more progressive with this feature than the ECMWF. Either solution keeps a moist and unstable air mass over the area on Wednesday, resulting in a continued threat of showers for all areas. On Thursday, the GFS solution would generally be dry while the ECMWF continues to generate showers. So, will split the difference for Thursday, indicating a lesser threat of showers than Wednesday. Additional rainfall totals with this activity on Wednesday/Thursday will generally range between 0.25 and 0.75 inches with high variability from place to place. Snow levels will be on the increase Wednesday (5000-6000 feet) and Thursday (6500-7500 feet), so anticipate lessening winter weather impacts.

For Friday/Saturday, an upper-level ridge will develop off the West Coast. With increasing thicknesses and H5 heights, temperatures should exhibit a warming trend Friday/Saturday while dry conditions prevail.

AVIATION. 05/1748Z.

At 1539Z, there was no marine inversion at KLAX. However, there was a moist layer up to 5000 feet.

Overall, low to moderate confidence in 18Z TAFs. Steady rain will spread over the region from northwest to southeast, but low confidence in timing of rain and associated flight categories. Cigs/vis will most likely be MVFR, but there is a 40% chance of IFR conditions, especially in heavier rainfall. There will be a slight chance of thunderstorms for all sites this evening through Monday morning.

KLAX . Low to moderate confidence in 18Z TAF. MVFR cigs continuing into the early afternoon with occasional IFR conditions afterward. Steady rain will most likely develop in the evening, but low confidence in timing (could be +/- 2 hours of current forecast). Southeast winds in excess of 10 kt are expected after 10z.

KBUR . Low to moderate confidence in 18Z TAF. MVFR cigs continuing into the early afternoon with occasional IFR conditions afterward. Steady rain will most likely develop in the evening, but low confidence in timing (could be +/- 2 hours of current forecast).

MARINE. 05/937 AM.

Overall, moderate to high confidence in current forecast. A storm system moving south along the California coast will push a cold front into the region today, bringing gusty south winds. High confidence in Small Craft Advisory (SCA) level winds developing this morning into this afternoon along the waters along the Central Coast southward to San Nicolas Island. Less confidence in exact timing, but SCA level winds will generally develop from north to south, potentially reaching Point Conception around noon. The cold front will move quickly, so winds will likely drop off below SCA level pretty quickly late tonight from north to south. There is a 60% chance of SCA level winds developing within the Santa Barbara Channel this afternoon and evening. By late tonight, moderate confidence in SCA level winds reaching the waters inside the Southern California Bight lasting through Monday late morning or early afternoon. These winds will likely produce steep, short-period choppy seas today and into early Monday. For all the coastal waters, thunderstorms will be possible from this evening through Tuesday evening. Any thunderstorms will be capable of producing brief heavy rain, small hail, rough seas, and possibly waterspouts.

High confidence that winds and seas will remain below SCA level from Monday afternoon through next week.

LOX WATCHES/WARNINGS/ADVISORIES. CA . Winter Storm Warning in effect from 5 PM this afternoon to 5 PM PDT Tuesday for zone 53. (See LAXWSWLOX). Winter Storm Warning in effect from 11 PM this evening to 5 PM PDT Tuesday for zone 54. (See LAXWSWLOX). PZ . Small Craft Advisory in effect until 11 PM PDT this evening for zones 645-670. (See LAXMWWLOX). Small Craft Advisory in effect from 3 PM this afternoon to 3 AM PDT Monday for zones 650-676. (See LAXMWWLOX). Small Craft Advisory in effect from 11 PM this evening to 3 PM PDT Monday for zone 655. (See LAXMWWLOX). Small Craft Advisory in effect until 3 AM PDT Monday for zone 673. (See LAXMWWLOX).

.HAZARD POTENTIAL OUTLOOK (TUE-SAT).

Numerous rain and mountain snow showers are expected Tuesday and Wednesday, with a slight chance of thunderstorms for much of the period. Showers will decrease on Thursday. Impacts will include minor urban flooding and difficult mountain travel.



PUBLIC . Sirard/Thompson AVIATION . Sweet/Stewart MARINE . Sweet/Stewart SYNOPSIS . Kj

weather.gov/losangeles


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
PSXC1 1 mi51 min SSE 7 G 8.9
BAXC1 1 mi105 min SE 8.9 G 11
PXAC1 1 mi111 min SSW 7 G 9.9
PFDC1 2 mi105 min SSW 6 G 8
PFXC1 2 mi51 min SW 6 G 8
AGXC1 4 mi105 min WSW 7 G 8.9
OHBC1 - 9410660 - Los Angeles, CA 4 mi51 min 62°F1013.8 hPa (+0.0)
PRJC1 4 mi51 min WSW 8 G 8
46256 5 mi21 min 62°F3 ft
46222 - San Pedro, CA (092) 11 mi28 min 61°F2 ft
46253 14 mi83 min 61°F3 ft
46221 - Santa Monica Bay, CA (028) 21 mi25 min 61°F2 ft
ICAC1 - 9410840 - Santa Monica Pier 21 mi51 min WSW 8.9 G 9.9 57°F 62°F1013.8 hPa (+0.5)
46025 - Santa Monica Basin - 33NM West Southwest of Santa Monica, CA 43 mi31 min SSW 7.8 G 9.7 56°F 61°F1013.5 hPa53°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 mi64 minS 810.00 miMostly Cloudy63°F53°F73%1013.2 hPa
Long Beach, Long Beach Airport, CA7 mi58 minS 510.00 miMostly Cloudy61°F45°F56%1013.1 hPa
Los Alamitos Army Airfield, CA11 mi1.9 hrsENE 410.00 miPartly Cloudy58°F49°F71%1013.5 hPa
Hawthorne, Hawthorne Municipal Airport, CA12 mi58 minWSW 810.00 miMostly Cloudy60°F46°F60%1013.3 hPa
Los Angeles, Los Angeles International Airport, CA14 mi58 minWSW 1010.00 miMostly Cloudy62°F46°F58%1013 hPa
Fullerton, Fullerton Municipal Airport, CA16 mi58 minESE 510.00 miMostly Cloudy60°F53°F78%1012.9 hPa
Los Angeles / USC Campus Downtown, CA17 mi59 minN 010.00 miOvercast63°F46°F56%1012.6 hPa
John Wayne-Orange County Airport, CA21 mi58 minSW 710.00 miOvercast63°F51°F65%1013.1 hPa
Santa Monica, Santa Monica Municipal Airport, CA21 mi60 minVar 610.00 miOvercast60°F48°F65%1013.1 hPa

Link to 5 minute data for KTOA

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Last 24hrW3W444S10W7W9W9--------------------SW5W55SW9--S8
1 day agoE3S7SW9W10W12W7SW7SW3--------------------CalmCalmSE6E4SE6Calm
2 days agoSE9
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W11----SW11W11----------------------SE35SE9SE8E8

Tide / Current Tables for Long Beach, Inner Harbor, California
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Long Beach
Click for Map
Sun -- 01:57 AM PDT     1.08 feet Low Tide
Sun -- 05:19 AM PDT     Moonset
Sun -- 06:34 AM PDT     Sunrise
Sun -- 07:56 AM PDT     5.36 feet High Tide
Sun -- 02:33 PM PDT     -0.78 feet Low Tide
Sun -- 04:45 PM PDT     Moonrise
Sun -- 07:17 PM PDT     Sunset
Sun -- 08:52 PM PDT     4.83 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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21.31.11.42.13.24.35.15.4542.71.30-0.7-0.7-0.11.12.53.74.64.84.43.5

Tide / Current Tables for Los Patos (highway bridge), California
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Los Patos (highway bridge)
Click for Map
Sun -- 03:04 AM PDT     0.67 feet Low Tide
Sun -- 05:18 AM PDT     Moonset
Sun -- 06:33 AM PDT     Sunrise
Sun -- 08:52 AM PDT     4.63 feet High Tide
Sun -- 03:40 PM PDT     -0.49 feet Low Tide
Sun -- 04:45 PM PDT     Moonrise
Sun -- 07:16 PM PDT     Sunset
Sun -- 09:48 PM PDT     4.18 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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2.41.60.90.70.91.62.63.74.44.64.33.52.41.30.3-0.4-0.5012.23.344.23.8

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 (15,3,4,5)
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Ground Weather Radar Station Santa Ana Mtns, CA
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Disclaimer:
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.