Saturday, January18, 2020
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Marine Weather and Tides
Hermosa Beach, 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 6:56AMSunset 5:10PM Friday January 17, 2020 9:46 PM PST (05:46 UTC) Moonrise 12:58AMMoonset 12:48PM Illumination 45% Phase: Third Quarter Moon; Moon at 23 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- 825 Pm Pst Fri Jan 17 2020
Tonight..N to ne winds 5 to 10 kt. Wind waves 2 ft or less. W swell 2 to 3 ft at 11 seconds.
Sat..NE winds 5 to 10 kt, becoming nw 10 to 15 kt in the afternoon. Wind waves 2 ft or less. W swell 2 ft at 11 seconds.
Sat night..NW winds 10 to 15 kt, becoming ne 5 to 15 kt after midnight. Wind waves 2 ft or less. W swell 2 ft at 10 seconds.
Sun..From point mugu to santa Monica, ne winds 10 to 20 kt becoming nw 5 to 10 kt in the afternoon. Elsewhere, winds variable 10 kt or less becoming W 5 to 10 kt in the afternoon. Wind waves 1 to 3 ft. W swell 2 ft at 13 seconds.
Sun 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 15 seconds.
Mon..Winds variable 10 kt or less, becoming W 10 kt in the afternoon. Wind waves 2 ft or less. W swell 2 to 3 ft at 14 seconds.
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 14 seconds. Slight chance of showers.
Tue..W winds 10 to 15 kt. Wind waves 2 ft or less. W swell 3 to 5 ft. Slight chance of showers.
Wed..NW winds 10 to 15 kt. Wind waves 2 ft or less. W swell 3 to 5 ft.
PZZ600 825 Pm Pst Fri Jan 17 2020
Synopsis for the southern california coast and santa barbara channel including the channel islands national marine sanctuary and national park..At 03z or 7 pm pst, a 1027 mb high was centered about 150 nm nw of point conception and extended into nevada. High pressure will build over the great basin over the weekend.


7 Day Forecast for Marine Location Near Hermosa Beach, CA
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location: 33.85, -118.4     debug


Area Discussion for - Los Angeles/Oxnard, CA
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FXUS66 KLOX 180427 AFDLOX

Area Forecast Discussion National Weather Service Los Angeles/Oxnard CA 827 PM PST Fri Jan 17 2020

SYNOPSIS. 17/757 PM.

High pressure will build over the area while weak northeasterly flow develops near the surface. This will result in dry and warmer conditions through Sunday. Some gusty winds will develop over the weekend for eastern Ventura County and northern LA County. For early next week, cloudy and cooler conditions are expected with a chance of light showers by Tuesday.

SHORT TERM (FRI-MON). 17/825 PM.

Current satellite imagery showing some high clouds drifting over the region, which will continue at times through the weekend. In addition some low clouds and fog are redeveloping this evening across the interior mountains of Ventura County, Cuyama Valley, and interior SLO County Valleys. The low clouds and fog are expected to expand westward across these areas overnight into Saturday morning, with the possibility of patchy dense fog. Residual cool air mass in place tonight combined with fairly light winds will bring a chilly night to much of the region. In evening update, did raise minimum temperatures a few degrees across the Central Coast tonight due to increasing high clouds overnight.

Offshore flow will strengthen during the morning hours through the weekend, with peak LAX-Daggett gradient expected to be around -4.5 mb on Saturday morning, increasing to around -5.5 mb on Sunday morning. The upper level support is rather weak through the weekend, so expecting offshore winds to generally be in the 15 to 25 mph range, except gusts up to 35 mph in the mountains on Saturday and possibly up to 40 mph on Sunday. The offshore flow is expected to bring a warming trend to most areas through the weekend, with warmest coastal/valley areas climbing to around 70 degrees on Saturday, then mid 70s by Sunday. The high clouds do add some uncertainty to the temperature forecast. Either way it will be at least 3-5 degrees above normal by Sunday, with the potential for as much as 10 degrees above normal if the opacity of the clouds is low enough to allow more of the sun's energy to pass through to the surface.

*** From previous discussion ***

Gradients turn onshore by Monday so while it looks like we'll still be mired in high clouds the return of onshore flow and lowering heights from the next trough will cool temps at least a few degrees.

LONG TERM (TUE-FRI). 17/150 PM.

Models obviously struggling with the pattern next week and the interaction of subtropical moisture with the eastern Pacific trough. The deterministic models have flipped with the GFS now more like the earlier ECMWF solutions which did entrain the moisture near Hawaii but then separated and moved south prior to landfall along the west coast. So now the EC is trending towards the previous GFS solutions and is supporting some light rain across the area late Monday and Tuesday. The end result being no change to the forecast as there are still enough solutions out there favoring some light precip during this time. So low pops look reasonable. None of the solutions have supported anything but very minimal rainfall so impacts are minimal to none either way.

It's looking dry Wed/Thu as some ridging develops again and the storm track shifts back to the north and east. It looks like this pattern will hold into next weekend before we possibly see our next chance of rain early the following week.

AVIATION. 17/2356Z.

At 2345Z at KLAX, a moist layer was 3800 feet deep with an inversion top of 7100 feet and 8 degrees Celsius.

SCT-BKN250 will be common through Saturday across the region. SCT- BKN035-050 will continue until sundown across portions of the LA basin as well as adjacent San Gabriel mountains and foothills. 70 percent chance LIFR FG at KPRB 10-17Z Saturday. Otherwise, high confidence in VFR conditions.

LAX . High confidence of VFR conditions through Saturday. No significant east wind concerns through 06Z Saturday. Northeast to east winds likely 10-20Z Saturday, with a 20 percent chance of exceeding 8 KT.

KBUR . SCT-BKN040 conditions expected until sundown. Otherwise moderate confidence of VFR conditions through Saturday.

MARINE. 17/757 PM.

There is a 20% chance of Small Craft Advisory (SCA) winds for the outer waters from the Central Coast to San Nicolas Island tonight, and a 20% chance of SCA NE winds from Ventura to Santa Monica on Sunday, otherwise SCA winds are not expected through at least Tuesday. There is then a 50% chance of SCA level wind gusts at times on Wednesday for much of the waters.

Seas could approach the SCA 10+ feet threshold on Sunday over the outer waters. High confidence of seas going over 10+ feet Monday through Wednesday as a large and long period west to northwest swell fills in the waters. This will likely result in large breaking waves near the coast, with potential breaking waves at the Morro Bay and Ventura Harbor entrances.

LOX WATCHES/WARNINGS/ADVISORIES. CA . NONE. PZ . NONE.

.HAZARD POTENTIAL OUTLOOK (MON-FRI).

No significant hazards expected.



PUBLIC . Gomberg/MW AVIATION . Gomberg MARINE . Kittell/Sirard SYNOPSIS . Phillips/Sirard

weather.gov/losangeles


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
PXAC1 9 mi77 min NNW 2.9 G 4.1
BAXC1 10 mi77 min N 7 G 8
OHBC1 - 9410660 - Los Angeles, CA 11 mi53 min 61°F1023.2 hPa
PSXC1 11 mi77 min NW 7 G 8.9
46221 - Santa Monica Bay, CA (028) 12 mi21 min 60°F4 ft
AGXC1 12 mi77 min NE 1.9 G 2.9
ICAC1 - 9410840 - Santa Monica Pier 12 mi53 min 55°F 60°F1022.9 hPa
PFDC1 12 mi77 min NNW 1 G 1
PFXC1 12 mi77 min N 5.1 G 6
PRJC1 14 mi77 min N 4.1 G 5.1
46256 15 mi47 min 59°F2 ft
46222 - San Pedro, CA (092) 17 mi24 min 60°F3 ft
46253 22 mi47 min 61°F3 ft
46025 - Santa Monica Basin - 33NM West Southwest of Santa Monica, CA 35 mi27 min NNW 12 G 16 57°F 60°F1023.2 hPa51°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 mi2 hrsW 510.00 miPartly Cloudy0°F0°F%1022.7 hPa
Hawthorne, Hawthorne Municipal Airport, CA6 mi54 minN 010.00 miFair55°F46°F72%1022.8 hPa
Los Angeles, Los Angeles International Airport, CA6 mi54 minWSW 410.00 miA Few Clouds57°F46°F69%1022.4 hPa
Long Beach, Long Beach Airport, CA13 mi54 minN 010.00 miFair53°F44°F72%1022.7 hPa
Los Angeles / USC Campus Downtown, CA13 mi55 minN 010.00 miFair54°F45°F72%1022.3 hPa
Santa Monica, Santa Monica Municipal Airport, CA13 mi56 minN 010.00 miFair51°F42°F71%1022.5 hPa
Los Alamitos Army Airfield, CA19 mi1.8 hrsN 010.00 miFair49°F39°F72%1023 hPa
Fullerton, Fullerton Municipal Airport, CA22 mi54 minN 010.00 miFair51°F43°F74%1022.4 hPa
Burbank - Bob Hope Airport, CA24 mi54 minNNW 510.00 miFair51°F41°F69%1021.7 hPa

Link to 5 minute data for KTOA

Wind History from TOA (wind in knots)
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Last 24hr--------------------CalmS3CalmNE4--CalmCalmW5W6W6W8W5W5W5
1 day ago--------------------W3CalmNE3Calm--SE9S56SW11SW7S8SW4--5
2 days ago--------------------CalmCalmCalmCalmW4W7W8W9W10W10W8W6--SW6

Tide / Current Tables for King Harbor, Santa Monica Bay, California
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Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.


Tide / Current Tables for Los Angeles Harbor, Mormon Island, California
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Los Angeles Harbor
Click for Map
Sat -- 01:02 AM PST     Moonrise
Sat -- 03:57 AM PST     5.17 feet High Tide
Sat -- 06:57 AM PST     Sunrise
Sat -- 11:03 AM PST     0.87 feet Low Tide
Sat -- 12:23 PM PST     Moonset
Sat -- 05:02 PM PST     3.13 feet High Tide
Sat -- 05:10 PM PST     Sunset
Sat -- 10:02 PM PST     1.73 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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2.83.64.455.24.94.33.42.51.71.10.911.422.633.132.72.21.91.71.9

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
Wind Forecast for Los Angeles/Oxnard, CA (0,6,7,8)
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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.