Saturday, July11, 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 5:50AMSunset 8:07PM Saturday July 11, 2020 1:10 PM PDT (20:10 UTC) Moonrise 12:00AMMoonset 12:01PM Illumination 62% Phase: Waning Gibbous; Moon at 21 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- 834 Am Pdt Sat Jul 11 2020
Today..Winds variable 10 kt or less, becoming W 10 to 15 kt in the afternoon. Wind waves 2 ft or less. S swell 2 ft at 11 seconds. Patchy dense fog, with vsby 1 nm or less.
Tonight..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 8 seconds and S 2 ft at 12 seconds. Patchy dense fog with vsby 1 nm or less after midnight.
Sun..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 8 seconds and S 3 ft at 11 seconds. Patchy dense fog with vsby 1 nm or less in the morning.
Sun night..SW winds 5 to 10 kt. Wind waves 2 ft or less. Mixed swell W 2 ft at 9 seconds and S 3 ft at 10 seconds. Patchy dense fog with vsby 1 nm or less after midnight.
Mon..Winds variable 10 kt or less, becoming sw 10 kt in the afternoon. Wind waves 2 ft or less. Mixed swell W 2 ft at 9 seconds and S 3 ft at 9 seconds. Patchy dense fog with vsby 1 nm or less in the morning.
Mon night..W winds 5 to 10 kt. Wind waves 2 ft or less. Mixed swell W 2 ft at 8 seconds and S 3 ft at 10 seconds. Patchy fog after midnight.
Tue..W winds 10 to 15 kt. Wind waves 2 ft or less. Mixed swell W 2 ft and S 2 ft. Patchy fog.
Wed..W winds 10 to 15 kt. Wind waves 2 ft or less. W swell 2 ft. Patchy fog.
PZZ600 834 Am Pdt Sat Jul 11 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 1025 mb high pressure was centered centered 600 nm west of san francisco, while a 1008 mb was centered over southern nevada and a 1008 mb thermal low was located over southern nevada. The high will strengthen some over the next few days. Dense fog with very low visibility will persist into early next week. Steep and hazardous seas will develop across the coastal waters through the coming week.


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 111754 AFDLOX

Area Forecast Discussion National Weather Service Los Angeles/Oxnard CA 1054 AM PDT Sat Jul 11 2020

Added Fire Section

SYNOPSIS. 11/808 AM.

Afternoon temperatures will be well above normal today and Sunday and then will slowly cool through the week. Night and morning low clouds and fog will remain along the coast through the weekend and then will become more widespread, pushing into interior valleys by midweek.

SHORT TERM (TDY-MON). 11/917 AM.

***UPDATE***

The dense fog along the Santa Barbara south coast and Ventura County coast is retreating to the beaches leaving clear skies behind. Some scattered clouds may appear this afternoon, mostly in LA County as there is some moisture brought into the area from the south at higher elevations. Plan on upgrading the excessive heat watch in Antelope Valley as overnight low temperatures should be high enough in addition to the afternoon highs. No other impactful changes from the previous forecast.

***From Previous Discussion***

A 700 foot marine layer capped by a strong (11 degree rise in 1300 ft) has brought low clouds and patchy dense fog to much of the immediate coast. There is enough offshore trends from both the north and east to allow total clearing at the beaches with a possible exception of a few beaches from OXR to SBA. Otherwise today will just be about the heat hgts will rise to 595 DaM as SoCal sits under west end of a 599 DaM upper high that sits over NM. These hgts and weakened onshore flow will combine with high sun angle to produce max temps 6 to 12 degrees above normal everywhere save for the beaches of the Central Coast. These hot temperatures combined with the above normal overnight lows will produce a hazardous temperature environment for much of the non coastal area. Please refer to the product LAXNPWLOX for the exact details.

There will likely be some low clouds and dense fog across the beaches tonight but it will not extend very far inland. Overnight lows will remain above normal esp in the 1000-1500 ft elevations which are right in the heart of the inversion. Lows in the this heat band may not dip below 75 degrees.

Not much change on Sunday. There may be a few more degrees of warming across the interior. But not as much as once thought and it looks less likely now that the excessive heat watch will be converted to a warning (heat advisories are not issued for the Antelope Vly). The heat advisories in effect for today will continue into the early evening. There will be a little uptick in 850-700 mb moisture which will result in some CU build up over the LA/VTA mtns. Convective parameters are not too impressive and do not think the CU will develop into anything more. The onshore push to the east is forecast to hit 8.4 mb (although this forecast is often overdone) This will produce breezy conditions in the mtns and Antelope Vly in the afternoon.

The increased onshore flow will bring a little better marine layer stratus coverage to the area Sunday night.

On Monday the upper high is pushed to the south and east by a trof moving through the PAC NW. Hgts will fall to 590 DaM. More importantly the onshore flow will increase both from the west and south. Both of these will combine to drop max temps 4 to 8 locally 10 degrees. The vlys will remain a few degrees above normal but the coasts will actually be right at normals. Strong W to E onshore flow will bring gusty afternoon winds to the mtns and Antelope Vly.

LONG TERM (TUE-FRI). 11/324 AM.

Both the EC and the GFS agree that broad and weak troffing will be over the area Tuesday through Friday. Both mdls further agree that there will be moderate to strong onshore flow through the period.

The night through morning marine layer stratus pattern will reestablish itself and given the fcst strength of the afternoon onshore push many beaches may struggle to clear. Hgts will remain high enough to keep the low clouds smooshed out of most of the vlys.

Max temps will fall a few more degrees on Tuesday and that will bring below normal max temps to almost all areas. Since the pattern is so static there will only be minor day to day changes in temps from Wed to Fri.

AVIATION. 11/1615Z.

At 17Z at KLAX . The marine layer was 600 feet deep. The top of the inversion was near 3000 feet with a temperature of 28 Celsius.

Moderate confidence in VFR conditions 18-02Z at all airports, although there is a chance for IFR cats hugging some beaches most of today and within 5 miles of KSBA KOXR KLAX. LIFR or VLIFR cats possible tonight, 80 percent chance at KLGB KLAX KSMO KOXR, 60 percent chance at KCMA KSBA KSMX, 20 percent chance of KSBP. High confidence in VFR everywhere else.

KLAX . Moderate confidence in VFR through 03Z, except for a 20 percent chance of a couple of hours of IFR CIGS 20-03Z. These CIGS will likely hug the coast this afternoon. CIGS likely to return tonight, with a window of forming 02-06Z. Low confidence on timing after that, could dissipate by 12Z or go in and out of the airport. LIFR cats most likely, with a 30 percent chance of VLIFR.

KBUR . High confidence in VFR cats through at least Sunday with seasonal winds.

MARINE. 11/912 AM.

High confidence in Small Craft Advisory (SCA) level NW winds spreading southward from the outer waters along the Central Coast to San Nicolas Island by tonight, then persisting through at least Sunday night and likely through Monday night. The chance for SCA winds over the Santa Barbara continues to lower, and the SCA for tomorrow may end up being cancelled. With the persistent winds, choppy short period seas will impact all waters into early next week. On Tuesday, there is a chance some SCA level winds may remain from Point Conception to San Nicolas Island. Otherwise, there will be steep and hazardous seas throughout the week.

Dense fog will remain a concern through at least Monday morning, with visibilities under 1 mile. There is a chance that the fog hugs some coastlines even through the afternoon hours.

FIRE WEATHER. 11/1053 AM.

A ridge of high pressure will strengthen over the area this weekend, resulting in widespread hot and dry conditions over all areas away from the beaches through Tuesday, with the hottest conditions today and Sunday. Widespread minimum humidities between 5 and 15 percent will continue across inland areas, with daytime highs between 95 and 105 degrees, except 105 to 108 degrees in the Antelope Valley. Mountain and foothill areas will also continue to see very poor humidity recoveries overnight, generally remaining in the teens and 20s.

Onshore winds will be typical this afternoon and evening across the interior, gusting between 20 and 35 mph, then strengthen on Sunday and Monday, when gusts between 25 and 40 mph can be expected, with isolated gusts as high as 45 mph. The strongest winds each day will be focused across the Highway 14 corridor into the Antelope Valley, especially in the foothills. The LAX-Daggett gradient is expected to remain weaker today, likely peaking at +4 to +4.5 mb, then strengthen to between +6 and + 7 mb by Sunday afternoon and Monday afternoon.

With fuel conditions continuing to lower, elevated to brief critical fire weather conditions will likely continue across inland areas through Tuesday. In addition, the hot and dry conditions combined with drying fuels will bring an increased threat of deeper vertical plume development with any fires that develop across theinterior this weekend, as mixing heights are forecasted to increase to 10000 to 16000 feet during the afternoon hours. Coastal areas will be oderated by the shallow marine layer and onshore wind influence.

LOX WATCHES/WARNINGS/ADVISORIES. CA . Heat Advisory in effect until 8 PM PDT Sunday for zones 37-38-44>46-51-53-54-88-547. (See LAXNPWLOX). Excessive Heat Warning in effect from 11 AM to 8 PM PDT Sunday for zone 59. (See LAXNPWLOX). PZ . Small Craft Advisory in effect from 3 PM Sunday to 3 AM PDT Monday for zone 650. (See LAXMWWLOX). Small Craft Advisory in effect until 3 AM PDT Monday for zone 670. (See LAXMWWLOX). Small Craft Advisory in effect from 3 PM this afternoon to 3 AM PDT Monday for zones 673-676. (See LAXMWWLOX).

.HAZARD POTENTIAL OUTLOOK (MON-FRI).

No significant hazards expected.



PUBLIC . Rorke AVIATION . Kittell MARINE . Kittell FIRE . Gomberg SYNOPSIS . jld

weather.gov/losangeles


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
PXAC1 9 mi107 min N 2.9 G 4.1
BAXC1 10 mi107 min SSE 4.1 G 7
OHBC1 - 9410660 - Los Angeles, CA 11 mi53 min 66°F1016.3 hPa
PSXC1 11 mi53 min SSE 7 G 8
46221 - Santa Monica Bay, CA (028) 12 mi48 min 71°F2 ft
AGXC1 12 mi107 min WSW 12 G 14
ICAC1 - 9410840 - Santa Monica Pier 12 mi53 min W 7 G 7 67°F 67°F1016.7 hPa
PFDC1 12 mi107 min S 5.1 G 7
PFXC1 12 mi53 min SW 9.9 G 11
PRJC1 14 mi53 min WSW 14 G 15
46256 15 mi45 min 67°F3 ft
46222 - San Pedro, CA (092) 17 mi51 min 70°F2 ft
46253 22 mi45 min 70°F3 ft
46025 - Santa Monica Basin - 33NM West Southwest of Santa Monica, CA 35 mi41 min WSW 7.8 G 9.7 66°F 71°F1016.2 hPa64°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 mi82 minW 1210.00 miClear77°F66°F69%1015.9 hPa
Hawthorne, Hawthorne Municipal Airport, CA6 mi78 minWSW 810.00 miFair80°F62°F54%1015.9 hPa
Los Angeles, Los Angeles International Airport, CA6 mi78 minWSW 1010.00 miPartly Cloudy75°F63°F66%1016 hPa
Long Beach, Long Beach Airport, CA13 mi78 minS 510.00 miFair85°F63°F48%1015.4 hPa
Los Angeles / USC Campus Downtown, CA13 mi79 minN 010.00 miFair88°F57°F36%1014.9 hPa
Santa Monica, Santa Monica Municipal Airport, CA13 mi80 minWSW 710.00 miFair74°F63°F69%1016.1 hPa
Los Alamitos Army Airfield, CA19 mi73 minSW 810.00 miA Few Clouds84°F62°F48%1015.9 hPa
Fullerton, Fullerton Municipal Airport, CA22 mi78 minWSW 710.00 miA Few Clouds92°F63°F38%1014.8 hPa
Burbank - Bob Hope Airport, CA24 mi78 minVar 510.00 miFair96°F39°F14%1014.5 hPa

Link to 5 minute data for KTOA

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Last 24hr--W16W15------------------------------W3CalmW10W11W12W11
1 day agoW12W12W17------------------------------CalmCalm--------
2 days ago6W14----------------------------------44W8W9W12

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 -- 01:38 AM PDT     4.05 feet High Tide
Sat -- 05:51 AM PDT     Sunrise
Sat -- 08:38 AM PDT     0.93 feet Low Tide
Sat -- 12:00 PM PDT     Moonset
Sat -- 03:49 PM PDT     4.18 feet High Tide
Sat -- 08:05 PM PDT     Sunset
Sat -- 09:44 PM PDT     2.60 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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3.8443.83.32.61.91.410.91.21.82.43.13.74.14.243.73.32.92.72.62.7

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
Wind Forecast for Los Angeles/Oxnard, CA (16,3,4,5)
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Ground Weather Radar Station Santa Ana Mtns, CA
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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.