Sunday, March29, 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 6:42AMSunset 7:13PM Sunday March 29, 2020 11:18 AM PDT (18:18 UTC) Moonrise 9:55AMMoonset 12:00AM Illumination 31% 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- 916 Am Pdt Sun Mar 29 2020
.small craft advisory in effect from 3 pm pdt this afternoon through late tonight...
Today..NW winds 10 to 15 kt, becoming W 10 to 20 kt with gusts to 25 kt in the afternoon. Strongest western portion. Combined seas 3 to 5 ft dominant period 7 seconds.
Tonight..NW winds 15 to 25 kt with local gusts to 30 kt. Strongest western portion. Combined seas 4 to 6 ft dominant period 7 seconds.
Mon..W winds 10 to 15 kt. Wind waves 2 ft or less. W swell 3 to 4 ft at 7 seconds, subsiding to 2 ft at 7 seconds in the afternoon.
Mon night..W winds 10 to 15 kt, becoming N 5 to 10 kt after midnight. Wind waves 2 ft or less. W swell 2 to 3 ft at 7 seconds. Patchy fog after midnight.
Tue..N winds 5 to 10 kt, becoming W in the afternoon. Wind waves 2 ft or less. W swell 3 ft at 7 seconds. Patchy fog in the morning.
Tue 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 7 seconds. Patchy fog after midnight.
Wed..SW winds 5 to 10 kt. Wind waves 2 ft or less. W swell 2 to 4 ft. Patchy fog.
Thu..S winds 5 to 10 kt. Wind waves 2 ft or less. W swell 2 to 4 ft. Patchy fog.
PZZ600 916 Am Pdt Sun Mar 29 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 1024 mb surface high was located 900 nm W of point conception. A 1015 mb low was centered in arizona. A weak cold front will move across the waters today.


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 291640 AFDLOX

Area Forecast Discussion National Weather Service Los Angeles/Oxnard CA 940 AM PDT Sun Mar 29 2020

SYNOPSIS. 29/735 AM.

There is a slight chance of light showers today with any snow remaining above major pass levels. A significant warming trend begins on Monday with many locations reaching 80 degrees Tuesday and Wednesday and again next weekend.

SHORT TERM (TDY-TUE). 29/938 AM.

A weak trough is moving through California today. This one didn't have a lot of over-water trajectory so it's moisture starved and fairly disorganized. Still looks like a decent chance of some light showers across SLO County and in the mountains from SB-LA Counties but northwest flow will place most of our population in a rain shadow. Can't completely rule out a sprinkle in some of the foothill areas and Santa Clarita Valley but otherwise most areas away from the mountains and SLO County should stay dry.

***From Previous Discussion***

The upper trough passage will also usher in gusty west to northwest winds across portions of the forecast area this afternoon and overnight. The strongest winds will be focused across srn SBA county, the I-5 corridor in the LA county mountains, and the Antelope Valley, where gusts between 30 and 45 mph will be common. Wind advisories may be needed but it is more likely that the winds will be just under wind advisory criteria.

Dry northwest flow aloft moves into the area on Monday. Hgts 2will rise to 577 DM building heights across the district. This in combination with weak offshore flow from the north and east will bring a nice up tick in temps. Look for a 3 to 6 degree increase in max temps with the warmest areas reaching the mid 70s.

Northerly offshore flow will increase Monday night (The KBFL grad will reach -6 mb). This will likely lead to advisory level gusts across the SBA south coast and gusty but Sub advisory level gusts through the I-5 corridor. It looks like there will be just enough of an eddy to bring some morning stratus to the LA coast and San Gabriel Vly. There will be additional warming and almost all of the coasts and vlys will see highs in the 70s with the LA Vlys all in the upper 70s.

LONG TERM (WED-SAT). 29/315 AM.

Both the EC and GFS agree that the forecast they had ydy was wrong and have changed their tunes in lock step. Gone is the ridge and warmer temperatures.

Both now agree that there will be a humongous upper low over Montana/Idaho/Alberta. The lower hgts and cyclonic flow associated with this low will extend over SoCal.

While this cyclonic flow pattern will not bring rain to the area through Saturday it will keep the night through morning low cloud pattern going through at least Thursday.

Max temps will fall Wednesday (making Tuesday the warmest of the next 7) and then will not change much day to day through Saturday

At this time both mdls agrees that some extra energy will move into the state next Sunday and bring a chc of rain along with more clouds and cooler temps.

AVIATION. 29/1201Z.

At 11Z at KLAX, there was no marine inversion but there was a moist layer up to 3000 feet.

Mostly cloudy skies across SLO and SBA County and in the mtns thru this evening, with scattered showers. Conds will be mostly low VFR to occasionally high MVFR, except IFR to LIFR conds are expected in the mtns. Elsewhere, expect patchy to areas of low clouds across L.A. County coastal and valley locations this morning, with mostly MVFR conds. Expect mostly VFR conds tonight. KLAX . Low confidence in the 12Z TAF. There is a 40% chance of MVFR cigs between 13Z and 19z. There is a 30% chance of a 7 kt east wind component thru 17Z. There is a 30% chance of MVFR cigs between 09Z and 15Z tonight/Mon morning.

KBUR . Low confidence in the 12Z TAF. There is a 40% chance of MVFR cigs between 13Z and 19z. There is a 30% chance of MVFR cigs between 09Z and 12Z tonight/Mon morning.

MARINE. 29/938 AM.

Outer waters . Good confidence in forecast. Expect Small Craft Advisory (SCA) winds across the southern two zones (PZZ673/676) thru tonight. There is a 30% chance of SCA level winds across the northern outer waters zones this afternoon into tonight. SCA conds are likely across the entire outer waters Mon afternoon thru Thu. There is now a 50% chance of Gales Tue night-Wed night.

Inner waters N of Pt Sal. Moderate confidence in forecast. There is a 30% chance of SCA level winds this afternoon/evening. SCA conds are likely during the afternoon/evening hours Mon thru Wed, and there is a 50% chance of SCA conds Thu.

Inner waters S of Pt Conception . Moderate confidence in forecast. SCA conds are expected this afternoon thru late tonight. There is a 30% chance of SCA level winds during the afternoon/evening hours Mon and Tue across western portions of the SBA Channel, then SCA conds are likely across the SBA Channel Wed and Thu.

There will be an extended period of hazardous short period seas under 9 seconds for much of the week across most of the waters.

LOX WATCHES/WARNINGS/ADVISORIES. CA . NONE. PZ . Small Craft Advisory in effect from 3 PM this afternoon to 3 AM PDT Monday for zones 650-655. (See LAXMWWLOX). Small Craft Advisory in effect until 3 AM PDT Monday for zones 673-676. (See LAXMWWLOX).

.HAZARD POTENTIAL OUTLOOK (TUE-SAT).

No significant hazards expected.



PUBLIC . MW/Rorke AVIATION . DB MARINE . Sweet/DB SYNOPSIS . Kj

weather.gov/losangeles


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
PXAC1 9 mi97 min SSE 2.9 G 5.1
BAXC1 10 mi103 min ESE 7 G 8.9
OHBC1 - 9410660 - Los Angeles, CA 11 mi49 min 60°F1020.8 hPa
PSXC1 11 mi49 min SSW 6 G 8
46221 - Santa Monica Bay, CA (028) 12 mi53 min 58°F2 ft
AGXC1 12 mi103 min S 6 G 6
ICAC1 - 9410840 - Santa Monica Pier 12 mi49 min S 6 G 7 57°F 60°F1020.7 hPa
PFDC1 12 mi109 min SSE 4.1 G 5.1
PFXC1 12 mi49 min S 4.1 G 7
PRJC1 14 mi49 min SSE 5.1 G 6
46256 15 mi49 min 60°F3 ft
46222 - San Pedro, CA (092) 17 mi56 min 59°F3 ft
46253 22 mi49 min 60°F3 ft
46025 - Santa Monica Basin - 33NM West Southwest of Santa Monica, CA 35 mi39 min NW 5.8 G 7.8 57°F 59°F1020.8 hPa54°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 mi32 minW 410.00 miMostly Cloudy63°F53°F73%1020.3 hPa
Hawthorne, Hawthorne Municipal Airport, CA6 mi26 minSSE 310.00 miFair60°F45°F58%1020.1 hPa
Los Angeles, Los Angeles International Airport, CA6 mi26 minWSW 310.00 miPartly Cloudy63°F46°F56%1019.9 hPa
Long Beach, Long Beach Airport, CA13 mi26 minSSE 610.00 miFair60°F48°F65%1020.1 hPa
Los Angeles / USC Campus Downtown, CA13 mi27 minN 09.00 miA Few Clouds64°F46°F52%1019.6 hPa
Santa Monica, Santa Monica Municipal Airport, CA13 mi28 minW 310.00 miPartly Cloudy60°F46°F62%1020.1 hPa
Los Alamitos Army Airfield, CA19 mi81 minS 310.00 miPartly Cloudy59°F43°F57%1020.3 hPa
Fullerton, Fullerton Municipal Airport, CA22 mi26 minVar 510.00 miMostly Cloudy63°F46°F56%1019.7 hPa
Burbank - Bob Hope Airport, CA24 mi26 minN 010.00 miFair58°F43°F58%1019 hPa

Link to 5 minute data for KTOA

Wind History from TOA (wind in knots)
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Last 24hrSW4W8W11W11W11W13--------------------------CalmCalmCalm--W4
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W18W15W13--------------------W8NW8--NW8W8

Tide / Current Tables for El Segundo, Santa Monica Bay, California
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El Segundo
Click for Map
Sun -- 12:15 AM PDT     4.49 feet High Tide
Sun -- 06:44 AM PDT     Sunrise
Sun -- 07:29 AM PDT     0.74 feet Low Tide
Sun -- 09:54 AM PDT     Moonrise
Sun -- 01:46 PM PDT     2.75 feet High Tide
Sun -- 06:06 PM PDT     2.10 feet Low Tide
Sun -- 07:12 PM PDT     Sunset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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4.54.443.32.51.71.10.80.81.11.522.42.72.72.62.42.22.12.22.52.93.43.9

Tide / Current Tables for Los Angeles Harbor, Mormon Island, California
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Los Angeles Harbor
Click for Map
Sun -- 12:06 AM PDT     4.58 feet High Tide
Sun -- 06:43 AM PDT     Sunrise
Sun -- 07:18 AM PDT     0.77 feet Low Tide
Sun -- 09:53 AM PDT     Moonrise
Sun -- 01:37 PM PDT     2.77 feet High Tide
Sun -- 05:55 PM PDT     2.19 feet Low Tide
Sun -- 07:12 PM PDT     Sunset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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4.64.443.22.41.610.80.81.21.62.12.52.72.82.62.42.32.22.32.63.13.64.1

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 (14,3,4,5)
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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.