Monday, March30, 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 6:41AMSunset 7:14PM Monday March 30, 2020 12:07 PM PDT (19:07 UTC) Moonrise 10:36AMMoonset 12:16AM Illumination 42% Phase: Waxing Crescent; Moon at 7 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- 744 Am Pdt Mon Mar 30 2020
Today..Winds variable 10 kt or less, becoming W 10 to 15 kt in the afternoon. 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.
Tonight..W to nw winds 10 to 20 kt with local gusts to 20 kt, becoming nw 5 to 10 kt after midnight. Wind waves 2 to 4 ft, becoming 1 ft or less late. W swell 2 to 4 ft at 7 seconds.
Tue..NW winds 5 to 10 kt, becoming W 10 to 20 kt in the afternoon wind waves 1 to 3 ft. W swell 3 ft at 7 seconds.
Tue night..W winds 10 to 20 kt in the evening, becoming variable 10 kt or less. Wind waves 1 to 3 ft. W swell 2 to 4 ft at 7 seconds. Patchy fog after midnight.
Wed..Winds variable 10 kt or less, becoming W 10 to 15 kt in the afternoon. Wind waves 1 to 3 ft. W swell 2 to 3 ft at 7 seconds. Patchy fog.
Wed night..W winds 10 to 15 kt with local gusts to 20 kt. Wind waves 1 to 3 ft. W swell 2 to 4 ft at 7 seconds.
Thu..W winds 10 to 20 kt. Wind waves 1 to 3 ft. W swell 3 to 5 ft.
Fri..W winds 10 to 20 kt. Wind waves 1 to 3 ft. Mixed swell W 3 to 5 ft and S 2 ft.
PZZ600 744 Am Pdt Mon Mar 30 2020
Synopsis for the southern california coast and santa barbara channel including the channel islands national marine sanctuary and national park..At 12z, or 5 am pdt, a 1025 mb high was near Monterey. Northwest flow will increase across the coastal waters. Gale force winds possible Tuesday and Wednesday, especially across the outer waters.


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 301629 AFDLOX

Area Forecast Discussion National Weather Service Los Angeles/Oxnard CA 929 AM PDT Mon Mar 30 2020

SYNOPSIS. 30/904 AM.

Skies will be mostly clear for the next few days except for some low clouds developing across the coast on Wednesday morning. Max temps rise both Monday and Tuesday and will be near normal on Tuesday. It will then be cooler again starting Wednesday. Dry conditions will persist through at least Friday.

SHORT TERM (TDY-WED). 30/928 AM.

Very little change from earlier forecasts. Pretty widespread low clouds and fog across interior SLO County which are very slow to clear but elsewhere it's sunny and trending warmer. Main thing the next few days is the locally gusty north winds in SB County and I5 corridor that may reach advisory levels by tomorrow night. Expecting few if any changes to the forecast through Saturday at least.

***From Previous Discussion***

A weak eddy will likely bring a few low clouds to the LGB area Tuesday morning while offshore flow keeps the rest of the coasts and vlys clear. The same offshore flow will bring some low clouds to the Cuyama and Interior SLO Vly. Weaker offshore flow and a stronger eddy will bring more low clouds to southern LA county on Wednesday. Another round of night and morning clouds is likely for the Cuyama and Interior SLO Vly as well.

There will be about a mb of offshore flow from the east this morning. On Tuesday morning it will be neutral and then will turn onshore on Wed. There will be continuous offshore flow from the north and it will peak on Tuesday morning.

Hgts peak this afternoon at around 578 DM fall some Tuesday and then decrease some more to 568 DM on Wednesday. Max temps will jump significantly today (3 to 6 degrees csts/vlys and 5 to 10 degrees across the interior). The increased offshore northerly flow will be more than enough to counter the lowering hgts on Tuesday and temps will warm another 3 to 6 degrees making Tuesday the warmest day of the next 7. Max temps on Tuesday will be at or even a little above normal. On Wednesday lower hgts and less offshore flow will knock 2 to 5 degrees off of Tuesday readings.

The strong northwest flow pattern and sfc offshore flow will generate gusty north to northwest winds across southern SBA County, the I-5 corridor and portions of the Antelope Vly. Wind advisories are likely for the SBA south coast both tonight and Tuesday night. The I-5 corridor and NW corner of the Antelope Vly will very likely see advisory level gusts Tuesday evening and overnight.

LONG TERM (THU-SUN). 30/333 AM.

Both the EC and GFS agree that weather excitement levels will be quite low on Thu and Fri as dry NW flow with hgts near 567 DM will be over the area. Temps will are likely to rise to a degree each day. Offshore flow will continue but the wind speeds will be much reduced from Tuesday Night's Wednesday's values.

On Saturday the flow flattens out as a cold upper low plunges southward southward just off the coast it then pivots eastward and across Nrn CA. There will be a slight bump up in clouds and max temps will lower some but not too much as hgts fall.

Both mdls indicate broad troffing setting up over the state on Sunday. The mdls are beginning to go out of phase. The GFS is cooler than the slower EC. The clouds will be on the increase and max temps will drop esp if the cooler GFS comes to pass.

Monday looks interesting - The EC and most of its ensemble members bring a cold upper low and rain to the area. The GFS disagrees and has dry NW flow. It will be interesting to see how the two mdls and all of their myriad of ensemble members handle this forecast tomorrow when Monday becomes part of the official forecast.

AVIATION. 30/1610Z.

At 1600Z, there was no marine inversion at KLAX.

Overall, moderate to high confidence in 18Z TAF package. Generally CAVU conditions are anticipated through the TAF period. The only exception will be KPRB where there is a 70% chance of LIFR conditions 12Z-17Z. Additionally, there is a 20% chance of IFR conditions 11Z-17Z at KLGB.

KLAX . High confidence in 18Z TAF as CAVU conditions are anticipated. There is a 10% chance of IFR conditions 11Z-17Z. No significant easterly wind component is expected.

KBUR . High confidence in 18Z TAF as CAVU conditions are anticipated.

MARINE. 30/910 AM.

For the Outer Waters, moderate to high confidence in current forecast. High confidence in northwest winds increasing to Small Craft Advisory (SCA) levels this afternoon and remaining at SCA levels through Friday. From Tuesday afternoon through Wednesday night, there is and 60% chance of Gale force winds and a GALE WATCH remains in effect.

For the Inner Waters north of Point Sal, moderate to high confidence in current forecat. High confidence in SCA level northwest each afternoon and evening today through Friday. There is a 30% chance of Gale force winds on Wednesday.

For the Inner Waters south of Point Conception, moderate confidence in current forecast. Today through Wednesday night, there is a 60% chance of SCA level northwest winds across the western half of the Santa Barbara Channel. Otherwise, winds and seas are expected to remain below SCA levels. For Thursday and Friday, there is a 40-5% chance of SCA level winds across the western half of the southern Inner Waters.

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

LOX WATCHES/WARNINGS/ADVISORIES. CA . NONE. PZ . Small Craft Advisory in effect from 3 PM this afternoon to 9 PM PDT this evening for zone 645. (See LAXMWWLOX). Small Craft Advisory in effect from 3 PM this afternoon to 3 PM PDT Tuesday for zone 670. (See LAXMWWLOX). Gale Watch in effect from Tuesday afternoon through late Wednesday night for zones 670-673-676. (See LAXMWWLOX). Small Craft Advisory in effect until 3 PM PDT Tuesday for zones 673-676. (See LAXMWWLOX).

.HAZARD POTENTIAL OUTLOOK (WED-SUN).

No significant hazards expected.



PUBLIC . MW/Rorke AVIATION . RAT MARINE . RAT SYNOPSIS . Sweet

weather.gov/losangeles


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
PXAC1 9 mi110 min SSE 5.1 G 7
BAXC1 10 mi104 min ESE 6 G 7
OHBC1 - 9410660 - Los Angeles, CA 11 mi56 min 60°F1025.1 hPa
PSXC1 11 mi50 min S 6 G 7
46221 - Santa Monica Bay, CA (028) 12 mi42 min 59°F3 ft
AGXC1 12 mi104 min SE 4.1 G 4.1
ICAC1 - 9410840 - Santa Monica Pier 12 mi50 min SSW 6 G 6 59°F 60°F1024.7 hPa
PFDC1 12 mi104 min ESE 5.1 G 6
PFXC1 12 mi50 min SSE 7 G 8
PRJC1 14 mi50 min S 6 G 7
46256 15 mi38 min 60°F3 ft
46222 - San Pedro, CA (092) 17 mi45 min 59°F3 ft
46253 22 mi38 min 60°F3 ft
46025 - Santa Monica Basin - 33NM West Southwest of Santa Monica, CA 35 mi38 min E 1.9 G 3.9 58°F 59°F1025.2 hPa56°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 mi81 minN 010.00 miA Few Clouds63°F51°F68%1024.7 hPa
Hawthorne, Hawthorne Municipal Airport, CA6 mi75 minN 010.00 miFair63°F46°F56%1024.6 hPa
Los Angeles, Los Angeles International Airport, CA6 mi75 minE 310.00 miA Few Clouds66°F48°F52%1024.3 hPa
Long Beach, Long Beach Airport, CA13 mi75 minN 010.00 miFair64°F48°F58%1024.5 hPa
Los Angeles / USC Campus Downtown, CA13 mi76 minN 010.00 miFair68°F48°F49%1023.9 hPa
Santa Monica, Santa Monica Municipal Airport, CA13 mi77 minS 310.00 miFair62°F46°F58%1024.3 hPa
Los Alamitos Army Airfield, CA19 mi70 minS 47.00 miA Few Clouds65°F44°F47%1024.7 hPa
Fullerton, Fullerton Municipal Airport, CA22 mi75 minSSE 310.00 miFair65°F48°F56%1024.1 hPa
Burbank - Bob Hope Airport, CA24 mi75 minVar 310.00 miFair62°F41°F46%1023.2 hPa

Link to 5 minute data for KTOA

Wind History from TOA (wind in knots)
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Last 24hrW11SW11W15
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W18W20------------------------CalmCalmCalmCalmN4
1 day agoW8W11W11W11W13--------------------------CalmCalmCalm--W4NW6
2 days agoSW7
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--------------------S3CalmCalmCalmCalmSW4

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
Mon -- 12:15 AM PDT     Moonset
Mon -- 12:42 AM PDT     4.44 feet High Tide
Mon -- 06:42 AM PDT     Sunrise
Mon -- 08:32 AM PDT     0.86 feet Low Tide
Mon -- 10:35 AM PDT     Moonrise
Mon -- 03:51 PM PDT     2.51 feet High Tide
Mon -- 05:59 PM PDT     2.56 feet Low Tide
Mon -- 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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4.44.44.23.732.31.61.20.90.91.11.41.82.12.42.52.52.52.62.62.733.33.7

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 (15,3,4,5)
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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.