Thursday, April2, 2020
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Marine Weather and Tides
Marina del Rey, 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 6:37AMSunset 7:16PM Thursday April 2, 2020 12:04 PM PDT (19:04 UTC) Moonrise 1:20PMMoonset 3:05AM Illumination 73% Phase: Waxing Gibbous; Moon at 10 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- 911 Am Pdt Thu Apr 2 2020
Today..NE winds 5 to 10 kt, becoming sw in the afternoon. Wind waves 2 ft or less. W swell 4 to 6 ft at 8 seconds. Patchy fog in the morning.
Tonight..W winds 10 to 15 kt, becoming E 5 to 10 kt after midnight. Wind waves 2 ft or less. W swell 3 to 5 ft at 7 seconds. Patchy fog after midnight.
Fri..E winds 5 to 10 kt, becoming W 10 to 15 kt in the afternoon. Wind waves 2 ft or less. W swell 3 to 5 ft at 8 seconds. Patchy fog in the morning.
Fri night..SW winds 10 to 15 kt. Wind waves 2 ft or less. W swell 3 to 5 ft at 8 seconds. Patchy fog after midnight.
Sat..E winds 10 to 15 kt, becoming sw 10 kt in the afternoon. Wind waves 2 ft or less. Mixed swell W 3 ft at 7 seconds and S 2 ft at 14 seconds. Patchy fog in the morning.
Sat night..W winds 10 to 15 kt. Wind waves 2 ft or less. W swell 3 to 4 ft at 8 seconds, subsiding to 2 ft at 7 seconds after midnight. S swell 2 ft.
Sun..SW winds 15 to 20 kt. Combined seas 2 to 4 ft. Chance of rain.
Mon..SW winds 10 to 15 kt. Wind waves 1 to 3 ft. Mixed swell W 3 ft and S 2 ft. Rain likely.
PZZ600 911 Am Pdt Thu Apr 2 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 1027 mb surface high was 450 nm west of seattle and a 1004 mb low was in az. This high pressure area will persist through most of the week and will keep persistent northwest flow and steep seas through Saturday.


7 Day Forecast for Marine Location Near Marina del Rey, CA
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location: 33.96, -118.45     debug


Area Discussion for - Los Angeles/Oxnard, CA
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FXUS66 KLOX 021809 AFDLOX

Area Forecast Discussion National Weather Service Los Angeles/Oxnard CA 1109 AM PDT Thu Apr 2 2020

SYNOPSIS. 02/853 AM.

Temperatures will be near normal Today and Friday. Areas of overnight to morning fog are expected for coastal Los Angeles and Ventura Counties through the rest of the week. By Sunday, a storm system will bring clouds, rain, and cooling. Rain will spread through the region from north to south Sunday and Monday.

SHORT TERM (TDY-SAT). 02/858 AM.

***UPDATE***

No impactful changes to the previous short-term forecast. The stratus has been clearing pretty quickly from inland areas per satellite imagery and should clear to near the coast by around 11 am.

***From Previous Discussion***

A decent eddy has spun up a 2000 ft marine layer and a resultant stratus deck which will, by dawn, cover most of the coasts and vlys of LA/VTA counties. Moderate onshore flow to the east has pushed enough moisture into the Santa Ynez vly to create a back building stratus deck there. Northerly flow from the San Joaquin Vly has brought some low clouds to the SLO/SBA/VTA/Kern junction. Moderate offshore grads from KSMX to KSBA and KBFL to KSBA has generated areas of gusty advisory level north winds across the SBA south coast. Otherwise the state sits under dry NW flow and except for the morning stratus skies will be sunny. The eddy and marine layer will bring 2 to 4 degrees of cooling to csts and vlys of VTA and LA counties. The interior will cool 6 to 12 degrees as cool air pours in from the north. The Central Coast will warm 2 to 4 degrees as yesterdays strong onshore flow relaxes.

There will be less marine layer tonight as offshore flow sets up as sfc high pressure develops over Srn NV. There will be enough of an eddy left over to bring some low clouds to the LA coast and San Gabriel Vly. The northerly offshore flow will be a little stronger and there will likely be low end advisory gusts not only across the SBA south coast but through the i-5 corridor as well.

Friday will be sunny save for the little bit of stratus. The offshore flow will not bring as much warming as it might because hgts will be falling as the southern end of a humongous low centered over Nrn Alberta moves through the state.

Hgts continue to fall and the upper flow turns more to a W to east direction as well as becoming a little more cyclonic Friday night. This along with onshore trends will gin up a good sized marine layer stratus deck which will cover much of the csts/vly of VTA county and perhaps the SBA south coast as well. Weak offshore flow from KBFL to KSMX will likely keep the clouds away from the Central Coast. Clouds will increase through the day as an upper low approaches from the NW. Max temps will cool 2 to 4 degrees and max temps will be 3 to 6 degrees blo normal. There is a slim chc that NW SLO county could see some light rain late in the afternoon.

LONG TERM (SUN-WED). 02/319 AM.

A cold upper low will bring a late season storm to the area starting on Sunday.

The GFS and the EC are still not in the best agreement but are much closer than they have been. The ensemble spreads have been narrowing as well so there is much better confidence in the forecast through Monday.

The 531 DM upper low will move to a position 80 miles west of the OR/CA state line late Saturday night. Moist westerly flow will move over the Central Coast and there is a chc that light rain will develop over SLO county after midnight.

The low will not move too much on Sunday but the moist cyclonic flow will overspread all of SoCal. Hgts fall to 556 DM. An abundance of mid level cloudy will make it a cloudy day. Max temp will be in the 60s across all non mountain areas. Light rain will likely fall over SLO and SBA counties esp in the afternoon. There is a chc VTA county will see some rain in the afternoon but only a slight chc for LA county.

Things get interesting Sunday night and Monday. The EC and the GFS begin to disagree with the EC moving the upper low slower than the GFS. But both mdls predict that the upper low will move southward down the coast. It will move a good amount of PVA, decent sub tropical jet dynamics over the area in its strengthening SW flow. Most importantly it will entrain a small plume of moisture from the Pacific. Rain will almost certainly spread over the entire area Sunday night. The period of most intense rain will be between Midnight and Noon Monday. During this time there will be good southerly low level flow which will greatly enhance the rainfall rates and totals over the south facing slopes from Santa Ynez range to the San Gabriels. The operational GFS is about 6 hours faster than the EC but the GFS ensemble mean is slower more like the EC so think the slower solution is the one to go with which mean there will be more rainfall. The heavier rain will move out of SLO and Nrn SBA counties early in the afternoon (maybe late morning) and then will end over LA county late in the afternoon. There will be plenty of showers continuing overnight as the upper low will either be over SBA county (GFS) or west of SLO county (EC)

Higher rainfall amounts seem like a good idea now. The flatter areas of the coasts and vlys should get about an inch of rain plus or minus a few tenths. The south facing slopes from SBA to LA county should receive 2 to 3 inches of rain. The interior will likely see a half to three quarters of an inch.

There will be snow with this system and snow levels will be low for April but do not expect snow on the major passes. Snow levels are expected to start out at 6000' and then lower to about 4500 ft by Monday. This storm will likely bring quite a bit of snow to elevations above 6000 feet and a Winter Storm watch will likely be issued in the near future.

Lower confidence in the Tue/Wed forecast as the GFS and EC are at odds with each other (although in better agreement than they were last night) Both forecast that the upper low will hang around SW corner of the country. The EC soln is more over CA and brings more showers to SoCal. If the cold core of the low is more overhead it will generate a risk of TSTMs. For now kept the forecast pretty general with cloudy conditions and a chc of showers.

Max temps will be 10 to 20 degrees blo normal through the period.

AVIATION. 02/1808Z.

At 1523Z at KLAX, the marine layer was 4300 feet deep. The top of the inversion was around 5400 feet with a temperature of 9 C.

Moderate confidence in TAFs south of Point Conception and high confidence in TAFs northward/desert sites. For all sites currently with MVFR/VFR cigs, clearing may occur an hour or more later than forecast.

KLAX . Moderate confidence in TAF. Clearing of cigs may occur as late as 21Z. There is a 30 percent chance of an east wind component of 8 kt after 12Z.

KBUR . Moderate confidence in TAF. Clearing of cigs may occur as late as 22Z.

MARINE. 02/916 AM.

High confidence in the current forecast. Strong northwest flow will persist through the remainder of the week, keeping at least Small Craft Advisory (SCA) level conditions over the outer waters from the Central Coast to San Nicolas Island through Saturday. These winds will generate a short period steep swell over ALL coastal waters through Saturday. Gale force gusts are likely to continue over the southern portion from Point Conception to San Nicolas Island through this morning. There is a 50% chance of gale force gusts this afternoon and evening and again on Friday, especially for the southern portion. The gusty northwest flow will also likely bring SCA level conditions to the western portion of the Santa Barbara Channel for the afternoon and evening hours today and Friday. After Saturday, conditions will likely remain below SCA level everywhere.

SE winds will also impact the San Pedro Channel each morning through Saturday, and could locally approach 15 kt at times. A storm system is expected early next week bringing a chance of rain over all of the coastal waters.

LOX WATCHES/WARNINGS/ADVISORIES. CA . NONE. PZ . Small Craft Advisory in effect until 3 AM PDT Friday for zone 645. (See LAXMWWLOX). Small Craft Advisory in effect from 3 PM this afternoon to 3 AM PDT Friday for zone 650. (See LAXMWWLOX). Small Craft Advisory in effect until 3 PM PDT Saturday for zone 670. (See LAXMWWLOX).

.HAZARD POTENTIAL OUTLOOK (SAT-WED).

Rain, possibly heavy at times, and mountain snow are expected Sunday through Monday and possibly through mid week causing road hazards.



PUBLIC . Rorke/jld AVIATION . Sweet/Stewart MARINE . Sweet/Stewart SYNOPSIS . jld

weather.gov/losangeles


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
ICAC1 - 9410840 - Santa Monica Pier 4 mi257 min ESE 2.9 G 5.1 61°F 61°F1014.1 hPa
46221 - Santa Monica Bay, CA (028) 12 mi249 min 59°F4 ft
BAXC1 17 mi311 min E 5.1 G 5.1
PXAC1 17 mi311 min ESE 2.9 G 5.1
PSXC1 18 mi257 min SE 2.9 G 4.1
OHBC1 - 9410660 - Los Angeles, CA 19 mi263 min 61°F1014 hPa
PFDC1 19 mi311 min ENE 1.9 G 2.9
PFXC1 19 mi257 min SSE 1 G 1.9
AGXC1 20 mi311 min SSW 1 G 1
PRJC1 21 mi257 min Calm G 1
46256 22 mi245 min 60°F5 ft
46222 - San Pedro, CA (092) 25 mi252 min 59°F4 ft
46253 30 mi247 min 59°F5 ft
46025 - Santa Monica Basin - 33NM West Southwest of Santa Monica, CA 35 mi235 min NNW 7.8 G 9.7 57°F 60°F1014.2 hPa55°F

Wind History for Santa Monica, CA
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Los Angeles, Los Angeles International Airport, CA3 mi72 minSW 1010.00 miMostly Cloudy65°F53°F66%1014.8 hPa
Santa Monica, Santa Monica Municipal Airport, CA5 mi74 minN 010.00 miPartly Cloudy63°F48°F60%1014.8 hPa
Hawthorne, Hawthorne Municipal Airport, CA6 mi72 minSSW 710.00 miPartly Cloudy67°F48°F51%1014.8 hPa
Los Angeles / USC Campus Downtown, CA10 mi73 minN 010.00 miPartly Cloudy68°F50°F53%1014.4 hPa
Torrance, Zamperini Field Airport, CA13 mi78 minE 6 G 1410.00 miMostly Cloudy63°F55°F77%1015.2 hPa
Burbank - Bob Hope Airport, CA17 mi72 minVar 310.00 miFair64°F36°F35%1013.6 hPa
Van Nuys, Van Nuys Airport, CA17 mi74 minN 910.00 miPartly Cloudy66°F32°F28%1014 hPa
Long Beach, Long Beach Airport, CA18 mi72 minS 810.00 miMostly Cloudy62°F52°F70%1015 hPa
Los Angeles, Whiteman Airport, CA21 mi70 minN 010.00 miClear63°F32°F32%1015.6 hPa
El Monte, CA24 mi2.2 hrsN 010.00 miMostly Cloudy63°F50°F64%1014.9 hPa
Los Alamitos Army Airfield, CA24 mi2.1 hrsWSW 47.00 miMostly Cloudy62°F50°F65%1015.2 hPa

Link to 5 minute data for KLAX

Wind History from LAX (wind in knots)
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Last 24hrW11SW13SW11W10W10W8SW7W5CalmCalmSE4SE6E8E10E10E5E4E5E3CalmE4CalmSW10S9
1 day agoW10W10W12W10W11W7SW9SW5W5W4SW5SW4CalmE3CalmE3SE5E5E4E5E543W10
2 days agoW11W11W12W14W14SW13W12W9W5SW5SW4CalmE3E4CalmCalmCalmCalmW3N5NE33NE3W10

Tide / Current Tables for Santa Monica, California
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Santa Monica
Click for Map
Thu -- 03:05 AM PDT     Moonset
Thu -- 04:43 AM PDT     4.50 feet High Tide
Thu -- 06:39 AM PDT     Sunrise
Thu -- 12:33 PM PDT     -0.05 feet Low Tide
Thu -- 01:19 PM PDT     Moonrise
Thu -- 07:16 PM PDT     Sunset
Thu -- 07:38 PM PDT     3.59 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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3.13.43.84.24.44.54.33.72.921.10.40-00.311.82.63.23.53.63.432.7

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.


Weather Map
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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.