Thursday, April2, 2020
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Marine Weather and Tides
Rolling Hills Estates, 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 6:36AMSunset 7:16PM Thursday April 2, 2020 6:56 PM PDT (01:56 UTC) Moonrise 1:19PMMoonset 3:04AM Illumination 75% 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- 222 Pm Pdt Thu Apr 2 2020
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 1 to 3 ft. 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 1 to 3 ft. W swell 3 to 4 ft at 8 seconds, subsiding to 2 ft at 7 seconds after midnight. S swell 2 ft.
Sun..W winds 10 to 15 kt. Wind waves 1 to 3 ft. S swell 2 ft at 13 seconds. Slight chance of rain in the afternoon.
Sun night..SW winds 10 to 15 kt. Wind waves 1 to 3 ft. Mixed swell W 2 to 3 ft at 8 seconds and S 2 ft at 12 seconds. Chance of rain in the evening. Slight chance of tstms. Rain likely.
Mon..SW winds 10 to 15 kt. Wind waves 1 to 3 ft. Mixed swell W 3 ft and S 2 ft. Rain likely.
Tue..W winds 5 to 10 kt. Wind waves 2 ft or less. Mixed swell W 3 to 4 ft and S 3 ft. Chance of showers.
PZZ600 222 Pm 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 21z, or 2 pm pdt, a 1023 mb surface high was 700 nm southwest of point conception and a 1004 mb low was near las vegas. 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 Rolling Hills Estates, CA
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location: 33.72, -118.27     debug


Area Discussion for - Los Angeles/Oxnard, CA
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FXUS66 KLOX 030141 AAA AFDLOX

Area Forecast Discussion . UPDATED National Weather Service Los Angeles/Oxnard CA 641 PM PDT Thu Apr 2 2020

SYNOPSIS. 02/336 PM.

Temperatures will remain near normal through Friday. Overnight to morning areas of fog are expected for coastal LA County tonight, with low clouds spreading well inland for areas south of Point Conception Friday night into early Saturday. By Sunday, a storm system will bring rain and cooler temperatures to the area. Rain will spread over the region from north to south Sunday and Monday.

SHORT TERM (TDY-SUN). 02/150 PM.

Synoptically, the area is under dry northwesterly flow with 500-mb heights around 570DM near the base of a trough. Another night of low stratus and fog is expected in Los Angeles County, but with less inland extent than this morning. Flow will become more zonal by Saturday evening as a low pressure system drops southwards from the Gulf of Alaska. By Sunday this 530DM feature will be off the CA-OR border and bringing clouds and then rain into the whole CWA.

Downtown LA made it to 70 which is only a degree below seasonal normal, but that will probably be the highest this week. There will be less marine layer tonight as offshore flow sets up with surface higher pressure developing over southern Nevada. 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 likely bring isolated low-end advisory gusts across the western Santa Barbara County south coast and the I-5 corridor.

Friday will be mostly sunny after a little bit of morning stratus. Heights will begin to fall Friday night along with increasing onshore trends will bring back the marine layer stratus deck that will cover much of the Ventura and south Santa Barbara coasts and valleys. Forecast weak offshore flow from KBFL to KSMX will likely keep the clouds away from the Central Coast.

Skies will become increasingly cloudy Saturday with mid and higher level clouds through the day as the upper low approaches from the NW. Afternoon temperatures will cool 2 to 4 degrees and fall below seasonal normal. The 530 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 chance that light rain will develop over SLO county after midnight.

Model solutions move the low slowly on Sunday but the moist cyclonic flow will overspread all of SoCal. Heights will fall to 556 DM and it will be a cloudy day. Afternoon temperatures will be in the 60s across all non-mountain areas. Light rain will likely fall over SLO and SBA counties. There is a chance Ventura and LA Counties will see some rain in the afternoon as well.

LONG TERM (MON-THU). 02/150 PM.

Things get interesting with the storm Sunday night and Monday. The low will bring PVA, sub-tropical jet dynamics, and strengthening southwesterly flow. The system also looks to 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 Sunday 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 heavier rain will move out of SLO and northern SBA counties by early in the afternoon and will end over LA county late in the afternoon. Showers will continue overnight as the upper low will remain near the area.

Still thinking the areas of the coasts and valleys not producing orographic lift 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 still not expecting 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.

Tuesday through Thursday evening looks to bring isolated showers and possible afternoon thunderstorms in the colder airmass. Afternoon temperatures will be likely be 10 to 20 degrees below normal through the extended period under cloudy skies.

AVIATION. 03/0138Z.

At 01Z at KLAX, there was deep moist layer up to around 5000 feet.

Moderate-to-high confidence in the current forecast. There is a slight chance to chance of IFR to MVFR conditions between 08Z and 16Z, highest for Los Angeles County coastal terminals.

KLAX . There is a 50 percent chance of IFR to MVFR conditions between 11Z and 16Z, otherwise VFR conditions are expected through the period. Any east winds will remain less than 7 knots.

KBUR . There is a 20 percent chance of IFR conditions between 13Z and 15Z, otherwise VFR conditions are expected through the period.

MARINE. 02/151 PM.

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 zones 645-650. (See LAXMWWLOX). Small Craft Advisory in effect until 3 PM PDT Saturday for zone 670. (See LAXMWWLOX). Small Craft Advisory in effect until 3 AM PDT Saturday for zones 673-676. (See LAXMWWLOX).

.HAZARD POTENTIAL OUTLOOK (SUN-THU).

Rain, possibly heavy at times, and mountain snow above 4500 feet are expected Sunday through Monday with a chance of showers lingering through the week - potentially causing road hazards.



PUBLIC . jld AVIATION . Hall MARINE . Sweet SYNOPSIS . Smith

weather.gov/losangeles


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
OHBC1 - 9410660 - Los Angeles, CA 0 mi57 min 61°F1014.7 hPa (-0.5)
AGXC1 1 mi105 min WSW 9.9 G 11
PFDC1 2 mi105 min W 7 G 8
PFXC1 3 mi57 min NW 12 G 13
PXAC1 3 mi105 min WNW 8.9 G 11
46256 4 mi27 min 61°F4 ft
BAXC1 4 mi105 min SSW 12 G 13
PSXC1 4 mi57 min W 8.9 G 12
PRJC1 5 mi57 min WSW 8.9 G 9.9
46222 - San Pedro, CA (092) 7 mi34 min 61°F4 ft
46253 11 mi59 min 61°F4 ft
46221 - Santa Monica Bay, CA (028) 21 mi31 min 60°F3 ft
ICAC1 - 9410840 - Santa Monica Pier 23 mi57 min W 11 G 14 60°F 63°F1014.6 hPa (-0.6)
46025 - Santa Monica Basin - 33NM West Southwest of Santa Monica, CA 42 mi37 min WNW 12 G 14 60°F 61°F1014.7 hPa56°F

Wind History for Angels Gate, CA
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Torrance, Zamperini Field Airport, CA6 mi3.1 hrsW 1110.00 miA Few Clouds63°F57°F83%1014.6 hPa
Long Beach, Long Beach Airport, CA10 mi3.1 hrsSSW 710.00 miFair65°F48°F54%1014.2 hPa
Los Alamitos Army Airfield, CA13 mi4 hrsSSW 910.00 miPartly Cloudy67°F48°F52%1014.5 hPa
Hawthorne, Hawthorne Municipal Airport, CA15 mi3.1 hrsW 10 G 1610.00 miFair66°F51°F59%1014.3 hPa
Los Angeles, Los Angeles International Airport, CA17 mi3.1 hrsW 1410.00 miA Few Clouds66°F51°F59%1014.3 hPa
Fullerton, Fullerton Municipal Airport, CA19 mi3.1 hrsSW 810.00 miMostly Cloudy69°F51°F53%1013.5 hPa
John Wayne-Orange County Airport, CA21 mi3.1 hrsSSW 1210.00 miPartly Cloudy70°F51°F51%1013.9 hPa
Los Angeles / USC Campus Downtown, CA21 mi3.1 hrsno data10.00 miPartly Cloudy69°F51°F53%1013.8 hPa

Link to 5 minute data for KTOA

Wind History from TOA (wind in knots)
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Last 24hrW14W10W8W8--------------------SE4CalmCalmSE9
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1 day agoW10W8W8W8--------------------W2001E6--E7E9E8E9E9CalmW11
2 days agoW9W10W7SW7--------------------SW3S7CalmCalmCalmCalmW8W11W11W11

Tide / Current Tables for Los Angeles, California
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Los Angeles
Click for Map
Thu -- 03:03 AM PDT     Moonset
Thu -- 04:44 AM PDT     4.46 feet High Tide
Thu -- 06:38 AM PDT     Sunrise
Thu -- 12:28 PM PDT     -0.06 feet Low Tide
Thu -- 01:19 PM PDT     Moonrise
Thu -- 07:14 PM PDT     Sunset
Thu -- 07:31 PM PDT     3.66 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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3.13.33.74.14.44.54.23.72.921.10.4-0-00.41.11.92.73.33.63.63.432.7

Tide / Current Tables for Los Patos (highway bridge), California
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Los Patos (highway bridge)
Click for Map
Thu -- 03:02 AM PDT     Moonset
Thu -- 05:44 AM PDT     3.70 feet High Tide
Thu -- 06:37 AM PDT     Sunrise
Thu -- 01:18 PM PDT     Moonrise
Thu -- 01:40 PM PDT     -0.04 feet Low Tide
Thu -- 07:14 PM PDT     Sunset
Thu -- 08:31 PM PDT     3.04 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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1.81.92.22.73.23.63.73.53.12.51.710.40-00.30.81.52.22.7332.72.2

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 (21,6,7,8)
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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.