Friday, December13, 2019
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Marine Weather and Tides
South Pasadena, CA

Version 3.4
NOTICE
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.
6/2/2019. Many thanks to a user for reporting an error on one of the Edit pages. The switch to PHP 7.2 caused many pages that previously worked to quit working. I fixed many but I still depend on users to report ones I missed. Please report errors HERE or send an email to me at L-36.com. Allen

Sunrise 6:48AMSunset 4:45PM Friday December 13, 2019 5:48 PM PST (01:48 UTC) Moonrise 7:23PMMoonset 9:13AM Illumination 95% Phase: Waning Gibbous; Moon at 17 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- 223 Pm Pst Fri Dec 13 2019
.small craft advisory in effect from late tonight through Saturday morning...
.gale warning in effect from Saturday afternoon through late Saturday night...
Tonight..Western portion, W winds 5 to 10 kt becoming nw 15 to 20 kt after midnight. Elsewhere, sw winds 5 to 10 kt becoming ne after midnight. Combined seas 3 to 5 ft dominant period 17 seconds, building to 5 to 7 ft dominant period 17 seconds after midnight.
Sat..Western portion, nw winds 20 to 25 kt becoming 25 to 35 kt in the afternoon. Elsewhere, winds variable 10 kt or less becoming W 10 to 20 kt in the afternoon. Combined seas 6 to 8 ft dominant period 16 seconds.
Sat night..Western portion, nw winds 30 to 35 kt becoming 25 to 30 kt after midnight. Elsewhere, nw winds 10 to 20 kt becoming N 5 to 15 kt after midnight. Combined seas 7 to 10 ft dominant period 12 seconds.
Sun..Western portion, nw winds 25 to 30 kt becoming 10 to 15 kt in the afternoon. Elsewhere, N winds 15 to 20 kt becoming 10 to 15 kt in the afternoon. Combined seas 7 to 9 ft dominant period 9 seconds, subsiding to 4 to 5 ft dominant period 10 seconds in the afternoon.
Sun night..NE winds 5 to 10 kt, becoming 10 to 20 kt after midnight. Wind waves 2 to 3 ft. W swell 4 to 6 ft at 8 seconds.
Mon..NE winds 10 to 20 kt. Wind waves 2 to 3 ft. W swell 3 to 4 ft at 13 seconds.
Mon night..From point mugu to santa Monica and S of palos verdes, ne winds around 10 kt becoming 20 to 25 kt after midnight. Elsewhere, ne winds 5 to 10 kt. Wind waves 2 to 3 ft. W swell 2 to 3 ft.
Tue..NE winds 15 to 20 kt. Combined seas 2 to 4 ft.
Wed..E winds 10 to 15 kt. Wind waves 2 ft or less. W swell 3 to 5 ft. Slight chance of rain.
PZZ600 223 Pm Pst Fri Dec 13 2019
Synopsis for the southern california coast and santa barbara channel including the channel islands national marine sanctuary and national park..At 20z or noon pst, a 1028 mb high was 600 nm sw of point conception, and a 1018 mb low was 150 nm sw of medford with a cold front extending sw of the low. In addition, a strong 981 mb low was located in the gulf of alaska. This strong low pressure system will continue to bring high seas to the local coastal waters through Sunday.


7 Day Forecast for Marine Location Near South Pasadena, CA
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location: 34.14, -118.2     debug


Area Discussion for - Los Angeles/Oxnard, CA
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FXUS66 KLOX 132313 AFDLOX

Area Forecast Discussion National Weather Service Los Angeles/Oxnard CA 313 PM PST Fri Dec 13 2019

SYNOPSIS. 13/1233 PM.

This afternoon will be warm before an approaching low pressure system will bring cooler, breezy weather to the region. There will also be a chance of light rain tonight mainly north of Point Arguello. This chance moves to the mountain areas Saturday morning, with snow developing later. Dry and warmer weather is expected Monday and Tuesday.

SHORT TERM (TDY-MON). 13/211 PM.

Interesting day along the coast today where a shallow marine layer pushed onshore and lingered for much of the day near Lompoc, the Oxnard coastal plain, and parts of the LA coast. Even parts of the southern Salinas Valley stayed cloudy. The strong onshore trends were a big reason for this and temperatures definitely trended cooler for coastal areas and some of the valleys too.

A weak cold front is approaching from the north and this will further increase onshore flow and cause the marine layer to rapidly deepen later tonight into Saturday, mainly across LA/Ventura Counties. In fact, there's a good chance we'll see some drizzle or even light showers, especially along the foothills of the eastern San Gabriels. Increasing west to northwest flow will help clear skies out along the Central Coast south through Ventura County by afternoon but clouds will likely linger in LA County much of the day. Several degrees of cooling all areas Saturday as a result with highs just in the low to mid 60s for coast/valleys. Slightly warmer across srn SB County due to downslope flow there.

It will be a breezy afternoon in many areas with marginal advisory level winds. Even stronger winds expected Sat night into Sunday morning, especially srn SB County with sundowners and in the I5 corridor and Antelope Valley. Some of those winds will filter down into the coast and valleys of LA/Ventura Counties as well but probably below advisory levels.

Moist, upslope flow near the Grapevine late Saturday into Sunday morning will likely generate some showers there with the snow level lowering to 3500-4000'. Good chance we'll see some light snow at pass level and possibly even an inch or two of accumulation. May need to consider a winter weather advisory due to snow and gusty winds and the impacts to major highways like Interstate 5.

Breezy north winds expected to continue in many areas Sunday but strongest in the mountains. Otherwise mostly sunny in most areas with temps still a few degrees below normal.

By Monday we shift to a moderate Santa Ana wind event. The NAM checked in with a LAX-DAG gradient close to -6mb with better upper support than would be expected given the upper level pattern. The ECMWF has been pretty consistent showing near advisory level northeast winds across the usual favored parts of LA/Ventura Counties Monday and the NAM would certainly agree. With the ridge building in from the west we can expect at least a few degrees of warming Monday with the warmest temps along the LA/Ventura coast.

LONG TERM (TUE-FRI). 13/206 PM.

One more day of Santa Anas/offshore flow Tuesday. The EC has been consistent showing the strongest gradients Tuesday morning but would have to think that upper support would be weaker with the ridge right overhead. EC ensembles have been favoring Tuesday as the strongest day for Santa Ana winds but would not be surprised if that's reversed or at the very least similar. Either way probably a second day of low end advisory level winds in LA/Ventura Counties with similar or slightly warmer temps.

Forecast confidence drops quite a bit for mid week as models have not been in good agreement on the pattern evolution and timing of the next trough. GFS and EC are in better agreement today on the pattern but the GFS is finding a much deeper source of moisture than the EC is. So still a chance of rain Wed into Thu with best odds across SLO/SB Counties. Rainfall amounts probably under a half inch either way, and possibly much less.

Good confidence in dry and slightly warmer weather the last part of Thursday and Friday with an upper ridge returning.

AVIATION. 13/2313Z.

At 2245Z, the marine inversion at KLAX was based at 1400 feet. The top of the inversion was 3600 feet with a temperature of 18 degrees Celsius.

Overall, moderate confidence in 00Z TAF package. High confidence in CIG/VSBY restrictions at all coastal/valley sites, but low confidence in flight categories and timing of flight category changes. Most sites will have CIGs start out at IFR/LIFR levels, but will increase to MVFR levels overnight and into Saturday morning.

KLAX . Overall, moderate confidence in 00Z TAF. Timing of change from IFR to MVFR conditions could be +/- 3 hours of current 09Z forecast. Timing of dissipation of MVFR CIGs could be +/- 2 hours of current 22Z forecast. No significant easterly wind component is expected.

KBUR . Overall, moderate confidence in 00Z TAF. Timing of arrival of MVFR CIGs could be +/- 3 hours of current 10Z forecast with a 30% chance of CIGs starting at IFR levels. Timing of dissipation of MVFR CIGs could be +/- 2 hours of current 22Z forecast.

MARINE. 13/1159 AM.

For the Outer Waters, moderate to high confidence in current forecast. Small Craft Advisory (SCA) level winds and/or seas will continue through at least late Sun night. The GALE WARNING is in effect for Sat afternoon and Sat night for PZZ676. With the gusty winds, short-period, choppy seas will be likely. High seas over 10 feet will continue through late Sun night, therefore a SMALL CRAFT ADVISORY is not only in effect for winds, but for hazardous seas. There is a 30% chance that GALE force winds could occur across the southern portion of zone PZZ673 for areas S of Point Conception during the same time as the Gale Warning in the southern zone.

For the Inner Waters north of Point Sal, moderate to high confidence in current forecast. There is a 60%-70% chance of SCA level winds Sat afternoon thru Sat night. With the gusty winds, short-period, choppy seas will be likely. High seas over 10 feet will continue into Sat night as well. As a result, Small Craft Advisory conditions for hazardous seas which, along with the gusty winds, will remain in effect through late Sat night.

For the Inner Waters south of Point Conception, moderate to high confidence in current forecast. There is a 60% chance of SCA level winds across the western half of the Santa Barbara Channel starting late tonight then spread across much of the channel with northwest to west winds. Also, a few hours later, there is a 60% chance for SCA level winds for the western portion of PZZ655. The SCA level winds will continue through noon Saturday, when a GALE WARNING will go into effect for the entire inner waters for gusts to 35 knots. This will continue through late Saturday night. The winds will shift to the northeast on Mon then to the east on Tue, with a 30%-40% chance of SCA level winds at times.

A large and long period west to northwest swell will impact the coastal waters through at least late Sun night, resulting in hazardous sea conditions and large breaking waves near shore, especially with a large short period wind swell on top of that. Breaking waves at the Morro Bay and Ventura Harbor entrances will be possible.

BEACHES. 13/1159 AM.

A large long-period west to northwest swell will continue across the coastal waters of southwest California, peaking through Saturday morning, then slowly diminish over the remainder of the weekend.

Surf will likely peak between 12 and 16 feet for the Central Coast. A HIGH SURF ADVISORY is in effect for the Central Coast through Monday morning.

A HIGH SURF ADVISORY is also in effect through noon Sunday for the beaches south of Point Conception with surf between 6 and 10 feet possible. Highest surf will occur across exposed west facing beaches. Strong rip currents and dangerous breaking waves are expected.

With high tides around 6.5 feet Saturday, minor coastal flooding is possible during the late morning high tide. Any coastal flooding impacts should be confined to the beaches, with flooding possible in the most vulnerable parking lots, bike paths, and walkways.

LOX WATCHES/WARNINGS/ADVISORIES. CA . High Surf Advisory in effect until noon PST Monday for zones 34-35. (See LAXCFWLOX). High Surf Advisory in effect until 4 AM PST Sunday for zone 39. (See LAXCFWLOX). Wind Advisory in effect until 3 AM PST Saturday for zones 39-52. (See LAXNPWLOX). High Surf Advisory in effect until noon PST Sunday for zones 40-41-87. (See LAXCFWLOX). PZ . Small Craft Advisory in effect until 3 AM PST Sunday for zone 645. (See LAXMWWLOX). Small Craft Advisory in effect from 3 AM to noon PST Saturday for zone 650. (See LAXMWWLOX). Gale Warning in effect from noon Saturday to 3 AM PST Sunday for zones 650-655-676. (See LAXMWWLOX). Small Craft Advisory in effect from midnight tonight to noon PST Saturday for zone 655. (See LAXMWWLOX). Small Craft Advisory in effect until 3 AM PST Monday for zones 670-673. (See LAXMWWLOX). Small Craft Advisory in effect until noon PST Saturday for zone 676. (See LAXMWWLOX).

.HAZARD POTENTIAL OUTLOOK (MON-FRI).

Gusty northeast winds possible across parts of LA/Ventura Counties Monday and Tuesday.



PUBLIC . MW AVIATION . RAT MARINE . Sirard BEACHES . Sirard SYNOPSIS . Phillips

weather.gov/losangeles


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
ICAC1 - 9410840 - Santa Monica Pier 18 mi55 min SW 2.9 G 5.1 59°F 62°F1017.8 hPa
BAXC1 26 mi55 min N 7 G 8.9
PSXC1 26 mi55 min WNW 5.1 G 8
PXAC1 26 mi61 min NNW 5.1 G 7
PFXC1 27 mi55 min NW 7 G 7
PFDC1 28 mi55 min NW 4.1 G 5.1
PRJC1 28 mi55 min W 8 G 9.9
AGXC1 29 mi55 min WSW 6 G 7
OHBC1 - 9410660 - Los Angeles, CA 29 mi55 min 64°F1017.9 hPa
46221 - Santa Monica Bay, CA (028) 30 mi23 min 62°F4 ft
46256 30 mi49 min 62°F4 ft
46222 - San Pedro, CA (092) 37 mi26 min 62°F5 ft
46253 39 mi49 min 63°F4 ft

Wind History for Santa Monica, CA
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Los Angeles / USC Campus Downtown, CA9 mi57 minW 33.00 miOvercast with Haze63°F55°F78%1017.1 hPa
Burbank - Bob Hope Airport, CA9 mi56 minSSE 45.00 miFair with Haze63°F53°F70%1016.1 hPa
El Monte, CA10 mi64 minSW 64.00 miFair with Haze64°F55°F73%1017.3 hPa
Los Angeles, Whiteman Airport, CA14 mi1.9 hrsN 010.00 miClear66°F50°F56%1018.3 hPa
Santa Monica, Santa Monica Municipal Airport, CA15 mi58 minVar 45.00 miFog/Mist59°F55°F90%1017.3 hPa
Hawthorne, Hawthorne Municipal Airport, CA16 mi56 minW 55.00 miOvercast with Haze61°F55°F81%1017.6 hPa
Van Nuys, Van Nuys Airport, CA16 mi58 minENE 48.00 miPartly Cloudy65°F52°F63%1016.4 hPa
Los Angeles, Los Angeles International Airport, CA17 mi56 minW 79.00 miOvercast61°F55°F81%1017.3 hPa
Brackett Field Airport, CA22 mi62 minWSW 510.00 miFair63°F53°F73%1017.6 hPa
Fullerton, Fullerton Municipal Airport, CA22 mi56 minS 64.00 miA Few Clouds with Haze62°F55°F78%1017 hPa
Long Beach, Long Beach Airport, CA22 mi56 minWNW 73.00 miFair with Haze60°F55°F84%1017.3 hPa
Torrance, Zamperini Field Airport, CA24 mi58 minSE 473.00 miMostly Cloudy and Windy57°F55°F94%1017.6 hPa

Link to 5 minute data for KMWS

Wind History from MWS (wind in knots)
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Tide / Current Tables for Santa Monica, California
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Santa Monica
Click for Map
Fri -- 02:46 AM PST     2.21 feet Low Tide
Fri -- 06:50 AM PST     Sunrise
Fri -- 08:13 AM PST     Moonset
Fri -- 09:03 AM PST     6.41 feet High Tide
Fri -- 04:25 PM PST     -0.89 feet Low Tide
Fri -- 04:45 PM PST     Sunset
Fri -- 06:24 PM PST     Moonrise
Fri -- 11:03 PM PST     3.75 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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3.32.72.32.22.53.34.35.36.16.46.15.33.92.40.9-0.3-0.8-0.8-0.20.81.92.93.53.7

Tide / Current Tables for Santa Monica, Municipal Pier, California
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Santa Monica
Click for Map
Fri -- 02:45 AM PST     2.21 feet Low Tide
Fri -- 06:50 AM PST     Sunrise
Fri -- 08:13 AM PST     Moonset
Fri -- 09:04 AM PST     6.31 feet High Tide
Fri -- 04:28 PM PST     -0.87 feet Low Tide
Fri -- 04:45 PM PST     Sunset
Fri -- 06:24 PM PST     Moonrise
Fri -- 11:03 PM PST     3.69 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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3.22.72.32.22.53.24.25.266.365.23.92.30.9-0.2-0.8-0.8-0.20.71.82.83.53.7

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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Wind Forecast for Los Angeles/Oxnard, CA (20,4,5,8)
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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 numerious 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.