Sunday, December8, 2019
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Marine Weather and Tides
La Crescenta-Montrose, 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 6:45AMSunset 4:44PM Sunday December 8, 2019 2:32 AM PST (10:32 UTC) Moonrise 3:45PMMoonset 4:11AM Illumination 87% Phase: Waxing Gibbous; Moon at 11 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 Am Pst Sun Dec 8 2019
.small craft advisory in effect from noon pst today through late tonight...
Today..Winds variable 10 kt or less, becoming W 10 to 20 kt with gusts to 25 kt in the afternoon. Combined seas 4 to 6 ft dominant period 12 seconds. Showers likely.
Tonight..W winds 10 to 20 kt with gusts to 25 kt, becoming nw 10 to 15 kt after midnight. Strongest western portion. Combined seas 3 to 5 ft dominant period 12 seconds. Slight chance of showers in the evening.
Mon..N winds 5 to 10 kt. Wind waves 2 ft or less. W swell 3 ft at 11 seconds.
Mon night..NW winds 5 to 10 kt in the evening, becoming variable 10 kt or less. Wind waves 2 ft or less. W swell 2 to 3 ft at 10 seconds. S swell 2 ft.
Tue..Winds variable 10 kt or less. Wind waves 2 ft or less. W swell 2 ft at 9 seconds.
Tue night..NW winds 10 kt in the evening, becoming variable 10 kt or less. Wind waves 2 ft or less. S swell 2 ft at 15 seconds.
Wed..NW winds 10 to 15 kt. Wind waves 2 ft or less. W swell 2 ft.
Thu..NW winds 5 to 10 kt. Wind waves 2 ft or less. W swell 2 to 3 ft.
PZZ600 223 Am Pst Sun Dec 8 2019
Synopsis for the southern california coast and santa barbara channel including the channel islands national marine sanctuary and national park..At 10z or 2 am pst, a 1006 mb low was near eureka. A cold front extended from northern ca to Monterey bay and 200 nm west of pt. Conception. A 1024 mb high pressure area was over western co. The front will move inland today with w-nw winds developing across the coastal waters in the afternoon. A relatively large wnw swell will continue to affect the coastal waters through tonight.


7 Day Forecast for Marine Location Near La Crescenta-Montrose, CA
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location: 34.26, -118.28     debug


Area Discussion for - Los Angeles/Oxnard, CA
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FXUS66 KLOX 080844 AFDLOX

Area Forecast Discussion National Weather Service Los Angeles/Oxnard CA 1244 AM PST Sun Dec 8 2019

SYNOPSIS. 07/824 PM.

Clouds and showery conditions will continue into Sunday as the low pressure system slowly moves east. There will be a slight chance of thunderstorms overnight and Sunday before the area dries out Monday. Temperatures will gradually warm next week as high pressure brings dry weather and more sunny skies.

SHORT TERM (SUN-WED). 07/1006 PM.

***UPDATE***

No changes to the afternoon forecast in respect to rain. However, a High Surf Advisory was added for the L.A. County Coast as exposed west facing beaches around Manhattan Beach to the Palos Verdes Peninsula were experiencing larger surf to around 8 feet late today.

As for the storm . There will continue to be a weak Atmospheric River aimed at Southern and Central California this evening trailing to below the Hawaiian Islands. Latest IVT (Integrated Vapor Transport) was not terribly impressive associated with this fetch of moisture, and PWAT Values were around 1". Although IR and Water Vapor satellite imagery might look impressive, rainfall totals have been relatively light at the lower levels while elevated locations such as foothills and coastal slopes have shown this to be an efficient rain-producer. Hourly rates have behaved quite well today with 0.10" per hour rates for most areas. Most coast and coastal valleys have received anywhere from 0.05" to 0.75", while most foothill and mountain locations have received 0.50" to just under 2.00" This has been good for the recent burn areas. Slow and steady. However, the pattern could become more convective later this evening through the overnight hours.

Currently, there is an upper level low over OR/CA border with an associated cold front moving through Monterey County. This upper low feature will open up and swing south across California into Arizona by Monday. The associated cold front along the surface will slide south into SLO County this evening while a strong 125 KT westerly jet begins to move across the region. There will be some enhanced lift on the front left quadrant of the jet which will help to enhance rainfall rates initially across SLO/SBA Counties later this evening and overnight hours. As the upper trough continues to sag south, much of the inland areas including the L.A./Ventura County Mountains and valleys will be dealing with some instability and a slight chance for additional thunderstorms. At this time, feeling that if any thunderstorms do develop over recent burn areas, hourly rainfall rates will be around 0.50" per hour. With hourly rainfall rates this high, there could be some limited debris flows, but would be handled with flood advisories.

***From Previous Discussion***

At the surface, a secondary cold front over the E Pac will move into swrn CA tonight and Sun to bring additional widespread showers to the region. Colder air aloft (-20 to -24 deg C at H5) will be associated with the sharper upper level trof late tonight and Sun. This will help to bring enough instability to the area (e.g., LI's down to -1 to -2 over SLO County early Sun morning) for a slight chance of thunderstorms over SLO/SBA Counties late tonight and Sun morning and into much of the forecast area away from the coast Sun afternoon and early evening. There will also be lingering showers over portions of VTU/L.A. Counties thru Sun night, altho the chances of showers will diminish thru the night.

Light to occasionally moderate rainfall rates (up to 0.33 inch per hour) is expected during the period. Isolated heavier rainfall rates up to 0.50 inch per hour are possible with any thunderstorms, but overall the rainfall across southwestern CA should remain less than USGS estimates for mud and debris flows.

Another 0.25 to 0.75 inch of rainfall is expected across the region for tonight through Sun evening, with local amounts up to an inch possible in the foothills of NW SLO County. In general, the higher amounts are forecast for the foothills and mtns, especially along the south-facing slopes.

While snow levels will largely remain above 7000 feet with this storm system, they should fall to 6000 to 6500 feet Sun night. Not much snowfall is expected as most of the showers will have ended by the time snow levels lower below resort levels. Still, 1 to 3 inches of snow is expected mainly above 7000 feet Sun and Sun night, altho local higher amounts will be possible above 7500 feet.

Dry weather will prevail in all areas Mon thru Tue as the upper ridge builds in. Skies are expected to be mostly cloudy for the most part thru Sun night then become mostly clear for most areas Mon and Mon evening. Varying amounts of mainly hi level clouds should move into SW CA later Mon night into Tue for partly cloudy skies overall.

It looks like moderate Sundowner winds will affect the SBA County S coast and mtns Sun evening then some gusty sub-Advisory NE winds should develop for the offshore wind prone areas later Sun night into Mon morning. High temps are forecast to remain a few degrees below normal for most areas Sun thru Tue, altho the warmest days will be Mon and Tue as temps reach into to mid 60s to around 70 in the warmest vlys and inland coastal areas.

LONG TERM (THU-SUN). 07/235 PM.

The upper level ridge will move E Tue night while an upper level trof pushes quickly thru the area. Upper level ridging is expected to build into srn CA from the Pac late Wed thru Fri, with H5 heights over swrn CA forecast to peak around 587 DM or so Fri morning. Flat upper ridging with slowly lowering H5 heights can be expected Fri night and Sat. The EC does forecast a weak weather system with some showers moving into SLO County Sat afternoon, but for now will keep any rain out of the forecast pending further model runs.

There should be varying amounts of mid and hi level clouds at times Wed morning, otherwise mostly clear skies can be expected across the region thru the extended period. There should also be some gusty NW to N winds developing over the SBA County mtns and S coast Wed evening, with gusty NW winds in the L.A. County mountains along the I-5 corridor. These winds will shift to N to NE late Wed night into Thu morning and affect the usual wind prone areas of VTU/L.A. Counties. The gusty NE winds should persist Thu night into Fri morning as well. Winds may approach Advisory levels at times during the period.

Temps on Wed are forecast to be near normal for the coast and vlys and several degrees above normal in the mtns. Temps should then increase to several degrees above normal in all areas for Thu thru Sat. Expected highs for the warmest coast and vlys are in the 60s to around 70 on Wed, and in the 70s Thu thru Sat.

AVIATION. 08/0604Z.

At 0530Z at KLAX, there was a deep moist layer with no inversion.

Low confidence in all TAFs except moderate for desert TAF sites. Cigs and vis will vary frequently. Flight Cats will predominately be IFR to Low MVFR with some High MVFR or even Low VFR conds as well. There is a 20 percent chc of LIFR conds through 15Z. Better confidence that flying conditions will improve some after 16Z and improve some more after 00Z.

KLAX . low confidence in TAF. Cigs and vis will vary frequently. Flight Cats will predominately be IFR to Low MVFR with some High MVFR or even Low VFR conds as well. There is a 10 percent chc of LIFR conds through 15Z. Better confidence that flying conditions will improve some after 16Z and improve some more after 00Z. There is a 30 percent chc of an 8kt east wind component 13Z-17Z.

KBUR . low confidence in TAF. Cigs and vis will vary frequently. Flight Cats will predominately be IFR to Low MVFR with some High MVFR or even Low VFR conds as well. There is a 20 percent chc of LIFR conds through 15Z. Better confidence that flying conditions will improve some after 16Z and improve some more after 00Z.

MARINE. 07/934 PM.

For the Outer Waters, high confidence through Sunday morning then moderate confidence. Weakening south winds this evening and overnight, then increasing northwest winds late Sunday. There is a 40 percent chance of Small Craft Advisory (SCA) conditions for southern sections of PZZ673 and PZZ676 by Sunday evening and continuing into early Monday. Another chance of SCA conditions arrives on Wednesday next week.

For the Inner Waters north of Point Sal, high confidence in current forecast. Remaining below SCA conditions, but there will be local gusts around 20 kt late Sunday afternoon when winds switch to northwest. Moderate confidence in winds and seas remaining below SCA levels through midweek.

For the Inner Waters south of Point Conception, moderate confidence in current forecast. Weak southeast winds into Sunday, then turning northwest Sunday afternoon with SCA conditions developing across the Santa Barbara Channel and southward through Sunday night. There is a 30 percent chance the gusty northwest winds make it to Catalina Island Sunday evening then winds weaken early Monday. Otherwise, winds and seas are likely to remain below SCA levels late Monday through midweek.

BEACHES. 08/1242 AM.

A relatively large, long-period, west to northwest swell will continue to bring high surf conditions to the Central Coast as well as the Ventura and Los Angeles County coast through Sunday afternoon.

For the Central Coast, surf heights will peak between 9 and 12 feet this morning, before lowering to between 7 and 10 feet. For exposed west-facing beaches of Ventura and Los Angeles counties, surf heights will be 4 to 7 feet with sets to 8 feet near the Ventura harbor as well as between Manhattan Beach to the Palos Verdes Peninsula. High surf advisories will continue for these areas through this afternoon. For the west-facing beaches of southern Santa Barbara county, there will be elevated surf conditions across exposed west facing beaches through this afternoon with surf heights of 3-5 feet.

For all coastal areas . there will be an increased risk for ocean drowning. Rip currents can pull swimmers and surfers out to sea. Large breaking waves can cause injury . wash people off beaches and rocks . and capsize small boats near shore.

Late this week there will be the potential for a larger surf episode along our west-facing beaches originating from a northern Pacific storm system. Tides will be building toward 7.0 feet by Friday which would also bring a risk of coastal flooding. Stay informed about this event if you have plans near the ocean next week.

LOX WATCHES/WARNINGS/ADVISORIES. CA . High Surf Advisory in effect until 5 PM PST this afternoon for zones 34-35-40-41. (See LAXCFWLOX). PZ . Small Craft Advisory in effect from noon today to 4 AM PST Monday for zones 650-655. (See LAXMWWLOX).

.HAZARD POTENTIAL OUTLOOK (WED-SUN).

No significant hazards expected.



PUBLIC . Kaplan/Sirard AVIATION . Rorke MARINE . Kaplan/EB BEACHES . Kaplan/EB 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 21 mi50 min Calm G 1.9 59°F 62°F1018.7 hPa
46221 - Santa Monica Bay, CA (028) 34 mi36 min 62°F5 ft
BAXC1 34 mi44 min Calm G 1
PSXC1 34 mi44 min SSE 1 G 1.9
PXAC1 34 mi44 min ESE 1 G 1
PFDC1 36 mi44 min Calm G 1
PFXC1 36 mi44 min S 1.9 G 1.9
OHBC1 - 9410660 - Los Angeles, CA 37 mi50 min 63°F1018.8 hPa
PRJC1 37 mi44 min SW 2.9 G 4.1
AGXC1 38 mi50 min Calm G 0
46256 39 mi32 min 62°F3 ft
46222 - San Pedro, CA (092) 44 mi39 min 63°F6 ft
46253 48 mi32 min 63°F4 ft

Wind History for Santa Monica, CA
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Burbank - Bob Hope Airport, CA6 mi39 minESE 47.00 miOvercast58°F55°F90%1017.2 hPa
Van Nuys, Van Nuys Airport, CA12 mi41 minN 06.00 miFog/Mist58°F55°F90%1017.6 hPa
Los Angeles / USC Campus Downtown, CA17 mi40 minN 08.00 miLight Rain62°F57°F84%1017.9 hPa
Santa Monica, Santa Monica Municipal Airport, CA18 mi41 minN 05.00 miFog/Mist59°F57°F93%1018.4 hPa
Los Angeles, Los Angeles International Airport, CA23 mi39 minNNE 38.00 miOvercast62°F57°F84%1018.2 hPa

Link to 5 minute data for KBUR

Wind History from BUR (wind in knots)
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Last 24hrNW3CalmCalmCalmCalmCalmCalmCalmCalmSE9SE7SE6CalmCalmCalmE4SE6S5SE6S4S4SE3CalmSE4
1 day agoCalmW3CalmW3CalmCalmSE3CalmSE3S35SE6S63CalmSW5S3W4NW3N7CalmSW4CalmCalm
2 days agoCalmSW4CalmCalmCalmNE3CalmS4S54S4SE4CalmSW4S4CalmCalmW4NE3CalmN5CalmNE3N4

Tide / Current Tables for Santa Monica, Municipal Pier, California
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Santa Monica
Click for Map
Sun -- 12:09 AM PST     1.49 feet Low Tide
Sun -- 03:12 AM PST     Moonset
Sun -- 06:35 AM PST     5.40 feet High Tide
Sun -- 06:46 AM PST     Sunrise
Sun -- 01:28 PM PST     0.50 feet Low Tide
Sun -- 02:45 PM PST     Moonrise
Sun -- 04:44 PM PST     Sunset
Sun -- 07:27 PM PST     3.71 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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1.51.62.2344.85.35.44.94.131.910.60.611.82.63.33.73.73.32.72.1

Tide / Current Tables for Santa Monica, California
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Santa Monica
Click for Map
Sun -- 12:05 AM PST     1.52 feet Low Tide
Sun -- 03:12 AM PST     Moonset
Sun -- 06:32 AM PST     5.46 feet High Tide
Sun -- 06:46 AM PST     Sunrise
Sun -- 01:24 PM PST     0.55 feet Low Tide
Sun -- 02:45 PM PST     Moonrise
Sun -- 04:44 PM PST     Sunset
Sun -- 07:26 PM PST     3.76 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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1.51.72.33.14.14.95.45.44.94.131.910.60.61.11.92.73.43.73.73.32.72.1

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 (5,6,7,8)
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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 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.