Monday, September27, 2021
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Marine Weather and Tides
Pasadena, CA

Version 3.4
NOTICE
3/30/2021 -- ANZ330 has been split into ANZ331 and ANZ332. Click EDIT in Marine Forecast and select your new zone.
1/26/2021 -- The West Coast Satellite images havd been updated. They now use GEOS-17.
1/1/2021 -- The 7 day forecast are now working well. Thank you NOAA for your support.

Sunrise 6:42AMSunset 6:44PM Sunday September 26, 2021 11:36 PM PDT (06:36 UTC) Moonrise 10:10PMMoonset 12:02PM Illumination 67% Phase: Waning Gibbous; Moon at 21 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- 846 Pm Pdt Sun Sep 26 2021
Tonight..W winds 5 to 10 kt late in the evening, becoming variable 10 kt or less. Wind waves 2 ft or less. Mixed swell W 2 ft at 14 seconds and S 2 ft at 17 seconds.
Mon..Winds variable 10 kt or less, becoming sw 10 kt in the afternoon. Wind waves 2 ft or less. Mixed swell W 2 ft at 13 seconds and S 2 ft at 16 seconds.
Mon night..W winds 10 kt in the evening, becoming variable 10 kt or less. Wind waves 2 ft or less. Mixed swell W 2 to 3 ft at 6 seconds and S 2 ft at 15 seconds.
Tue..Winds variable 10 kt or less, becoming sw 10 kt in the afternoon. Wind waves 2 ft or less. Mixed swell W 3 ft at 8 seconds and S 2 ft at 15 seconds.
Tue night..W winds 10 to 15 kt, becoming se 5 to 10 kt after midnight. Wind waves 2 ft or less. W swell 3 to 5 ft at 10 seconds.
Wed..SE winds 5 to 10 kt, becoming sw in the afternoon. Wind waves 2 ft or less. W swell 3 to 5 ft at 11 seconds.
Wed night..NW winds 5 to 10 kt. Wind waves 2 ft or less. Mixed swell W 2 to 4 ft and S 2 ft.
Thu..NW winds 10 to 15 kt. Wind waves 2 ft or less. Mixed swell W 2 to 3 ft and S 2 ft.
Fri..W winds 10 to 15 kt. Wind waves 2 ft or less. Mixed swell W 2 to 3 ft and S 2 ft. Patchy fog.
PZZ600 846 Pm Pdt Sun Sep 26 2021
Synopsis for the southern california coast and santa barbara channel including the channel islands national marine sanctuary and national park..At 03z, or 8 pm pdt, a 1019 mb surface high was centered around 600 nm west of point conception, and a 1010 mb thermal low was over northern baja. A northerly surface gradient will tighten across the coastal waters through Tuesday with possible gales developing over the outer coastal waters Tuesday afternoon and evening.


7 Day Forecast for Marine Location Near Pasadena, CA
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location: 34.16, -118.14     debug


Area Discussion for - Los Angeles/Oxnard, CA
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FXUS66 KLOX 270338 AFDLOX

Area Forecast Discussion National Weather Service Los Angeles/Oxnard CA 838 PM PDT Sun Sep 26 2021

SYNOPSIS. 26/216 PM.

A deepening marine layer and strengthening onshore flow will bring a cooling trend to the region through Tuesday. Low clouds will likely cover all the coasts and valleys each night through morning. A significant warming trend with much less marine layer is expected Wednesday through next weekend as offshore flow returns pushing temperatures above normal in most areas.

SHORT TERM (SUN-WED). 26/836 PM.

***UPDATE***

The marine layer deepened substantially last night, with clouds reaching deep into the coastal slopes and the Santa Clarita Valley by this morning. Clouds were sluggish to clear today, in part due to the strong onshore flow and reduced surface heating. The upper level low slowly pushed northeast over Arizona today, keeping northeast flow for the area. This flow pattern keeps smoke from the southern Sierra Mountain fires over the region. Otherwise, it was a fairly quiet day, with still cooler temperatures especially for areas experiencing afternoon stratus and upper level smoke. Westerly winds were gusty through the interior.

Tonight, stratus has moved into the coastal plains from Santa Barbara southward. LAX to DAG pressure gradients are up to 7.3 mb, about 3 mb stronger than last night. The marine layer remains deep, just over 2,000 feet. Therefore, expecting clouds to easily reach the coastal slopes again. With the strong onshore push, there is a slight chance for areas of sprinkles along the coastal slopes, where the marine layer clouds experience the most lift. Will wait for further guidance before adding it to the forecast.

Monday, the region remains stuck between the upper level low to the east and the approaching trough to the northwest. Flow shifts to the northwest as an upper level trough passes through, which is a step in the right direction to clearing out the smoke. Expecting similar temperatures as today, but some interior areas may be a few degrees warmer. Adjusting temperatures lower near the coast, to be more in line with what happened today.


***From Previous Discussion***

A trough and decaying cold front will move through the west coast Tuesday, likely causing some additional marine layer deepening and possibly even some morning drizzle. Another slow clearing day for southern areas but better clearing possible for the Central Coast depending on the timing of the frontal passage. Significant cooling for far interior areas due to the cold advection but not much change for coast and coastal valleys from Monday. Increasing northwest flow will bring breezy winds to the western areas by afternoon with advisory level Sundowners possible for southern Santa Barbara County Tuesday evening.

Marine layer expected to clear out with the cold advection and northwest flow down to around SB or western Ventura County by Tuesday afternoon and evening but still expecting a deep marine layer for LA County Wednesday morning before the inversion weakens there. Another cool-ish and locally breezy day Wednesday following the frontal passage but some warming expected due to less marine layer clouds and lighter onshore flow. In fact, light northeast winds are expected to develop across the interior by late morning.

LONG TERM (THU-SUN). 26/213 PM.

The latter half of the week will be a complete opposite pattern from the first half. Rising heights along with much weaker onshore flow (and perhaps even lightly offshore) will result in significantly warmer temperatures under mostly clear skies. It's still a little ways out and models are still at odds but looking at the ensembles it has a similar look and feel to the pattern from early last week when there was brief period of light offshore flow and temperatures rose up into the 90s for some inland coastal areas and over 100 in some of the valleys. For this reason the forecast from Thu-Sun has been adjusted up from the standard NBM forecast highs and closer to (though still at least a few degrees below) what we saw last week. If models stick with the offshore pattern temperatures for coast and valleys will likely need some additional boosting. Also of note is the ECMWF ensemble forecast of almost 40mph of northeast wind in the Santa Clarita Valley on Thursday which is 5-10 mph than earlier forecasts had shown.

Thursday appears to have the best support aloft for offshore winds but light offshore flow expected to continue into the weekend. This should keep temperatures well above normal for coast and valleys and bring temps back up to normal for far interior areas by late in the week. May start to see some marine layer returning to coastal areas by the weekend depending on how the gradients hold up.

AVIATION. 27/0112Z.

At 2341Z, the marine layer depth at KLAX was around 2300 feet. The top of the inversion was near 4200 feet with a temperature of 19 deg C.

Moderate confidence in desert TAFs due to a 30% chance for reduced vis due to smoke tonight. Otherwise, moderate confidence in the valleys and coast TAFs. Arrival times for the valleys and central coast may be off by 1-2 hours, and burn off times may be 1 hour earlier than forecast.

KLAX . Moderate confidence in the 00Z TAF. There is a chance cigs will clear late in the afternoon briefly. No significant east wind component expected.

KBUR . Moderate confidence in the 00Z TAF. MVFR cigs are expected, with a low chance for IFR cigs after 06Z.

MARINE. 26/825 PM.

For the outer waters, moderate to high confidence in the current forecast. Winds and seas will remain below Small Craft Advisory (SCA) levels tonight then NW winds will strengthen through the day on Monday. High confidence in at least SCA level winds Monday morning for the northern outer waters and by the afternoon for the southern portion from Point Conception to San Nicolas Island through Wednesday night. Moderate confidence in winds strengthening to Gale force, on Tuesday, and have issued a Gale Watch for Tuesday afternoon through late Tuesday night. Along with gusty winds there will also be steep, choppy seas at times Monday night through Wednesday.

For the inner waters N of Point Sal, moderate to high confidence in the current forecast. SCA level wind gusts and seas are expected mainly afternoons and evenings from Monday through Wednesday.

For the inner waters S of Point Conception, moderate to high confidence in the current forecast. Winds and seas are expected to largely remain below SCA levels through Friday, except for a 50% chance of SCA level wind gusts Monday evening for the western Santa Barbara Channel, then increasing to 60% chance for Tuesday.

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

.HAZARD POTENTIAL OUTLOOK (WED-SUN).

Gusty northeast winds are possible Thursday across Los Angeles and Ventura Counties.



PUBLIC . Phillips/MW AVIATION . Phillips/Sirard MARINE . Sirard/Stewart SYNOPSIS . MW

weather.gov/losangeles


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
ICAC1 - 9410840 - Santa Monica Pier 22 mi48 min SSW 4.1 G 5.1 63°F 66°F1017.8 hPa
46268 25 mi66 min 63°F 65°F2 ft
PSXC1 27 mi48 min SW 4.1 G 5.1
BAXC1 28 mi66 min SW 5.1 G 5.1
PXAC1 28 mi60 min SSW 4.1 G 5.1
PFXC1 29 mi48 min WSW 2.9 G 4.1 63°F
PFDC1 30 mi60 min SW 4.1 G 6
PRJC1 30 mi48 min W 8 G 8.9
AGXC1 31 mi60 min W 6 G 7 64°F 1014.8 hPa
OHBC1 - 9410660 - Los Angeles, CA 31 mi48 min 64°F1017.5 hPa
46256 32 mi40 min 62°F4 ft
46221 - Santa Monica Bay, CA (028) 34 mi40 min 67°F3 ft
46222 - San Pedro, CA (092) 39 mi40 min 64°F2 ft
46253 40 mi40 min 64°F3 ft

Wind History for Santa Monica, CA
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Burbank - Bob Hope Airport, CA12 mi43 minSSW 47.00 miOvercast62°F56°F80%1016.3 hPa
Los Angeles / USC Campus Downtown, CA12 mi44 minW 310.00 miOvercast63°F57°F81%1016.9 hPa
Los Angeles, Whiteman Airport, CA16 mi3.8 hrsESE 410.00 miClear63°F57°F83%1017.3 hPa
Brackett Field Airport, CA19 mi2.8 hrsW 610.00 miFair63°F57°F83%1017.3 hPa
Hawthorne, Hawthorne Municipal Airport, CA19 mi43 minWSW 410.00 miOvercast64°F57°F78%1017.3 hPa
Santa Monica, Santa Monica Municipal Airport, CA19 mi45 minWSW 310.00 miOvercast63°F58°F84%1017.4 hPa
Van Nuys, Van Nuys Airport, CA19 mi45 minSE 310.00 miOvercast62°F57°F84%1016.7 hPa
Los Angeles, Los Angeles International Airport, CA21 mi43 minSSW 510.00 miOvercast64°F56°F75%1017.2 hPa
Fullerton, Fullerton Municipal Airport, CA22 mi43 minN 010.00 miOvercast67°F58°F73%1016.8 hPa
Long Beach, Long Beach Airport, CA23 mi43 minWSW 410.00 miOvercast65°F57°F76%1017.1 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
Mon -- 03:49 AM PDT     3.01 feet High Tide
Mon -- 05:21 AM PDT     2.99 feet Low Tide
Mon -- 06:45 AM PDT     Sunrise
Mon -- 01:00 PM PDT     Moonset
Mon -- 01:09 PM PDT     4.61 feet High Tide
Mon -- 06:43 PM PDT     Sunset
Mon -- 09:56 PM PDT     1.42 feet Low Tide
Mon -- 10:54 PM PDT     Moonrise
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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2.42.72.933333.13.33.53.94.24.54.64.54.33.83.32.72.21.71.51.41.5

Tide / Current Tables for Santa Monica, Municipal Pier, California
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Santa Monica
Click for Map
Mon -- 03:28 AM PDT     2.94 feet High Tide
Mon -- 05:08 AM PDT     2.92 feet Low Tide
Mon -- 06:45 AM PDT     Sunrise
Mon -- 01:00 PM PDT     Moonset
Mon -- 01:08 PM PDT     4.56 feet High Tide
Mon -- 06:43 PM PDT     Sunset
Mon -- 10:02 PM PDT     1.40 feet Low Tide
Mon -- 10:54 PM PDT     Moonrise
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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2.42.72.92.92.92.92.933.23.53.94.24.44.64.54.23.83.22.72.21.81.51.41.5

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