Sunrise 6:07 AM   Sunset 7:33 PM Moonrise 9:40 PM   Moonset 6:56 AM

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PZZ655 Inner Waters From Point Mugu To San Mateo Pt. Ca Including Santa Catalina And Anacapa Islands- 903 Am Pdt Thu Apr 25 2024
.small craft advisory in effect from 3 pm pdt this afternoon through Friday afternoon - ..gale watch in effect from Friday afternoon through late Friday night - .
Today - W winds 10 to 20 kt, becoming 15 to 25 kt in the afternoon. Wind waves 2 to 3 ft. Mixed swell W 2 to 3 ft at 7 seconds and S 2 ft at 15 seconds. Tonight - Western portion, W winds 15 to 25 kt. Elsewhere, sw winds 10 to 20 kt becoming variable 10 kt or less after midnight. Combined seas 4 to 6 ft dominant period 7 seconds, building to 6 to 8 ft. Fri - Western portion, W to nw winds 15 to 25 kt, becoming 25 to 35 kt with possible gusts to 40 kt in the afternoon. Eastern portion, W winds 10 to 20 kt, becoming 20 to 30 kt with possible gusts to 35 kt in the afternoon. Combined seas 7 to 9 ft dominant period 8 seconds, building to 8 to 11 ft dominant period 8 seconds in the afternoon. Fri night - Western portion, W to nw winds 25 to 35 kt with possible gusts to 40 kt, becoming 20 to 30 kt late. Eastern portion, W winds 20 to 30 kt with possible gusts to 35 kt, becoming 10 to 20 kt after midnight. Combined seas 8 to 11 ft dominant period 9 seconds.Sat - Western portion, W to nw winds 15 to 25 kt becoming 20 to 30 kt in the afternoon. Eastern portion, W winds 10 to 15 kt, becoming 15 to 25 kt in the afternoon. Combined seas 7 to 10 ft dominant period 9 seconds.Sat night - Western portion, W to nw winds 20 to 30 kt becoming 15 to 25 kt after midnight. Eastern portion, W winds 15 to 25 kt becoming 10 to 15 kt after midnight. Combined seas 7 to 9 ft dominant period 9 seconds. Sun - W winds 10 to 20 kt with local gusts to 25 kt. Wind waves 2 to 4 ft. W swell 6 to 8 ft. Mon - W winds 10 to 20 kt with local gusts to 25 kt. Wind waves 2 to 4 ft. W swell 6 to 8 ft.

PZZ600 903 Am Pdt Thu Apr 25 2024
synopsis for the southern california coast and santa barbara channel including the channel islands national marine sanctuary and national park - .at 15z, or 8 am pdt, a 1028 mb high was centered 800 nm west of point conception. A 1002 mb low was centered in colorado. Strong to gale force nw to W winds will affect much of the waters into the weekend.

FXUS66 KLOX 251905 AFDLOX

Area Forecast Discussion National Weather Service Los Angeles/Oxnard CA 1205 PM PDT Thu Apr 25 2024

SYNOPSIS
25/240 AM.

Strong onshore flow and a deep marine layer will keep temperatures much cooler than normal across much of Southwest California through Friday. Warmer weather is expected by the weekend into early next week.

.SHORT TERM (TDY-SAT)...25/853 AM.

***UPDATE***

A deep moist layer around 5000 ft thick covered the forecast area this morning. Low clouds shrouded much of the region with only parts of the SBA County S coast, the higher mtns and Antelope Vly free of clouds. The clouds are expected to thin and scatter out for much of the coast and a few adjacent vlys into the afternoon, but overall should linger for much of the coastal slopes and inland vlys.

During the afternoon, gusty mainly sub-Advisory level NW to N winds are expected to affect the Central Coast, the southwestern SBA County mtns and coast, he Antelope Vly including foothills, and the L.A. County mtns along the I-5 Corridor. Otherwise, breezy onshore winds can be expected this afternoon.

A cool air mass from a departing upper level trof will result in afternoon temps today about 6-12 deg below seasonal norms.
Highs should only be in the 60s for much of the coast, vlys and deserts.

***From Previous Discussion***

The north winds will increase today and advisory levels gusts will develop in the early evening across the SW portion of SBA county where a wind advisory is in effect from 6pm to 6am. Strong winds will develop more slowly across the mtns and Antelope Vly and wind advisories will likely be issued later in the day these areas. The north flow will also bring upslope clouds and a slight chc of showers to north slopes near the Kern County line. Low confidence in the stratus forecast which may well be mixed out.
Right now betting on the the north winds to clear out most of VTA county and the SBA south coast with cloudy conds across LA county and the Central Coast.

Friday will be a breezy day as the NW flow reaches its maximum.
These winds will scour out the low clouds and will be a sunny day.
Advisory level gusts are likely for the Santa Ynez Mountains, VTA mtns, northern I-5 corridor, and Antelope Valley. Look for 3 to 6 degrees of warming which will only make a small dent in the below normal max temps.

A little inside slider will move down the CA/NV border Friday night and will again bring a slight chc of N slopes showers to the N slopes near the Kern county line. It will also reinforce the N winds and advisory level northerly winds will likely continue through dawn in the mtns and Antelope Vly with the strongest winds focused through the I-5 corridor.

Saturday will see sunny skies and decreasing winds. 3 to 6 degrees of warming will result from the offshore flow from the north, the lack of marine layer, sunny skies and rising hgts.

.LONG TERM (SUN-WED)...25/326 AM.

Sunday and Monday will be very nice days with plenty of sunshine and warming temps. All brought about by a weak ridge moving overhead, weaker onshore flow to the east and continued offshore flow from the north. Monday will likely be the warmest day of the next 7 with highs in the 70s and lower 80s in the valleys and upper 60s and 70s near the coast. These max temps will end up a degree or 2 either side of normals.

Tuesday may have similar temps to Monday or it will cool some. It all depends on how quickly the ridge breaks down and onshore flow increases.

Troffing and increased onshore flow and a likely return of coastal low clouds will ensure that Wednesday ends up about 4 degrees cooler than Tuesday.

AVIATION
25/1858Z.

At 1742Z at KLAX, the marine layer was up to 5000 ft, and a weak inversion with a top around 5900 ft and a temperature of 5 C.

Moderate confidence in TAFs. Today cigs will continue to clear and lift until around 01Z Fri, then they will start to redevelop. Due to a weakening inversion, clouds may be variable and scatter and reform through the period. Expect mostly MVFR cigs tonight. Gusty NW winds will affect southern SBA County and the I-5 Corridor, and gusty W winds will continue and strengthen in the Antelope Valley. LLWS and turbulence, with mdt UDDF near the mtns expected starting, especially after 00Z Fri.

KLAX...Moderate confidence in TAF, with uncertainty in OVC015 cig arrival timing/clearing. There is a 20% chance that conds will be BKN035 or higher tonight. There is a 30% chance of east winds reaching 8 kts from 08Z-14Z.

KBUR...Moderate confidence in TAF, with uncertainty in OVC015 cig arrival timing/clearing. There is a 20% chance that conds will be BKN035 or higher tonight.

MARINE
25/1202 PM.

In the Outer Waters, winds are mostly at at Small Craft Advisory (SCA) level. SCA level winds and seas will likely continue thru Mon. There is a 30% chance of gales in the southern 2 zones (PZZ673/676) this evening thru late tonight. There is a 60-80% chance of gales across all of the outer waters Fri morning or early Fri afternoon thru late Fri night, best chances in the southern 2 zones. There is a 50% chance that gales will occur again Sat afternoon into Sat night or possibly Sun, especially in the southern zones.

For the Inner Waters N of Pt. Sal, winds are just reaching SCA levels. SCA level winds/seas will likely continue much of the time thru Mon. There is a 50-70% chance of gales Fri afternoon/evening, with a 30% chance of gales into Sat evening, with a brief respite Sat morning.

In the Inner Waters S Pt Conception, SCA winds are occuring in western portions of the SBA Channel, and spreading across the rest of the Channel and into western portions of the southern inner waters this afternoon. Winds may occasionally drop below SCA levels late tonight or early Fri near the coast, then SCA level winds and seas are expected from late Fri morning thru Sat night, and most likely thru Mon. There is a 60-70% chance of gales Fri afternoon into Fri night, with a 40-50% chance of gales Sat afternoon into Sat night.

LOX WATCHES/WARNINGS/ADVISORIES
CA...Wind Advisory in effect from 6 PM this evening to 6 AM PDT Friday for zones 349-351. (See LAXNPWLOX).
PZ...Small Craft Advisory in effect until 3 PM PDT Friday for zones 645-655-670. (See LAXMWWLOX).
Gale Watch in effect from Friday afternoon through Friday evening for zones 645-670. (See LAXMWWLOX).
Small Craft Advisory in effect until 9 AM PDT Friday for zones 650-673-676. (See LAXMWWLOX).
Gale Watch in effect from Friday morning through late Friday night for zones 650-673-676. (See LAXMWWLOX).
Gale Watch in effect from Friday afternoon through late Friday night for zone 655. (See LAXMWWLOX).

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