Sunrise 6:00 AM   Sunset 7:40 PM Moonrise 3:25 AM   Moonset 2:55 PM

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PZZ655 Inner Waters From Point Mugu To San Mateo Pt. Ca Including Santa Catalina And Anacapa Islands- 721 Am Pdt Fri May 3 2024
Today - SE winds 5 to 10 kt, becoming W 10 to 15 kt in the afternoon. Wind waves 2 ft or less. W swell 2 to 4 ft at 8 seconds. SW swell 2 ft in the morning. Patchy fog.Tonight - W winds 10 to 15 kt in the evening, becoming se 5 to 10 kt. Wind waves 2 ft or less. W swell 2 to 4 ft at 8 seconds. Patchy fog in the evening.Sat - SE winds 5 to 10 kt, becoming W 10 to 20 kt in the afternoon. Wind waves 1 to 3 ft. W swell 3 to 5 ft at 7 seconds.Sat night - W winds 10 to 20 kt in the evening, becoming 15 to 25 kt. Combined seas 5 to 7 ft dominant period 7 seconds. A chance of showers after midnight. Sun - Western portion, W winds 15 to 25 kt becoming 20 to 30 kt with local gusts to 35 kt in the afternoon. Elsewhere, W winds 10 to 20 kt, becoming 20 to 25 kt in the afternoon. Combined seas 5 to 7 ft dominant period 8 seconds, building to 7 to 10 ft dominant period 8 seconds in the afternoon. Sun night - Western portion, W to nw winds 20 to 30 kt with local gusts to 35 kt in the evening, becoming 15 to 20 kt. Elsewhere, W winds 20 to 25 kt, becoming 10 to 15 kt late. Combined seas 7 to 10 ft dominant period 9 seconds, subsiding to 5 to 7 ft dominant period 9 seconds after midnight. Mon - W to nw winds 10 to 20 kt. Wind waves 1 to 3 ft. W swell 3 to 5 ft. Tue - W to nw winds 10 to 20 kt. Wind waves 1 to 3 ft. W swell 4 to 6 ft.

PZZ600 721 Am Pdt Fri May 3 2024
synopsis for the southern california coast and santa barbara channel including the channel islands national marine sanctuary and national park - .at 12z, or 5 am pdt, a 1027 mb high was centered 900 nm W of point conception. A 1006 mb thermal low was centered near las vegas. Gale force winds will continue across the outer waters at times until late tonight.

FXUS66 KLOX 031649 AFDLOX

Area Forecast Discussion National Weather Service Los Angeles/Oxnard CA 949 AM PDT Fri May 3 2024

SYNOPSIS
03/909 AM.

A cooling trend will begin today with a deepening marine layer through the weekend. A storm system will brush the area to the north this weekend with a chance for light precipitation later Saturday into Sunday. Night and morning low clouds and fog will struggle to clear at the coast today, then spread back inland tonight. A warming and drying trend will develop next week.

.SHORT TERM (TDY-SUN)...03/919 AM.

***UPDATE***

The marine layer has deepened to around 3500 feet across the LA Basin, sloping down to around 1000 feet along the Central Coast.
The eddy is a little weaker than yesterday but onshore flow is stronger and it will take longer to clear the stratus today and through the weekend. Still looks like a high chance of rain along the Central Coast Saturday afternoon (around a quarter inch) as a late season storm moves into northern California, but mostly just brushes by our area. Farther south, rain chances will be Saturday night into early Sunday and lighter, mostly under a tenth of an inch. And like this morning some areas will see morning drizzle both Saturday and Sunday. With the storm exiting to the east Sunday and the flow shifting to the west/northwest there should be much better clearing in most areas.

***From Previous Discussion***

The storm system, over the Gulf of Alaska this morning, will dig south into northern California through Saturday night, brushing the area to the north. A cold frontal boundary will drop south into the region on Saturday, bringing rain to much of the area.
PoPs have been nudged higher in the latest forecast, going higher than NBM solutions. All of the ensemble members have light precipitation developing for areas north of Point Conception, along the northern slopes of the mountains, and across eastern Los Angeles County. The forecast is little more questionable for southern Santa Barbara County, Ventura County, and western Los Angeles County. The forecast trends wetter as deterministic solutions are starting to trend more southwest to west with the low-level flow pattern. The forecast trends more toward the deterministic solutions south of Point Conception, buying into the model trends. Model tabular forecast output suggests a high- to- likely chance of rain for areas north of Point Conception, and moderate-to-high chance for areas southwest of Point Conception.
There is a moderate chance that southern Santa Barbara County, Ventura County, and western Los Angeles County could end up being in a rain shadow effect as downsloping occurs from the Transverse Ranges. Rainfall amounts will likely range from a quarter inch or less, except a quarter to half inch across northwestern San Luis Obispo County. Amounts will be highest for the northern portion of the area and along the northern slopes of the mountains. Rainfall will only amount to a few hundredths at most for most coastal and valley areas south of Point Conception.

Gusty west to northwest winds will develop across many coastal areas, into the Santa Ynez Valley, across southern Santa Barbara, up into the Interstate 5 Corridor, and down into the Antelope Valley. EPS solutions indicate good agreement across the area for the potential for wind advisory, but a handful of solutions indicate a gust potential over 55 mph at KSDB. This will need to be monitored as we get closer as wind gusts have been trending generally higher with each run.

A colder air mass will spread into the area between Saturday and Sunday night with the cold front. Temperatures during this stretch trend colder than NBM values, and Sunday could be a cold day for May, similar to a February or March with 60s being common across the coastal and valley areas.

.LONG TERM (MON-THU)...03/415 AM.

A warming and drying trend will develop for the work week next week as high pressure aloft reestablishes. The forecast ensembles agree with a warming trend extending through at least Thursday. EPS solutions tend to hold onto the warming trend extending into next weekend. EPS cloud cover means point to the marine layer depth being kept in check, but confidence is moderate at best in this solution as we are in May. The latest forecast keeps some marine layer induced low clouds and clouds returning to coastal areas by mid week.

AVIATION
03/1649Z.

At 1600Z at KLAX, the marine layer was 3300 feet deep. The top of the inversion was at 4300 feet with a temperature of 13 degrees Celsius.

Overall, moderate to high confidence in 18Z TAF. There is a 40% chance that MVFR CIGs could remain at KSBA and KLAX through the afternoon. For tonight, high confidence in return of CIG/VSBY restrictions for all coastal and valley sites, but moderate confidence in timing of return and flight category changes.

KLAX...Moderate confidence in 18Z TAF. There is a 40% chance that MVFR CIGs will not dissipate this afternoon. No significant easterly wind component is expected.

KBUR...Moderate confidence in 18Z TAF. THere is a 20-30% chance that MVFR CIGs do not dissipate this afternoon. For tonight, there is a 30% chance that MVFR CIGs could arrive as early as 03Z.

MARINE
03/723 AM.

For the Outer Waters, Small Craft Advisory (SCA) level winds are expected to increase to Gales (70% chance) this afternoon, with the strongest winds off the coast. Gales will continue thru late tonight, then drop to SCA levels. Winds may even drop below SCA level for a while Sat morning, but seas will remain above SCA levels. SCA level winds are expected (80% chance) Sat afternoon, then continue much of the time thru Tue. There is a 50% chance of Gale force winds Sun afternoon/evening, then a 30-40% chance during the afternoon/eve hours Mon thru Tue.

For the Inner Waters north of Point Sal, SCA level winds will develop today, then continue thru late tonight. There is a 40-50% chance of SCA level winds/seas during the afternoon/eve hours Sat, then SCA winds are likely (70% chance) during the afternoon/eve hours Sun thru Tue. There is a 30% chance of gales Sun afternoon/eve.

For the Santa Barbara Channel, there is a 40% chance of SCA level winds in western portions of the channel this afternoon thru late tonight, then Sat afternoon/eve. SCA level W-NW winds are expected Sat night thru late Sun night (80% chance), and are likely (60-70% chance) during the late afternoon thru late night hours Mon thru Tue. There is a 30% chance of gales Sun afternoon/eve.

For the Southern Inner Waters, there is a 30% chance of SCA level winds from Anacapa Island to Malibu during the late afternoon/eve hours Sat. SCA level winds are likely (70% chance) Sat night thru late Sun night. There is a 40% chance of SCA level winds during the late afternoon thru late evening hours Mon thru Tue.

LOX WATCHES/WARNINGS/ADVISORIES
CA...NONE.
PZ...Small Craft Advisory in effect until 3 AM PDT Saturday for zone 645. (See LAXMWWLOX).
Gale Warning in effect until 3 AM PDT Saturday for zones 670-673-676. (See LAXMWWLOX).

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