Sunrise 6:15 AM   Sunset 7:43 PM Moonrise 8:55 PM   Moonset 6:06 AM

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PZZ670 Point Piedras Blancas To Point Sal From 10 To 60 Nm- 948 Pm Pdt Wed Apr 24 2024
.small craft advisory in effect from 9 am pdt Thursday through Friday afternoon - ..gale watch in effect from Friday afternoon through late Friday night - .
Tonight - NW winds 10 kt in the evening, becoming 10 to 15 kt. Wind waves 1 to 3 ft. NW swell 3 to 4 ft at 10 seconds. Thu - NW winds 15 to 25 kt, becoming 20 to 25 kt in the afternoon. Combined seas 4 to 6 ft dominant period 10 seconds, building to 6 to 7 ft dominant period 7 seconds in the afternoon. Thu night - NW winds 15 to 25 kt with gusts to 30 kt. Combined seas 5 to 7 ft dominant period 7 seconds. Patchy fog after midnight. Fri - NW winds 15 to 20 kt with gusts to 25 kt, becoming 20 to 30 kt with gusts to 35 kt in the afternoon. Combined seas 5 to 7 ft dominant period 7 seconds. Patchy fog in the morning. Fri night - NW winds 20 to 30 kt with gusts to 35 kt. Combined seas 8 to 9 ft dominant period 8 seconds. Patchy fog after midnight.Sat - NW winds 20 to 30 kt. Combined seas 9 to 10 ft dominant period 9 seconds. Patchy fog in the morning. Sat night - NW winds 25 to 30 kt in the evening, becoming 20 to 25 kt. Combined seas 8 to 10 ft dominant period 9 seconds. Patchy fog after midnight. Sun - NW winds 15 to 25 kt. Combined seas 7 to 9 ft. Patchy fog. Mon - NW winds 20 to 30 kt. Combined seas 8 to 11 ft.

PZZ600 948 Pm Pdt Wed Apr 24 2024
synopsis for the southern california coast and santa barbara channel including the channel islands national marine sanctuary and national park - .at 04z, or 9 pm pdt, a 1028 mb high was centered 1100 nm southwest of eureka, ca. A 1001 mb low was centered over utah.

FXUS66 KLOX 250647 AFDLOX

Area Forecast Discussion...UPDATED National Weather Service Los Angeles/Oxnard CA 1147 PM PDT Wed Apr 24 2024

SYNOPSIS
24/538 PM.

Strong onshore flow and a deep marine layer will keep temperatures much cooler than normal across much of Southwest California through Friday. Morning patchy fog and drizzle are expected across portions of the coast, valleys, and foothills. Warmer weather is expected by the weekend into early next week.

.SHORT TERM (WED-SAT)...24/756 PM.

***UPDATE***

Still plenty of cloud coverage visible in the satellite imagery, and expect the low clouds to extend well inland tomorrow morning as a trough will lift the marine layer. Look for morning drizzle in most of southeast LA County. The patch of clouds that contained some lightning activity mentioned in the previous short term discussion seems to be dissipating to our south and should not affect the sky this evening over our area.

It is still looking good for advisory strength winds beginning later Thursday evening in the western Santa Ynez Mountains, northern I-5 corridor, and Antelope Valley. Winds will increase in strength and coverage in Friday.

***From Previous Discussion***

A deep marine layer remains in place, however the inversion remains weak so clouds are generally focused across the inland valleys up against the south facing foothills as well as the Central Coast. Confidence remains low with regard to the sky coverage later tonight and Thursday as a trough approaches from the southwest. Satellite imagery shows some baroclinicity to it with even several lightning strikes near the low center earlier today. Models indicate significant weakening of the system as it continues it's trek towards either northern Baja or southern San Diego County so chances for any redevelopment are slim. Still, the low and mid level lifting associated with the low could generate some morning drizzle across southeast LA County. Many of the ensemble solutions suggest this as well.

Following the trough passage Thursday afternoon, increasing west to northwest winds are expected that will continue into Friday. In fact Friday has some of strongest winds this week with speeds up to 40 mph near and over the coast and up to 50 mph across the mountains and Antelope Valley. Expect there will be a need for wind advisories, possibly as early as late Thursday afternoon, but certainly by Friday.

Later Friday into early Saturday there is a 10-15% chance of light measurable rain across the interior mountains from far western LA County to Santa Barbara County as an inside slider trough brings some additional energy aloft as well a little bit of moisture.
Snow levels are at least 6000 feet so there's no threat of snow over the Grapevine, but there may be some light showers there and along the border with Kern County to around the Carrizo Plain in southeast SLO County. All that should end around sunrise Saturday leaving behind sunny skies in all areas with slightly warmer temperatures than Friday.

.LONG TERM (SUN-WED)...24/201 PM.

Sunday and Monday will be similarly nice days across the area with minimal stratus and warming temperatures. Monday will likely be the warmest day in this stretch with highs in the mid 80s in the valleys and upper 60s and 70s near the coast.

The rest of the week will be cooler with increasing low clouds and fog as well as onshore winds, particularly later in the week as another cold upper low drops out of the Gulf of Alaska.

AVIATION
25/0645Z.

At 0505Z at KLAX, the marine layer was 5600 feet deep. The top of the inversion was at 6700 feet with a temperature of 6 C.

High confidence in desert TAFs. Moderate confidence in remaining TAFs. KSBA has a 30 percent chc of bkn025-035 cigs 11Z-18Z, otherwise cigs will vary between BKN025 bkn035 through late morning. There is a a30 percent chc that sites with BKN conds in the TAF in the afternoon will see SCT conds.

KLAX...Moderate confidence in TAF. Cigs may dip as low as BKN025 but will likely (60 percent chc) remain between 035 and 045. There is a 30 percent chc of SCT conds 20Z-03Z. No east wind component is expected.

KBUR...Moderate confidence in TAF. Cigs will vary between BKN025 and BKN035 through 18Z. There is a 20 percent chc of SCT conds 20Z-03Z.

MARINE
24/1005 PM.

In the Outer Waters, current Small Craft Advisories (SCA) remain on track for tonight. SCA conds are expected Thu morning thru Sun. There is a 50-70% chance of gales starting Thu evening thru Mon, with the highest chances for the southern zone (PZZ676).
Lower confidence in gales for the waters north of Point Sal on Thursday afternoon/evening.

For the Inner Waters N of Pt. Sal, moderate to high confidence in the forecast. SCA level winds are likely in the afternoon/evening hours Thu-Sun. There is a 50% chance of gales Fri afternoon into late Fri night, and a 40-60% chance of gales Saturday night.

In the Inner Waters S Pt Conception, moderate confidence. Current Small Craft Advisories (SCA) remain on track for tonight, especially in the Santa Barbara Channel where winds are consistently gusting from 23-27 kts. SCA conds are likely in the SBA Channel and the western portions south of Point Mugu during the afternoon/eve hours Thursday. Strong SCA with possible gales appear likely Friday and there is a 50-60% chance of gales starting Fri morning into Sat. Lower confidence in winds over the weekend, as winds could shift more northerly limiting the SCA level and stronger winds to western portions of the Santa Barbara Channel.

LOX WATCHES/WARNINGS/ADVISORIES
CA...NONE.
PZ...Small Craft Advisory in effect from 9 AM Thursday to 3 PM PDT Friday for zones 645-670. (See LAXMWWLOX).
Gale Watch in effect from Friday afternoon through late Friday night for zones 645-655-670. (See LAXMWWLOX).
Small Craft Advisory in effect until 3 AM PDT Thursday for zones 650-655-676. (See LAXMWWLOX).
Gale Watch in effect from Friday morning through Saturday morning for zones 650-673. (See LAXMWWLOX).
Small Craft Advisory in effect from 9 AM Thursday to 9 AM PDT Friday for zone 673. (See LAXMWWLOX).
Gale Watch in effect from Thursday evening through Saturday morning for zone 676. (See LAXMWWLOX).

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