Marine Weather and Tide Forecast for Oxnard, CA

.SHORT TERM (FRI-MON)...16/159 PM.

An approaching upper level trough is increasing onshore flow and cooling the air mass as well. Highs today cooled 3-6 degrees across most of the area with the exception of interior SLO County, the higher mountains, and the Antelope valley where temperatures warmed by 2-4 degrees.

The trough will continue to deepen across California resulting in a higher marine layer tonight, likely up to around 4000 feet, and possibly even some patchy drizzle or very light rain, especially near the south facing coastal slopes. Clearing will slower Saturday and some coast and valley areas may remain cloudy much of the day. There's also a chance of a reverse clearing pattern which would result in more clearing near the coast than inland areas.
Temperatures will likely stay in the 60s in most areas, which would be 5-15 degrees below normal. Gusty southwest winds are expected across the Antelope Valley in the afternoon and evening and gusty north to northwest winds are expected across southwest Santa Barbara County.

The trough is expected to shift east into the Rockies Sunday as a high pressure ridge over the eastern Pacific moves closer to the coast. A moderate offshore gradient trend will develop leading to 5-10 degrees of warming most areas with either minimal or earlier clearing marine layer. Another round of gusty Sundowner winds expected across southern Santa Barbara County is expected later Sunday afternoon and evening, and this time including eastern Santa Ynez as winds aloft start veer to the north and even slightly northeast.

The warming trend will continue Monday with some additional offshore trends leading to some morning northeast winds across the hills and mountains and possibly some of the valleys as well.
Expecting widespread warming trends of 5-10 degrees over Sunday and some valley areas as much as 15 degrees warmer, getting close to 90 degrees, including interior SLO County and the western San Fernando Valley.

.LONG TERM (TUE-FRI)...16/225 PM.

Next week is going to be a hot one and lasting at least two days longer than the previous heat wave. Highs are expecting to be fairly similar to the last heat wave, topping out in the low 100s in the warmer valleys Tuesday through, low 90s in Downtown LA, and 80s across most other areas except the beaches. There may still be a lingering shallow marine layer Monday morning across coastal LA County resulting in some dense fog but that should clear fairly quickly. If the forecast remains on track, and right now confidence is high, another round of heat advisories will be needed for the coastal valleys and possibly even parts of the interior coastal plain.

Onshore flow will start to return Thursday that will begin a slow cooling trend into next weekend.

AVIATION
17/0046Z.

At 00Z at KLAX, the marine inversion was around 15 feet deep. The top of the inversion was 2300 feet with a temperature of 17 degrees Celsius.

High confidence in TAFs for KWJF and KPMD.

Moderate confidence in TAFs for remaining sites where flight category changes may be off by 2 hours and 1 category. There is a 30-50 percent chance of only brief to no return to VFR at coastal sites from SBA and south including KLAX.

KLAX...Moderate confidence in TAF. There is a 20-30% chance for an east wind component of 8 kts between 10Z and 18Z. Best chances between 13Z and 17Z.

KBUR...Moderate confidence in TAF. Return of cigs may be off +/- 2 hours, and there is a 20% chance for cigs 007-009.

MARINE
16/156 PM.

For the Outer Waters through Tuesday, high confidence in combination of Small Craft Advisory (SCA) level winds and seas.
For Saturday afternoon through Sunday night, there is a 60-70% chance of Gale force winds. Gales look to be strongest and most widespread Sunday afternoon through late Sunday night. There may be a lull in the winds Sunday morning. Seas will reach 12-14 feet.
Rough, short period seas will exist into at least Monday.

For the Inner Waters through Sunday night, high confidence in SCA level winds, especially in the afternoon and evening hours. There is a 50-60% chance of Gale force winds Saturday afternoon through Sunday evening, with a lull in the winds likely late Saturday through Sunday morning. Another Gale Warning is likely for Sunday afternoon and evening. For Monday through Tuesday, there is a 50-70% chance of SCA level winds continuing. Seas will reach 10-12 feet. Rough, short period seas will exist into Monday.

For the Inner Waters south of Point Conception through Saturday morning, high confidence in winds and seas remaining below SCA levels. For Saturday afternoon through Sunday night, high confidence in SCA level winds focused mostly through the Santa Barbara and western sections of the southern Inner Waters.
Additionally, there is a 50% chance of Gale force winds across the Santa Barbara Channel Saturday evening through Saturday night.
There will be a relative lull in the winds overnight, then another Gale Warning is likely (50-60% chance) for the Santa Barbara Channel Sunday afternoon into late night. Seas may approach 8 feet with short periods due to the wind. For Monday through Tuesday, moderate confidence in winds and seas remaining below SCA levels.

LOX WATCHES/WARNINGS/ADVISORIES
CA...Wind Advisory in effect from 10 AM to 9 PM PDT Saturday for zones 381-383. (See LAXNPWLOX).
PZ...Small Craft Advisory in effect until 9 PM PDT this evening for zone 645. (See LAXMWWLOX).
Gale Warning in effect from 3 PM Saturday to 3 AM PDT Sunday for zone 645. (See LAXMWWLOX).
Small Craft Advisory in effect from noon to 6 PM PDT Saturday for zone 650. (See LAXMWWLOX).
Gale Warning in effect from 6 PM Saturday to 3 AM PDT Sunday for zone 650. (See LAXMWWLOX).
Small Craft Advisory in effect from 6 PM Saturday to 3 AM PDT Sunday for zone 655. (See LAXMWWLOX).
Small Craft Advisory in effect until 3 PM PDT Saturday for zones 670-673-676. (See LAXMWWLOX).
Gale Warning in effect from 3 PM Saturday to 3 AM PDT Monday for zones 670-673-676. (See LAXMWWLOX).