Acton, California 7 Day Weather Forecast

Wx Forecast - Wx Discussion - Wx Aviation

136
FXUS66 KLOX 042323
AFDLOX

Area Forecast Discussion
National Weather Service Los Angeles/Oxnard CA
423 PM PDT Sat Jul 4 2026

.SYNOPSIS...04/1213 PM.

Onshore flow will continue to bring low clouds to the coasts and
coastal valleys each night through morning. The onshore flow will
start to weaken Monday and cause decreasing clouds in the valleys
and gradually warming temperatures. Expect a return to above
normal temperatures early next week.

&&

.SHORT TERM (TDY-TUE)...04/1224 PM.

Lots of mid/high level clouds can be seen on satellite imagery
streaming across the region. This is associated with some sub-
tropical moisture that is lifting northeast across southern
California this afternoon. While not likely, some of the meso-
scale models are initiating a few light showers/weak thunderstorms
into the evening/early overnight hours...and have a 5-10 percent
pop in the forecast to cover this possibility. This cloud cover
has also helped to disrupt the marine layer this morning,
although a return of the marine layer to at least the immediate
coast and coastal valleys is anticipated for Sunday morning.

With a lessening extent of the marine layer expected each morning
along with increasing heights aloft, afternoon temperatures will
continue to warm each afternoon, with above normal
temperatures...from near 80 along the coasts to near 100 across
the inland valleys...returning by Monday or Tuesday afternoon.

.LONG TERM (WED-SAT)...04/1224 PM.

Above normal temperatures and dry weather are anticipated through
the extended periods as high pressure strengthens aloft helping
to aid in a continued warming trend across the region.

At this point, the upper level ridge looks to be centered across
southern California over the Wednesday/Thursday time period, when
afternoon temperatures should peak. The ridge is then expected to
shift north and east by the end of the week and over next
weekend, providing some minor relief to end the week. That said,
temperatures are still expected to remain well above average to
end the current forecast period, and likely beyond - with CPC
outlooks continuing to favor above normal temperatures through at
least week 2.

Given the anticipated warm up, there will be at least a minor to
moderate heat risk each day, with about a 70% chance that heat
advisories will eventually become necessary Tuesday-Thursday
across mainly inland areas including the San Fernando and Santa
Clarita valleys.

Finally, an increased surface pressure gradient early next week
will also likely result in a return to modest sundowner winds
both Tuesday and Wednesday nights.

&&

.AVIATION...04/2259Z.

At 2200Z at KLAX, there was no marine layer. There was a surface
based inversion that was 800 ft deep. The top of inversion was at
2500 feet with a temperature of 22 C.

High confidence in VFR TAFs for desert airfields (KWJF & KPMD).

Moderate confidence in remainder of TAFs. Timing of flight cat
changes may be off by +/- 2 hours and CIG heights +/- 300 ft.
There is a non-zero chance of a thunderstorm for KLAX, KBUR, KVNY
KSMO, & KLGB through this evening.

KLAX...Moderate confidence in TAF. VFR conditions with widespread
high clouds BKN100-150 through 05/06Z-07Z. Arrival and clearing
times of 008-010 CIGs may be off +/- 3 hours. There is a non-zero
chance of a thunderstorm through this evening. No significant
easterly wind component expected.

KBUR...Moderate confidence in TAF. There is a 15% chance of
BKN005-010 05/11Z-15Z. Otherwise, VFR conditions with no
wind issues are expected.

&&

.MARINE...04/714 AM.

For the Outer Waters, moderate to high confidence remains for the
current forecast. High confidence in winds and seas remaining
below Small Craft Advisory (SCA) levels through Sunday morning.
For Sunday afternoon through Thursday, there is a 50-80% chance
of SCA level winds. Seas will begin gradually increasing Sunday
and will reach advisory levels mid-week. There may be a shower
or two across the northern waters this evening.

For the Inner Water north of Point Sal, moderate to high
confidence in current forecast. Winds and seas are expected to
remain below SCA levels through Monday morning. There is a 40%
chance of SCA level winds on Monday, 70% chance Tuesday &
Wednesday, and a 60% chance on Thursday. Seas will begin
gradually increasing Sunday and will near advisory levels mid-
week.

For the Inner Waters south of Point Conception, moderate to high
confidence in current forecast. High confidence in winds and seas
remaining below SCA levels through Saturday. From Sunday through
Wednesday, there is a 50-80% chance of SCA level winds across the
western portion of the Santa Barbara Channel. Local gusts could
approach 21 kts during the late afternoon through evening hours
near Point Dume and across the San Pedro Channel.

&&

.LOX WATCHES/WARNINGS/ADVISORIES...
CA...NONE.
PZ...NONE.

&&

$$

PUBLIC...Rossi
AVIATION...SF
MARINE...DB/KL
SYNOPSIS...Rossi

weather.gov/losangeles

Experimental Graphical Hazardous Weather Outlook at:
https://www.weather.gov/erh/ghwo?wfo=lox