Alhambra, California 7 Day Weather Forecast

Wx Forecast - Wx Discussion - Wx Aviation

773
FXUS66 KLOX 100701
AFDLOX

Area Forecast Discussion...UPDATED
National Weather Service Los Angeles/Oxnard CA
1201 AM PDT Sun Aug 10 2025

.SYNOPSIS...09/552 PM.

Broad high pressure over the region will keep a warm air mass in
place away from the coast through the weekend. Temperatures will
remain above seasonal normals into early next week, except along
the coast where typical onshore flow will keep temperatures
cooler. Areas of night through morning low clouds and fog will
remain a staple of the forecast along the coast and into some
coastal valleys. A cooling trend is expected to begin around the
middle of next week.

&&

.SHORT TERM (SAT-TUE)...09/825 PM.

***UPDATE***

The marine inversion early this evening was near 1000 ft deep at
both VBG and LAX. Low clouds were along much of the Central Coast
early this evening and will spread inland some overnight, along
with patchy dense fog. S of Point Conception, low clouds were
generally patchy over the coastal waters to some of the beaches
but are expected to expand a bit overnight and move to the coast
and inland some. Patchy dense fog also cannot be ruled out late
tonight for a few of these areas. Otherwise and elsewhere, mostly
clear skies will prevail thru the night, except for smokey
conditions at times in and around the Gifford and Canyon Fires.

Breezy to gusty S to W winds continued this evening, strongest in
the Antelope Vly and adjacent foothills. These winds will diminish
overnight, including in and around the wildfire areas. However,
there should be some breezy to gusty N canyon winds this evening
across southern SBA County, with isolated wind gusts to 35 mph
possible.

***From Previous Discussion***

High pressure aloft will keep temperatures above normal inland
through early next week. However, there remains a big contrast
between the coast and the interior as there is enough onshore flow
to keep coastal areas much cooler. A low stratus layer topped out
around 1200 feet will maintain a cool flow of air off the Pacific
ocean, keeping temperatures there in the 60s to low 70s. It`s the
in between areas that are struggle to forecast as just minor
changes to the onshore flow could make the difference between a 75
degree day and a 90 degree day. Overall though, while inland
area temperatures remain 4-8 degrees above normal, these are still
at least 3-6 degrees below heat advisory criteria in most areas
factoring in the overnight lows as well. However, the one area
that is starting to get close to needing a heat advisory is in the
mountains where lows have been in the mid to high 70s the last
few nights and even isolated lower 80s with highs in the mid to
high 90s.

Minimal changes are expected in these weather conditions through
at least Monday. By Tuesday, even with high pressure still in
place, lower level temperatures will start to cool and onshore
flow will be increasing which will begin a cooling trend in all
areas, but most notable across interior.

The squashed marine layer will again lead to areas of dense fog
for coastal areas. Typical gusty winds are expected in the AV each
evening. And some low end Sundowner winds are expected Sunday
evening.

.LONG TERM (WED-SAT)...09/221 PM.

The cooling trend will continue through next week as an
unseasonably cold upper low moves into BC. There remains quite a
bit of spread in the models for this time period but some of the
ensemble solutions show 500mb heights as low as 560dam across
northern WA. In any case, below normal temperatures are expected
in most areas by Thursday. And by next weekend temperatures are
expected to be as much as 10 degrees below normal with highs only
in the 80s in the warmest valleys. Low clouds and fog are expected
to push well into the valleys each night and some beaches may
stay cloudy much of the day.

&&

.AVIATION...10/0653Z.

At 0636Z at KLAX, the marine layer was 1100 ft deep. The top of
the inversion was at 2200 ft with a temperature of 28 C.

Smoke from nearby wildfires may cause reduced vis at times,
especially KSBP, KSBA, and KPRB.

Otherwise, high confidence in VFR TAFs at KPRB, KBUR, KVNY, KPMD,
and KWJF.

Low to moderate confidence in forecast for the remaining
airfields, with reduced confidence due to timing of flight
category changes potentially being off by +/- 2 hours. Expecting
LIFR-IFR cigs/vsbys overnight into Sun morning for the coastal
airfields, with the highest chance of VSBY down to 1/2SM at KSMX
and KOXR. CIGs could linger at the immediate coastal sites south
of Point Conception through the afternoon, with a 30% chance of no
VFR transitions.

KLAX...Moderate confidence in TAF through 01Z Monday, then low
confidence. Timing of flight cat changes could be off by +/- 2
hours. There is a 30% chance of no VFR transitions through the
period. If CIGs do clear, rearrival of low clouds could occur as
early as 02Z Monday or as late as 12Z Mon. Any east wind
component should remain below 7 kts.

KBUR...High confidence in TAF.

&&

.MARINE...09/720 PM.

For the outer waters, generally high confidence in the current
forecast. In the northern zone (PZZ670), conds will generally be
below Small Craft Advisory (SCA) levels through Thursday night,
altho there is a 20% chance of SCA level wind gusts at times
during the afternoon and evening hours starting Monday. For the
outer waters south of Point Sal, there is a 20% chance of SCA
level wind gusts this afternoon and evening, then a 50%-60% chance
of SCA wind gusts at times mainly from Sunday afternoon through
Thursday night.

For the inner waters north of Point Sal, generally high
confidence in the current forecast with winds and seas expected
to remain below SCA levels through Thursday night.

For the inner waters south of Point Conception, generally moderate
confidence. Across the SBA Channel, local SCA wind gusts are
possible, mainly western portions through this evening. Then
there is a 40%-50% chance of SCA wind gusts at at times, mainly
afternoons and evenings Sunday through Thursday especially western
portions. Over the southern inner waters (PZZ655), there is a
20%-30% chance of SCA wind gusts late this afternoon into this
evening around Point Dume and into the San Pedro Channel,
otherwise conds are expected to be below SCA levels through
Thursday night.

In addition, night to morning dense fog may continue at times
into early next week.

&&

.LOX WATCHES/WARNINGS/ADVISORIES...
CA...NONE.
PZ...Small Craft Advisory in effect from 2 PM Sunday to 3 AM PDT
      Monday for zone 650. (See LAXMWWLOX).

&&

$$

PUBLIC...MW/Sirard
AVIATION...Lund
MARINE...Sirard/Ciliberti
SYNOPSIS...Hall/CC

weather.gov/losangeles

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