South Pasadena, California 7 Day Weather Forecast

Wx Forecast - Wx Discussion - Wx Aviation

110
FXUS66 KLOX 061645
AFDLOX

Area Forecast Discussion
National Weather Service Los Angeles/Oxnard CA
845 AM PST Sat Dec 6 2025

.SYNOPSIS...05/441 PM.

Light offshore winds will weaken through tonight. Benign weather
will continue through the weekend with a low chance of morning
coastal low clouds and fog. A significant warming trend will
begin Sunday with temperatures well above normal Monday through
next Friday, peaking Tuesday through Thursday. Offshore winds will
increase Sunday and Monday and continue into much of the week.

&&

.SHORT TERM (TDY-MON)...06/814 AM.

***UPDATE***

Pretty quiet weather this morning with clear skies and no marine
layer present. Surface observations show a few gusty ridgetops
across the Santa Lucia, Sierra Madre, and La Panza ranges (20 to
30 mph). Winds will increase some this afternoon and evening
across these locations, but should remain below advisory levels.
There is a low to moderate chance for a return of a very shallow
marine layer along the coasts south of point conception tonight
through Sunday morning (mainly Ventura & LA coast). Dense fog is
possible. Confidence is low on coverage if occurs. Maximum Temps
will warm a few to several degrees (esp. across coasts & valleys)
through Monday. By Monday, most areas will be 8 to 12 degrees
above normal. East-west offshore gradients will result in gusty
sub-advisory winds across the Santa Lucia and La Panza ranges
through Monday. ECMWF guidance suggests LAX-DAG gradients peak
around -4 mb Monday afternoon. The Santa Susana mountains will
likely have the best chance for a borderline wind advisory as
guidance currently depicts.

***From Previous Discussion***

A Chamber of Commerce weekend is on tap for Srn CA. A ridge
poking in from the west bringing hgts around 582 dam. Weak
offshore flow should keep the low clouds away, but there is about
a 10 percent chc that the LA south coast and SBA county west coast
will see some morning low clouds and dense fog. There may be some
local canyon winds in the morning, but nothing near advisory
levels.

Max temps will be the main talking point. Weaker offshore flow
this morning will bring some cooling to the VTA/LA csts and vlys.
But the rest of the area will see warming esp the Antelope Vly
where the lack of cool air advection will bring 8 to 10 degrees of
warming. On Sunday, sunny skies, higher than normal hgts and the
offshore flow will all combine to bring 3 to 6 degrees of warming
to the csts/vly S of Pt Conception and 1 to 2 degrees of warming
elsewhere. Sunday`s max temps will be 3 to 5 degrees above normal
at the csts and 5 to 10 degrees inland.

Stronger offshore flow will bring 20 to 25 mph canyon gusts to
some areas in the morning. Hgts rise to 584 dam and this along
with the better offshore flow will allow max temps to rise 3 to 6
degrees to the csts/vly S of Pt Conception and 1 to 2 elsewhere.
This warming will bring some max temps up into the lower 80s in
the warmest LA/VTA vly areas. Most areas away from the coast will
end up 10 to 12 degrees above normal.

.LONG TERM (TUE-FRI)...06/255 AM.

The GFS has now trended towards the warmer EC solution and it
seems pretty certain that all of next week will be a very warm
one. Upper level high pressure will sit atop of the state and hgts
will vary between 584 dam and 586 dam. These hgts are about 15 dam
higher than the normal value of 571 dam. Offshore flow will
continue through the period with a peak on Tuesday.

Cannot rule out some morning low clouds in the LGB-LAX area on any
given morning but right now it looks like the chance of this
happening is under 50 percent.

There will be some canyon winds but the only chance of advisory
level gusts will be Tuesday morning and they will be more from the
north than the NE.

Max temps will be the name of the game for the entire week.
Coastal temperatures will vary the most heating or cooling
depending on the sfc gradient trends. The current thinking for
coastal temps is for for a 3 to 5 degree rise on Tuesday bring max
temps into the mid 70s to lower 80s (lower 70s right at the
beaches). A degree or two of cooling each day Wed and Thu will
bring the temps down into the upper 60s and 70s. Most coastal max
temps S of Pt Conception will be 4 to 8 degrees above normal. The
Central Coast will exceed that with temps coming 10 to 15 degrees
over normal. The interior will see two days of warming Tue and Wed
and then little change Thu and Fri. People can expect to see 80s
in the vlys (with a 30 to 40 percent chc of some lower 90s). The
lower elevations of the mtns and all of the far interior will have
max temps in the 70s. These max temps are 12 to 18 locally 20 degrees
above normal.

Looking further ahead it appears that there will be some cooling
next weekend but max temps will remain well above normal.

&&

.AVIATION...06/1645Z.

At 1630Z at KLAX, there was a surface-based inversion. The top
of the inversion was 2400 feet with a temperature of 17 degrees
Celsius.

Overall, moderate to high confidence in 18Z TAF package. Through
this evening, high confidence in CAVU conditions for all sites.
For late tonight/Sunday morning, there is a 30% chance of CIG/VSBY
restrictions at KSMO, KLAX and KLGB.

KLAX...Overall, moderate to high confidence in 18Z TAF. Through
this evening, high confidence in CAVU conditions. From 10Z-17Z,
there is a 30% chance of LIFR/VLIFR conditions. No significant
easterly wind component is expected.

KBUR...High confidence in 18Z TAF as CAVU conditions are expected
through the period.

&&

.MARINE...06/717 AM.

For the waters southwest through northwest of the Channel Islands
beyond 10 NM offshore of the Central Coast, low-end Small Craft
Advisory conditions expected at times through much of next week,
especially across the north and western portions of PZZ670/673
during the afternoon and evening hours.

Inside the southern California bight, high chance of winds and
seas remaining below SCA levels through Monday night. Moderate
chance of offshore winds from Ventura through Santa Monica through
Tuesday afternoon. Guidance suggests winds and seas should remain
below SCA levels thereafter through the work week.

There is a moderate chance of dense fog over the coastal waters
tonight through tomorrow. Likely south of Point Conception.
Confidence remains low on timing and coverage.
AVDAFDLOX
&&

.LOX WATCHES/WARNINGS/ADVISORIES...
CA...Beach Hazards Statement in effect until 11 AM PST this
      morning for zones 87-349-350-354-362-366. (See LAXCFWLOX).
PZ...Small Craft Advisory in effect until 3 AM PST Monday for
      zones 670-673. (See LAXMWWLOX).

&&

$$

PUBLIC...Rorke/Black
AVIATION...RAT
MARINE...Black
SYNOPSIS...Lewis/CMC

weather.gov/losangeles

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