Temple City, California 7 Day Weather Forecast

Wx Forecast - Wx Discussion - Wx Aviation

066
FXUS66 KLOX 060535
AFDLOX

Area Forecast Discussion...UPDATED
National Weather Service Los Angeles/Oxnard CA
1035 PM PDT Mon May 5 2025

.SYNOPSIS...05/748 PM.

A low pressure system just east of the area will bring continued
cool conditions to Southwest California through Tuesday, with a
few showers and gusty desert winds. High pressure aloft will
result in warmer conditions Wednesday through at least Sunday.

&&

.SHORT TERM (MON-THU)...05/810 PM.

***UPDATE***

An upper closed low over Arizona will continue to move east
through the next 24 hours, as another weak low swings south from
Idaho over the Great Basin. This low will maintain a small chance
of showers over the northern Ventura and San Gabriel mountains
Tuesday afternoon and evening but with little or no accumulation
expected. Otherwise, weather issues for the overnight period
include gusty desert winds between 35 to 45 mph in the Antelope
Valley, and extensive marine layer clouds. Low clouds are expected
to proceed well inland tonight, reaching the interior valleys and
coastal mountain slopes. Some drizzle or light rain cannot be
ruled out as the marine layer moves inland over LA and Ventura
Counties. On Tuesday, below normal temperatures will continue with
highs in the 60s near the coast and low 70s to near 80 inland.

***From Previous Discussion***

The low pressure system that brought periods of rain over the
last few days continues its slow progress to the east, and is now
centered over Arizona. The wrap-around moisture that brought some
showers this morning is weakening and sliding to the east with the
low. There remains enough instability however to keep afternoon
and evening shower chances going today for the LA and Ventura
County mountains, and possibly to a lesser extent on Tuesday as
weak disturbance wobbles around the main low.

Other than that, fairly benign weather will continue through
Tuesday, with smatterings of stubborn low clouds as the marine
inversion recovers from the cold air intrusion over the past
weekend. Temperatures will remain 5-10 degrees below normal, with
highs in the mid 60s to lower 70s common.

High pressure aloft over the eastern Pacific will start to nose
into California on Wednesday, and then settle over the southwest
on Thursday. This will warm the airmass significantly, while
weakening the onshore flow. This should add up to a healthy warm
up, with highs in the 80s common by Thursday and even more warming
to follow. The marine layer should also shrink quite a bit, but
not seeing much of a reason to think it will completely go away,
which means the coastal areas will warm but only a little.

.LONG TERM (FRI-MON)...05/129 PM.

With high pressure aloft peaking and onshore flow remaining weak,
the warming from Wednesday and Thursday will likely continue to
trend up Friday and possibly Saturday before leveling off. The
current forecast is admittedly on the conservative side, with
highs inland of the coast in the mid 80s to lower 90s. Looking at
the raw ensemble projections, there is room to go even higher,
with a number of projections approaching 100 in the hottest
locations. At this point, Heat Advisories are not expected, but if
the warmer solutions pan out, Heat Advisories will be in play for
the hottest valleys (20% chance). The coastal areas will be the
trickiest, as it all depends on how the marine layer responds.
Being the famous May Gray season with the absence of any
significant offshore flow, it is hard to believe that the marine
layer will completely go away. As a result, expect there to be a
sharp gradient in temperatures from the mild beaches to the warm
valleys.

The one wrinkle in this general story involves a very weak upper
level low rippling through the high on Friday, which a handful of
projections show. This would bring a little bit of instability
leading to some afternoon cumulus or even a shower or two. The
most likely scenario is for nothing to happen, but the potential
is worth noting at this point. Regardless, it will remain warm.

A low pressure system will move into the Pacific Northwest early
next week, but there is a huge spread in the ensembles for our
area in terms of timing and how far down it goes. To put this into
perspective, the raw range of 500 millibar height outcomes for
Monday is between 560 and 590 decameters. The majority of the
solutions however trend down, which means temperatures will likely
be lowering and the marine layer will likely be deepening. To
what degree and how fast is still to be determined. Wind and small
rain concerns will ramp up Tuesday or Wednesday.

&&

.AVIATION...06/0534Z.

At 0501Z at KLAX, the marine layer was around 3500 ft deep. The
top of the weak inversion was around 5000 ft with a temperature
of 12 C.

High confidence in TAFs for KPMD and KWJF.

Moderate confidence in remaining TAFs. High confidence in
widespread low clouds across all coastal sites, with moderate
confidence in cigs reaching KPRB. There is a chance for IFR conds
at KSBP (20%) and KPRB (40%) tonight. There is a 40% chance KSMX
remains MVFR. Otherwise, MVFR cigs are most likely, but periods
of IFR may occur at any point. Low confidence in transition to
VFR for all sites, especially south of Point Conception. Low
confidence in arrival time of MVFR cigs Tuesday night (+/- 4
hours).

KLAX...Moderate confidence in TAF. Cigs BKN015-025 may SCT at
times overnight. There is a 30% chance cigs remain MVFR through
the period and do not SCT Tuesday. If cigs do SCT, arrival time of
MVFR cigs may be off by +/- 3 hours. There is a 20% chance of an
east wind component reaching 8 kts between 10Z and 16Z.

KBUR...Moderate confidence in TAF. There is a 10% chance for MVFR
conds to prevail through the period with no clearing.

&&

.MARINE...05/935 PM.

Some local areas of large, steep, Small Craft Advisory (SCA) seas
are lingering over the outer waters north of Point Sal, but are
expected to fall below SCA criteria overnight.

Thereafter, conditions are expected to remain below SCA criteria
through Wednesday afternoon. Although, there is a 30% chance of
Southerly SCA wind gusts nearshore from Point Arguello to southern
portions of PZZ645 (just north of Point Sal) on Tuesday. From
Thursday into the weekend, expect increasing chances for widespread
SCA winds across the Outer Waters. Also, seas are expected to
build near SCA levels this weekend.

&&

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

&&

$$

PUBLIC...Kittell/Ciliberti
AVIATION...Lewis
MARINE...Phillips/Black
SYNOPSIS...RK/CC

weather.gov/losangeles

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