221
FXUS66 KLOX 250409
AFDLOX

Area Forecast Discussion
National Weather Service Los Angeles/Oxnard CA
909 PM PDT Wed Jun 24 2026

.SYNOPSIS...24/909 PM.

Marine layer clouds with patchy fog will reoccur each night from
the coasts to the coastal valleys, expanding into the valleys
into this weekend. Temperatures will trend cooler, with below
normal temperatures for Friday into the weekend.

&&

.SHORT TERM (WED-SAT)...24/908 PM.

***UPDATE***

Heights peaked today around 590 DAM, and high temperatures
although warm, were not quite as hot as expected with 80s to low
90s common for many valleys and mid to upper 90s for far interior
areas. Marine layer clouds this morning continued to push near the
coastal valleys, especially along the Central Coast, helping to
limit warming. With ongoing solid onshore flow and falling
heights, temperatures will trend cooler into the weekend with a
deepening marine layer. Light drizzle overnight cannot be ruled
out as well. Temperatures were cooled Thursday and Friday, more in
line with the marine layer and expected trends. Given the cooler
solution for Thursday, the Heat Advisory for the LA County valleys
has been expired.

***From Previous Discussion***

A 590 dm ridge is currently situated over Socal. This ridging is
expected to break down on Thursday and will be replaced with zonal
to cyclonic flow as another trough develops over PACNW and dives
into the Great Basin through the weekend.

Onshore flow will strengthen to the north through Thursday and
to the east through Saturday. This will result in gusty SW winds
across the interior - strongest across the Antelope Valley/ft
hills and portions of LA county mtns. Approaching advisory levels
Thursday into Friday, and even better chances into the weekend.
Advisory level Sundowner winds likely on Friday, and especially
on Saturday. Focused across western Santa Ynez range.

With increasing onshore flow, decreasing 500 mb heights, and
increasing potential for Catalina Eddy (throughout the week) this
will result in the continuation of marine layer stratus across the
coasts and valleys.

Temperatures are expected to be warmest today and a couple degrees
cooler tomorrow (still warm/hot). Then, a noticeable cooling trend
Friday into the weekend.

Important: Have adjusted the Heat advisory end time to 9 PM Wednesday
for zone 368 - Los Angeles Inland Coast including Downtown. All other
zones are still under a heat advisory through 9 PM Thursday. See NPWLOX
for more details.

.LONG TERM (SUN-WED)...24/1245 PM.

June Gloom will be back with a vengeance during the xtnd period.
By Sunday, an unseasonably cold upper low will be situated over
the Great Basin region. This main low will lift to the NE on
Monday. In Tandem, a shortwave will drop south on the backside
and will maintain troughing over the west coast. There is some
uncertainty in how far south the energy dives.

Chances for advisory level winds linger into Sunday across the
Antelope Valley/adjacent foothills and I-5 corridor. Lower
confidence beyond due to uncertainty in upper pattern and sfc
pressure gradients.

At least moderate onshore flow to the north and east is expected
to continue Monday through Wednesday. Look for plenty of night
through morning low clouds across the csts/vlys every day.
Clearing will be on the slow side and a few beaches will remain
cloudy in the afternoon. Portions of the SBA south coast may be
the exception as local north flow indicated by the KSBA-KSMX
gradients may keep the low clouds away or to a lesser extent.

Temperatures are likely to remain below normal through end of fcst
period. Max temps will mostly be in the 70s across the csts/vlys
(mid to upper 60s at the beaches) and only lower to mid 80s for
the inland areas. These max temps are 3 to 5 degrees cooler than
normal at the csts and 5 to 10 locally 12 below normal across the
vlys and inland areas.

&&

.AVIATION...25/0350Z.

At 0326Z at KLAX, the marine layer was 1000 feet deep. The top of
the inversion was 3400 feet with a temperature of 22 C.

High confidence in TAFs for KPMD & KWJF.

Moderate to high confidence in the KPRB TAF. There is a 10% chance
for IFR CIGs tonight.

Moderate confidence in the remainder of the TAFs. Timing of
CIG/VSBY restrictions could be +/- 2 hours of current forecast.

KLAX...Moderate confidence in TAF. MVFR CIGs expected to persist
overnight with increasing chances for IFR CIGs after 06Z.

KBUR...Low to moderate confidence in TAF. Similar probability of
30-40% for MVFR/IFR CIGs for a short period tonight, most likely
between 08-15Z.

&&

.MARINE...24/155 PM.

High confidence in winds and seas remaining below Small Craft
Advisory (SCA) levels through today. Local gusts could reach 21
kts near Point Conception and across the western Santa Barbara
Channel later this afternoon into the evening. Chances for SCA
criteria gusts increase Thursday evening across the northern
waters and will expand to the south Friday into the weekend.
SCA winds will be strongest on Saturday, and will reach into the
nearshore waters along the Central Coast and Santa Barbara Channel
at times. Seas will near 10 ft Saturday evening through Monday
morning. Thereafter, conditions look to quiet down a bit through
mid next week.

&&

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

&&

$$

PUBLIC...Phillips/Black
AVIATION...Batz
MARINE...Black/RS
SYNOPSIS...Phillips

weather.gov/losangeles

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

NWS Los Angeles (LOX) Office