493
FXUS66 KLOX 181746 AAA
AFDLOX
AREA FORECAST DISCUSSION...UPDATED
NATIONAL WEATHER SERVICE LOS ANGELES/OXNARD CA
1046 AM PDT FRI SEP 18 2026
UPDATED MARINE AND AVIATION DISCUSSIONS
SYNOPSIS
17/740 PM.
SLIGHT WARMING AND A SHRINKING MARINE LAYER ARE EXPECTED FRIDAY
INTO THE WEEKEND. TEMPERATURES WILL COOL BY A FEW DEGREES SUNDAY
AND MONDAY, THEN ANOTHER GRADUAL WARMING TREND IS LIKELY THROUGH
AT LEAST THE MIDDLE OF NEXT WEEK.
SHORT TERM (TDY-SUN)
18/142 AM.
FAIRLY BENIGN CONDITIONS EXPECTED THROUGH THE WEEKEND. NO HAZARD
PRODUCTS EXPECTED. WARMEST ON SATURDAY, PUSHING CLOSE TO 90S FOR
SOME VALLEY LOCATIONS ESPECIALLY SALINAS AND ANTELOPE VALLEYS.
MARINE LAYER STRATUS MAY RETURN TO PORTIONS OF THE LA BASIN ON
SAT, AND MORE LIKELY ON SUNDAY. THERE IS POTENTIAL OF AM CLOUDS
REACHING INTO SAN GABRIEL/SAN FERNANDO VALLEYS ON SUNDAY.
LONG TERM (MON-THU)
18/214 AM.
A SMALL TROUGH MOVES INTO THE AREA LATE SUNDAY INTO MONDAY.
INTERESTINGLY ENOUGH, THIS FEATURE IS MOSTLY EXPECTED TO
MOVE EASTWARD FOLLOWING THE UPPER LEVEL FLOW, BUT A WEAKER
PORTION IS EXPECTED TO SPLIT AND BECOME STATIONARY, CENTERING
ITSELF OVER THE INNER COASTAL WATERS BY MID-WEEK. THIS PUTS
LA/VTA COUNTIES IN A RELATIVELY FAVORABLE POSITION FOR THE INFLUX
OF MOISTURE AND INSTABILITY. HOWEVER, CONFIDENCE IS LOW IF THESE
PARAMETERS ALONG WITH LIFT WILL BE SUFFICIENT ENOUGH FOR EVEN A
SLIGHT MENTION OF SHOWERS AND THUNDERSTORMS ACROSS THE AREA.
DETAILS AT THIS TIME ARE BLURRY, BUT THE WEAK SIGNAL IS STRONGEST
ACROSS TYPICALLY FAVORED MOUNTAIN AREAS THIS TIME OF YEAR.
TEMPERATURES WILL WARM SOME ACROSS THE AREA, AND HUMIDITY WILL
INCREASE SOME OVER THE LA BASIN.
AVIATION
18/1745Z.
AT 1700Z AT KLAX, THE MARINE LAYER WAS 3700 FT DEEP. THE TOP OF
THE INVERSION WAS AT 5100 FT WITH A TEMPERATURE OF 16 C.
HIGH CONFIDENCE IN VFR TAFS FOR KPRB, KBUR, KVNY, KPMD & KWJF.
FOR THE REMAINDER OF THE AIRFIELDS, TIMING OF CIG AND ANY VSBY
RESTRICTIONS MAY BE OFF +/- 2 HRS AND FLIGHT MINIMUMS BY ONE
CATEGORY.
KLAX...MODERATE CONFIDENCE IN TAF. RETURN AND DISSIPATION OF MVFR
CIGS 015 (+/- 300 FT) TONIGHT AND SAT MORNING SHOULD BE ACCURATE
WITHIN +/- 2 HRS OF FCST. NO SIGNIFICANT EAST WIND COMPONENT
EXPECTED.
KBUR...GENERALLY HI CONFIDENCE IN TAF. NO WIND ISSUES EXPECTED.
MARINE
18/847 AM.
GENERALLY HIGH CONFIDENCE IN WIDESPREAD SMALL CRAFT ADVISORY
(SCA) NORTHWEST WINDS ACROSS THE OUTER WATERS AND NEARSHORE WATERS
ALONG THE CENTRAL COAST AT LEAST THROUGH SUNDAY AND POSSIBLY INTO
MONDAY. CHOPPY, SHORT PERIOD SEAS WILL DEVELOP.
ACROSS THE SANTA BARBARA CHANNEL, THERE IS A 30-40% CHANCE OF SCA
WINDS THIS AFTERNOON AND EVENING, THEN A 40-60% CHANCE SATURDAY
AND SUNDAY IN THE AFTERNOON/EVENING HOURS. A 30%-40% CHANCE OF
THESE WINDS WILL LINGER AFTERNOON/EVENING HOURS MONDAY AS WELL.
LOCAL GUSTS NEAR 20 KNOT WILL BE COMMON EACH AFTERNOON AND EVENING
THROUGH THE SAN PEDRO CHANNEL AND SANTA MONICA BAY.
LOX WATCHES/WARNINGS/ADVISORIES
CA...NONE.
PZ...SMALL CRAFT ADVISORY IN EFFECT FROM 3 PM THIS AFTERNOON TO 9
PM PDT THIS EVENING FOR ZONE 645. (SEE LAXMWWLOX).
SMALL CRAFT ADVISORY IN EFFECT UNTIL 3 AM PDT SUNDAY FOR
ZONES 670-673-676. (SEE LAXMWWLOX).
PUBLIC...DB
AVIATION...SIRARD
MARINE...SIRARD
SYNOPSIS...MW/KL
WEATHER.GOV/LOSANGELES
EXPERIMENTAL GRAPHICAL HAZARDOUS WEATHER OUTLOOK AT:
HTTPS://WWW.WEATHER.GOV/ERH/GHWO?WFO=LOX
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