376
FXUS66 KLOX 240418
AFDLOX
AREA FORECAST DISCUSSION...UPDATED
NATIONAL WEATHER SERVICE LOS ANGELES/OXNARD CA
918 PM PDT TUE JUN 23 2026
SYNOPSIS
23/1239 PM.
A SHALLOWER MARINE LAYER IS EXPECTED OVER THE NEXT FEW DAYS.
WARM WEATHER WILL PEAK ON WEDNESDAY AND CONTINUE INTO THURSDAY.
A PUSH OF MOISTURE TODAY WILL BRING A LOW CHANCE OF A SHOWER OR
AN ISOLATED STORM FROM VENTURA COUNTY EASTWARD. THIS MOISTURE WILL
LINGER INTO WEDNESDAY MORNING. A COOLING TREND WITH TEMPERATURES
BELOW NORMAL IS EXPECTED FRIDAY INTO THE WEEKEND.
SHORT TERM (TUE-FRI)
23/912 PM.
***UPDATE***
SCATTERED AND ELEVATED CONVECTIVE CELLS MOVED ACROSS EASTERN AND
NORTHERN PARTS OF LOS ANGLES COUNTY THIS AFTERNOON AND EVENING BUT
VERY LITTLE RAIN WAS RECORDED AT THE SURFACE. MOST PRECIPITATION
LIKELY FELL AS VIRGA. VERY SMALL (5%) CHANCE OF SHOWERS WILL
CONTINUE INTO WEDNESAY MORNING AS THE MOISTURE LINGERS IN THE
AREA. THERE ALSO REMAINS A NON-ZERO CHANCE OF FIRE STARTS FROM DRY
LIGHTNING WITH STORMS BUT THE PERIOD WITH THE HIGHEST CHANCES OF
CONVECTION HAS ALREADY PAST.
***FROM PREVIOUS DISCUSSION***
A 592 DM RIDGE IS CURRENTLY SITUATED OVER SOCAL. THIS RIDGING IS
EXPECTED THROUGH WEDNESDAY BEFORE BREAKING DOWN TO ZONAL FLOW ON
THURSDAY WITH SIGNIFICANT COOLING BY FRIDAY.
HEAT ADVISORIES ARE IN EFFECT THROUGH THURSDAY EVENING ACROSS LA
COUNTY. TEMPERATURES ARE EXPECTED TO BE WARMEST TUESDAY (TODAY)
AND WEDNESDAY. FEELS-LIKE TEMPS WILL BE HIGHER DUE TO HUMIDITY.
REFER TO NPWLOX FOR MORE DETAILS.
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. SUNDOWNER POTENTIAL INCREASES ON FRIDAY,
WITH LIKELY ADVISORY LEVEL WINDS ESPECIALLY ON SATURDAY.
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.
LONG TERM (SAT-TUE)
23/120 PM.
AN UPPER TROUGH WILL STRENGTHEN AND DIVE INTO THE GREAT
BASIN THROUGH THE WEEKEND. AS A RESULT, CYCLONIC FLOW WILL
DEVELOP OVER THE REGION. MODERATE TO STRONG ONSHORE FLOW
TO THE EAST IS EXPECTED. A BIT WEAKER TO THE NORTH. ECWMF
GUIDANCE SUGGEST A SHORT-LIVED (SATURDAY & SUNDAY) REDUCTION
IN ONSHORE FLOW TO THE NORTH FOLLOWED BY RETURNING MODERATE
ONSHORE PUSH. THE GENERAL PATTERN IS EXPECTED TO PERSIST THRU
THE END OF THE FORECAST PERIOD.
COOLING TREND IS EXPECTED THROUGH SATURDAY OR SUNDAY DEPENDING ON
LOCATION. MOST PRONOUNCED ON SATURDAY (5 TO 10 DEGREES) ESPECIALLY
ACROSS INTERIOR AREAS AWAY FROM MARINE LAYER INFLUENCE.
TEMPERATURES ARE LIKELY TO REMAIN FAIRLY SIMILAR THEREAFTER THRU
TUESDAY. JUNE GLOOM CONDITIONS ARE EXPECTED ACROSS THE COASTS AND
MANY OF THE VALLEYS.
GUSTY SW-W WINDS NEAR ADVISORY LEVELS ARE LIKELY SATURDAY AND
POSSIBLE SUNDAY ACROSS THE ANTELOPE VALLEY AND I-5 CORRIDOR (NW-W).
WINDS WILL REMAIN GUSTY BUT WILL DECREASE SOME MONDAY AND TUESDAY.
BUT ESPECIALLY ACROSS THE I-5 CORRIDOR AS THE LAX-BFL GRADIENT
INCREASES BY A FEW MILLIBARS. AS MENTIONED IN THE SHORT-TERM,
SUNDOWNERS WILL PEAK ON SATURDAY (ADVISORY LIKELY). ADVISORY LEVEL
WINDS COULD LINGER INTO SUNDAY. SUNDOWNERS WILL CONTINUE THROUGH
MID-WEEK BUT FOR NOW LOOK MOSTLY BELOW ADVISORY LEVELS. THESE
WINDS WILL BE FOCUSED ACROSS WESTERN SANTA YNEZ RANGE.
AVIATION
24/0228Z.
AT 2117Z AT KLAX, THE MARINE LAYER WAS 700 FEET DEEP. THE TOP OF
THE INVERSION WAS 2900 FEET WITH A TEMPERATURE OF 22 C.
HIGH CONFIDENCE IN TAFS FOR KPMD & KWJF.
MODERATE TO LOW CONFIDENCE IN THE REMAINDER OF TAFS. TIMING OF
CIG/VSBY RESTRICTIONS MAY BE DELAYED BY UP TO 2 HOURS AND CIG HGT
BY +/- 200 FT. LOW CONFIDENCE IN CIGS REACHING KBUR AND KVNY,
THERE IS A 40% CHANCE VFR CONDITIONS PERSIST.
KLAX...MODERATE CONFIDENCE IN TAF. TIMING OF FLIGHT CATEGORY
CHANGES COULD BE +/- 2 HOURS OF CURRENT FORECASTS. NO SIGNIFICANT
EAST WIND COMPONENT IS EXPECTED.
KBUR...MODERATE CONFIDENCE IN TAF. THERE IS A 40% CHANCE OF
VFR CIGS OVERNIGHT THROUGH 16Z.
MARINE
23/916 PM.
HIGH CONFIDENCE IN WINDS AND SEAS REMAINING BELOW SMALL
CRAFT ADVISORY (SCA) LEVELS THROUGH WEDNESDAY. LOCAL GUSTS COULD
REACH 21 KTS NEAR POINT CONCEPTION AND ACROSS THE WESTERN SANTA
BARBARA CHANNEL WEDNESDAY EVENING. CHANCES FOR SCA CRITERIA GUSTS
INCREASE THURSDAY EVENING. PROBABILITIES INCREASE THURSDAY
EVENING INTO FRIDAY MORNING TO 30-60% FOR PZZ670/673. CHANCES
EXPAND AND INCREASE FRIDAY AFTERNOON TO THE INNER WATERS
PZZ645/650 AND OUTER WATERS PZZ676. SCA CONDITIONS ARE POSSIBLE
THROUGH THE WEEKEND AS A TROUGH CONTINUES TO MOVE OVER THE REGION.
LOX WATCHES/WARNINGS/ADVISORIES
CA...HEAT ADVISORY REMAINS IN EFFECT UNTIL 9 PM PDT THURSDAY FOR
ZONES 88-368-372-373-379-380-548. (SEE LAXNPWLOX).
PZ...NONE.
PUBLIC...BLACK/SCHOENFELD
AVIATION...PHILLIPS/BATZ
MARINE...BATZ
SYNOPSIS...BLACK
WEATHER.GOV/LOSANGELES
EXPERIMENTAL GRAPHICAL HAZARDOUS WEATHER OUTLOOK AT:
HTTPS://WWW.WEATHER.GOV/ERH/GHWO?WFO=LOX
CLICK HERE TO GO TO PREVIOUS BULLETINS.
Main Text Page