620
FXUS66 KLOX 040934
AFDLOX
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE LOS ANGELES/OXNARD CA
234 AM PDT TUE AUG 4 2026
SYNOPSIS
04/233 AM.
SEASONABLY WARM WEATHER WILL CONTINUE AWAY FROM THE IMMEDIATE
COAST, WHILE FAR INTERIOR AREAS WILL CONTINUE TO BAKE UNDER TRIPLE
DIGIT TEMPERATURES ALL WEEK. ALONG THE COAST LOW CLOUDS AND
LOCALLY DENSE FOG WILL DEVELOP AND COULD LINGER INTO THE AFTERNOON
IN SOME AREAS.
SHORT TERM (TDY-THU)
04/233 AM.
A 597 DAM UPPER HIGH WILL SIT OVER AZ THROUGH THE SHORT TERM WITH
594-595 DAM HGTS OVER SRN CA. THERE WILL BE MDT-STG ONSHORE FLOW
TO THE EAST AND WEAK-MDT ONSHORE FLOW TO THE NORTH. THE MARINE
LAYER WILL BE NEAR 1000 FT AND NIGHT THROUGH MORNING LOW CLOUDS
AND FOG WILL AFFECT THE CSTS EACH DAY. SOME NEARSHORE AREAS WILL
SEE SLOW CLEARING IN THE AFTERNOON DUE TO THE STRONG ONSHORE TO
THE EAST. THE CENTRAL COAST MAY ALSO SEE SOME DENSE FOG AROUND
SUNRISE.
MAX TEMPS WILL BE PRETTY CLOSE TO NORMAL ACROSS THE CSTS AND VLYS.
SINCE IT IS AUGUST "CLOSE TO NORMAL" IN THE VLYS STILL MEANS 90 TO
101 DEGREES AND MID TO UPPER 80S IN THE INLAND CSTL SECTIONS. THE
LOWER MTN ELEVATIONS AND FAR INTERIOR SECTIONS WILL NOT FEEL THE
EFFECTS OF THE ONSHORE FLOW AND MAX TEMPS WILL RANGE FROM 100 TO
109 DEGREES OR 5 TO 10 DEGREES ABOVE NORMAL. HEAT WARNINGS
CONTINUE FOR ANTELOPE VALLEY, CUYAMA VALLEY, AND NORTHERN VENTURA
MOUNTAINS - PLEASE SEE LAXNPWLOX FOR DETAILS.
LONG TERM (FRI-MON)
04/233 AM.
THE UPPER HIGH MOVES TO THE WEST ON FRIDAY AND HGTS BUMP UP TO
596 DAM AND REMAIN THERE THROUGH SATURDAY. AT THE SAME TIME THERE
IS A MONSOON PUSH AND PWS RISE TO ABOUT 1.25 INCHES. MAX TEMPS
WILL ONLY RISE A DEGREE OR TWO, BUT THE INCREASED HUMIDITY WILL
INCREASE THE HEAT RISK AS WELL AS KEEPING THE OVERNIGHT LOWS WELL
ABOVE NORMAL. THE COMBINATION OF WELL ABOVE NORMAL HIGHS AND LOWS
AS WELL AS INCREASED HUMIDITIES WILL BRING HEAT DANGER TO THE FAR
INTERIOR AND LOWER MTN ELEVATIONS. AS A RESULT THE HEAT WARNINGS
FOR THESE AREAS HAVE BEEN XTND THROUGH SATURDAY EVENING. AS THE
WEEKEND APPROACHES A SUITE OF HEAT ADVISORIES WILL LIKELY BE
ISSUED FOR MANY VLY AREAS. THE COASTAL AREAS WILL NOT BE AS WARM
AS THE REST OF THE AREA DUE TO THE ONSHORE FLOW AND MARINE LAYER.
THE ONSHORE FLOW WILL CONTINUE AND THIS WILL KEEP THE NIGHT
THROUGH MORNING LOW CLOUDS GOING THROUGH THE PERIOD. THE VERY HIGH
HGTS WILL KEEP THE MARINE LAYER UNDER A 1000 FT AND THE VLYS WILL
REMAIN CLEAR.
AT THIS TIME THERE IS NO CONVECTION IN THE FCST DESPITE THE
INCREASE IN MONSOON MOISTURE, BUT THIS WILL NEED WATCHING AS THE
WEEK PROGRESSES.
STARTING SUNDAY AND CONTINUING INTO MONDAY THE UPPER HIGH WILL
WEAKEN AND THE ONSHORE FLOW WILL INCREASE TO ALMOST 10 MB ONSHORE
TO THE EAST. MAX TEMPS ARE FORECAST TO COOL 1-2 DEGREES SUNDAY AND
2 TO 4 MORE DEGREES ON MONDAY.
AVIATION
04/0933Z.
AT 0832Z AT KLAX, THE MARINE LAYER WAS 1100 FEET DEEP. THE TOP OF
THE INVERSION WAS NEAR 2100 FEET WITH A TEMP OF 27 C.
HIGH CONFIDENCE IN VFR CONDS FOR KPRB, KBUR, KVNY, KPMD AND KWJF.
THERE IS A 10% CHANCE FOR BRIEF LIFR CONDS AT KPRB/KBUR/KVNY
BETWEEN 12Z AND 15Z.
MODERATE CONFIDENCE WITH THE REMAINING TAFS. VFR TRANSITION COULD
BE UP TO 90 MINUTES LATER THAN FCST. CIG HGTS MAY BE OFF BY +/-
200 FT.
KLAX...MODERATE CONFIDENCE IN TAF. VFR CONDS COULD ARRIVE AS LATE
AS 1930Z. NO SIGNIFICANT EAST WIND COMPONENT EXPECTED.
KBUR...HIGH CONFIDENCE IN TAF. HOWEVER THERE IS A 10% CHANCE FOR
BKN005 CONDS 12Z-15Z.
MARINE
04/234 AM.
WINDS AND SEAS ARE EXPECTED TO REMAIN BELOW SMALL CRAFT ADVISORY
(SCA) CRITERIA THROUGH THE WEEK, WITH THE EXCEPTION OF NORTHWEST
WINDS LOCALLY GUSTING TO 20-25 KNOTS IN TYPICALLY WINDY AREAS NEAR
POINT CONCEPTION EACH AFTERNOON AND EVENING.
DENSE FOG MAY AFFECT PORTIONS OF THE COASTAL WATERS EACH NIGHT
THROUGH MORNING THROUGH MUCH OF THE WEEK, ESPECIALLY ACROSS THE
WATERS NORTH AND WEST OF POINT CONCEPTION.
LOX WATCHES/WARNINGS/ADVISORIES
CA...EXTREME HEAT WARNING IN EFFECT UNTIL 8 PM PDT SATURDAY FOR
ZONES 38-377-381>383. (SEE LAXNPWLOX).
HEAT ADVISORY IN EFFECT UNTIL 8 PM PDT SATURDAY FOR ZONES
344-345-353-375-376-378>380. (SEE LAXNPWLOX).
PZ...NONE.
PUBLIC...RORKE
AVIATION...RORKE
MARINE...LEWIS/KL
SYNOPSIS...MW
WEATHER.GOV/LOSANGELES
EXPERIMENTAL GRAPHICAL HAZARDOUS WEATHER OUTLOOK AT:
HTTPS://WWW.WEATHER.GOV/ERH/GHWO?WFO=LOX
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