237
FXUS66 KLOX 051908
AFDLOX
AREA FORECAST DISCUSSION...UPDATED
NATIONAL WEATHER SERVICE LOS ANGELES/OXNARD CA
1208 PM PDT WED AUG 5 2026
UPDATED AVIATION DISCUSSION
SYNOPSIS
05/1201 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-FRI)
05/938 AM.
***UPDATE***
THE FORECAST IS WELL ON-TRACK, AND NO CHANGES HAVE BEEN MADE TO
THE ONGOING FORECAST.
***FROM PREVIOUS DISCUSSION***
NOT MUCH SYNOPTIC CHANGE AT ALL OVER THE NEXT THREE DAYS A 595
DAM UPPER HIGH WILL SIT OVER AZ 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 1400 FT AND NIGHT THROUGH MORNING
LOW CLOUDS AND FOG WILL AFFECT NOT ONLY THE CSTS BUT ALSO SOME OF
THE LOWER COASTAL VLYS EACH DAY. SOME NEARSHORE AREAS WILL SEE
SLOW CLEARING IN THE AFTERNOON DUE TO THE STRONG ONSHORE TO THE
EAST.
THERE WILL BE A SLOW WARMING TREND THROUGH THE PERIOD AND BY
FRIDAY MOST MAX TEMPS WILL BE 4 TO 8 DEGREES OVER NORMAL. LOWER
CONFIDENCE IN THE WARMING TREND FOR THE COASTS AND THE ONSHORE
FLOW AND MARINE LAYER COULD EASILY DEFEAT ANY OTHER WARMING
EFFECTS. WHILE ALL AREAS WILL HAVE ABOVE NORMAL TEMPS ONLY THE
INTERIOR SECTIONS WILL BE WARM ENOUGH TO SUPPORT HEAT WARNINGS AND
ADVISORIES, WHICH RUN THROUGH THE PERIOD AND INTO THE XTND PERIODS
AS WELL.
ONE MORE THING WILL BE THE INCREASE IN HUMIDITY AS MONSOON
MOISTURE MOVE IN UNDER THE UPPER HIGH AND INTO SRN CA. THE
INCREASED HUMIDITIES WILL MAKE THE DAYTIME HIGHS FEEL WORSE AND
WILL HINDER THE OVERNIGHT COOLING. IT WILL PRODUCE A NON ZERO CHC
OF AFTERNOON CONVECTION OVER THE MTNS, BUT STILL TOO LOW TO
MENTIONING THE FCST.
THE STRONG ONSHORE FLOW IN THE AFTERNOON WILL PRODUCE STRONGER
THAN NORMAL SEA BREEZES AND GUSTY AFTERNOON WINDS IN THE INTERIOR.
THE GUSTY WINDS IN THE INTERIOR IN COMBINATION WITH THE HOT AND
DRY CONDITIONS WILL PRODUCE ELEVATED FIRE WEATHER CONDITIONS.
LONG TERM (SAT-TUE)
05/232 AM.
THE PATTERN WILL REMAIN THE SAME SATURDAY AND SUNDAY. MAX TEMPS
WILL REMAIN 4 TO 8 DEGREES ABOVE NORMAL, MIN TEMPS WILL REMAIN 3
TO 6 DEGREES ABOVE NORMAL AND HUMIDITIES WILL ALSO BE ABOVE
NORMAL. THIS WILL CONTINUE THE DANGEROUS HEAT EFFECTS AND HEAT
WARNINGS (AND VERY LIKELY HEAT ADVISORIES FOR MANY NON COASTAL
AREAS) ARE CURRENTLY IN EFFECT THROUGH SATURDAY EVENING WITH A 40
PERCENT CHC OF AN EXTENSION INTO SUNDAY.
THE AREA WILL CONTINUE TO BE ON THE WESTERN EDGE OF THE MONSOON
WITH A 5-10 PERCENT CHANCE OF SHOWERS OR THUNDERSTORMS AGAIN
FOCUSED ACROSS INTERIOR LOS ANGELES COUNTY MOUNTAINS AND DESERTS.
THE RIDGE BEGINS TO BREAK DOWN ON MONDAY AND CONTINUES INTO
TUESDAY. THIS SHOULD LEAD TO 2 DAYS OF COOLING AND AN ELIMINATION
OF THE NEED FOR HEAT PRODUCTS.
AVIATION
05/1907Z.
AT 1900Z AT KLAX, THE MARINE LAYER WAS 1600 FEET DEEP. THE TOP OF
THE INVERSION WAS NEAR 5800 FEET WITH A TEMP OF 25 C.
HIGH CONFIDENCE IN VFR CONDS FOR KPMD AND KWJF.
GOOD CONFIDENCE IN TAFS FOR KPRB, KBUR, AND KVNY WITH A 15 TO 20
PERCENT CHC OF IFR CIGS 13Z-15Z.
MODERATE CONFIDENCE IN THE REMAINDER OF THE TAFS WHERE CIGS COULD
BE OFF BY +/- 200 FT. VFR CONDS COULD ARRIVE UP TO 90 MINUTES
LATER THAN FCST.
KLAX...MODERATE CONFIDENCE IN TAF. THERE IS A 30 PERCENT CHC THAT
CIGS REMAIN AOA 010. VFR TRANSITION COULD BE AS LATE AS 1930Z
THURSDAY. NO SIGNIFICANT EAST WIND COMPONENT EXPECTED.
KBUR...HIGH CONFIDENCE IN TAF. THERE IS ONLY A 15 PERCENT CHC OF
BKN006 CONDS 13Z-16Z.
MARINE
05/237 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
AROUND AND TO THE SOUTH OF 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 SUNDAY FOR
ZONES 38-377-381>383. (SEE LAXNPWLOX).
HEAT ADVISORY IN EFFECT UNTIL 8 PM PDT SUNDAY FOR ZONES
344-345-353-375-376-378>380. (SEE LAXNPWLOX).
PZ...NONE.
PUBLIC...RORKE/COHEN
AVIATION...RORKE/COHEN
MARINE...KL/RS
SYNOPSIS...MW
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