776
FXUS66 KLOX 021637
AFDLOX
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE LOS ANGELES/OXNARD CA
937 AM PDT SUN AUG 2 2026
SYNOPSIS
02/1205 AM.
TODAY WILL BE THE HOTTEST DAY OF THE WEEK. STILL, ABOVE NORMAL
TEMPERATURES ARE EXPECTED WELL INTO NEXT WEEK. DENSE FOG WILL
AFFECT SOME COASTAL AREAS.
SHORT TERM (TDY-TUE)
02/936 AM.
***UPDATE***
FOR MOST AREAS YESTERDAY WAS THE PEAK OF THIS CURRENT HEAT WAVE
AND TODAY WILL BEGIN A SLOW COOLING TREND THROUGH TUESDAY.
HOWEVER, FAR INTERIOR AREAS LIKE THE ANTELOPE VALLEY, THE INTERIOR
MOUNTAINS, AND INTERIOR SLO COUNTY WILL CONTINUE TO EXPERIENCE
TRIPLE DIGIT TEMPERATURES, AND IN THE CASE OF THE ANTELOPE VALLEY,
AT OR ABOVE 105 EACH DAY.
ELSEWHERE, A SHALLOW MARINE LAYER HAS RETURNED TO ALL COASTAL
AREAS AND EXPECTING THAT TO CONTINUE AT LEAST THROUGH MID WEEK.
FORECAST GRADIENTS INDICATE A SLOW INCREASE IN ONSHORE FLOW WHICH
WILL BRING A COOLING SEA BREEZE INTO THE VALLEYS A LITTLE EARLIER
AND KNOCKING TEMPS DOWN A LITTLE EACH DAY, THOUGH STILL REMAINING
SLIGHTLY ABOVE NORMAL.
***FROM PREVIOUS DISCUSSION***
ABOVE AVERAGE 594 DAM HGTS WILL CONTINUE MONDAY AND TUESDAY BUT
THE ONSHORE FLOW WILL INCREASE A LITTLE MORE EACH DAY AND THIS
WILL BRING A FEW MORE DEGREES OF COOLING EACH DAY. TODAY'S VLY
TEMPS OF
THE COOLING MAY NOT BE ENOUGH TO GET SOME OF THE INTERIOR
SECTIONS THAT ARE UNDER A HEAT WARNING DOWN UNDER ADVISORY
CRITERIA AND THERE IS A 50 PERCENT CHC THAT HEAT ADVISORIES WILL
BE NEEDED FOR SEVERAL INTERIOR LOCATIONS MONDAY, TUESDAY AND
POSSIBLY WEDNESDAY.
THE INCREASE IN ONSHORE FLOW WILL BRING MORE AND MORE LOW CLOUDS
TO THE COASTS EACH MORNING, BUT THE HIGH PRESSURE ALOFT WILL KEEP
THE MARINE LAYER SMOOSHED ENOUGH TO KEEP THE LOW CLOUDS OUT OF THE
VLYS.
LONG TERM (WED-SAT)
02/305 AM.
NOT MUCH ACTION IN THE XTND FCST. HIGH PRESSURE REMAINS OVER THE
STATE THROUGH THE PERIOD. HGTS REMAIN NEAR 594 DAM WEDNESDAY, BUT
THEN START TO SLOWLY CLIMB AS THE UPPER HIGH STRENGTHENS. HGTS
WILL BE NEAR 598 DAM AGAIN BY FRIDAY OR SATURDAY. MDT-STG ONSHORE
FLOW BOTH TO THE N AND E WILL LIMIT THE WARMING ACROSS THE CSTS
AND SOME LOWER VLYS AND WILL LIKELY BRING SOME CLOUDS EACH MORNING
TO SOME OF THE BEACHES. FURTHER INLAND, HOWEVER, MAX TEMPS WILL
RISE SOME STARTING THURSDAY. THE OFFICIAL BLENDED FCST CALLS FOR
VLY HIGHS OF 90 TO 100 FOR THE VLYS ON FRI/SAT, BUT THESE TEMP MAY
BE A LITTLE LOW AND MAY NEED ADJUSTING OVER THE NEXT FEW DAYS.
SE FLOW ALSO DEVELOPS THU OR FRI AND THIS COULD LEAD TO SOME
MONSOON TRANSPORT. NOTHING IS REALLY INDICATED AT THIS TIME, BUT
THAT CAN EASILY CHANGE GIVEN THIS FLOW DIRECTION.
AVIATION
02/1138Z.
AT 0822Z AT KLAX, THE MARINE LAYER WAS 1200 FT DEEP. THE TOP OF
THE INVERSION WAS NEAR 5300 FEET WITH A TEMP OF 28 DEGREES
CELSIUS.
HIGH CONFIDENCE IN VFR CONDS FOR KPRB, KBUR, KVNY, KPMD AND KWJF.
MODERATE CONFIDENCE IN THE REST OF THE TAFS WHERE VFR TIMING
COULD BE OFF BY +/- 1 TO 2 HOURS AND CIGS HGT OFF BY +/- 200 FT.
KLAX...MODERATE CONFIDENCE IN TAF. THERE IS A 30 PERCENT CHC THAT
CIGS WILL DIP TO BKN004. GOOD CONFIDENCE THAT VFR CONDS WILL
ARRIVE BETWEEN 1630Z AND 1730Z. NO SIGNIFICANT EAST WIND COMPONENT
EXPECTED.
KBUR...HIGH CONFIDENCE IN CAVU TAF.
MARINE
02/155 AM.
FOR THE WESTERN PORTION OF THE SANTA BARBARA CHANNEL AND THE
INNER WATERS NORTH OF POINT SAL, THERE IS A 30-40% CHANCE OF SCA
WINDS DURING THIS AFTERNOON AND EVENING HOURS. OTHERWISE
CONDITIONS ARE EXPECTED TO REMAIN BELOW SCA LEVELS.
FOR THE OUTER WATERS, SMALL CRAFT ADVISORY (SCA) WINDS AND SEAS
WILL CONTINUE THROUGH TONIGHT BEFORE BEGINNING TO SUBSIDE EARLY
THIS COMING WEEK. WINDS WILL GENERALLY PEAK AT AROUND 30 KNOTS,
STRONGEST DURING THE EVENING HOURS.
SEAS OF 7-10 FEET WILL IMPACT THE OUTER WATERS THROUGH TODAY, DUE
TO A COMBINATION OF LONG-PERIOD SOUTHERLY SWELL FROM A DISTANT
TROPICAL CYCLONE AND SHORTER- PERIOD NORTHWESTERLY SWELL/WIND-
WAVES CAUSED BY THE PREVALENT NW WINDS. AS A RESULT, STEEP,
HAZARDOUS SEAS WILL BE COMMON, ESPECIALLY OVER THE OUTER WATERS,
EXTENDING TO NEARSHORE WATERS OFF THE CENTRAL COAST. SEAS WILL
BEGIN TO SUBSIDE AS THE WINDS WEAKEN LATE TONIGHT INTO EARLY NEXT
WEEK.
DENSE FOG WILL AFFECT SOME OF THE COASTAL WATERS EACH NIGHT AND
MORNING GOING FORWARD.
BEACHES
02/155 AM.
THE SURF WILL DIMINISH FURTHER TODAY, BUT MODERATE TO LOCALLY
STRONG RIP CURRENTS WILL STILL BE COMMON ON EXPOSED SOUTH TO
SOUTHWEST FACING BEACHES.
CONTINUE TO USE EXTRA CAUTION IF YOU ARE AT THE BEACH, AND BE
SURE TO ASK LIFEGUARDS IF AND WHERE IT IS SAFE TO SWIM.
LOX WATCHES/WARNINGS/ADVISORIES
CA...EXTREME HEAT WARNING IN EFFECT UNTIL 8 PM PDT THIS EVENING
FOR ZONES
38-88-343>345-351>353-356>358-368>376-378-379-381>383-548. (SEE LAXNPWLOX).
HEAT ADVISORY IN EFFECT UNTIL 8 PM PDT THIS EVENING FOR ZONES
342-348>350-354-355-362-366-367-377-380. (SEE LAXNPWLOX).
PZ...SMALL CRAFT ADVISORY IN EFFECT UNTIL 3 AM PDT MONDAY FOR
ZONES 670-673-676. (SEE LAXMWWLOX).
PUBLIC...MW/RORKE
AVIATION...RORKE
MARINE...CILIBERTI/RS
BEACHES...CILIBERTI/RS
SYNOPSIS...RK/CILIBERTI
WEATHER.GOV/LOSANGELES
EXPERIMENTAL GRAPHICAL HAZARDOUS WEATHER OUTLOOK AT:
HTTPS://WWW.WEATHER.GOV/ERH/GHWO?WFO=LOX
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