029
FXUS66 KSGX 012055
AFDSGX
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE SAN DIEGO CA
155 PM PDT FRI AUG 1 2025
SYNOPSIS
TEMPERATURES NEAR AVERAGE AND NIGHT AND MORNING LOW CLOUDS EACH
DAY ALONG THE COAST AND WESTERN VALLEYS THROUGH TUESDAY. HIGH
PRESSURE OVER THE DESERT SOUTHWEST LOOKS TO STRENGTHEN BY THE
MIDDLE/END OF NEXT WEEK, BRINGING A WARMING TREND WITH
TEMPERATURES NEAR 5 TO 10 DEGREES ABOVE AVERAGE AWAY FROM THE
COAST. THERE IS THE POTENTIAL FOR MONSOON MOISTURE TO RETURN LATE
IN THE WEEK, BUT PWATS STAY NEAR NORMAL FOR EARLY AUGUST SO
PRECIPITATION CHANCES REMAIN BELOW 10%.
DISCUSSION...FOR EXTREME SOUTHWESTERN CALIFORNIA INCLUDING ORANGE
SAN DIEGO...WESTERN RIVERSIDE AND SOUTHWESTERN SAN BERNARDINO
COUNTIES...
OUR WEATHER CONTINUES TO BE CONTROLLED BY THE DOMINANT UPPER
RIDGE CURRENTLY POSITIONED OVER SOUTHERN ARIZONA. AS A RESULT,
THE MARINE LAYER MIXED OUT EFFICIENTLY TODAY WITH SUNNY SKIES
EXTENDING SEVERAL MILES OUT TO SEA THIS AFTERNOON. HIGH
TEMPERATURES TODAY COMING IN RIGHT AROUND CLIMATOLOGICAL NORMALS
TO 5 DEGREES BELOW NORMAL- TOPPING OUT IN THE 80S TO LOW 90S FOR
MOST WITH 100-110 DEGREES FOR THE DESERTS. AS WE HEAD THROUGH THE
WEEKEND AND INTO NEXT WEEK, THIS RIDGE DOESN'T BUDGE MUCH AND
STAYS RELATIVELY WEAK. STILL, TEMPERATURES INCREASE VERY GRADUALLY
THROUGH TUESDAY, WITH HIGH TEMPERATURES BY TUESDAY AFTERNOON ONLY
A COUPLE OF DEGREES WARMER THAN TODAY. THE MARINE LAYER WILL
CONTINUE TO SPREAD INLAND AND RETREAT BACK TO SEA EACH DAY WITH
DEPTH VARYING BETWEEN 700 AND 1400FT.
BY THE MIDDLE PART OF NEXT WEEK, THE CENTER OF THE RIDGE SLIDES A
BIT CLOSER TO NEW MEXICO, BUT ALSO BROADENS AND STRENGTHENS
CONSIDERABLY, NETTING IN MORE SUBSTANTIAL WARMING FOR WEDNESDAY
AND THURSDAY. THURSDAY AND FRIDAY LOOK TO BE THE HOTTEST DAYS OF
THE NEXT WEEK, WITH WIDESPREAD MODERATE HEATRISK STRETCHING
TOWARDS THE COASTS AND HIGH HEATRISK SPREADING OUT OF THE DESERTS
LOCALLY TO INLAND VALLEYS. HIGH TEMPERATURES REACHING TO EXCEEDING
100 DEGREES FOR INLAND VALLEYS THURS/FRI WITH THE DESERTS LIKELY
EXCEEDING 115 DEGREES (~90% CHANCE). PWATS WILL LIKELY BE QUITE
BELOW NORMAL FOR EARLY AUGUST MOST OF NEXT WEEK, BUT RECOVER TO
CLOSER TO NORMAL BY THE END OF THE WEEK. STILL, CHANCES FOR ANY
MONSOONAL THUNDERSTORMS BY THE END OF NEXT WEEK STAY LOW, ABOUT 10
PERCENT OR LESS.
AVIATION
012030Z....COASTS/WESTERN VALLEYS...LOW CLOUDS TO REDEVELOP AT THE
COAST AFTER 03Z AND PUSH LOCALLY INLAND AFTER 07Z. BASES AROUND 600-
900 FEET MSL WITH VIS REDUCED 0-5SM OVER HIGHER COASTAL TERRAIN AND
WESTERN VALLEYS. SCATTER OUT SATURDAY 15-17Z.
INLAND VALLEYS/MOUNTAINS/DESERTS
MOSTLY CLEAR WITH VFR CONDITIONS
THROUGH SATURDAY.
MARINE
NO HAZARDOUS MARINE CONDITIONS ARE EXPECTED THROUGH WEDNESDAY.
SGX WATCHES/WARNINGS/ADVISORIES
CA...NONE.
PZ...NONE.
PUBLIC...MUNYAN
AVIATION/MARINE...MM
CLICK HERE TO GO TO PREVIOUS BULLETINS.
Main Text Page