019
FXUS66 KSGX 310842
AFDSGX
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE SAN DIEGO CA
142 AM PDT THU JUL 31 2025
SYNOPSIS
THROUGH TUESDAY OF NEXT WEEK, HIGH TEMPERATURES WILL MOSTLY
FLUCTUATE BETWEEN A FEW DEGREES BELOW AVERAGE AND AROUND 5 DEGREES
ABOVE AVERAGE. FOR WEDNESDAY AND THURSDAY OF NEXT WEEK,
STRENGTHENING HIGH PRESSURE ALOFT CENTERED OVER NEW MEXICO WILL
BRING WARMING OF HIGH TEMPERATURES OF A FEW DEGREES EACH DAY.
NIGHT AND MORNING COASTAL LOW CLOUDS WILL SPREAD INTO PORTIONS OF
THE WESTERN VALLEYS LATE EACH NIGHT.
DISCUSSION...FOR EXTREME SOUTHWESTERN CALIFORNIA INCLUDING ORANGE
SAN DIEGO...WESTERN RIVERSIDE AND SOUTHWESTERN SAN BERNARDINO
COUNTIES...
SHORT TERM (TODAY THROUGH SATURDAY)
TIDE GAUGES SHOW PERIODIC FLUCTUATIONS IN WATER LEVELS OF A FEW
INCHES AT SCRIPPS PIER IN LA JOLLA AND THE BROADWAY PIER IN SAN
DIEGO BAY HAVE CONTINUED SINCE THE INITIAL ARRIVAL OF TSUNAMI
WAVES EARLY WEDNESDAY MORNING, THE RESULT OF THE 8.8 MAGNITUDE
EARTHQUAKE OFF THE COAST OF THE SOUTHERN KAMCHATKA PENINSULA.
THESE MINOR FLUCTUATES COULD CONTINUE FOR A FEW MORE DAYS BASED ON
THE EXTENDED PERIOD OF WATER LEVEL FLUCTUATIONS FOLLOWING THE
ERUPTION OF AN UNDERSEA VOLCANO NEAR TONGA IN THE SOUTH PACIFIC IN
JANUARY 2022 AND THE RESULTING TSUNAMI.
HIGH TEMPERATURES THROUGH MONDAY WILL MOSTLY FLUCTUATE BETWEEN A
FEW DEGREES BELOW AVERAGE AND AROUND 5 DEGREES ABOVE AVERAGE. HIGH
TEMPERATURES WILL WARM SLIGHTLY TODAY, NOT CHANGE MUCH ON FRIDAY,
THEN WARMING SLIGHTLY AGAIN ON SATURDAY WITH SATURDAY HIGH
TEMPERATURES RANGING FROM THE 70S NEAR THE COAST TO THE 90S FOR
THE INLAND EMPIRE WITH 108 TO 114 FOR THE LOWER DESERTS. THE
MARINE LAYER WILL REMAIN AROUND 1500 FEET DEEP WITH NIGHT AND
MORNING COASTAL LOW CLOUDS SPREADING INTO PORTIONS OF THE WESTERN
VALLEYS LATE EACH NIGHT.
LONG TERM (SUNDAY THROUGH WEDNESDAY)
NOT MUCH CHANGE IN HIGH TEMPERATURES IS EXPECTED ON SUNDAY WITH
SLIGHT COOLING FOR MONDAY AND TUESDAY. STRENGTHENING HIGH PRESSURE
CENTERED OVER NEW MEXICO WILL BRING WARMING OF A FEW DEGREES PER
DAY FOR WEDNESDAY AND THURSDAY WITH HIGH TEMPERATURES ON THURSDAY
RANGING FROM THE MID 70S TO LOWER 80S NEAR THE COAST TO THE MID
90S TO 104 FOR THE INLAND EMPIRE WITH 112 TO 116 FOR THE LOWER
DESERTS. THE MARINE LAYER WILL FLUCTUATE BETWEEN 1500 AND 2000
FEET DEEP WITH NIGHT AND MORNING COASTAL LOW CLOUDS SPREADING
INTO PORTIONS OF THE WESTERN VALLEYS LATE EACH NIGHT.
AVIATION
310800Z....COASTS/WESTERN VALLEYS...LOW CLOUDS AND PATCHY FOG WITH
BASES 600-900FT MSL HAVE BEGUN TO PUSH INLAND, SLOWLY SPREADING UP
THE COAST INTO ORANGE COUNTY. VIS DOWN TO 1-3SM FOR COASTAL TERRAIN
AND WESTERN VALLEYS, LASTING THROUGH 15-16Z. LOCALIZED VIS NEAR ZERO
WHERE CLOUDS INTERSECT TERRAIN. CLOUDS PULL BACK TO THE COAST BY 16-
17Z WITH FULL CLEARING BY 21Z. LOW CLOUDS WITH SIMILAR BASES DEVELOP
AND MOVE INLAND AGAIN TONIGHT, MAINLY AFTER 05Z FRIDAY.
INLAND VALLEYS/MOUNTAINS/DESERTS
MOSTLY CLEAR WITH VFR CONDITIONS
THROUGH FRIDAY MORNING.
MARINE
NO HAZARDOUS MARINE CONDITIONS ARE EXPECTED THROUGH TUESDAY.
BEACHES
FOR BEACHES AND HARBORS...SMALL WATER LEVEL FLUCTUATIONS WILL
CONTINUE PERIODICALLY THROUGH THE MORNING FROM THE DIMINISHING
TSUNAMI.
CLIMATE
SAN DIEGO INTERNATIONAL AIRPORT HAS HAD HIGH TEMPERATURES OF 80F
OR HIGHER ONLY FOUR TIMES THIS YEAR SO FAR, ONCE EACH IN
FEBRUARY, MAY, JUNE, AND JULY. THE LAST TIME SAN DIEGO HAD HIGH
TEMPERATURES OF 80F OR HIGHER ON CONSECUTIVE DAYS WAS DURING A
STRETCH OF SUCH DAYS FROM SEPTEMBER 3RD THROUGH 10TH, 2024. DURING
THAT STRETCH, THERE WERE HIGH TEMPERATURES OF 90F OR HIGHER ON THE
7TH THROUGH 9TH.
SKYWARN
SKYWARN ACTIVATION IS NOT REQUESTED. HOWEVER WEATHER SPOTTERS ARE
ENCOURAGED TO REPORT SIGNIFICANT WEATHER CONDITIONS.
SGX WATCHES/WARNINGS/ADVISORIES
CA...NONE.
PZ...NONE.
PUBLIC/CLIMATE...17
AVIATION/MARINE/BEACHES...ZUBER
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