265
FXUS66 KSGX 150002
AFDSGX
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE SAN DIEGO CA
502 PM PDT TUE JUL 14 2026
SYNOPSIS
ABOVE AVERAGE HIGH AND LOW TEMPERATURES FROM COAST TO THE DESERTS
THROUGH THURSDAY. SHOWERS AND THUNDERSTORMS POSSIBLE THIS AFTERNOON
OVER THE MOUNTAINS AND LOCALLY INTO THE HIGH DESERT. VERY LIMITED
THUNDERSTORM CHANCES FOR WEDNESDAY. HIGH TEMPERATURES WILL COOL TO
WITHIN A FEW DEGREES OF AVERAGE, WITH LOWS EXPECTED TO REMAIN A FEW
DEGREES ABOVE AVERAGE THROUGH THE WEEKEND. MONSOONAL MOISTURE WILL
INCREASE FOR THURSDAY THROUGH THE WEEKEND WITH CHANCES OF AFTERNOON
SHOWERS AND THUNDERSTORMS MAINLY OVER THE MOUNTAINS AND DESERTS.
DISCUSSION...FOR EXTREME SOUTHWESTERN CALIFORNIA INCLUDING ORANGE
SAN DIEGO...WESTERN RIVERSIDE AND SOUTHWESTERN SAN BERNARDINO
COUNTIES...
..UPDATED AVIATION DISCUSSION
HIGH PRESSURE ALOFT WILL KEEP BOTH HIGH AND LOW TEMPERATURES ABOVE
AVERAGE THROUGH THURSDAY. TODAY WILL SEE ADDITIONAL CHANCES OF
SHOWERS AND THUNDERSTORMS MAINLY CONFINED TO THE MOUNTAINS WITH THE
POTENTIAL FOR SHOWERS/THUNDERSTORMS TO DRIFT INTO THE HIGH DESERT.
OVERALL RAINFALL RATES WILL BE LESS THAN 0.50", WITH ONLY A 10
PERCENT CHANCE OF RAINFALL RATES EXCEEDING 0.50". THUNDERSTORM
CHANCES DECREASE INTO WEDNESDAY AS THE HEAT PEAKS.
HIGH TEMPERATURES ON WEDNESDAY WILL BE MOSTLY 5 TO 10 DEGREES ABOVE
AVERAGE. LOW TEMPERATURES ON WEDNESDAY WILL BE AROUND 5 TO 8 DEGREES
ABOVE AVERAGE, UP TO 10 TO 15 DEGREES ABOVE AVERAGE ON MOUNTAIN
FOOTHILLS AND SLOPES. THE WARM NIGHTS WILL CONTRIBUTE MORE TO THE
HIGHER HEATRISK FOR THE NEXT FEW DAYS. THE DAYTIME HEAT WILL BE
MOSTLY NOT RECORD SETTING. HOWEVER, THERE COULD BE A FEW RECORDS
TIED OR BROKEN IN THE MOUNTAINS FOR RECORD WARM LOW TEMPERATURES.
AFTER A DECREASE IN MID-LEVEL MOISTURE WEDNESDAY, PRECIPITABLE WATER
VALUES WILL BEGIN INCREASING AGAIN ON THURSDAY WITH THE HIGHER
VALUES FOR FRIDAY THROUGH NEXT WEEKEND.
FOR EARLY NEXT WEEK, THE UPPER LEVEL RIDGE OF HIGH PRESSURE WILL
START TO DRIFT SOUTH AND WEST MORE OVER THE FOUR CORNERS REGION.
THIS WILL LEAVE THE DOOR FOR MONSOONAL MOISTURE OPEN, KEEPING DAILY
CHANCES FOR AFTERNOON SHOWERS AND THUNDERSTORMS OVER THE MOUNTAINS,
LOCALLY INTO THE DESERTS. HIGH TEMPERATURES WILL REMAIN NEAR NORMAL,
WITH LOW TEMPERATURES EXPECTED TO REMAIN ABOVE AVERAGE.
AVIATION
150000Z....COAST/VALLEYS...MOSTLY SKC THIS AFTERNOON. VERY PATCHY
LOW CLOUDS BASED 600-1000 FT MSL DEVELOP SLOWLY AFTER 07Z AND
INCREASE IN COVERAGE AROUND 08-13Z WED, UP TO 10-15 MILES INLAND.
VIS REDUCTIONS (BR/HZ) DOWN TO 1-3SM ON ELEVATED COASTAL TERRAIN AND
VALLEYS ALONG THE SD COUNTY I-15 CORRIDOR. ONLY ABOUT 20-40% MAXIMUM
CIG COVERAGE EXPECTED EARLY WED OVER OC (AROUND 13Z); EXPECT ONLY
BRIEF PATCHY CIGS OVER KSNA, IF ANY. VIS IMPROVES AND LOW CLOUDS
SCATTER OUT 14-17Z. OTHERWISE, VFR CONDITIONS PREVAIL WITH FEW HIGH
CLOUDS ABOVE 10 KFT WEDNESDAY AFTERNOON.
MOUNTAINS/DESERTS...SCT TO LOCALLY BKN CLOUDS WITH BASES AROUND
10,000 FT AND ISOLD SHRA OVER MOUNTAIN RIDGES THROUGH 02Z WED.
OTHERWISE, FEW-SCT HIGH CLOUDS AOA 15,000 FT.
MARINE
NO HAZARDOUS MARINE CONDITIONS ARE EXPECTED THROUGH SATURDAY.
BEACHES
ASTRONOMICAL HIGH TIDES PEAKING 7.0-7.5 FT AROUND 9:40 PM THIS
EVENING WILL DROP TO A PEAK OF 6.5-7.0 FEET WEDNESDAY EVENING. HIGH
TIDES COMBINE WITH A MODEST SOUTH SWELL (2 FT SWELL AT 13-15 SECONDS
FROM 190 DEGREES) TO GENERATE SURF OF 3-5 FT FOR SOUTH-FACING
BEACHES AND 2-4 FT ELSEWHERE. THIS WILL PRODUCE AREAS OF COASTAL
FLOODING IN LOW LYING AREAS, BOARDWALKS, BEACH PARKING LOTS, AND
BEACH ADJACENT STREETS DURING EVENING HIGH TIDES. A BEACH HAZARDS
STATEMENT REMAINS IN EFFECT THROUGH WEDNESDAY EVENING AND CONTAINS
FURTHER DETAILS. THERE WILL BE AN INCREASED RISK OF RIP CURRENTS
THROUGH WEDNESDAY.
SKYWARN
SKYWARN ACTIVATION IS NOT REQUESTED. HOWEVER WEATHER SPOTTERS ARE
ENCOURAGED TO REPORT SIGNIFICANT WEATHER CONDITIONS.
SGX WATCHES/WARNINGS/ADVISORIES
CA...BEACH HAZARDS STATEMENT THROUGH WEDNESDAY EVENING FOR ORANGE
COUNTY COASTAL AREAS-SAN DIEGO COUNTY COASTAL AREAS.
HEAT ADVISORY FROM 10 AM WEDNESDAY TO 8 PM PDT THURSDAY FOR
ORANGE COUNTY COASTAL AREAS-SAN DIEGO COUNTY COASTAL AREAS.
EXTREME HEAT WARNING FROM 10 AM WEDNESDAY TO 8 PM PDT THURSDAY
FOR ORANGE COUNTY INLAND AREAS-RIVERSIDE COUNTY MOUNTAINS-
SAN BERNARDINO COUNTY MOUNTAINS-SAN BERNARDINO AND
RIVERSIDE COUNTY VALLEYS-THE INLAND EMPIRE-SAN DIEGO COUNTY
MOUNTAINS-SAN DIEGO COUNTY VALLEYS-SAN GORGONIO PASS NEAR
BANNING-SANTA ANA MOUNTAINS AND FOOTHILLS.
EXTREME HEAT WARNING UNTIL 8 PM PDT THURSDAY FOR COACHELLA
VALLEY-SAN DIEGO COUNTY DESERTS.
PZ...NONE.
PUBLIC...CO
AVIATION/MARINE/BEACHES...WESTERINK
CLICK HERE TO GO TO PREVIOUS BULLETINS.
Main Text Page