370
FXUS66 KSGX 210449
AFDSGX
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE SAN DIEGO CA
849 PM PST FRI FEB 20 2026
SYNOPSIS
AFTER A COLD MORNING SATURDAY, TEMPERATURES TREND UPWARDS EACH DAY
OVER THE WEEKEND THROUGH MONDAY. FAIR, DRY, AND WARM WEATHER
LIKELY PERSISTS THROUGH NEXT WEEK.
DISCUSSION...FOR EXTREME SOUTHWESTERN CALIFORNIA INCLUDING ORANGE
SAN DIEGO...WESTERN RIVERSIDE AND SOUTHWESTERN SAN BERNARDINO
COUNTIES...
CLEAR SKIES ACROSS NEARLY THE ENTIRE REGION THIS EVENING, A MARKED
DIFFERENCE FROM THE REST OF THIS WEEK. ISOLATED AREAS OF GROUND
FOG ARE POSSIBLE LATE TONIGHT, MOSTLY IN SHELTERED VALLEYS LIKE
RAMONA. OTHERWISE, CLEAR SKIES AND DRIER AIR WILL LEAD TO
EFFICIENT RADIATIVE COOLING TONIGHT, AND COLD OVERNIGHT AND
MORNING TEMPERATURES. INLAND VALLEYS WILL BE COLD AND STABLE
ENOUGH THAT PATCHY FROST WILL DEVELOP IN AREAS OVERNIGHT,
ESPECIALLY THE INLAND EMPIRE.
AFTER A CHILLY MORNING, SATURDAY'S AFTERNOON TEMPERATURES WILL BE
NOTICEABLY WARMER THAN TODAY'S, THE START OF A WARMING TREND THAT
WILL EXTEND INTO NEXT WEEK. MOSTLY CLEAR SKIES SATURDAY MORNING
WILL GIVE WAY TO INCREASING UPPER-LEVEL CLOUDS IN THE LATER
AFTERNOON, BROUGHT BY A LARGE LOW PRESSURE SYSTEM WELL TO OUR
NORTHWEST OVER THE EASTERN PACIFIC. FOR MORE DETAILS, SEE THE
PREVIOUS DISCUSSION BELOW.
PREVIOUS DISCUSSION...ISSUED 251 PM PST FRI FEB 20 2026
WEAK
HIGH PRESSURE ALOFT DEVELOPS FOR THIS WEEKEND, AND THERE IS ALSO
AN OFFSHORE PRESSURE GRADIENT THAT DEVELOPS TONIGHT AND LASTS
THROUGH SATURDAY. THAT WILL PRODUCE AREAS OF GUSTY EASTERLY WINDS
THROUGH THE PENINSULAR MOUNTAINS LOCALLY INTO INLAND VALLEYS. THAT
WILL BOOST THE WARMING TREND WEST OF THE MOUNTAINS. THE OFFSHORE
FLOW WEAKENS A LITTLE ON SUNDAY, BUT THE WARMING TREND CONTINUES
INTO MONDAY. HIGH TEMPERATURES WILL BE IN THE 60S SATURDAY, 70S
SUNDAY, AND A FEW SPOTS SHOULD HIT 80 DEGREES MONDAY. SKIES WILL
HAVE PERIODS OF HIGH CLOUDS, BUT THE SUN WILL SHINE THROUGH MOST
OF THE TIME. OUR UPPER RIDGE OF HIGH PRESSURE OVER CALIFORNIA WILL
AMPLIFY SOME NEXT WEEK. A PLUME OF MOISTURE TRIES TO APPROACH
SOCAL NEXT WEDNESDAY, BUT NOW NEARLY ALL MODEL GUIDANCE STEERS
THAT MOISTURE INTO NORTHERN AND CENTRAL CALIFORNIA. CONFIDENCE IS
NEARLY 100% THAT SOCAL WILL STAY DRY THROUGH AT LEAST FRIDAY. IT
WILL BE A LITTLE COOLER TUESDAY THROUGH THURSDAY AS WEAK ONSHORE
FLOW RETURNS, BUT STILL WELL ABOVE NORMAL. THE RIDGE APPEARS TO
AMPLIFY LATER NEXT WEEK, WHICH IF IT DOES, COULD PRODUCE
WIDESPREAD TEMPERATURES IN THE 80S IN THE VALLEYS, AND LOWER 90S
IN THE LOW DESERT ON FRIDAY.
AVIATION
210400Z...MOSTLY VFR CONDITIONS WILL PREVAIL THROUGH THE TAF PERIOD.
PATCHY RADIATION FG TONIGHT, MOSTLY CONFINED TO WIND-SHELTERED
VALLEYS (I.E. KRNM, KL18). CURRENTLY NOT EXPECTING ANY IMPACTS TO
TAF SITES. SCT-BKN HIGH CLOUDS AROUND 25KFT AFTER 00Z SUN.
MARINE
NO MARINE HAZARDS ARE EXPECTED THROUGH WEDNESDAY EVENING.
SGX WATCHES/WARNINGS/ADVISORIES
CA...NONE.
PZ...NONE.
PUBLIC...CSP
AVIATION/MARINE...KW
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