931
FXUS66 KSGX 150543
AFDSGX
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE SAN DIEGO CA
1043 PM PDT MON SEP 14 2026
SYNOPSIS
SUBTLE COOLING WILL CONTINUE THROUGH THE MIDDLE OF THE WEEK AS A
TROUGHING PATTERN REMAINS OVER THE WEST COAST WITH TEMPERATURES NEAR
TO UP TO 10 DEGREES BELOW AVERAGE. THIS PATTERN WILL BRING NIGHT AND
MORNING LOW CLOUDS FOR AREAS WEST OF THE MOUNTAINS WITH BREEZY WINDS
ACROSS THE DESERT SLOPES AND DESERTS EACH DAY. SUBTLE WARMING IS
EXPECTED BY LATER THIS WEEK WITH TEMPERATURES RISING BACK TO NEAR
NORMAL.
DISCUSSION...FOR EXTREME SOUTHWESTERN CALIFORNIA INCLUDING ORANGE
SAN DIEGO...WESTERN RIVERSIDE AND SOUTHWESTERN SAN BERNARDINO
COUNTIES...
..UPDATED AVIATION DISCUSSION
A WEAK TROUGHING PATTERN OVER THE WEST WILL BE REINFORCED WITH
ANOTHER SHOT OF COOLER AIR AS ANOTHER LOW PRESSURE SYSTEM MOVES
SOUTHWARD TUESDAY THROUGH THURSDAY. PRESSURE HEIGHTS WILL CONTINUE
FALL, LEADING TO A CONTINUED SUBTLE COOLING TREND. WEDNESDAY AND
THURSDAY WILL SEE THE COOLEST TEMPERATURES OF THE WEEK. THERE IS A
75-100% CHANCE OF TEMPERATURES ACROSS THE INLAND EMPIRE,
COACHELLA VALLEY AND THE LARGE HIGH DESERT CITIES STAYING BELOW 90
DEGREES THESE DAYS; PLENTIFUL 70S AND 80S EXPECTED FOR AREAS
ALONG AND WEST OF THE MOUNTAINS. LOW TEMPERATURES WILL ALSO BEGIN
TO COOL OFF THROUGH THE NEXT FEW NIGHTS AS WELL, WITH LOWS IN THE
50S AND 60S ALONG AND WEST OF THE MOUNTAINS AND IN THE HIGH
DESERT. INCREASED SEA BREEZE WINDS WILL BE FELT ALONG THE DESERT
SLOPES AND INTO THE DESERTS EACH AFTERNOON AND EVENING THROUGH
THURSDAY, SOME AREAS GUSTING OVER 35 MPH IN THE PASSES AND HIGH
DESERT.
THE LOW PRESSURE SYSTEM TO THE NORTH WILL MOVE OUT BY FRIDAY INTO
THE WEEKEND. MODELS BEGIN TO DIVERGE ON WHAT EXACT PRESSURE SYSTEMS
MOVE OVER THE AREA, BUT CONSENSUS CONTINUES TO SHIFT TOWARD WHATEVER
DOES FORM WILL BE WEAK IN NATURE. THIS WILL LEAD TO TEMPERATURES
STAYING NEAR AVERAGE FOR THE LATTER PART OF THE WEEK WITH WEAKER
WINDS ACROSS THE MOUNTAINS AND DESERTS.
AVIATION
150600Z...COAST/VALLEYS...LOW CLOUDS BASED 1700-2000 FEET MSL WILL
GRADUALLY FILL MOST OF THE COASTAL BASIN OVERNIGHT. VIS REDUCED
INLAND 2-5SM. SCATTER OUT 16-18Z. LOW CLOUDS TO PUSH ASHORE AFTER
03Z TUESDAY EVE AND SPREAD INLAND OVERNIGHT AGAIN WITH BASES AROUND
1800-2200 FEET MSL.
MOUNTAINS/DESERTS...MOSTLY CLEAR AND VFR CONDITIONS THROUGH
TUESDAY.
MARINE
NO HAZARDOUS MARINE CONDITIONS ARE EXPECTED THROUGH SATURDAY.
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...APR
AVIATION/MARINE...MM
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