386
FXUS66 KSGX 131825
AFDSGX
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE SAN DIEGO CA
1125 AM PDT WED MAY 13 2026
SYNOPSIS
BRIEF WARMING TREND EXPECTED THROUGH FRIDAY, WITH COOLER
CONDITIONS OVER THE WEEKEND, AND POTENTIAL FOR ADDITIONAL WARMING
EARLY NEXT WEEK. NIGHT AND MORNING LOW CLOUDS AND FOG WILL BE
PRESENT EACH DAY THROUGH THE FORECAST PERIOD ALONG THE COAST AND
INTO PORTIONS OF THE VALLEYS.
DISCUSSION...FOR EXTREME SOUTHWESTERN CALIFORNIA INCLUDING ORANGE
SAN DIEGO...WESTERN RIVERSIDE AND SOUTHWESTERN SAN BERNARDINO
COUNTIES...
VISIBLE SATELLITE AT 11 AM WAS SHOWING LOW CLOUDS CLEARING FROM THE
VALLEYS TO THE COAST. LOW CLOUDS MAY LINGER ALONG THE IMMEDIATE
COAST INTO THE LATE AFTERNOON. THE MARINE LAYER WILL GRADUALLY
BECOME SHALLOWER FOR THURSDAY AND FRIDAY, WITH OVERNIGHT LOW CLOUDS
NOT REACHING AS FAR INLAND. LOW CLOUDS SHOULD CLEAR MOST LOCATIONS
BY LATE MORNING, WITH THE COAST HAVING THE HIGHEST POTENTIAL FOR LOW
CLOUDS LINGERING INTO THE AFTERNOON. THE MARINE LAYER WILL BECOME
DEEPER FOR FRIDAY INTO THE WEEKEND AS A BROAD TROUGH OF LOW PRESSURE
DIGS INTO THE PACIFIC NORTHWEST.
HIGH TEMPERATURES WILL WARM A FEW DEGREES EACH DAY THROUGH FRIDAY,
MOST NOTICEABLE TO FOR THE DESERTS. HIGHS IN THE DESERTS WILL BE 5
TO 10 DEGREES ABOVE AVERAGE, WITH HIGHS WEST OF THE MOUNTAINS WITHIN
5 DEGREES OF AVERAGE. AS THE AFOREMENTIONED LOW DIGS SOUTH, WINDS
WILL INCREASE OVER THE MOUNTAINS AND DESERTS. WINDS WILL PEAK IN
STRENGTH SATURDAY INTO SUNDAY WITH THE TROUGH PASSAGE. ADDITIONALLY
TEMPERATURES WILL FALL A FEW DEGREES, BECOMING SLIGHTLY BELOW NORMAL
FOR MOST LOCATIONS.
TEMPERATURES ARE EXPECTED TO WARM FOR EARLY TO MID-NEXT WEEK. MOST
ENSEMBLE CLUSTERS INDICATE A RIDGE OF HIGH PRESSURE IN THE VICINITY
OF THE US WEST COAST WITH VARIATIONS IN PLACEMENT. A MORE EASTERLY
POSITION (PUTTING THE RIDGE OVER CALIFORNIA) WOULD LEAD TO A WARMER
SOLUTION WITH A MORE WESTERLY POSITION (KEEPING THE RIDGE OVER THE
EASTERN PACIFIC) WOULD KEEP TEMPERATURES MORE MODERATE.
AVIATION
131800Z...COAST/VALLEYS...LOW CLOUDS HAVE RISEN
MOSTLY ABOVE 3000 FT MSL THIS MORNING. CLOUDS ARE CURRENTLY CLEARING
TOWARD THE COAST, BUT SOME PATCHES MAY STICK TO THE COASTLINE
THROUGH THE AFTERNOON. BASES WILL BEGIN TO LOWER AGAIN THIS EVENING
AND PUSH ASHORE AND INLAND AFTER 01Z VCNTY KSAN AND AFTER 08Z VCNTY
KSNA. BASES SHOULD HOVER AROUND 1500-2000 FT MSL OVERNIGHT WITH
CLOUDS FILLING MOST OF THE COASTAL BASIN BY 12Z, THOUGH PARTS OF THE
INLAND EMPIRE MAY STRUGGLE TO FILL IN. 60% CHANCE FOR BKN CIGS FOR
KONT AND KSBD. CLOUDS SCATTER TO THE COAST 16-18Z THU.
MOUNTAINS/DESERTS...SCT CUMULUS BASED AOA 10 KFT OVER RIDGETOPS
THROUGH 00Z WITH SKC OTHERWISE. WESTERLY WIND GUSTS 25-40 KT AFTER
20Z ALONG DESERT SLOPES AND INTO DESERTS. GUSTS LOCALLY TO 50 KTS
THROUGH THE BANNING PASS. MOD UP/DOWNDRAFTS AND LOCAL LLWS IN LEE OF
MOUNTAINS.
MARINE
NO HAZARDOUS MARINE CONDITIONS ARE EXPECTED THROUGH SATURDAY
MORNING. INCREASING WINDS AND SEAS OVER THE OUTER COASTAL WATERS
COULD BECOME HAZARDOUS FOR SMALL CRAFT SATURDAY AFTERNOON THROUGH
SUNDAY.
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...CO
AVIATION/MARINE...KW
CLICK HERE TO GO TO PREVIOUS BULLETINS.
Main Text Page