741
FXUS66 KSGX 130416
AFDSGX
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE SAN DIEGO CA
916 PM PDT SUN APR 12 2026
SYNOPSIS
PERIODS OF LIGHT TO LOCALLY MODERATE PRECIPITATION EXPECTED THROUGH
MONDAY, MOST WIDESPREAD TODAY. DRY CONDITIONS RETURN TUESDAY AND
WILL PREVAIL THROUGH THE REST OF THE WEEK. PERIODS OF BREEZY WINDS
EXPECTED IN THE AFTERNOONS AND EVENINGS THROUGH MONDAY AND AGAIN MID-
WEEK. NEAR TO BELOW AVERAGE TEMPERATURES EXPECTED FOR MUCH OF THIS
WEEK WITH WARMER CONDITIONS THIS WEEKEND.
DISCUSSION...FOR EXTREME SOUTHWESTERN CALIFORNIA INCLUDING ORANGE
SAN DIEGO...WESTERN RIVERSIDE AND SOUTHWESTERN SAN BERNARDINO
COUNTIES...
EVENING UPDATE...
SHOWERS HAVE BECOME MORE ISOLATED AND LIGHTER THIS EVENING, WITH
MOST OF THE ACTIVITY ACROSS SAN DIEGO COUNTY. THIS IS EXPECTED TO
CONTINUE OVERNIGHT AS THE INITIAL SHORT WAVE LIFTS NORTHEAST OUT
OF THE AREA. SNOW LEVELS CURRENTLY AROUND 6500-7000 FT WILL DROP
TO AROUND 5000-5500 MONDAY MORNING, THEN RISE TO 5500-6000 FT
MONDAY AFTERNOON. ANY SNOW ACCUMULATION WILL BE ONE INCH OR LESS
BELOW 7000 FT. A SECOND LOW, CURRENTLY NEAR EUREKA, WILL DROP
SOUTH AND AMPLIFY TONIGHT, BECOMING A CLOSED LOW OVER CALIFORNIA
BY MONDAY AFTERNOON. THIS NEXT WAVE WILL INTERACT WITH RESIDUAL
DEEP BOUNDARY LAYER MOISTURE TO PRODUCE ANOTHER ROUND OF SCATTERED
SHOWERS AND A SLIGHT (10%) CHANCE OF THUNDERSTORMS AS COLD AIR
ALOFT MOVES OVERHEAD MONDAY AFTERNOON. ADDITIONAL RAIN
ACCUMULATIONS WILL RANGE FROM 0 TO 0.20" FOR THE COASTS/VALLEYS,
0.05-0.30" FOR THE MOUNTAINS, LOCALLY UP TO 0.50" ON THE WEST
FACING COASTAL SLOPES, AND LESS THAN 0.05" IN THE DESERTS.
ISOLATED HIGHER AMOUNTS ARE POSSIBLE WHERE HEAVIER
SHOWERS/THUNDERSTORMS DEVELOP. OTHERWISE SOUTHWEST TO WEST WINDS
GUSTING 30-40 MPH ON THE DESERT MOUNTAIN SLOPES AND THROUGH THE
PASSES CONTINUE AT TIMES THROUGH MONDAY NIGHT, STRONGEST DURING
THE AFTERNOONS AND EVENINGS.
PREVIOUS DISCUSSION...
COOLER AND DRY CONDITIONS WITH WEAKER WINDS EXPECTED ON TUESDAY.
ANOTHER TROUGH OF LOW PRESSURE IS EXPECTED TO DIG INTO THE PACIFIC
NORTHWEST SOMETIME WEDNESDAY INTO THURSDAY. THE BROAD TROUGHING
PATTERN WILL KEEP TEMPERATURES NEAR TO SLIGHTLY BELOW AVERAGE FOR
MOST LOCATIONS AND INCREASE WESTERLY WINDS IN THE MOUNTAIN AND
DESERT AGAIN. THIS LOW IS EXPECTED TO STAY INLAND, WHICH WILL
KEEP US DRY AND BRING CHANCES FOR SANTA ANA WINDS FOR THE END OF
THE WEEK. WEAK RIDGING COMBINED WITH OFFSHORE FLOW IS EXPECTED TO
BRING WARMER CONDITIONS TO THE AREA NEXT WEEKEND.
AVIATION
130400Z...COASTS/VALLEYS...SCT-BKN LOW CLOUDS BASED 3000-6000 FT MSL
OVER THE COASTAL BASIN WILL REMAIN IN PLACE THROUGH TONIGHT.
GENERALLY VFR CONDITIONS THROUGH 12Z MON WITH COVERAGE OF -SHRA
REMAINING ISOLATED AT BEST. THEREAFTER, A SLIGHT UPTICK IN SHOWER
ACTIVITY IS EXPECTED, ESPECIALLY IN SAN DIEGO COUNTY. INTERMITTENT
MVFR CIGS/VIS IN -SHRA/SHRA. SHOWER ACTIVITY DECREASES AGAIN FROM
NORTH TO SOUTH FROM 18Z MON-00Z TUE. BKN LOW CLOUDS BASED 3000-5000
FT RETURN TO SAN DIEGO COUNTY AFTER 03Z TUE WITH BASES LOWERING
SLIGHTLY OVERNIGHT.
MOUNTAINS/DESERTS...WEST TO SOUTHWEST WINDS GUSTING 25-40 KTS
CURRENTLY THROUGH MOUNTAIN PASSES, ALONG DESERTS SLOPES AND
LOCALLY INTO THE DESERTS. WINDS WILL CONTINUE TO WEAKEN SLOWLY
THROUGH TONIGHT BUT REMAIN ELEVATED WITH OCCASIONAL GUSTS 20-25
KTS ALONG THE DESERT FLOOR AND GUSTS TO 35 KTS ALONG SLOPES AND
THROUGH PASSES. WINDS STRENGTHEN AGAIN AFTER 21Z MON WITH GUSTS
25-40 KTS. ISOLATED SHRA/SNSH ACTIVITY WILL CONTINUE ALONG COASTAL
SLOPES THROUGH MONDAY MORNING WITH AN UPTICK IN SHOWER COVERAGE
MONDAY AFTERNOON. FG THROUGH THE PERIOD WHERE CLOUDS INTERSECT
TERRAIN.
OTHERWISE, CURRENT SATELLITE INDICATES MOUNTAIN WAVES ARE PRESENT
THROUGH MOST OF THE INLAND EMPIRE AND DESERTS. MOD UP/DOWNDRAFTS
EXPECTED THROUGH AT LEAST MONDAY MORNING IN LEE OF MTNS.
MARINE
NORTHWEST WINDS WILL BRIEFLY STRENGTHEN AGAIN FOR OUTER COASTAL
WATERS MONDAY AFTERNOON AND EVENING WITH GUSTS 15 TO 20 KTS. CHOPPY
SEAS MAY CREATE HAZARDOUS CONDITIONS.OTHERWISE, NO HAZARDOUS
CONDITIONS EXPECTED THROUGH FRIDAY.
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...SS
AVIATION/MARINE...KW
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