809
FXUS66 KSGX 130033
AFDSGX
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE SAN DIEGO CA
533 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...
..UPDATED AVIATION/MARINE DISCUSSION
THE MAIN COLD FRONT IS MAKING IT'S WAY ACROSS THE INLAND EMPIRE AND
SAN DIEGO COUNTY AS OF 11:30 AM. THE FRONT IS EXPECTED TO WEAKEN
AS IT CONTINUES TO MOVE EAST. LIGHT TO LOCALLY MODERATE RAIN IS
EXPECTED WITH THE FRONTAL PASSAGE, WITH PEAK RAINFALL RATES
0.20-0.30 INCHES PER HOUR. A RAINFALL SUMMARY HAS BEEN HEADLINED
ON OUR WEATHER.GOV/SANDIEGO HOMEPAGE TO CAPTURE THE RAINFALL
TOTALS TODAY. AFTER THE PASSAGE OF THE FRONT, SCATTERED LIGHT TO
LOCALLY MODERATE SHOWERS MAY DEVELOP AROUND THE COASTAL BASIN THIS
EVENING INTO MONDAY MORNING. THE NEXT SHORTWAVE IS EXPECTED TO
MOVE ACROSS SOUTHERN CALIFORNIA MID-DAY MONDAY WHICH WILL SPARK
ANOTHER ROUND OF SCATTERED LIGHT TO LOCALLY MODERATE
PRECIPITATION. PEAK RAINFALL RATES ON MONDAY ARE EXPECTED TO BE
0.20 INCHES PER HOUR OR LESS.
AT HIGHER ELEVATIONS IN THE MOUNTAINS, SNOW CAN BE EXPECTED. SNOW
LEVELS ARE CURRENTLY AROUND 7500 FT AND ARE EXPECTED TO DROP TO 6000
FT BY TONIGHT, LINGERING AT 5500-6000 FT ON MONDAY. AROUND AN INCH
OF SNOW IS EXPECTED BELOW 7000 FT, WITH UP TO 4 INCHES ABOVE 7000
FT. PERIODS OF BREEZY WINDS OVER THE MOUNTAINS AND INTO THE DESERTS
IS EXPECTED THROUGH MONDAY. PEAK GUST OF 35-55 MPH WILL OCCUR IN THE
AFTERNOONS AND EARLY EVENINGS.
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
130030Z...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.
MOUNTAINS/DESERTS
WEST TO SOUTHWEST WINDS GUSTS 30-40
KTS CURRENTLY THROUGH MOUNTAIN PASSES, ALONG DESERTS SLOPES AND
LOCALLY INTO THE DESERTS. WINDS WEAKEN GRADUALLY THIS EVENING, BUT
REMAIN ELEVATED THROUGH THE NIGHT WITH OCCASIONAL GUSTS 20-30 KTS
ALONG THE DESERT FLOOR AND FREQUENT GUSTS 25-35 KTS ALONG SLOPES AND
THROUGH PASSES. WINDS STRENGTHEN AGAIN AFTER 21Z MON WITH GUSTS 25-
40 KTS, SIMILAR TO THIS AFTERNOON. 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 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...CO
AVIATION/MARINE...KW
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