419
FXUS66 KSGX 302326
AFDSGX
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE SAN DIEGO CA
426 PM PDT THU APR 30 2026
SYNOPSIS
LOW PRESSURE TO THE SOUTH WILL CONTRIBUTE TO HIGH LEVEL CLOUDS
ACROSS THE REGION FOR THE REMAINDER OF THE DAY INTO THE EVENING.
WEAK HIGH PRESSURE OVER THE REGION ON FRIDAY AND SATURDAY WILL
LEAD TO A WARMING TREND WITH HIGH TEMPERATURES 5 TO 10 DEGREES
ABOVE NORMAL. LOW PRESSURE OFF THE COAST WILL MOVE INLAND, LEADING
TO COOLER AND BREEZIER CONDITIONS STARTING SUNDAY INTO THE FIRST
HALF OF NEXT WEEK. THIS SYSTEM HAS A LOW CHANCE TO BRING LIGHT
RAIN SHOWERS TO AREAS FROM THE MOUNTAINS TO THE COAST ON MONDAY
AND TUESDAY. FAIR AND WARMER WEATHER IS EXPECTED BY THE MIDDLE AND
END OF NEXT WEEK.
DISCUSSION...FOR EXTREME SOUTHWESTERN CALIFORNIA INCLUDING ORANGE
SAN DIEGO...WESTERN RIVERSIDE AND SOUTHWESTERN SAN BERNARDINO
COUNTIES...
..UPDATED AVIATION AND MARINE DISCUSSION
A 568 MB AREA OF LOW PRESSURE IS CURRENTLY MOVING OVER THE
NORTHERN BAJA CALIFORNIA COAST. THIS IS LEADING TO SCATTERED HIGH
LEVEL CLOUDS ACROSS THE SOUTHERN PORTIONS OF OUR FORECAST AREA.
ELEVATED WINDS OUT OF THE WEST CAN ALSO BE EXPECTED LATER THIS
AFTERNOON AND EVENING ACROSS THE MOUNTAIN SLOPES INTO THE DESERTS
WITH WINDS GUSTING NEAR 25-40 MPH. THIS SYSTEM WILL CONTINUE TO
PUSH EASTWARD THROUGHOUT THE DAY AS A WEAK AREA OF HIGH PRESSURE
TAKES ITS PLACE. THIS WILL LEAD TO WARMER WEATHER FOR YOUR FRIDAY
WITH HIGH TEMPERATURES WARMING ANOTHER 5 DEGREES OVER ALL WITH
SIMILAR TEMPERATURES EXPECTED ON SATURDAY. THE MARINE LAYER WILL
CONTINUE TO BE FAIRLY DEEP WITH LOW CLOUDS EXPECTED EACH MORNING
FOR PARTS OF THE COASTAL BASIN.
MODELS ARE IN GOOD AGREEMENT IN A CLOSED LOW DESCENDING FROM THE
NORTH OVER THE WEEKEND. THIS SYSTEM LOOKS TO MOVE SOMEWHERE NOT
FAR OFF THE SOCAL COAST BY SUNDAY, PUSHING INLAND MONDAY AND
TUESDAY. AS THE SYSTEM APPROACHES THE REGION ON SUNDAY,
TEMPERATURES FROM SATURDAY TO SUNDAY WILL LOWER AROUND 5 TO 10
DEGREES ACROSS ALL AREAS. THE WEATHER SYSTEM WILL ALSO INCREASE
WINDS ACROSS THE REGION, WITH WIDESPREAD WESTERLY WIND GUSTS
25-45 MPH ACROSS THE MOUNTAINS AND DESERTS EACH AFTERNOON AND
EVENING. AS THE SYSTEM MOVES OVER SOCAL, THERE WILL BE THE CHANCE
FOR LIGHT RAIN TO OCCUR FROM THE COAST TO THE MOUNTAINS. THE
SYSTEM'S MOISTURE PROFILE CONTINUES TO LOOK LIMITED, SO CHANCES
FOR PRECIPITATION IS NEAR 15-25% FOR THESE AREAS. THERE MAY BE
DRIZZLE/LIGHT SHOWERS BY MONDAY MORNING, BUT THE BEST CHANCE FOR
RAIN ACROSS THE REGION WILL BE ON TUESDAY AS THE CORE OF THE
SYSTEM PASSES BY. ACCUMULATIONS LOOK LIGHT TO NONE, HIGHEST ACROSS
THE COASTAL SLOPES OF THE MOUNTAINS.
MODELS START TO STRUGGLE A BIT BY THE MIDDLE AND END OF NEXT WEEK
REGARDING THE WEATHER SYSTEM MENTIONED ABOVE. SOME WANT TO DELAY
THE SYSTEM INTO WEDNESDAY, OTHERS DO NOT. REGARDLESS, AFTER THE
WEATHER SYSTEM PASSES, A WEAK RIDGE WILL MOVE IN ITS PLACE,
BRINGING WARMER AND DRIER WEATHER FOR THE END OF NEXT WEEK WITH
LESS WIND.
AVIATION
302330Z....COAST/VALLEYS...BKN-SCT LOW CLOUDS WITH BASES 1500-2500
FT MSL HAVE DEVELOPED ALONG THE IMMEDIATE COAST, INCLUDING KSAN AND
KCRQ. LOW CLOUDS WILL BECOME MORE WIDESPREAD, SPREADING UP THE
COAST TOWARDS KSNA BY 06Z AND FILLING IN MUCH OF THE COASTAL BASIN
BY 10Z. LOW CLOUDS WILL CLEAR TO THE COAST 16-18Z, WITH THE
POTENTIAL FOR BKN LOW CLOUDS TO LINGER ALONG THE IMMEDIATE COAST
THROUGH 21Z.
MOUNTAINS/DESERTS
AREAS OF ELEVATED WESTERLY WINDS 20-30 KTS,
WITH GUSTS TO 40 KTS THROUGH MOUNTAIN PASSES AND INTO ADJACENT
DESERTS THROUGH 10Z FRI. AREAS OF UP/DOWNDRAFTS AND ISOLATED LLWS IN
LEE OF MOUNTAINS.
MARINE
NO HAZARDOUS MARINE CONDITIONS ARE EXPECTED THROUGH TUESDAY.
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...CO
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