428
FXUS66 KSGX 070912
AFDSGX
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE SAN DIEGO CA
214 AM PDT TUE APR 7 2026
SYNOPSIS
HIGH TEMPERATURES WILL WARM THROUGH WEDNESDAY TO AROUND 10
DEGREES ABOVE AVERAGE FOR INLAND AREAS. THIS WILL BE FOLLOWED BY A
COOLING TREND THROUGH SATURDAY WITH SATURDAY HIGH TEMPERATURES AS
MUCH AS 10 TO 15 DEGREES BELOW AVERAGE FOR THE HIGHER MOUNTAINS.
A LOW PRESSURE SYSTEM FROM THE NORTHWEST WILL BRING INCREASING
CHANCES OF SHOWERS FOR LATE FRIDAY THROUGH SATURDAY ALONG WITH A
CHANCE OF THUNDERSTORMS ON SATURDAY. ADDITIONAL CHANCES FOR
SHOWERS WILL CONTINUE INTO LATE SUNDAY OR SUNDAY NIGHT, BUT WITH
LOWER CONFIDENCE IN THE DETAILS. THERE WILL BE STRONGER SOUTHWEST
TO WEST WINDS FOR THE MOUNTAINS AND DESERTS ON THURSDAY AND
FRIDAY WITH THE STRONGER GUSTS TO 35 TO 45 MPH. THERE COULD BE
ANOTHER ROUND OF WEST TO NORTHWEST WINDS OF SIMILAR STRENGTH ON
SUNDAY. THEN DRIER WITH A WARMING TREND BEGINNING EARLY NEXT WEEK.
DISCUSSION...FOR EXTREME SOUTHWESTERN CALIFORNIA INCLUDING ORANGE
SAN DIEGO...WESTERN RIVERSIDE AND SOUTHWESTERN SAN BERNARDINO
COUNTIES...
..UPDATED AVIATION AND MARINE DISCUSSIONS BELOW
SHORT TERM (TODAY THROUGH THURSDAY)
COASTAL LOW CLOUDS WILL GRADUALLY INCREASE IN COVERAGE OVER THE
COASTAL WATERS AND COAST AND SPREAD INTO THE WESTERN VALLEYS
THROUGH SUNRISE. HIGH TEMPERATURES TODAY WILL BE A FEW DEGREES
COOLER FOR COASTAL AREAS WHILE INLAND AREAS WARM A FEW TO AROUND 5
DEGREES FOR THE MOUNTAINS. HIGH TEMPERATURES TODAY WILL BE NEAR
AVERAGE AT THE COAST TO AROUND 10 DEGREES ABOVE AVERAGE FOR THE
MOUNTAINS AND DESERTS. HIGH TEMPERATURES FOR TODAY WILL RANGE FROM
MID 60S TO AROUND 70 NEAR THE COAST TO THE UPPER 70S TO MID 80S
FOR THE INLAND EMPIRE WITH THE LOWER DESERTS IN THE MID 90S.
WEDNESDAY HIGH TEMPERATURES WILL BE SLIGHTLY WARMER FOR THE COAST
INTO THE VALLEYS WITH NOT MUCH CHANGE FOR THE MOUNTAINS AND
DESERTS. A COOLING TEND WILL BEGIN ON THURSDAY WITH INLAND HIGH
TEMPERATURES A FEW TO AROUND 5 DEGREES COOLER FOR THE MOUNTAINS.
HIGH TEMPERATURES ON THURSDAY WILL RANGE FROM AROUND 70 NEAR THE
COAST TO THE MID 70S TO LOWER 80S FOR THE VALLEYS WITH THE LOWER
DESERTS IN THE LOWER TO MID 90S.
COVERAGE OF COASTAL LOW CLOUDS IS EXPECTED TO BE MORE LIMITED FOR
TONIGHT INTO WEDNESDAY MORNING WITH THE GREATER COVERAGE ACROSS
THE INNER COASTAL WATERS AND ADJACENT COASTAL LAND AREAS. COVERAGE
IS EXPECTED TO INCREASE AND SPREAD FARTHER INLAND FOR WEDNESDAY
NIGHT INTO THURSDAY MORNING AS ONSHORE FLOW BEGINS TO STRENGTHEN
AND THE MARINE LAYER BEGINS TO DEEPEN. THERE WILL ALSO BE AN
INCREASE IN HIGH CLOUDS ON THURSDAY.
LONG TERM (FRIDAY THROUGH MONDAY)
A LOW PRESSURE SYSTEM FROM THE NORTHWEST WILL BRING INCREASING
CHANCES FOR SHOWERS FOR LATE FRIDAY THROUGH SATURDAY ALONG WITH A
CHANCE OF THUNDERSTORMS ON SATURDAY. A SECOND LOW PRESSURE SYSTEM
FROM THE NORTHWEST COULD BRING ADDITIONAL SHOWERS THROUGH SUNDAY
OR SUNDAY NIGHT BUT WITH GREATER SPREAD IN THE MODEL SOLUTIONS AND
RESULTING FORECAST DETAILS.
THROUGH SATURDAY NIGHT, CHANCES FOR MEASURABLE PRECIPITATION RANGE
FROM AROUND 65 PERCENT TOWARD THE COAST TO 80 PERCENT IN THE
MOUNTAIN WITH CHANCES FOR ONE INCH OR MORE OF RAINFALL IN THE
MOUNTAINS AROUND 30 PERCENT AND FOR ONE-HALF INCH OR MORE FOR
COASTAL AREAS AROUND 20 PERCENT. THE SNOW LEVEL WILL LOWER TO
AROUND 6500 FEET ON SATURDAY AND 6000 FEET ON SUNDAY.
DRYING AND WARMING WILL BEGIN EARLY NEXT WEEK ON MONDAY OR
TUESDAY.
AVIATION
070930Z...LOW CLOUDS WILL CONTINUE TO DEVELOP AND EXPAND, EVENTUALLY
COVERING COASTAL AREAS THIS MORNING. BASES AROUND 1000-1400 FEET MSL
WITH VIS 3-5SM OVER HIGHER COASTAL TERRAIN. SCATTER OUT EXPECTED BY
16-17Z. LOW CLOUDS AROUND 800-1200 FEET MSL WILL DEVELOP AFTER 06Z
AND EXPAND THROUGH COASTAL AREAS OVERNIGHT INTO WEDNESDAY.
MARINE
OCCASIONAL WIND GUSTS IN THE OUTER WATERS SHOULD EXCEED 20 KNOTS
WEDNESDAY NIGHT. THERE IS A 20% CHANCE OF THUNDERSTORMS FRIDAY NIGHT
AND SATURDAY. OTHERWISE, 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...17
AVIATION/MARINE...MM
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