010
FXUS66 KSGX 241749
AFDSGX
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE SAN DIEGO CA
1049 AM PDT TUE MAR 24 2026
SYNOPSIS
TEMPERATURES WILL REMAIN WELL ABOVE AVERAGE THIS WEEK. HIGH TEMPERATURES
FOR INLAND AREAS WILL REMAIN AROUND 15 TO 20 DEGREES ABOVE AVERAGE
WITH SOME RECORD DAILY TEMPERATURES FOR HEAT CONTINUING TO BE
TIED OR BROKEN, MAINLY FOR THE MOUNTAINS AND DESERTS BUT OCCASIONALLY
FOR THE INLAND VALLEYS AS WELL. NIGHT AND MORNING COASTAL LOW
CLOUDS SPREADING INTO THE FAR WESTERN VALLEYS AT TIMES. COOLING
WILL SPREAD INLAND FOR THE WEEKEND INTO EARLY NEXT WEEK, BUT WITH
HIGH TEMPERATURES FOR NEXT TUESDAY STILL AROUND 5 TO 10 DEGREES
ABOVE AVERAGE.
DISCUSSION...FOR EXTREME SOUTHWESTERN CALIFORNIA INCLUDING ORANGE
SAN DIEGO...WESTERN RIVERSIDE AND SOUTHWESTERN SAN BERNARDINO
COUNTIES...
..AVIATION DISCUSSION UPDATED FOR 18Z TAFS
THIS MORNING...THE MARINE LAYER IS SIMILAR TO YESTERDAY AT ABOUT
1500 FT DEEP WITH LOW CLOUDS SPREADING UP TO 15 MILES INLAND AND
FOG ON THE HIGHER COASTAL TERRAIN. CLEARING HAS BEGUN ALONG THE
INLAND EDGES OF THE CLOUD FIELD AND THE CLOUDS/FOG SHOULD CLEAR TO
THE COAST BY NOON. A FAIRLY STRONG INVERSION WILL LIKELY KEEP SOME
LOW CLOUDS AT THE BEACHES INTO THE AFTERNOON.
DAYTIME TEMPERATURES WILL CONTINUE TO BE WELL ABOVE SEASONAL
AVERAGES INTO NEXT WEEKEND AS AN UPPER RIDGE PERSISTS OVER THE
REGION. AN UPPER LEVEL LOW CURRENTLY OFF THE BAJA COAST WILL MOVE
OVER SOCAL WED/THU BUT WILL HAVE LITTLE EFFECT ON OUR WEATHER. HIGH
TEMPERATURES TODAY WILL RANGE FROM AROUND 5 DEGREES ABOVE AVERAGE
NEAR THE COAST TO AROUND 20 DEGREES ABOVE AVERAGE IN THE
MOUNTAINS AND HIGH DESERT. HIGH TEMPERATURES TODAY WILL RANGE
FROM AROUND 70 NEAR THE COAST TO THE MID 80S TO LOWER 90S FOR THE
INLAND EMPIRE WITH THE LOWER DESERTS IN THE 90S. WITH GRADUAL
WARMING, HIGH TEMPERATURES ON THURSDAY WILL RANGE FROM AROUND 10
DEGREES ABOVE AVERAGE NEAR THE COAST TO 15 TO 20 DEGREES ABOVE
AVERAGE FOR MOUNTAINS, VALLEYS, AND DESERTS. MARINE LAYER LOW
CLOUDS AND FOG WILL SPREAD INLAND AGAIN TONIGHT AND WEDNESDAY
NIGHT BUT LIKELY WON'T REACH AS FAR INLAND AS LAST NIGHT AS THE
MARINE LAYER WILL BE A LITTLE SHALLOWER.
A NOTICEABLE COOLING TREND WILL BEGIN SUNDAY AND CONTINUE INTO
NEXT TUESDAY AS THE UPPER HIGH PRESSURE RIDGE GETS DISPLACED TO
THE SOUTHEAST BY A LOW PRESSURE TROUGH MOVING IN FROM THE
NORTHWEST. THE MARINE LAYER CLOUDS AND FOG WILL SPREAD
PROGRESSIVELY FARTHER INLAND EACH NIGHT AND MORNING. NEXT
TUESDAY, HIGH TEMPERATURES WILL GENERALLY BE LESS THAN 10 DEGREES
ABOVE SEASONAL AVERAGES IN ALL AREAS. TEMPS WILL BE IN THE UPPER
60S TO MID 70S NEAR THE COAST, THE MID TO UPPER 70S IN THE INLAND
VALLEYS, THE 70S IN THE HIGH DESERTS, THE 50S AND 60S IN THE MTNS
AND THE MID 80S TO LOW 90S IN THE LOW DESERTS.
AVIATION
241800Z...LOW CLOUDS BASED 600-1000 FEET MSL HAVE MOSTLY CLEARED TO
THE BEACHES THIS MORNING, BUT PATCHY AND INTERMITTENT LOW CLOUDS
COULD LINGER ALONG IMMEDIATE COAST OVER THE DAY. LOW CLOUDS WITH
SIMILAR TO SLIGHTLY LOWER BASES INCREASE AND SPREAD INLAND TO
SIMILAR EXTENT TO THIS MORNING AFTER 02Z. VIS REDUCED 0-5SM MAINLY
OVER HIGHER COASTAL TERRAIN AND VALLEYS. LOW CLOUDS CLEARING 16-18Z
WED MORNING.
OTHERWISE, MOSTLY CLEAR AND VFR CONDITIONS WILL PREVAIL TODAY AND
TONIGHT.
MARINE
NO HAZARDOUS MARINE CONDITIONS EXPECTED THROUGH SATURDAY.
CLIMATE
..FOR LOCATIONS WITH A NEW HIGHEST TEMPERATURE FOR MARCH IN 2026
LOCATION OLD RECORD/DATE NEW RECORD/DATE DAYS ABOVE OLD RECORD
ANAHEIM 90 3/14/2015 100 3/17/2026 3
SANTA ANA 90 3/25/1988 100 3/17/2026 4
SAN JACINTO 99 3/26/1988 102 3/19/2026 3
ESCONDIDO 98 3/26/1988 101 3/20/2026 1
RAMONA 94 3/26/1988 98 3/20/2026 3
ALPINE 95 3/23/1953 99 3/20/2026 2
EL CAJON 98 3/19/1997 101 3/20/2026 1
IDYLLWILD 82 3/22/2004 90 3/19/2026 6
LAKE CUYAMACA 82 3/22/1931 88 3/20/2026 3
PALM SPRINGS 104 3/31/1966 108 3/20/2026 4
INDIO 104 3/10/1916 108 3/19&21/2026 4
THERMAL 103 3/21/2004 108 3/19-21/2026 4
BORREGO SPRINGS 101 3/27/1988 106 3/20/2026 4
CAMPO 92 3/20/1997 100 3/20/2026 4
-"OLD RECORD" REFERS TO THE MARCH RECORD PRIOR TO 2026.
-"DAYS ABOVE OLD RECORD" REFERS TO DAYS IN MARCH 2026 WITH A HIGH
TEMPERATURE EXCEEDING ANY MARCH HIGH TEMPERATURE PRIOR TO 2026.
LOCATIONS WITH A NEW HIGHEST MINIMUM TEMPERATURE FOR MARCH IN 2026...
LOCATION OLD RECORD/DATE NEW RECORD/DATE DAYS ABOVE OLD RECORD
IDYLLWILD 50 3/26/1988 53 3/17/2026 1
LAKE CUYAMACA 55 3/08/2004 57 3/22/2026 1
PALM SPRINGS 70 3/14/2017 78 3/19/2026 4
INDIO 75 3/16/2013 83 3/21/2026 3
BORREGO SPRINGS 70 3/07/1967 73 3/19&20/2026 2
-"OLD RECORD" REFERS TO THE MARCH RECORD PRIOR TO 2026.
-"DAYS ABOVE OLD RECORD" REFERS TO DAYS IN MARCH 2026 WITH A LOW
TEMPERATURE WARMER THAN ANY MARCH LOW TEMPERATURE PRIOR TO 2026.
++FOR INDIO, THE PRIOR EARLIEST DATE IN A YEAR FOR A LOW TEMPERATURE
OF 80 OR HIGHER WAS 81 ON 05/01/2015.
--THIS DATA IS PRELIMINARY. THERE ARE SOME LOCATIONS THIS WEEK
THAT COULD EXCEED THE MARCH RECORD PRIOR TO 2026. THIS WOULD ADD
TO THE DAYS EXCEEDING THE PRE-2026 MARCH RECORD. HOWEVER, IT IS
UNLIKELY ANY NEW MONTHLY MARCH TEMPERATURE RECORDS WILL BE SET
THIS WEEK.
SGX WATCHES/WARNINGS/ADVISORIES
CA...NONE.
PZ...NONE.
PUBLIC...PG
AVIATION/MARINE...CSP
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