Area Forecast Discussion
Issued by NWS San Diego, CA

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000
FXUS66 KSGX 042024
AFDSGX

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE SAN DIEGO CA
200 PM PDT TUE AUG 4 2015

.SYNOPSIS...

SEASONAL WEATHER WILL CONTINUE THIS COMING WEEK UNDER HIGH PRESSURE
ALOFT...BUT IT WILL BE QUITE HOT INLAND TODAY AND WEDNESDAY. LOWER
PRESSURE OFF THE CALIFORNIA COAST WILL BRING COOLER WEATHER THURSDAY
THROUGH SATURDAY...WITH INCREASING COASTAL CLOUDS DURING THE NIGHTS
AND MORNINGS. HIGHER PRESSURE RETURNS NEXT WEEK FOR A MODEST WARMING
TREND AND MORE COASTAL CLOUDS.

&&

.DISCUSSION...FOR EXTREME SOUTHWESTERN CALIFORNIA INCLUDING ORANGE...
SAN DIEGO...WESTERN RIVERSIDE AND SOUTHWESTERN SAN BERNARDINO
COUNTIES...

THE FORECAST FOR A WARMING TREND IS ON TRACK AS TEMPERATURES IN ALL
AREAS ARE RUNNING A FEW DEGREES HIGHER THAN THEY WERE AT THIS TIME
YESTERDAY. SUNNY SKIES WILL CONTINUE INTO THE EVENING WITH NOT EVEN
ANY COASTAL LOW CLOUDS. HIGH PRESSURE OVER TEXAS WILL CONTINUE TO
MORPH WESTWARD THROUGH WEDNESDAY TO BRING THE HOTTEST DAY IN OUR
REGION. TEMPERATURES WILL CLIMB TO 115 IN THE LOWER DESERTS AND
AROUND 102 IN THE INLAND VALLEYS AND HIGH DESERTS. COASTAL CLOUDS
WILL BE QUITE MINIMAL IN TIME AND SPACE AS THEY WERE TODAY. ON
THURSDAY THERE WILL BE SOME MONSOON TYPE CLOUDS COMING NORTH OUT OF
MEXICO...BUT AT THIS TIME THE INSTABILITY AND THE LEVEL OF THIS
MOISTURE DO NOT APPEAR FAVORABLE TO GENERATE ANY SHOWERS IN OUR
REGION. A LOW PRESSURE TROUGH OFF THE CALIFORNIA COAST WILL BEGIN TO
ASSERT ITSELF THURSDAY AND PUSH ASIDE THE BIG HIGH PRESSURE RIDGE
THROUGH SATURDAY. THIS WILL BRING A COOLING TREND AND ALSO BRING
BACK MORE EXTENSIVE COASTAL CLOUDS NIGHTS AND MORNINGS. NOT MUCH
CHANGE IS EXPECTED IN OUR SUMMER WEATHER PATTERN NEXT WEEK WITH A
LOW PRESSURE TROUGH OFF THE CALIFORNIA COAST AND A HIGH PRESSURE
RIDGE TO OUR EAST. THERE IS SOME REBOUND IN THE HIGH PRESSURE
INDICATING SOMEWHAT WARMER WEATHER AND A DIMINISHED MARINE LAYER
ONCE AGAIN.

&&

.AVIATION...

042000Z...COAST/VALLEYS...SKC CONDS WITH A FEW PASSING HIGH CLOUDS
THIS AFTERNOON. PATCHY STRATUS WITH BASES 900-1200 FT MSL AND TOPS
1500 FT MSL WILL MAINLY AFFECT COASTAL SAN DIEGO COUNTY TONIGHT
AFTER 05/0600Z...POSSIBLY AFFECTING KSNA DURING THE EARLY MORNING.
HOWEVER...COVERAGE IS EXPECTED TO BE PATCHY. VIS WILL DECREASE TO 3-
5 SM WHERE THE STRATUS INTERSECTS TERRAIN ON THE LOWER COASTAL
SLOPES. THESE LOW CLOUDS WILL ERODE TO THE COAST BETWEEN 05/1500Z-
1700Z.

MTNS/DESERTS...FEW-SCT CLOUDS AOA 20000 FT MSL AND UNRESTRICTED VIS
THROUGH WED EVENING.

&&

.MARINE...

100 PM...NORTH-NORTHWEST WINDS GUSTING 20-25 KT WILL DEVELOP OVER
PORTIONS OF THE OUTER COASTAL WATERS LATER THIS AFTERNOON AND
EVENING. A SMALL CRAFT ADVISORY REMAINS IN EFFECT FOR THIS PERIOD.
WINDS WILL WEAKEN FOR WEDNESDAY AFTERNOON AND EVENING WITH GUSTS TO
AROUND 20 KT. NO HAZARDOUS MARINE WEATHER IS EXPECTED THU THROUGH
SAT.

&&

.SKYWARN...

SKYWARN ACTIVATION IS NOT REQUESTED. HOWEVER WEATHER SPOTTERS ARE
ENCOURAGED TO REPORT SIGNIFICANT WEATHER CONDITIONS.

&&

.SGX WATCHES/WARNINGS/ADVISORIES...
CA...HEAT ADVISORY UNTIL 6 PM PDT WEDNESDAY FOR COACHELLA VALLEY-SAN
     GORGONIO PASS NEAR BANNING.

PZ...SMALL CRAFT ADVISORY FOR WINDS UNTIL NOON PDT WEDNESDAY FOR
     WATERS FROM SAN MATEO POINT TO THE MEXICAN BORDER EXTENDING
     30 TO 60 NM OUT INCLUDING SAN CLEMENTE ISLAND.

&&

$$

PUBLIC...MM
AVIATION/MARINE...JT



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