Area Forecast Discussion
Issued by NWS San Diego, CA

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000
FXUS66 KSGX 041557
AFDSGX

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE SAN DIEGO CA
900 AM 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
INTO NEXT WEEK...WITH INCREASING COASTAL CLOUDS DURING THE NIGHTS
AND MORNINGS.

&&

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

LOW CLOUDS WERE LESS EXTENSIVE THIS MORNING AND ALMOST ENTIRELY
AVOIDED ORANGE COUNTY. SUNNY SKIES WILL PREVAIL TODAY ACROSS THE
ENTIRE REGION AS WE BEGIN A WARMING TREND. HIGH PRESSURE OVER TEXAS
WILL MORPH WESTWARD TODAY THROUGH WEDNESDAY TO BRING VERY HOT INLAND
WEATHER. WEDNESDAY APPEARS TO BE THE HOTTEST DAY WITH TEMPERATURES
REACHING UP 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 THIS MORNING. ON THURSDAY THERE WILL BE
SOME MONSOON TYPE CLOUDS COMING NORTH OUT OF MEXICO...BUT 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 WITH A LOW PRESSURE TROUGH OFF THE CALIFORNIA COAST
AND A HIGH PRESSURE RIDGE TO OUR EAST. NEXT WEEK THERE IS SOME
REBOUND IN THE HIGH PRESSURE INDICATING SOMEWHAT WARMER WEATHER AND
A DIMINISHED MARINE LAYER ONCE AGAIN.

&&

.AVIATION...

041530Z...COAST/VALLEYS...PATCHY STRATUS AFFECTING MAINLY COASTAL
SAN DIEGO COUNTY...BASES AROUND 900-1100 FT AND TOPS 1300 FT
MSL...WILL SLOWLY ERODE TO THE BEACHES THROUGH 1630Z. MOSTLY CLEAR
SKIES THIS AFTERNOON WITH TYPICAL DIURNAL BREEZES. CLOUD COVERAGE
WILL BE PATCHY AGAIN TONIGHT...PUSHING 10 TO 15 MILES INLAND MAINLY
ALONG THE SAN DIEGO COUNTY COAST AFT 05/0300Z THIS EVENING.

MTNS/DESERTS...FEW-SCT CLOUDS AOA FL200 AND UNRESTRICTED VIS THROUGH
WED MORNING.

&&

.MARINE...

852 AM...NORTH-NORTHWEST WINDS GUSTING 20-25 KT WILL DEVELOP OVER
PORTIONS OF THE OUTER COASTAL WATERS THIS AFTERNOON AND EVENING. A
SMALL CRAFT ADVISORY REMAINS IN EFFECT FOR THIS PERIOD. WINDS WILL
WEAKEN FOR WED 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 FROM NOON TODAY TO 6 PM PDT WEDNESDAY FOR
     COACHELLA VALLEY-SAN GORGONIO PASS NEAR BANNING.

PZ...SMALL CRAFT ADVISORY FOR WINDS FROM NOON TODAY TO 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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