Area Forecast Discussion
Issued by NWS San Diego, CA

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FXUS66 KSGX 291050
AFDSGX

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE SAN DIEGO CA
350 AM PDT FRI APR 29 2016

.SYNOPSIS...
DRY AND A LITTLE WARMER TODAY UNDER WEAK HIGH PRESSURE. A LOW
PRESSURE SYSTEM MOVING SOUTHWARD THROUGH THE WESTERN STATES WILL
BRING COOLING AND GUSTY WEST WINDS FOR THE MOUNTAINS AND DESERTS
SATURDAY WITH A CHANCE OF SHOWERS AND SLIGHT CHANCE OF
THUNDERSTORMS FOR SATURDAY AFTERNOON AND EVENING. DRY AND WARMER
FOR SUNDAY THROUGH TUESDAY WITH HIGH PRESSURE ALOFT OFF THE WEST
COAST. FOR WEDNESDAY THROUGH FRIDAY...COOLING WILL SPREAD INLAND
WITH INCREASING CLOUDS TOWARD THE END OF THE WEEK AS A LOW
PRESSURE SYSTEM OVER THE EASTERN PACIFIC MOVES SLOWLY TOWARDS THE
WEST COAST.

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

A LOW PRESSURE SYSTEM CENTERED NEAR THE FOUR CORNERS WILL MOVE
INTO THE PLAINS WITH DRY AND A LITTLE WARMER WEATHER FOR SOUTHERN
CALIFORNIA TODAY UNDER WEAK HIGH PRESSURE.

A LOW PRESSURE SYSTEM MOVING SOUTHWARD THROUGH THE WESTERN STATES
ON SATURDAY WILL BRING COOLING...GUSTY WEST WINDS IN THE MOUNTAINS
AND DESERTS...AND CHANCE OF SHOWERS AND SLIGHT CHANCE OF
THUNDERSTORMS FOR SATURDAY AFTERNOON AND EVENING. THE EMPHASIS OF
THE HIGHER RESOLUTION MODELS WITH THE CONVECTION IS ACROSS THE
MOUNTAINS OF SAN BERNARDINO AND RIVERSIDE COUNTIES...THE UPPER
DESERTS...THE INLAND EMPIRE...AND POSSIBLY EXTENDING INTO THE
MOUNTAINS OF SAN DIEGO COUNTY.

FOR SUNDAY THROUGH TUESDAY...HIGH PRESSURE ALOFT OFF THE WEST
COAST WILL BRING DRY WEATHER WITH A WARMING TREND.

FOR WEDNESDAY THROUGH FRIDAY...A TROUGH OF LOW PRESSURE OVER
EASTERN PACIFIC WILL MOVE SLOWLY TOWARDS THE WEST COAST. FAR
INLAND AREAS WILL CONTINUE TO WARM ON WEDNESDAY WHILE SLOW COOLING
DEVELOPS NEAR THE COAST ON WEDNESDAY AND SPREADS INLAND ON
THURSDAY AND FRIDAY.

&&

.AVIATION...
290430Z...COAST/VALLEYS...AREAS OF LOW CLOUDS WILL CONTINUE
OVERNIGHT WITH BASES MOSTLY 1800-3000 FT MSL WITH VARIABLE TOPS
5000-7000 FT MSL. CLOUDS WILL BE MOST NUMEROUS IN THE VALLEYS AND
LEAST PREVALENT IN ORANGE COUNTY. CLEARING WILL BE SLOW
FRIDAY...MOSTLY 18Z-20Z...WITH THE VALLEYS CLEARING LAST. MOST
VIS WILL BE 6+ MILES...THOUGH SOME OF THE HIGHER TERRAIN WILL BE
OBSCURED AT TIMES.

MOUNTAINS/DESERTS...AREAS OF TERRAIN OBSCURATIONS WILL OCCUR IN THE
MOUNTAINS THROUGH 20Z FRI...BUT ONLY SCT CLOUDS MOSTLY AT/ABOVE 8000
FEET MSL WILL OCCUR IN THE DESERTS. LOCAL WINDS 20-30 KT GUSTS TO 45
KNOTS WILL OCCUR ON DESERT MOUNTAIN SLOPES TONIGHT...WEAKENING FRI.

&&

.MARINE...
930 PM...CONDITIONS WILL IMPROVE OVER THE COASTAL WATERS TONIGHT AS
THE SMALL CRAFT ADVISORY HAS EXPIRED. SEAS WILL BE 8 FEET OR LESS
WITH WINDS 20 KNOTS OR LESS.

&&

.BEACHES...
330 AM...HIGH RIP CURRENT RISK WILL CONTINUE THROUGH AT LEAST
SATURDAY WITH 3-5 FOOT SURF WITH LOCAL SETS TO 6 FEET AT TIMES. A
LONG PERIOD 18 SECOND SOUTH SWELL WILL MIX IN WITH THE SHORTER
PERIOD 9 SECOND NORTHWEST SWELL THIS WEEKEND.

&&

.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/BEACHES...MOEDE



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