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881
FXUS66 KSGX 240951
AFDSGX

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE SAN DIEGO CA
300 AM PDT THU APR 24 2014

.SYNOPSIS...
WEAK HIGH PRESSURE ALOFT WILL BRING FAIR WEATHER TODAY. A
STRONG...COLD LOW PRESSURE TROUGH WILL MOVE ACROSS SOUTHERN
CALIFORNIA FRIDAY AND SATURDAY WITH SCATTERED SHOWERS AND GUSTY WEST
WINDS IN THE MOUNTAINS AND DESERTS. A RIDGE OF HIGH PRESSURE
BUILDING OVER THE WEST WILL BRING MUCH WARMER WEATHER NEXT WEEK.

&&

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

HARD TO FIND ANY CLOUDS THIS MORNING. A FEW COASTAL CLOUDS COULD
FORM BY SUNRISE...BUT WEAK HIGH PRESSURE ALOFT WILL GIVE US ANOTHER
BEAUTIFUL DAY TODAY. THAT WILL ALL COME CRASHING DOWN FRIDAY. A
DEEPENING LOW PRESSURE TROUGH OVER THE PACIFIC WILL TAKE AIM AT
SOUTHERN CALIFORNIA FRIDAY AND MOVE THROUGH THE REGION FRIDAY NIGHT
AND SATURDAY MORNING. IT WILL BRING STRONG WINDS TO THE
MOUNTAINS...DESERTS AND COASTAL WATERS FRIDAY AFTERNOON AND
NIGHT...WITH A LITTLE DECREASE THROUGH SATURDAY EVENING. GUSTS WILL
REACH 40 TO 60 MPH IN THE WIND PRONE AREAS AND BLOWING DUST IS QUITE
PROBABLE IN PARTS OF THE DESERT. MOSTLY LIGHT SHOWERS WILL ALSO COME
ALTHOUGH MOISTURE IS QUITE LIMITED. THE CHANCE OF SHOWERS WILL OCCUR
BETWEEN ABOUT 4 PM FRIDAY AND 10 AM SATURDAY. THE STRONG WINDS AT
MOUNTAIN LEVEL WILL ENHANCE THE RAINFALL ON COASTAL MOUNTAIN SLOPES.
LESS THAN 0.25 INCH IS EXPECTED OVERALL...BUT A COUPLE MOUNTAIN
SPOTS COULD REACH 0.75 INCH. SNOW WILL FALL ABOVE 5500 FEET AND AN
INCH OR TWO COULD ACCUMULATE ABOVE 6000 FEET. HARDLY WORTH
MENTIONING...BUT NOT OUT OF THE QUESTION...ARE ISOLATED
THUNDERSTORMS FRIDAY NIGHT. THE SYSTEM SCOOTS OUT EAST SATURDAY
LEAVING QUITE A COOL DAY WITH ONLY 60S IN THE COASTAL BASIN. HIGH
PRESSURE ALOFT BUILDS GRADUALLY NEXT WEEK AND ANY ORGANIZED MARINE
LAYER WILL HAVE TROUBLE FORMING. SO EXPECT REALLY NICE WEATHER WITH
A WARMING TREND SUNDAY AND MONDAY. AS THIS RIDGE OF HIGH PRESSURE
AMPLIFIES ALONG THE WEST COAST...A COLD AIR MASS OVER THE ROCKIES
WILL SEND SOME OFFSHORE FLOW OUR WAY. THIS WILL BOOST MAX TEMPS IN
OUR REGION TUESDAY AND WEDNESDAY. 90S WILL BE COMMON AT LOWER
ELEVATIONS AND EVEN 80S AT THE COAST. IT WILL BE HARD TO FIND CLOUDS
THEN TOO.

&&

.AVIATION...
240800Z...COAST/VALLEYS...MOSTLY CLEAR SKIES WITH UNRESTRICTED VIS
THROUGH 00Z THIS AFTERNOON...EXCEPT 12Z-16Z SCT-LCLLY BKN CIGS
1-1.5K FT MSL NEAR THE COAST...AND PATCHY GROUND FOG IN SOME OF THE
VALLEYS INCLUDING KRNM. LOW CONFIDENCE FOR TIMING OR DURATION OF
CIGS AT KSAN...IF ANY THIS MORNING. MVFR CIGS EXPECTED TO REFORM
ALONG THE COASTAL STRIP 00Z-03Z THIS EVENING AND SPREAD INLAND
OVERNIGHT.

MTNS/DESERTS...SCT CLOUDS AOA FL200 WITH UNRESTRICTED VIS THROUGH
TONIGHT.

&&

.MARINE...

NO MARINE ISSUES THROUGH MIDDAY FRIDAY.

FRI AFTERNOON THROUGH SAT...20-30 KT WINDS ARE LIKELY TO DEVELOP
OVER THE COASTAL WATERS...ACCOMPANIED BY A STEEP WNW SWELL. WINDS
COULD GUST TO GALE FORCE BRIEFLY SAT MORNING. CONFIDENCE IS HIGH
THIS WILL GENERATE TEN FOOT OR GREATER SEAS AND CONDITIONS HAZARDOUS
FOR SMALL CRAFT DURING THIS PERIOD.

A 3-4 FT LONG-PERIOD SOUTH SWELL THIS WEEKEND MAY PRODUCE HIGH SURF
CONDITIONS WITH SETS OF 7 TO 8 FT ALONG FAVORED SOUTH-FACING BEACHES
OF ORANGE COUNTY SAT-SUN. SLIGHTLY LOWER SURF FOR SAN DIEGO COUNTY
BEACHES...HOWEVER STRONG LONGSHORE AND RIP CURRENTS ARE LIKELY.

&&

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

&&

.SGX WATCHES/WARNINGS/ADVISORIES...NONE.

&&

$$

PUBLIC...MM
AVIATION/MARINE...JAD






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