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FXCA62 TJSJ 280133 AAA
AFDSJU

AREA FORECAST DISCUSSION...UPDATED
NATIONAL WEATHER SERVICE SAN JUAN PR
933 PM AST TUE JAN 27 2015

.SYNOPSIS...DEEP POLAR TROUGH OVER THE WRN ATLC WILL BECOME THE
DOMINANT WX FEATURE THROUGH THE END OF THE WEEK. RIDGING SFC AND
ALOFT WILL BUILD OVR THE REGION EARLY NEXT WEEK.

&&

.DISCUSSION...DRY AIR WILL MOVE INTO THE REGION TONIGHT. CLEAR
SKIES COUPLED WITH WET SOILS FROM SHOWERS TODAY WILL LIKELY
RESULT IN AREAS OF FOG OVER VALLEYS. MOISTURE INCREASES RAPIDLY
LATE WED INTO THU AS HEIGHT FALLS PROMOTE RAPID MOISTURE TRANSPORT
AND SUBSIDENCE INVERSION WEAKENS. APPROACHING SHEAR LINE ON THU
WILL FOCUS SHOWERS AND T-STORMS OVER SOUTHWEST PR AS STEERING
WINDS BECOME FROM THE NORTHEAST ALBEIT WEAK. VERY COLD H5 TEMPS OF
-10C AND MID-LEVEL DRYING ON FRI WILL AUGMENT/ENHANCE THE RISK FOR
HAIL FORMATION IN T-STORMS FRI. SLOW DRYING TREND BEGINS SAT AS
HEIGHTS BEGIN TO RISE AND SUBSIDENCE INVERSION GRADUALLY
STRENGTHENS. FAIR WEATHER CONDITIONS EXPECTED ALL OF NEXT WEEK AS
RIDGE BUILDS/STRENGTHENS SFC AND ALOFT. STRENGTHENING TRADES WILL
ALSO LEAD TO DRYING CONDITIONS WITH FIRE RISK INCREASING FOR AREAS
THAT DO NOT RECEIVE ANY RAINS THU AND FRI.

&&

.AVIATION...VFR CONDITIONS WILL PREVAIL ACROSS THE FORECAST AREA FOR
THE NEXT 24 HRS. -SHRA WITH CLOUDINESS MAINLY HIGH CLOUDS STILL
POSSIBLE OVER/VCNTY OF JBQ/JMZ/JPS AT LEAST UNTIL 28/03Z. LIGHT TO
CALM WINDS OVERNIGHT...AFT 28/14Z E TO ESE WINDS AT 5 TO 15 KNOTS
WITH SEA BREEZE VARIATIONS.

&&

.MARINE...WINDS BELOW 15 KT THROUGH SAT THEN STRENGTHEN TO 20 KT
ALL OF NEXT WEEK. SEAS 3-5 FT BUILDING TO 6 FT NEXT WEEK.

&&

.PRELIMINARY POINT TEMPS/POPS...
SJU  75  86  73  85 /  10  40  40  40
STT  77  83  74  84 /  10  40  40  40

&&

.SJU WATCHES/WARNINGS/ADVISORIES...
PR...NONE.
VI...NONE.
COASTAL WATERS...NONE.
&&

$$

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