Area Forecast Discussion
Issued by NWS San Juan, PR

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FXCA62 TJSJ 290049 AAA
AFDSJU

AREA FORECAST DISCUSSION...UPDATED
NATIONAL WEATHER SERVICE SAN JUAN PR
849 PM AST WED JAN 28 2015

.SYNOPSIS...DEEP POLAR TROUGH WILL REMAIN THE DOMINANT WX FEATURE
THROUGH EARLY SAT. RIDGE OF HIGH PRES SFC AND ALOFT BUILDS LATE
SAT THROUGH THE MIDDLE OF NEXT WEEK.

&&

.DISCUSSION...MOISTURE WILL GRADUALLY DEEPEN DURING THE NEXT 36
HRS AS HEIGHTS FALL WITH APPROACH OF TROUGH OF LOW PRES. HOWEVER
IS NOT REALLY UNTIL FRI THAT MOISTURE IS AT ITS MAXIMUM AND
INSTABILITY THE GREATEST. WHILE THERE WILL BE SCT SHOWERS AND POSSIBLE
T-STORMS THU AFTERNOON THE GREATEST CHANCES OF PRECIP WOULD NOT BE
UNTIL FRI. SO BACKED OFF SOMEWHAT FROM THE NMRS CVRG FOR THU.
UNSETTLED WX REMAINS THROUGH SAT WITH RIDGE OF HIGH PRES
STRENGTHENING SUN THROUGH THE MIDDLE OF NEXT WEEK LEADING TO
BREEZY AND FAIR WX CONDITIONS.

&&

.AVIATION...MAINLY VFR CONDITIONS NEXT 24 HRS. WHILE SCT SHOWERS
AND POSSIBLE T-STORMS ARE EXPECTED THU AFTERNOON OVER SW
PR...THESE ARE LIKELY TO MISS THE AIRPORTS. UNSETTLED WX FRI AND
SAT WITH SCT T-STORMS AFFECTING WRN PR TERMINALS.

&&

. MARINE...NW SWELLS AFFECTING ATLC COASTAL WATERS WITH WAVE
HEIGHTS OF 5-6 FT POSSIBLY UP TO 7 FT. ISSUED SCA EARLIER BASED ON
SWELL DECAY FROM BUOY 41046. THE PEAK SHOULD BE OVERNIGHT THROUGH
THU MORNING THEN SWELLS SUBSIDING. HOWEVER...SEVERAL PULSES OF NNW
SWELLS WILL CONTINUE THROUGH THE WEEKEND. WINDS STRENGTHEN SUN
INTO MON WITH SCA CONDITIONS MORE LIKELY.

&&

.PRELIMINARY POINT TEMPS/POPS...
SJU  72  86  75  86 /  10  50  50  50
STT  76  78  77  83 /  10  50  50  50

&&

.SJU WATCHES/WARNINGS/ADVISORIES...
PR...NONE.
VI...NONE.
COASTAL WATERS...SMALL CRAFT ADVISORY UNTIL 6 PM AST THURSDAY FOR ATLC WATERS OF
     PUERTO RICO AND USVI FROM 10NM TO 19.5N.

&&

$$

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