Area Forecast Discussion
Issued by NWS San Juan, PR

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000
FXCA62 TJSJ 200221 AAA
AFDSJU

AREA FORECAST DISCUSSION...UPDATED
NATIONAL WEATHER SERVICE SAN JUAN PR
1021 PM AST TUE AUG 19 2014

.SYNOPSIS...UPPER LEVEL RIDGE WILL BUILD OVERNIGHT THROUGH THE END
OF THE WEEK. LOW PRES EAST OF THE WINDWARD ISLANDS EXPECTED TO
ENTER THE ERN CARIB SEA LATE THU NIGHT AND MOVE INTO THE CNTRL
CARIB SAT.

&&

.DISCUSSION...POPCORN SHOWER AND T-STORM ACTIVITY WILL CONTINUE
OVERNIGHT WITH MID-LEVEL DRYING EXPECTED WED WITH AREAL CVRG OF
SHOWERS DIMINISHING. MOISTURE ASSOCIATED WITH NEXT TROPICAL WAVE
AND LOW PRES WILL SPREAD ACROSS THE AREA THU WITH SHOWER CVRG
INCREASING. WX CONDITIONS LIKELY TO DETERIORATE RAPIDLY BEGINNING
THU NIGHT WITH WINDS AND SQUALLS INCREASING. TROPICAL CYCLONE
CONDITIONS POSSIBLE DURING THIS TIME. PLEASE REFER TO TROPICAL WX
OTLKS FROM NHC. SIGNIFICANT HEAVY RAINFALL THREAT WITH THIS SYSTEM.

&&

.AVIATION...VFR CONDITIONS EXPECTED ACROSS ALL TERMINALS THROUGH
THE FCST PERIOD. HOWEVER...VCSH WILL CONTINUE THROUGH THE OVERNIGHT
AND EARLY MORNING HOURS ACROSS MOST OF THE TERMINALS. BETWEEN
20/16-21Z...TSRA/SHRA IS EXPECTED OVER THE WESTERN INTERIOR OF
PR...AFFECTING AREAS IN AND AROUND TJMZ AND TJBQ WITH BRIEF MVFR
CONDS AND MTN TOP OBSCURATIONS. THE 20/00Z TJSJ SOUNDING INDICATED
E-NE WINDS AT 6-26 KTS FM THE SFC TO AROUND 6 KFT.

&&

.MARINE...WINDS NEAR 15KT THRU THU MORNING. WINDS STRENGTHENING
THU AFTERNOON WITH TROPICAL CYCLONE CONDITIONS POSSIBLE THU NIGHT
THROUGH FRI NIGHT. RAISED WINDS 20-25 KT AND SEAS 6-8 FT DURING
THIS PERIOD.


&&

.PRELIMINARY POINT TEMPS/POPS...
SJU  79  89  78  91 /  40  40  30  30
STT  78  89  79  91 /  40  40  30  30

&&

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

$$

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