Area Forecast Discussion
Issued by NWS San Juan, PR

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FXCA62 TJSJ 211827
AFDSJU

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE SAN JUAN PR
227 PM AST SUN DEC 21 2014

.SYNOPSIS...A FAIR AND STABLE WEATHER PATTERN WILL CONTINUE TO
PREVAIL ACROSS THE LOCAL ISLANDS DURING THE NEXT SEVERAL DAYS AS
RIDGE ALOFT HOLDS ACROSS THE CARIBBEAN INTO THE WESTERN TROPICAL
ATLANTIC.

&&

.DISCUSSION...MOSTLY SUNNY SKIES PREVAILED ACROSS THE LOCAL ISLANDS
THROUGH THE DAY...WITH BRIEF PASSING SHOWERS OBSERVED OVER THE
CARIBBEAN WATERS SOUTH OF SAINT CROIX. WINDS WERE FROM THE NORTHEAST
AT 15 TO 20 MPH...WITH COASTAL TEMPERATURES IN THE MID 80S. A FAIR
AND STABLE WEATHER PATTERN WILL CONTINUE TO PREVAIL ACROSS THE
LOCAL ISLANDS DURING THE NEXT SEVERAL DAYS UNDER SUBSIDENCE ALOFT
AND BELOW TO NORMAL PRECIPITABLE WATER. ALTHOUGH...SHALLOW LOW
LEVEL MOISTURE EMBEDDED IN THE TRADES WILL RESULT IN ISOLATED TO
LOCALLY SCATTERED PASSING SHOWERS ACROSS WINDWARD AREAS FROM TIME
TO TIME. LATEST GUIDANCE INDICATED BEST MOISTURE ADVECTION STILL
EXPECTED ON TUESDAY. THE AFOREMENTIONED SUBSIDENCE ALOFT SHOULD
LIMIT AFTERNOON CONVECTION...EACH DAY...IF ANY...EXCEPT TUESDAY
AS MOISTURE REESTABLISHES TO NEAR NORMAL VALUES. FRESH NORTHEASTERLY
TRADES WILL CONTINUE THROUGH TONIGHT...BECOMING MORE EASTERLY
MONDAY THROUGH AT LEAST WEDNESDAY WITH NORTHEASTERLY WINDS RETURNING
ONCE AGAIN BY THE END OF THE WORKWEEK.

&&

.AVIATION...VFR CONDITIONS WILL CONTINUE...WITH OCCASIONAL PASSING
-SHRA EXPECTED AT TIST/TJSJ/TISX/TNCM/TKPK TONIGHT. NO SIGNIFICANT
WEATHER EVENT IS EXPECTED. E WIND FLOW AT 5 TO 20 KT WITH HIGHER
GUST...TURNING LIGHT TO CALM AND VARIABLE OVERNIGHT.

&&

.MARINE...A MODERATE TO FRESH NORTHEASTERLY WIND FLOW WILL PREVAIL
THROUGH TONIGHT...BECOMING MORE EASTERLY MON AND TUE. NORTHEASTERLY
WINDS WILL RETURN BY THE END OF THE WORKWEEK WITH NORTHEASTERLY
SWELLS INVADING OUR WATERS.

&&

.PRELIMINARY POINT TEMPS/POPS...
SJU  74  83  74  84 /  30  20  40  40
STT  74  85  74  85 /  30  20  40  40

&&

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

$$

27/23




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