Prognostic Meteorological Discussion
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FXCA20 KWBC 181141
PMDCA

TROPICAL DISCUSSION - INTERNATIONAL DESKS
NWS WEATHER PREDICTION CENTER COLLEGE PARK MD
640 AM EST THU DEC 18 2014

PRELIMINARY DISCUSSION FOR PUERTO RICO AND THE USVI. BUILDING MID
LEVEL RIDGE IS TO DOMINATE FLOW PATTERN THROUGHOUT THE MEDIUM
RANGE PERIOD. EARLY IN THE CYCLE THE RIDGE IS TO CENTER ON A HIGH
OVER SOUTHERN MEXICO/NORTHERN CENTRAL AMERICA. THROUGH SATURDAY
EVENING THE HIGH RELOCATES TO THE NORTHEAST CARIBBEAN ISLANDS
WHILE RIDGE IS TO STRENGTHEN ITS FOOTHOLD ACROSS THE FORECAST
AREA. STRONG TRADE WINDS CAP IS EXPECTED TO PERSIST DURING THE
NEXT FEW DAYS...SUSTAINING LOW PWAT AMOUNTS AS SHALLOW MOISTURE
CONFINES TO BELOW 800 HPA.

AT LOW LEVELS...NORTHEASTERLY WINDS PREVAIL. BUT THESE ARE TO
GRADUALLY VEER TO THE EAST EARLY ON FRIDAY MORNING AS A SURFACE
HIGH RELOCATES ACROSS THE FLORIDA PENINSULA TO THE WESTERN
ATLANTIC. AS THE EASTERLIES REPLACE THE COOL/FRESH NORTHEASTERLY
FLOW...EXPECTING A DECREASE IN EARLY MORNING CONVECTION ACROSS THE
NORTHERN VI-ATLANTIC COASTAL WATERS OF PUERTO RICO. AS A
RESULT...GENERALLY FAIR WEATHER CONDITIONS ARE EXPECTED TO PREVAIL
THROUGH EARLY NEXT WEEK...WITH LIGHT CONVECTION (IF ANY) CONFINING
TO THE CORDILLERA CENTRAL.

JN BAPTISTE...MS (SAINT LUCIA)
NANDA...MDS (SURINAME)
DAVISON...WPC (USA)
$$





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