644
FXCA20 KWBC 271248
PMDCA
TROPICAL DISCUSSION - INTERNATIONAL DESKS
NWS WEATHER PREDICTION CENTER COLLEGE PARK MD
747 AM EST WED DEC 27 2023
PRELIMINARY DISCUSSION FOR PUERTO RICO AND THE USVI DEC 27/12UTC:
OUT OF THE NEXT 5 DAYS IN THE FORECAST PERIOD...TODAY IS EXPECTED
OT BE THE DAY WITH THE HIGHEST RAINFALL ACCUMULATIONS...AND IT IS
FORECAST TO BE MOSTLY OVER THE HIGHER ELEVATIONS OF CENTRAL PR
INTO THE SOUTHERN SLOPES...AND AROUND THE LUQUILLO MOUNTAIN RANGE
IN NORTHEAST PR...WITH MAX VALUES BETWEEN 0.25 AND 0.5 INCHES.
EVEN LESS RAINFALL IS EXPECTED THEREAFTER...AND THEREFORE LIMITED
TO NO RAINFALL IS FORECAST OVER PR/USVI FROM THURSDAY ONWARD. AS
FAR AS THE USVI...VERY LITTLE RAINFALL IS FORECAST OVER THE
FORECAST PERIOD...WITH ONLY A FEW HUNDREDTHS TO NO RAIN IN THE
FORECAST EACH DAY.
THERE IS A SFC HIGH PRESSURE ACROSS THE CENTRAL ATLANTIC THAT WILL
MOVE NORTHEAST AND REACH THE NORTHEAST ATLANTIC BY
FRIDAY...MEANWHILE THERE ARE A COUPLE OF SFC LOW PRESSURE
SYSTEMS...A WEAK LOW PRESSURE IN THE CENTRAL TROPICAL ATLANTIC
THAT IS ALSO MOVING NORTHEAST...AND ONE THAT IS MOVING
NORTH-NORTHEAST ALONG THE EAST COAST OF THE U.S. AS IT
STRENGTHENS. THIS WILL CAUSE RELATIVELY LIGHT NORTHEASTERLY WINDS
OVER THE LOCAL ISLANDS FOR THE NEXT SEVERAL DAYS. THE MID AND
UPPER LEVELS WILL BE DOMINATED BY RIDGES OF HIGH PRESSURE...WHICH
WILL PROMOTE A STABLE ATMOSPHERE THROUGH THE FORECAST PERIOD. A
STRONG INVERSION NEAR 900 MB IS STILL EXPECTED TO PERSIST FROM
THURSDAY INTO THE WEEKEND. THE AVAILABLE MOISTURE OVER THE NEXT
SEVERAL DAYS IS FORECAST TO BE NEAR TO BELOW NORMAL. THE
PRECIPITABLE WATER WILL BE AROUND 1.0 AND 1.2 INCHES OVER THE NEXT
SEVERAL DAYS...EXCEPT FOR TODAY AND BRIEFLY ON FRIDAY...WHERE IT
WILL BE NEAR 1.4 INCHES.
THE 5-DAY TOTAL RAINFALL FORECAST SUGGESTS 0.50 TO 0.75 INCHES
ACROSS PORTIONS OF THE LUQUILLO MOUNTAIN RANGE IN NORTHEAST
PR...AND ALONG THE HIGHER ELEVATIONS OF CENTRAL PR TO THE SOUTHERN
SLOPES...MOST OF THIS RAIN BEING EXPECTED TODAY. THE
USVI...VIEQUES AND CULEBRA ARE FORECAST UNDER 0.25 INCHES OVER THE
5-DAY PERIOD.
ALAMO...WPC (USA)
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