873
FXCA20 KWBC 051232
PMDCA
TROPICAL DISCUSSION - INTERNATIONAL DESKS
NWS WEATHER PREDICTION CENTER COLLEGE PARK MD
831 AM EDT MON JUN 05 2023
PRELIMINARY DISCUSSION FOR PUERTO RICO AND THE USVI FROM JUN
05/12UTC: A SIGNIFICANT DECREASE IN MOISTURE AND SHOWER ACTIVITY
IS EXPECTED FOR THE NEXT FEW DAYS. DRIER AIR WITH SAHARAN DUST HAS
MOVED IN...WHICH WILL LIMIT SHOWER ACTIVITY SIGNIFICANTLY. THE
MODEL GUIDANCE IS SUGGESTING THAT PRECIPITABLE WATER VALUES WILL
QUICKLY DECREASE TODAY...REACHING 1.4 INCHES BY THIS
EVENING...WHICH IS BELOW NORMAL FOR THE TIME OF YEAR. THROUGH
THURSDAY...THE AVAILABLE MOISTURE WILL BE BELOW NORMAL...AS IN
NEAR THE 25TH PERCENTILE...BUT MOISTURE MAY INCREASE TO NEAR
NORMAL VALUES BY FRIDAY.
UPPER LEVEL SHORTWAVE TROUGH WILL MOVE THROUGH TODAY...BUT AN
UPPER LEVEL HIGH PRESSURE WILL PREVAIL OVER THE LOCAL AREA FROM
TUESDAY ONWARD. HOWEVER...THE MID LEVELS ARE STABLE...WITH HIGH
PRESSURE CAUSING SUBSIDENCE OVER THE LOCAL ISLANDS. A TRADE WIND
INVERSION IS FORECAST OVER THE NORTHEAST CARIBBEAN THROUGH THE
WORKWEEK.
OVERALL...A MUCH MORE BENIGN WEATHER PATTERN IS EXPECTED THIS WEEK
IN TERMS OF RAINFALL. A FEW BRIEF SHOWERS POSSIBLE IN THE EARLY
MORNING AND NIGHTTIME HOURS...BUT AFTERNOON CONVECTION WILL BE
LIMITED BOTH IN COVERAGE AND AMOUNT OF RAIN. THE 5-DAY RAINFALL
TOTALS ARE FORECAST TO BE AROUND 0.75 TO 1 INCH OF RAIN ACROSS
SOUTHEASTERN PUERTO RICO...JUST OVER A HALF AN INCH OVER
NORTHWESTERN PUERTO RICO...AND AROUND A QUARTER OF AN INCH OR LESS
FOR THE USVI.
ALAMO/ACOSTA...WPC (USA)
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