862
FXCA20 KWBC 271233
PMDCA
TROPICAL DISCUSSION - INTERNATIONAL DESKS
NWS WEATHER PREDICTION CENTER COLLEGE PARK MD
832 AM EDT WED MAR 27 2024
PRELIMINARY DISCUSSION FOR PUERTO RICO AND THE USVI MAR 27/12UTC:
A WEAKENING FRONTAL BOUNDARY WILL REMAIN NEARLY STATIONARY TO THE
EAST OF THE LOCAL ISLANDS THROUGH THE REST OF THE WORKWEEK. THIS
WILL ALLOW DRY AIR TO CONTINUE MOVING IN FROM THE NORTH AS A SFC
LOW DRIFTS SLOWLY OT THE SSE...CENTERING NEAR 26N/57W BY THURSDAY
EVENING. THEREFORE...MAINLY FAIR WEATHER IS EXPECTED THROUGH
FRIDAY. A COLD FRONT IS EXPECTED TO APPROACH THE LOCAL ISLANDS BY
LATE FRIDAY INTO SATURDAY...CAUSING MOISTURE TO INCREASE RAPIDLY
ON SATURDAY. THIS WILL ALSO CAUSE THE CHANCES OF RAINFALL TO
INCREASE SIGNIFICANTLY FOR THE WEEKEND.
THE DRY AIR MOVING IN WILL KEEP PRECIPITABLE WATER VALUES BELOW
NORMAL THROUGH FRIDAY AFTERNOON...WITH VALUES BETWEEN 0.7 AND 1.0
INCHES. ON SATURDAY...PRECIPITABLE WATER WILL INCREASE RAPIDLY
THROUGH THE DAY WITH THE APPROACHING FRONTAL BOUNDARY...THE LATEST
GUIDANCE SUGGESTING ABOVE NORMAL MOISTURE BY SATURDAY
EVENING...WITH VALUES PEAKING NEAR 1.6 INCHES.
THE MID AND UPPER LEVELS WILL HAVE A HIGH PRESSURE DOMINATING THE
CARIBBEAN REGION FOR THE NEXT SEVERAL DAYS...WHILE A MID TO UPPER
LEVEL LOW MEANDERS OVER THE WEST CENTRAL TROPICAL ATLANTIC THROUGH
THE END OF THE WORKWEEK. A WEAK UPPER LEVEL TROUGH COULD BE
APPROACHING THE NORTH CENTRAL CARIBBEAN THIS WEEKEND...WITH ITS
AXIS OVER HISPANIOLA BY SUNDAY AFTERNOON...BUT THE TROUGH IS NOT
AS DEFINED IN THE MID LEVELS.
THE 5-DAY RAINFALL TOTAL FORECAST SUGGESTS NEAR 0.50 INCHES FOR
NORTH AND EASTERN PR. NEAR 0.25 TO 0.50 INCHES ARE FORECAST FOR
THE USVI...VIEQUES AND CULEBRA. BETWEEN 0.10 AND 0.25 INCHES ARE
FORECAST FOR CENTRAL TO WESTERN PR.
ALAMO...WPC (USA)
CLICK HERE TO GO TO PREVIOUS BULLETINS.
Main Text Page