Skip Navigation Links weather.gov 
NOAA logo - Click to go to the NOAA homepage National Weather Service   NWS logo - Click to go to the NWS homepage
The Weather Prediction Center
 
Tropical Discussion
 
(Latest Discussion - Issued 1254Z May 26, 2022)
 
Version Selection
Versions back from latest:  0   1   2   3   4   5   6   7   8   9   10   
 
Abbreviations and acronyms used in this product


TROPICAL DISCUSSION - INTERNATIONAL DESKS
NWS WEATHER PREDICTION CENTER COLLEGE PARK MD
854 AM EDT THU MAY 26 2022

PRELIMINARY DISCUSSION FOR PUERTO RICO AND THE USVI FROM MAY
26/12UTC: AN UPPER TROUGH TO THE NORTH OF THE ISLANDS IS
INTERACTING WITH A MOIST PLUME THAT EXTENDS FROM THE LEEWARD
ISLANDS INTO SOUTHERN HISPANIOLA. THIS HAS ESTABLISHED AN ENHANCED
UPPER DIVERGENT PATTERN OVER PUERTO RICO AND THE VI ON THURSDAY
MORNING. SATELLITE IMAGERY SHOWS AN INCREASE IN MID-LEVEL AND
UPPER-LEVEL CLOUDS...AND THE SAN JUAN RADAR CONFIRMS THE PRESENCE
OF SHOWERS IN NORTHEAST PUERTO RICO AND IN THE VI.

THE UPPER TROUGH IS FORECAST TO START LIFTING ON THURSDAY...WHICH
WILL FAVOR A DECREASE IN ACCUMULATIONS ON FRIDAY. THIS IS
SUPPORTED AS WELL BY THE ARRIVAL OF A DRIER AIR MASS IN THE
EASTERLY TRADES. ON SATURDAY...A TROUGH MEANDERING IN HISPANIOLA
IS FORECAST MOVE EAST INTO THE REGION...WHERE IT WILL LIKELY
PERSIST THROUGH SUNDAY. ON SATURDAY...HOWEVER...A DRY POCKET IN
THE EASTERLY TRADES MOVES IN...WHICH CONTINUE TO FAVOR
CONSERVATIVE RAINFALL AMOUNTS AND A GENERAL DECREASE IN
CLOUDINESS. THE TROUGH IS FORECAST TO LINGER INTO SUNDAY...WHEN A
MOISTER AIR MASS IS FORECAST TO ARRIVE IN THE EASTERLY TRADES. THE
PRESENCE OF A WEAK THERMAL INVERSION ON SUNDAY MORNING...WILL
DELAY THE ONSET OF DIURNAL CONVECTION IN INTERIOR PORTIONS OF
PUERTO RICO. THUS EXPECT THE LARGEST RAINFALL AMOUNTS IN EASTERN
PUERTO RICO AND THE VI. DURING THE AFTERNOON...EXPECT WETTER
CONDITIONS THAN SATURDAY. UNDER THE INFLUENCE OF
EAST-SOUTHEASTERLY TRADES...EXPECT CONVECTION TO CLUSTER IN
WESTERN AND NORTHWESTERN PUERTO RICO...TO SUSTAIN ISOLATED MAXIMA
NEAR 1 INCH.

GALVEZ...WPC (USA)