030  
FGCA72 TJSJ 161646  
ESFSJU  
PRC001-003-005-007-009-011-013-015-017-019-021-023-025-027-029-031-  
033-035-037-039-041-043-045-047-049-051-053>055-057-059-061-063-065-  
067-069-071-073-075-077-079-081-083-085-087-089-091-093-095-097-099-  
101-103-105-107-109-111-113-115-117-119-121-123-125-127-129-131-133-  
135-137-139-141-143-145-147-149-151-153-VIC010-020-030-162200-  
 
HYDROLOGIC OUTLOOK  
NATIONAL WEATHER SERVICE SAN JUAN PR  
1246 PM AST FRI MAY 16 2025  
 
...THE RISK OF FLOODING CONTINUES FOR PUERTO RICO AND THE VIRGIN  
ISLANDS THROUGH SATURDAY...  
 
AN UPPER-LEVEL TROUGH MOVING ACROSS THE DOMINICAN REPUBLIC, COMBINED  
WITH ABUNDANT MOISTURE, WILL RESULT IN THE DEVELOPMENT OF SHOWERS  
AND THUNDERSTORMS ACROSS THE LOCAL ISLANDS TODAY AND SATURDAY.  
 
TODAY, SHOWERS ARE EXPECTED TO DEVELOP ACROSS THE ISLANDS, WITH THE  
HIGHEST ACCUMULATIONS ACROSS THE INTERIOR, WEST AND NORTHWEST PUERTO  
RICO. THEN, TONIGHT, AS THE TROUGH CROSSES THE REGION, THE SHOWERS  
AND THUNDERSTORMS WILL SPREAD ACROSS THE EASTERN HALF OF PUERTO  
RICO, INCLUDING VIEQUES AND CULEBRA, AND ALSO OVER THE VIRGIN  
ISLANDS. THIS ACTIVITY IS EXPECTED TO CONTINUE ON SATURDAY TOO, BUT  
THE WEATHER IS EXPECTED TO IMPROVE ON SUNDAY, AS THE TROUGH DEPARTS  
TOWARD THE OPEN ATLANTIC WATERS.  
 
BASED ON THE LATEST GUIDANCE, THERE IS A MODERATE CONFIDENCE IN THE  
FORECAST (40-60%), AND THE RAINFALL AMOUNTS ARE STILL EXPECTED TO  
RANGE FROM 2 TO 4 INCHES WITH LOCALLY HIGHER AMOUNTS.  
 
DUE TO ALREADY SATURATED SOILS AND RIVERS AND TRIBUTARIES RUNNING  
WELL ABOVE NORMAL LEVELS, THERE IS A RISK FOR FLOODING ACROSS PUERTO  
RICO AND THE VIRGIN ISLANDS THROUGH SATURDAY. ADDITIONAL IMPACTS  
INCLUDE LANDSLIDE, URBAN, AND FLASH FLOOD IN AREAS WITH THE HEAVIEST  
AMOUNT OF RAINFALL.  
 

 
 
ERG  
 
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