157  
FGCA72 TJSJ 060832  
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-  
020-030-061600-  
 
HYDROLOGIC OUTLOOK  
NATIONAL WEATHER SERVICE SAN JUAN PR  
432 AM AST MON APR 6 2020  
 
...SPRING FLOOD POTENTIAL OUTLOOK FOR PUERTO RICO AND THE U.S.  
VIRGIN ISLANDS...  
 
...THE FLOOD RISK IS NEAR NORMAL FOR PUERTO RICO AND THE U.S. VIRGIN  
ISLANDS...  
 
CURRENT HYDROLOGIC CONDITIONS...  
 
STREAMFLOWS AND RESERVOIRS...THE 28-DAY STREAMFLOW MEASURED BY THE  
U.S. GEOLOGICAL SURVEY (USGS) GAGING NETWORK SHOWS MOST LOCATIONS  
ACROSS PUERTO RICO RUNNING ABOVE THE 75 PERCENTILE, WHICH IS ABOVE  
THE NORMAL RANGE. THERE ARE NO STREAMFLOW DATA AVAILABLE FOR THE  
U.S. VIRGIN ISLANDS. USGS GAGING SITES INDICATE AS WELL MAJOR  
RESERVOIRS IN OPTIMUM CONDITIONS.  
 
RAINFALL...THE 30- AND 60-DAY RAINFALL TOTALS INDICATE A SURPLUS  
ACROSS NORTH-CENTRAL AND NORTHEAST PUERTO RICO AS WELL AS OVER  
THE SOUTHWESTERN TIP OF THE ISLAND. ELSEWHERE, NEAR NORMAL  
RAINFALL HAS BEEN OBSERVED, INCLUDING OVER THE U.S. VIRGIN  
ISLANDS. THE 30-DAY RAINFALL SURPLUS ACROSS NORTHEAST PUERTO RICO  
IS RANGING BETWEEN 8 TO 10 INCHES.  
 
SOIL MOISTURE...BASED ON DATA RETRIEVED FROM THE PUERTO RICO  
AGRICULTURAL WATER MANAGEMENT (PRAGWATER), THERE IS A LACK IN  
SOIL MOISTURE ACROSS SOUTH-CENTRAL AND SOUTHEAST PUERTO RICO,  
WHICH IS CONSISTENT WITH THE RAINFALL PATTERN OBSERVED.  
 
METEOROLOGICAL OUTLOOK...  
 
THE LATEST SEASONAL OUTLOOK ISSUED BY THE CARIBBEAN REGIONAL CLIMATE  
OUTLOOK HAS A FORECAST OF NEAR TO SLIGHTLY BELOW NORMAL RAINFALL  
THROUGH SUMMER 2020, WITH CHANCES INCREASING BY THE FALL.  
 
HYDROLOGIC OUTLOOK...  
 
CONSIDERING THE EXPECTED RAINFALL AND THE OBSERVED CONDITIONS, THE  
FLOOD RISK IS NEAR NORMAL ACROSS THE LOCAL ISLANDS.  
 

 
 
RELATED WEBSITES...  
 
NWS WFO SAN JUAN, HYDROLOGY AND RIVER CONDITIONS:  
HTTPS://WWW.WEATHER.GOV/SJU/IDSS_HYDRO  
 
NWS WFO SAN JUAN, CLIMATE AND DROUGHT:  
HTTPS://WWW.WEATHER.GOV/SJU/DSS_CLIMO  
 
PUERTO RICO AGRICULTURAL WATER MANAGEMENT: HTTPS://PRAGWATER.COM  
 
USGS CARIBBEAN-FLORIDA WATER SCIENCE CENTER: HTTP://PR.WATER.USGS  
 
QUESTIONS AND COMMENTS...  
 
IF YOU HAVE ANY QUESTIONS OR COMMENTS ABOUT THE SPRING FLOOD  
OUTLOOK, PLEASE CONTACT  
 
NWS SAN JUAN 787-253-4586  
 

 
 
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