351  
AWCA82 TJSJ 230831  
RWSPR  
 
WEATHER SUMMARY FOR PUERTO RICO  
NATIONAL WEATHER SERVICE SAN JUAN PR  
431 AM AST SUN JUL 23 2017  
 
PARTLY CLOUDY SKIES PREVAILED ACROSS THE LOCAL ISLANDS DURING THE  
OVERNIGHT HOURS. A FEW PASSING SHOWERS MOVED INLAND EARLY IN THE  
EVENING WITH NO SIGNIFICANT RAIN ACCUMULATIONS OBSERVED. ALTHOUGH  
THE ACTIVITY DECREASED SIGNIFICANTLY AROUND MIDNIGHT, SHOWERS  
STARTED TO DEVELOP ONCE AGAIN AND MOVED OVER PORTIONS OF THE  
EASTERN HALF OF PR AFTER 2 AM AST. OVERNIGHT LOW TEMPERATURES WERE  
IN THE UPPER 70S TO LOW 80S ACROSS THE LOWER ELEVATIONS TO THE  
UPPER 60S TO MID 70S ACROSS THE HIGHER ELEVATIONS UNDER AN EAST  
TO SOUTHEAST WIND FLOW AT 10 MPH OR LESS.  
 
AS THE TROPICAL WAVE CONTINUES TO MOVE FARTHER AWAY, A DRIER MASS WILL  
ENCOMPASS THE FORECAST AREA RESULTING IN AN IMPROVEMENT OF THE  
LOCAL WEATHER CONDITIONS TODAY INTO MONDAY MORNING. HOWEVER,  
LINGERING LOW-LEVEL MOISTURE COMBINED WITH THE LOCAL AND DIURNAL  
EFFECTS WILL RESULT IN THE DEVELOPMENT OF SHOWERS AND  
THUNDERSTORMS ACROSS THE INTERIOR AND WESTERN PR, AND POSSIBLY  
OVER THE SAN JUAN METROPOLITAN AREA WITHIN THE SAN JUAN STREAMER  
THIS AFTERNOON. URBAN AND SMALL STREAM FLOODING MAY OCCUR WITH THE  
STRONGEST ACTIVITY. AFTERNOON HIGH TEMPERATURES WILL RANGE BETWEEN  
THE UPPER 80S TO LOW 90S WITH HEAT INDICES POSSIBLY REACHING THE  
102 TO 107 DEGREES ALONG COASTAL AREAS OF SOUTHERN, WESTERN, AND  
NORTHERN PR. DRIER AND HAZY CONDITIONS ARE EXPECTED ON MONDAY AND  
TUESDAY AS THE DRIER MASS ACCOMPANIED BY SAHARAN DUST CONTINUES TO  
FILTER INTO THE FORECAST AREA.  
 
ACROSS THE REGIONAL WATERS...SEAS UP TO 5 FEET AND EASTERLY WINDS  
UP TO 15 KNOTS ARE EXPECTED FOR THE NEXT SEVERAL DAYS. A MODERATE  
RISK OF RIP CURRENTS CONTINUES ACROSS THE NORTH AND SOUTHEAST  
COAST OF PUERTO RICO AND VIEQUES.  
 

 
 
THIS PRODUCT IS ISSUED AROUND 5 AM AND 5 PM EACH DAY AND WEATHER  
CONDITIONS MAY CHANGE BETWEEN ISSUANCES. PLEASE VERIFY THE STATUS  
OF ANY WATCHES...WARNINGS OR ADVISORIES MENTIONED IN THIS PRODUCT.  
 
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