060  
FLCA42 TJSJ 191328  
HWOSJU  
 
HAZARDOUS WEATHER OUTLOOK  
NATIONAL WEATHER SERVICE SAN JUAN PR  
919 AM AST WED SEP 19 2018  
 
AMZ710>745-PRZ001>013-201330-  
SAN JUAN AND VICINITY-NORTHEAST-SOUTHEAST-EASTERN INTERIOR-  
NORTH CENTRAL-CENTRAL INTERIOR-PONCE AND VICINITY-NORTWEST-  
WESTERN INTERIOR-MAYAGUEZ AND VICINITY-SOUTHWEST-CULEBRA-VIEQUES-  
THE NEARSHORE AND OFF SHORE ATLANTIC AND CARIBBEAN COASTAL WATERS-  
919 AM AST WED SEP 19 2018  
 
THIS HAZARDOUS WEATHER OUTLOOK IS FOR PUERTO RICO AND THE ADJACENT  
ATLANTIC COASTAL WATERS.  
   
DAY ONE
 
TODAY AND TONIGHT  
   
THUNDERSTORMS
 
THERE IS A CHANCE OF THUNDERSTORMS WITH HEAVY  
RAINFALL AND BRIEF GUSTY WINDS THIS AFTERNOON ACROSS PORTIONS OF  
WESTERN PUERTO RICO.  
   
FLOODING
 
HEAVY RAINS COULD LEAD TO URBAN AND SMALL STREAM  
FLOODING.  
   
WIND
 
SUSTAINED WINDS IN EXCESS OF 20 MPH ARE EXPECTED ACROSS  
THE COASTAL WATERS OF NORTHERN AND SOUTHERN PUERTO RICO.  
   
RIP CURRENTS
 
THERE IS A MODERATE RISK OF RIP CURRENTS FOR THE  
NORTHERN AND SOUTHERN BEACHES OF THE ISLANDS.  
   
HEAT
 
HEAT INDEX BETWEEN 100-105 DEGREES IS EXPECTED ACROSS THE  
COASTAL AREAS OF THE ISLANDS.  
   
DAYS TWO THROUGH SEVEN
 
THURSDAY THROUGH TUESDAY  
 
A STRONG HIGH PRESSURE SYSTEMS WILL SUPPRESS AFTERNOON CONVECTION  
ACROSS MOST OF PUERTO RICO THROUGH FRIDAY, EXCEPT FOR THE WESTERN AND  
INTERIOR AREAS OF PUERTO RICO. SHOWERS ARE POSSIBLE OVER THE WESTERN  
AND INTERIOR PORTIONS OF PUERTO RICO AS A RESULT OF LOCAL AND DIURNAL  
EFFECTS. A DRY SAHARAN AIR MASS WILL FILTER IN FROM THE EAST ON  
THURSDAY AND FRIDAY AND CAUSE HAZY CONDITIONS OVER THE AREA. MOISTURE  
IS EXPECTED TO RETURN LATE SUNDAY AND EARLY MONDAY THUS AN INCREASE IN  
SHOWERS AND ISOLATED THUNDERSTORMS IS EXPECTED. MODERATE RISK OF RIP  
CURRENTS IS EXPECTED TO CONTINUE FOR MOST OF THE AREA.  
   
SPOTTER INFORMATION STATEMENT
 
 
WIDESPREAD SPOTTER ACTIVATION IS NOT ANTICIPATED, HOWEVER INDIVIDUAL  
SPOTTER ARE ENCOURAGED TO REPORT FLOODING AND RIP CURRENTS TO THE  
NATIONAL WEATHER SERVICE IN SAN JUAN.  
 

 
 
AMZ715-725-VIZ001-002-201330-  
ST. THOMAS ST. JOHN ADJACENT ISLANDS-ST CROIX-  
NEARSHORE ATLANTIC AND ADJACENT CARIBBEAN COASTAL WATERS-  
919 AM AST WED SEP 19 2018  
 
THIS HAZARDOUS WEATHER OUTLOOK IS FOR THE U.S. VIRGIN ISLANDS AND THE  
ADJACENT COASTAL WATERS.  
   
DAY ONE
 
TODAY AND TONIGHT  
   
RIP CURRENTS
 
THERE IS A MODERATE RISK OF RIP CURRENTS FOR  
THE NORTH, EAST AND SOUTHERN BEACHES OF ST. CROIX.  
   
HEAT
 
HEAT INDEX BETWEEN 100-103 DEGREES IS EXPECTED ACROSS PORTIONS  
OF THE COASTAL AREAS OF THE ISLANDS.  
   
DAYS TWO THROUGH SEVEN
 
THURSDAY THROUGH TUESDAY  
 
A STRONG HIGH PRESSURE SYSTEM WILL SUPPRESS AFTERNOON CONVECTION  
ACROSS THE U.S. VIRGIN ISLANDS THROUGH FRIDAY. A DRY SAHARAN AIR MASS  
WILL FILTER IN FROM THE EAST ON THURSDAY AND FRIDAY AND CAUSE HAZY  
CONDITIONS OVER THE AREA. MOISTURE IS EXPECTED TO RETURN LATE SUNDAY  
AND EARLY MONDAY THUS AN INCREASE IN SHOWERS AND ISOLATED  
THUNDERSTORMS IS EXPECTED. MODERATE RISK OF RIP CURRENTS IS EXPECTED  
TO CONTINUE FOR THE NEXT SEVERAL DAYS.  
 
   
SPOTTER INFORMATION STATEMENT
 
 
WIDESPREAD SPOTTER ACTIVATION IS NOT ANTICIPATED, HOWEVER INDIVIDUAL  
SPOTTER ARE ENCOURAGED TO REPORT RIP CURRENTS TO THE NATIONAL WEATHER  
SERVICE IN SAN JUAN.  
 

 
 
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