068  
FLCA42 TJSJ 180826  
HWOSJU  
 
HAZARDOUS WEATHER OUTLOOK  
NATIONAL WEATHER SERVICE SAN JUAN PR  
426 AM AST MON OCT 18 2021  
 
AMZ710>745-PRZ001>013-190830-  
SAN JUAN AND VICINITY-NORTHEAST-SOUTHEAST-EASTERN INTERIOR-  
NORTH CENTRAL-CENTRAL INTERIOR-PONCE AND VICINITY-NORTHWEST-  
WESTERN INTERIOR-MAYAGUEZ AND VICINITY-SOUTHWEST-CULEBRA-VIEQUES-  
THE NEARSHORE AND OFF SHORE ATLANTIC AND CARIBBEAN COASTAL WATERS-  
426 AM AST MON OCT 18 2021  
 
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 MUCH OF THE  
ISLANDS, BUT ESPECIALLY INTERIOR PUERTO RICO.  
   
FLOODING
 
HEAVY RAINS COULD LEAD TO URBAN AND SMALL STREAM  
FLOODING. THERE IS ALSO THE POTENTIAL FOR RAPID RIVER RISES AND  
MUDSLIDES.  
   
HEAT
 
HEAT INDICES BETWEEN 100 AND 105 ARE ANTICIPATED FOR PORTIONS  
OF THE LOW-ELEVATIONS AREAS.  
   
DAYS TWO THROUGH SEVEN
 
TUESDAY THROUGH SUNDAY  
 
THUNDERSTORMS ARE EXPECTED DURING THE AFTERNOONS, AND WILL LEAD TO AN  
ENHANCED RISK OF FLOODING, THOUGH DRYING IS EXPECTED LATE IN THE WEEK,  
DECREASING THE RISK. HEAT INDICES NEAR OR IN EXCESS OF 102F ARE  
POSSIBLE AT LOWER ELEVATIONS EACH DAY. RIP CURRENT RISK IS EXPECTED TO  
INCREASE, WITH SOME BEACHES HAVING A MODERATE RISK BY MIDWEEK,  
ESPECIALLY ALONG THE NORTH COASTS.  
   
SPOTTER INFORMATION STATEMENT
 
 
SPOTTER ACTIVATION IS NOT ANTICIPATED. PLEASE RELAY ANY INFORMATION  
ABOUT WINDS, WAVES, AND RIP CURRENTS TO THE NATIONAL WEATHER SERVICE  
IN SAN JUAN WHILE FOLLOWING ALL LOCAL AND STATE GUIDELINES.  
 

 
 
AMZ715-725-VIZ001-002-190830-  
ST. THOMAS ST. JOHN ADJACENT ISLANDS-ST CROIX-  
NEARSHORE ATLANTIC AND ADJACENT CARIBBEAN COASTAL WATERS-  
426 AM AST MON OCT 18 2021  
 
THIS HAZARDOUS WEATHER OUTLOOK IS FOR THE U.S. VIRGIN ISLANDS AND THE  
ADJACENT COASTAL WATERS.  
   
DAY ONE
 
TODAY AND TONIGHT  
   
THUNDERSTORMS
 
THERE IS A CHANCE OF THUNDERSTORMS WITH HEAVY  
RAINFALL AND BRIEF GUSTY WINDS THIS AFTERNOON ACROSS THE LOCAL ISLANDS  
LATE THIS AFTERNOON AND EVENING.  
   
FLOODING
 
HEAVY RAINS COULD LEAD TO URBAN AND GUT FLOODING.  
   
DAYS TWO THROUGH SEVEN
 
TUESDAY THROUGH SUNDAY  
 
THUNDERSTORMS ARE POSSIBLE DURING THE AFTERNOONS THROUGH MIDWEEK, AND  
COULD CAUSE SOME URBAN AND GUT FLOODING. RIP CURRENT RISK WILL  
INCREASE AROUND MIDWEEK, AND RISK WILL BE MODERATE BY THURSDAY ACROSS  
MOST LOCAL BEACHES.  
   
SPOTTER INFORMATION STATEMENT
 
 
SPOTTER ACTIVATION IS NOT ANTICIPATED. PLEASE RELAY ANY INFORMATION  
ABOUT WINDS, WAVES, AND RIP CURRENTS TO THE NATIONAL WEATHER SERVICE  
IN SAN JUAN WHILE FOLLOWING ALL LOCAL AND STATE GUIDELINES.  
 

 
 
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