600
FLCA42 TJSJ 160824
HWOSJU
HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE SAN JUAN PR
424 AM AST TUE SEP 16 2025
AMZ711>745-PRZ001>013-171000-
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-
424 AM AST TUE SEP 16 2025
THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF PUERTO RICO.
DAY ONE
TODAY AND TONIGHT
LIGHTNING
ISOLATED THUNDERSTORMS ARE EXPECTED. STAY ALERT AND
BE PREPARED TO TAKE SHELTER IF STORMS DEVELOP.
EXCESSIVE RAINFALL
FLOODING IN URBAN AREAS, ROADS, SMALL
STREAMS, AND WASHES, ESPECIALLY ACROSS THE INTERIOR AND WESTERN
PUERTO RICO IN THE AFTERNOON. THERE IS A LOW CHANCE OF ISOLATED
FLASH FLOODS AND LANDSLIDES, ESPECIALLY WHERE SOILS ARE ALREADY
SATURATED. ELSEWHERE, BRIEF PONDING ON ROADS AND POOR DRAINAGE
AREAS IS POSSIBLE, ESPECIALLY OVER EASTERN PUERTO RICO TONIGHT.
EXCESSIVE HEAT
DANGEROUS HEAT CONTINUES TODAY. THIS LEVEL OF
HEAT AFFECTS MOST PEOPLE SENSITIVE TO HIGH TEMPERATURES,
ESPECIALLY THOSE WITHOUT EFFECTIVE COOLING OR HYDRATION. THE
GREATEST RISK IS FOR THE ELDERLY, CHILDREN, AND THOSE WITH MEDICAL
CONDITIONS. SOME HEALTH SYSTEMS AND HEAT-SENSITIVE INDUSTRIES MAY
ALSO BE IMPACTED. THESE CONDITIONS ARE MOST LIKELY ACROSS URBAN
AND COASTAL AREAS OF PUERTO RICO, VIEQUES, AND CULEBRA.
WIND
BREEZY CONDITIONS (18–22 KTS / 21–25 MPH) ARE EXPECTED,
ESPECIALLY ALONG EXPOSED COASTAL AREAS. SECURE LOOSE ITEMS THAT
MAY BE BLOWN AROUND.
MARINE CONDITIONS
SMALL CRAFT SHOULD EXERCISE CAUTION,
PARTICULARLY ACROSS THE OFFSHORE ATLANTIC WATERS,
RIP CURRENTS
LIFE-THREATENING RIP CURRENTS ARE POSSIBLE IN THE
SURF ZONE, PARTICULARLY ACROSS NORTHERN AND EASTERN PUERTO RICO,
VIEQUES, AND CULEBRA. ISOLATED STRONGER RIP CURRENTS MAY OCCUR
ELSEWHERE, ESPECIALLY NEAR PIERS, JETTIES, AND CHANNELS.
DAYS TWO THROUGH SEVEN
WEDNESDAY THROUGH MONDAY
A TROPICAL WAVE INTERACTING WITH AN UPPER-LEVEL TROUGH WILL BRING
MORE SHOWERS AND THUNDERSTORMS WEDNESDAY AND THURSDAY, INCREASING
THE RISK OF FLOODING AND LANDSLIDES, ESPECIALLY WHERE SOILS ARE
ALREADY SATURATED. THIS RISK WILL PERSIST EACH AFTERNOON BEYOND
THURSDAY, MAINLY ACROSS THE INTERIOR AND WEST. STRONGER WINDS ON
WEDNESDAY WILL ALSO KEEP SEAS CHOPPY ACROSS THE OFFSHORE ATLANTIC
WATERS. MODERATE RIP CURRENT RISK WILL HOLD THROUGH THE WEEKEND,
WHILE HEAT CONCERNS CONTINUE, WITH THE MOST DANGEROUS CONDITIONS
EXPECTED FRIDAY INTO THE WEEKEND WHEN RAINFALL IS LESS FREQUENT.
SPOTTER INFORMATION STATEMENT
SPOTTER ACTIVATION IS ENCOURAGED. PLEASE RELAY ANY INFORMATION
ABOUT FLOODING, WINDS, WAVES, AND RIP CURRENTS TO THE NATIONAL
WEATHER SERVICE IN SAN JUAN.
AMZ716-726-VIZ001-002-171000-
ST. THOMAS ST. JOHN ADJACENT ISLANDS-ST CROIX-
NEARSHORE ATLANTIC AND ADJACENT CARIBBEAN COASTAL WATERS-
424 AM AST TUE SEP 16 2025
THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF USVI.
DAY ONE
TODAY AND TONIGHT
LIGHTNING
ISOLATED THUNDERSTORMS ARE EXPECTED. STAY ALERT AND
BE PREPARED TO TAKE SHELTER IF STORMS DEVELOP.
EXCESSIVE RAINFALL
PONDING OF WATER IN ROADS AND POORLY
DRAINED AREAS. THERE IS A LOW CHANCE OF LOCALIZED URBAN AND SMALL
STREAMS FLOODING.
EXCESSIVE HEAT
DANGEROUS HEAT CONTINUES TODAY. THIS LEVEL OF
HEAT AFFECTS MOST PEOPLE SENSITIVE TO HIGH TEMPERATURES,
ESPECIALLY THOSE WITHOUT EFFECTIVE COOLING OR HYDRATION. THE
GREATEST RISK IS FOR THE ELDERLY, CHILDREN, AND THOSE WITH MEDICAL
CONDITIONS. SOME HEALTH SYSTEMS AND HEAT-SENSITIVE INDUSTRIES MAY
ALSO BE IMPACTED.
MARINE CONDITIONS
SMALL CRAFT SHOULD EXERCISE CAUTION,
PARTICULARLY ACROSS THE OFFSHORE ATLANTIC WATERS,
RIP CURRENTS
LIFE-THREATENING RIP CURRENTS ARE POSSIBLE IN THE
SURF ZONE, PARTICULARLY ACROSS ST CROIX. ISOLATED STRONGER RIP
CURRENTS MAY OCCUR ELSEWHERE, ESPECIALLY NEAR PIERS, JETTIES, AND
CHANNELS.
DAYS TWO THROUGH SEVEN
WEDNESDAY THROUGH MONDAY
A TROPICAL WAVE INTERACTING WITH AN UPPER-LEVEL TROUGH WILL BRING
MORE SHOWERS AND THUNDERSTORMS WEDNESDAY AND THURSDAY, INCREASING
THE RISK OF FLOODING. STRONGER WINDS ON WEDNESDAY WILL ALSO KEEP
SEAS CHOPPY ACROSS THE OFFSHORE ATLANTIC WATERS. MODERATE RIP
CURRENT RISK WILL HOLD THROUGH THE WEEKEND, WHILE HEAT CONCERNS
CONTINUE, WITH THE MOST DANGEROUS CONDITIONS EXPECTED FRIDAY INTO
THE WEEKEND WHEN RAINFALL IS LESS FREQUENT.
SPOTTER INFORMATION STATEMENT
SPOTTER ACTIVATION IS ENCOURAGED. PLEASE RELAY ANY INFORMATION
ABOUT FLOODING, WINDS, WAVES, AND RIP CURRENTS TO THE NATIONAL
WEATHER SERVICE IN SAN JUAN.
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