Hazardous Weather Outlook
Issued by NWS San Juan, PR
Issued by NWS San Juan, PR
193 FLCA42 TJSJ 010823 HWOSJU Hazardous Weather Outlook National Weather Service San Juan PR 423 AM AST Mon Sep 1 2025 AMZ711>745-PRZ001>013-020830- 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- 423 AM AST Mon Sep 1 2025 This Hazardous Weather Outlook is for portions of Puerto Rico. .DAY ONE...Today and Tonight .Lightning...Isolated thunderstorms, particularly across the interior and western sections of Puerto Rico. Stay alert and be prepared to take shelter if storms develop. .Excessive Rainfall...Flooding in urban areas, roads, small streams, and washes, particularly across the interior and western Puerto Rico. There is a low chance of isolated flash floods. Elsewhere, plan for water ponding on roads and in poorly drained areas. .Excessive Heat...This level of heat affects most individuals sensitive to heat, especially those without effective cooling and/or adequate hydration. Those extremely sensitive to heat face the highest risk. Some health systems and heat-sensitive industries could be affected. These conditions are most likely across all low, urban and coastal areas of Puerto Rico. .DAYS TWO THROUGH SEVEN...Tuesday through Sunday The excessive heat threat will continue through the workweek across most coastal and urban areas of the lower elevations of the islands. Thunderstorms are expected each afternoon over portions of the interior and western Puerto Rico, which may lead to urban and small stream flooding, lightning strikes, and strong gusty winds. A tropical wave is expected to move across the local area during the weekend, increasing shower and thunderstorm activity in general. .SPOTTER INFORMATION STATEMENT... Spotter activation is encouraged. Please relay any information about flooding to the National Weather Service in San Juan. $$ AMZ716-726-VIZ001-002-020830- St. Thomas St. John adjacent Islands-St Croix- Nearshore Atlantic and adjacent Caribbean Coastal Waters- 423 AM AST Mon Sep 1 2025 This Hazardous Weather Outlook is for portions of USVI. .DAY ONE...Today and Tonight .Excessive Heat...This level of heat affects most individuals sensitive to heat, especially those without effective cooling and/or adequate hydration. Those extremely sensitive to heat face the highest risk. Some health systems and heat-sensitive industries could be affected. These conditions are most likely across the urban and coastal areas of Saint Thomas, Saint John, and Saint Croix. .DAYS TWO THROUGH SEVEN...Tuesday through Sunday The excessive heat threat will continue through the workweek across most coastal and urban areas of the lower elevations of the islands. A tropical wave is expected to move across the local area during the weekend, increasing shower and thunderstorm activity in general. .SPOTTER INFORMATION STATEMENT... Spotter activation will not be needed. $$