Hazardous Weather Outlook
Issued by NWS San Juan, PR
Issued by NWS San Juan, PR
641 FLCA42 TJSJ 050813 HWOSJU Hazardous Weather Outlook National Weather Service San Juan PR 413 AM AST Fri Sep 5 2025 AMZ711>745-PRZ001>013-060815- 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- 413 AM AST Fri Sep 5 2025 This Hazardous Weather Outlook is for portions of Puerto Rico. .DAY ONE...Today and Tonight .Lightning...Isolated thunderstorms expected across the islands due to the passage of a tropical wave. 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 eastern 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 most coastal municipalities before the onset of afternoon showers. .DAYS TWO THROUGH SEVEN...Saturday through Thursday The excessive heat threat will continue through the workweek across most coastal and urban areas of the lower elevations of the islands. Lingering moisture from the departing tropical wave and an upper level trough will trigger the development of showers and isolated thunderstorms during the weekend. Through the workweek, thunderstorms are expected to develop each afternoon over portions of the interior and western Puerto Rico, which can produce urban and small stream flooding, lightning strikes, and strong gusty winds. A moderate risk of rip currents will return during the first part of the week. .SPOTTER INFORMATION STATEMENT... Spotter activation is encouraged. Please relay any information about flooding to the National Weather Service in San Juan. $$ AMZ716-726-VIZ001-002-060815- St. Thomas St. John adjacent Islands-St Croix- Nearshore Atlantic and adjacent Caribbean Coastal Waters- 413 AM AST Fri Sep 5 2025 This Hazardous Weather Outlook is for portions of USVI. .DAY ONE...Today and Tonight .Lightning...Isolated thunderstorms expected across the islands due to the passage of a tropical wave. Stay alert and be prepared to take shelter if storms develop. .Excessive Rainfall...Ponding of water in roads and poorly drained areas, particularly across all the islands. There is a low chance of localized urban flooding. .Excessive Heat...This level of heat affects most individuals sensitive to heat, especially those without effective cooling and/or adequate hydration. Those extremely sensitive to heat face the highest risk. Some health systems and heat-sensitive industries could be affected. These conditions are most likely across all urban and lower elevations of the islands. .DAYS TWO THROUGH SEVEN...Saturday through Thursday The excessive heat threat will continue through the workweek across most coastal and urban areas of the lower elevations of the islands. Lingering moisture from the departing tropical wave and an upper level trough will trigger the development of showers and isolated thunderstorms during the weekend. A moderate risk of rip currents will return on Monday across most east and north facing beaches of St. Croix. .SPOTTER INFORMATION STATEMENT... Spotter activation is encouraged. Please relay any information about flooding to the National Weather Service in San Juan. $$