Hazardous Weather Outlook
Issued by NWS San Juan, PR
Issued by NWS San Juan, PR
952 FLCA42 TJSJ 090928 HWOSJU Hazardous Weather Outlook National Weather Service San Juan PR 528 AM AST Sat Aug 9 2025 AMZ711>745-PRZ001>013-100930- 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- 528 AM AST Sat Aug 9 2025 This Hazardous Weather Outlook is for portions of Puerto Rico. .DAY ONE...Today and Tonight .Lightning...Isolated thunderstorms, particularly across interior to western PR and downwind of El Yunque and the local islands. Stay alert and be prepared to take shelter if storms develop. .Excessive Rainfall...Flooding in urban areas, roads, small streams, and washes, particularly across interior to western PR, as well as possibly downwind of El Yunque and the local islands. 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 urban and coastal areas of PR. .DAYS TWO THROUGH SEVEN...Sunday through Friday Excessive heat and excessive rainfall concerns are expected to persist throughout the forecast period. However, excessive rainfall hazard risks will likely increase early next week, as trailing moisture from Invest 96L heighten the potential for showers and thunderstorms, thereby raising the risk of flooding. A moderate risk of rip currents will return by Sunday, while limited wind-related risk will return early next week. .SPOTTER INFORMATION STATEMENT... Spotter activation will not be needed. $$ AMZ716-726-VIZ001-002-100930- St. Thomas St. John adjacent Islands-St Croix- Nearshore Atlantic and adjacent Caribbean Coastal Waters- 528 AM AST Sat Aug 9 2025 This Hazardous Weather Outlook is for portions of USVI. .DAY ONE...Today and Tonight .Lightning...Isolated thunderstorms possible as an induced surface trough moves through. Stay alert and be prepared to take shelter if storms develop. .Excessive Rainfall...Ponding of water in roads and poorly drained areas. There is a low chance of localized urban and small streams flooding. .Excessive Heat...This level of heat affects primarily those individuals extremely sensitive to heat, especially when outdoors without effective cooling and/or adequate hydration. .DAYS TWO THROUGH SEVEN...Sunday through Friday Excessive heat concerns are expected to persist throughout the forecast period. However, excessive rainfall hazard risks will likely increase early next week, as trailing moisture from Invest 96L heighten the potential for showers and thunderstorms, thereby raising the risk of flooding. A moderate risk of rip currents will return by Monday. .SPOTTER INFORMATION STATEMENT... Spotter activation will not be needed. $$