Hazardous Weather Outlook
Issued by NWS San Juan, PR
Issued by NWS San Juan, PR
206 FLCA42 TJSJ 200809 HWOSJU Hazardous Weather Outlook National Weather Service San Juan PR 409 AM AST Wed Aug 20 2025 AMZ711>745-PRZ001>013-210815- 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- 409 AM AST Wed Aug 20 2025 This Hazardous Weather Outlook is for portions of Puerto Rico. .DAY ONE...Today and Tonight .Lightning...Isolated thunderstorms, particularly across northwestern Puerto Rico. Stay alert and be prepared to take shelter if storms develop. .Excessive Heat...This level of heat affects anyone without effective cooling and/or adequate hydration, with those sensitive to heat at the highest risk. Impacts likely in some health systems, heat-sensitive industries and infrastructures. These conditions are most likely across all coastal areas of Puerto Rico, including the municipalities of the eastern interior. .Rip Currents...Life-threatening rip currents are possible in the surf zone, particularly across northern and eastern Puerto Rico, and Culebra. Isolated stronger rip currents may occur elsewhere, especially near piers, jetties, and channels. .DAYS TWO THROUGH SEVEN...Thursday through Tuesday Hot conditions will continue due to southeasterly winds and high humidity through the end of the week, promoting high temperatures and high heat indices in the region. Marine conditions will deteriorate by the end of the week as a northerly swell arrives. Beaches will be hazardous along the northern and western coast of Puerto Rico, as well as for St. Thomas and St. John. .SPOTTER INFORMATION STATEMENT... Spotter activation will not be needed. $$ AMZ716-726-VIZ001-002-210815- St. Thomas St. John adjacent Islands-St Croix- Nearshore Atlantic and adjacent Caribbean Coastal Waters- 409 AM AST Wed Aug 20 2025 This Hazardous Weather Outlook is for portions of USVI. .DAY ONE...Today and Tonight .Excessive Heat...This level of heat affects most individuals sensitive to heat, especially those without effective cooling and/or adequate hydration. Those extremely sensitive to heat face the highest risk. Some health systems and heat-sensitive industries could be affected. These conditions are most likely across all local islands. .Rip Currents...Life-threatening rip currents are possible in the surf zone, particularly across all local islands. Isolated stronger rip currents may occur elsewhere, especially near piers, jetties, and channels. .DAYS TWO THROUGH SEVEN...Thursday through Tuesday Hot conditions will continue due to southeasterly winds and high humidity through the end of the week, promoting high temperatures and high heat indices in the region. Marine conditions will deteriorate by the end of the week as a northerly swell arrives. Beaches will be hazardous along the northern and western coast of Puerto Rico, as well as for St. Thomas and St. John. .SPOTTER INFORMATION STATEMENT... Spotter activation will not be needed. $$