Hazardous Weather Outlook
Issued by NWS San Juan, PR
Issued by NWS San Juan, PR
888 FLCA42 TJSJ 230801 HWOSJU Hazardous Weather Outlook National Weather Service San Juan PR 401 AM AST Sat Aug 23 2025 AMZ711>745-PRZ001>013-241000- 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- 401 AM AST Sat Aug 23 2025 This Hazardous Weather Outlook is for portions of Puerto Rico. .DAY ONE...Today and Tonight .Lightning...Isolated thunderstorms, particularly over southern Puerto Rico, Vieques, and Culebra this morning, spreading to central and northern Puerto Rico in the afternoon. Stay alert and be prepared to take shelter if storms develop. .Excessive Rainfall...Flooding in urban areas, roads, small streams, and washes, particularly across central and northern 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 coastal and urban areas. .Marine Conditions...Hazardous conditions for small craft in areas with seas of 7 feet or higher, particularly across the offshore Atlantic waters and coastal waters of northern Puerto Rico. Small craft should exercise caution elsewhere across the local waters. .Rip Currents...Life-threatening rip currents are likely in the surf zone, particularly across northern Puerto Rico and Culebra. Isolated stronger rip currents may occur elsewhere, especially near piers, jetties, and channels. .DAYS TWO THROUGH SEVEN...Sunday through Friday The risk of excessive rainfall will diminish with each passing day, while the risk of excessive heat will persist through the workweek. Swells from former Hurricane Erin will maintain hazardous marine conditions and a high risk of life-threatening rip currents through midweek, which will be exacerbated by breezy winds, particularly on Sunday and Monday. Additionally, a plume of the Saharan Air Layer (SAL) will move in from Sunday through Tuesday, resulting in hazy skies, reduced visibility, and deteriorating air quality. The combination of these breezy winds and drier conditions may lead to an elevated risk of fire weather early next week. .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. $$ AMZ716-726-VIZ001-002-241000- St. Thomas St. John adjacent Islands-St Croix- Nearshore Atlantic and adjacent Caribbean Coastal Waters- 401 AM AST Sat Aug 23 2025 This Hazardous Weather Outlook is for portions of USVI. .DAY ONE...Today and Tonight .Lightning...Isolated thunderstorms throughout the day. Stay alert and be prepared to take shelter if storms develop. .Excessive Rainfall...Ponding of water in roads and poorly drained areas. There is a low chance of localized urban and small streams flooding. .Excessive Heat...This level of heat affects primarily those individuals extremely sensitive to heat, especially when outdoors without effective cooling and/or adequate hydration. .Marine Conditions...Small craft should exercise caution. .Rip Currents...Life-threatening rip currents are likely in the surf zone, particularly across St Thomas and St John. Isolated stronger rip currents may occur elsewhere, especially near piers, jetties, and channels. .DAYS TWO THROUGH SEVEN...Sunday through Friday The risk of excessive heat will persist through the workweek. Swells from former Hurricane Erin will maintain hazardous marine conditions and a high risk of life-threatening rip currents through midweek, which will be exacerbated by breezy winds, particularly on Sunday and Monday. Additionally, a plume of the Saharan Air Layer (SAL) will move in from Sunday through Tuesday, resulting in hazy skies, reduced visibility, and deteriorating air quality. .SPOTTER INFORMATION STATEMENT... Spotter activation is encouraged. Please relay any information about flooding, winds, waves, and rip currents to the National Weather Service in San Juan. $$