


Great Lakes Forecast
Issued by NWS
Issued by NWS
337 FZUS61 KBUF 200202 GLFSL Forecast for the Saint Lawrence River including the Thousand Islands Region National Weather Service Buffalo NY 1002 PM EDT Sat Jul 19 2025 SLZ022-024-200900- Saint Lawrence River from Cape Vincent to Saint Regis 1002 PM EDT Sat Jul 19 2025 .REST OF TONIGHT...Light and variable winds. A chance of showers and thunderstorms late this evening, then showers with a chance of thunderstorms after midnight. .SUNDAY...Southeast winds 10 knots or less becoming northwest. Showers with a chance of thunderstorms early, then a chance of showers late in the morning. .SUNDAY NIGHT...Northwest winds 10 knots or less becoming north. Partly cloudy. .MONDAY...North winds 5 to 10 knots. Sunny. .MONDAY NIGHT...North winds 5 to 10 knots becoming light and variable. Mainly clear. .TUESDAY...Light and variable winds. Mainly clear. .WEDNESDAY...South winds 10 knots or less. A chance of showers Wednesday night. .THURSDAY...Southwest winds 5 to 15 knots. Showers likely with a chance of thunderstorms. Winds and waves higher in and near thunderstorms. $$