FZUS61 KBUF 030802 GLFSL Forecast for the Saint Lawrence River including the Thousand Islands Region National Weather Service Buffalo NY 402 AM EDT Thu Jul 3 2025 SLZ022-024-031500- Saint Lawrence River from Cape Vincent to Saint Regis 402 AM EDT Thu Jul 3 2025 .TODAY...Southwest winds 10 knots or less becoming west. A chance of showers and thunderstorms this morning, then showers likely with a chance of thunderstorms this afternoon. .TONIGHT...Northwest winds less than 10 knots. A chance of showers and thunderstorms early. .FRIDAY...Northwest winds less than 10 knots becoming west. Sunny. .FRIDAY NIGHT...West winds less than 10 knots becoming south. Mainly clear in the evening, then becoming partly cloudy. .SATURDAY...Southwest winds 5 to 10 knots. Partly cloudy. .SUNDAY...Southwest winds 5 to 10 knots becoming west. A chance of showers during the day, then a chance of showers and thunderstorms Sunday night. .MONDAY...Northwest winds 10 knots or less becoming north. A chance of showers and thunderstorms. Winds and waves higher in and near thunderstorms. $$