FZUS61 KBUF 051403 GLFSL Forecast for the Saint Lawrence River including the Thousand Islands Region National Weather Service Buffalo NY 1003 AM EDT Tue May 5 2026 SLZ022-024-052100- Saint Lawrence River from Cape Vincent to Saint Regis 1003 AM EDT Tue May 5 2026 .REST OF TODAY...Southwest winds 15 to 20 knots. Showers late this morning, then showers with a chance of thunderstorms early this afternoon. A chance of showers and thunderstorms late. .TONIGHT...West winds 15 to 20 knots becoming southwest and diminishing to 10 knots or less after midnight. Showers in the evening, then showers likely after midnight. .WEDNESDAY...Southwest winds less than 10 knots becoming west. Showers likely. .WEDNESDAY NIGHT...Southwest winds less than 10 knots. A chance of rain showers in the evening. .THURSDAY...Southwest winds 10 knots or less becoming west. Partly to mostly cloudy. .FRIDAY...West winds 10 knots or less becoming southwest. A chance of rain showers. .SATURDAY...South winds 5 to 10 knots becoming southwest. Showers likely. Winds and waves higher in and near thunderstorms. $$