FZUS61 KBUF 281403 GLFSL Forecast for the Saint Lawrence River including the Thousand Islands Region National Weather Service Buffalo NY 1003 AM EDT Tue Apr 28 2026 SLZ022-024-282100- Saint Lawrence River from Cape Vincent to Saint Regis 1003 AM EDT Tue Apr 28 2026 .THIS AFTERNOON...South winds 15 to 20 knots diminishing to 10 to 15 knots. A chance of showers early. Showers likely late. .TONIGHT...South winds 5 to 15 knots becoming southwest. A chance of showers. .WEDNESDAY...Southwest winds less than 10 knots becoming east. A chance of showers in the morning, then showers in the afternoon. .WEDNESDAY NIGHT...Northeast winds 10 knots or less becoming southwest. Showers. .THURSDAY...West winds 5 to 10 knots. Rain showers during the day, then a chance of rain showers Thursday night. .FRIDAY...West winds 5 to 10 knots. A chance of rain showers. .SATURDAY...West winds 10 knots or less becoming southwest. A chance of rain showers. $$