FZUS61 KBUF 281410 GLFSL Forecast for the Saint Lawrence River including the Thousand Islands Region National Weather Service Buffalo NY 1010 AM EDT Sat Mar 28 2026 SLZ022-024-282100- Saint Lawrence River from Cape Vincent to Saint Regis 1010 AM EDT Sat Mar 28 2026 .THIS AFTERNOON...Southwest winds 5 to 15 knots becoming west. A chance of flurries. .TONIGHT...West winds 5 to 15 knots becoming southwest. A chance of snow showers after midnight. .SUNDAY...Southwest winds 5 to 15 knots. A chance of snow showers in the morning. .SUNDAY NIGHT...Southwest winds 5 to 10 knots. Mostly cloudy. .MONDAY...Southwest winds 5 to 10 knots becoming east. A chance of rain showers Monday night. .TUESDAY...East winds 10 to 15 knots becoming southwest. Rain showers. .WEDNESDAY...West winds 5 to 10 knots becoming north. Rain showers during the day. $$