FZUS61 KBUF 071431 GLFSL Forecast for the Saint Lawrence River including the Thousand Islands Region National Weather Service Buffalo NY 1031 AM EDT Mon Apr 7 2025 SLZ022-024-072100- Saint Lawrence River from Cape Vincent to Saint Regis 1031 AM EDT Mon Apr 7 2025 .REST OF TODAY...South winds 10 knots or less. Mostly sunny late this morning, then becoming mostly cloudy. .TONIGHT...South winds 10 knots or less becoming southwest and increasing to 15 to 20 knots after midnight. A chance of rain showers early, then snow showers with rain showers likely late in the evening. Snow showers after midnight. .TUESDAY...Southwest winds 15 to 20 knots becoming northwest. Snow showers. .TUESDAY NIGHT...Northwest winds 5 to 15 knots becoming west. Mostly cloudy. .WEDNESDAY...West winds 5 to 15 knots becoming southwest. Partly cloudy. .THURSDAY...South winds 5 to 10 knots becoming east. A chance of rain and snow showers during the day, then rain showers likely Thursday night. .FRIDAY...Northeast winds 5 to 10 knots. A chance of rain showers. $$