FZUS61 KBUF 052010 GLFSL Forecast for the Saint Lawrence River including the Thousand Islands Region National Weather Service Buffalo NY 410 PM EDT Sun Apr 5 2026 SLZ022-024-060300- Saint Lawrence River from Cape Vincent to Saint Regis 410 PM EDT Sun Apr 5 2026 ...SMALL CRAFT ADVISORY IN EFFECT UNTIL 10 PM EDT THIS EVENING... .TONIGHT...West winds 15 to 20 knots diminishing to 10 to 15 knots. A chance of rain showers early. A chance of snow showers after midnight. .MONDAY...West winds 5 to 15 knots. A chance of snow showers late. .MONDAY NIGHT...Northwest winds 10 knots or less becoming north 10 to 15 knots. A chance of snow showers in the evening, then snow showers likely overnight. .TUESDAY...North winds 5 to 15 knots becoming northwest. Snow showers likely in the morning. .TUESDAY NIGHT...West winds 10 knots or less becoming southwest. Mainly clear. .WEDNESDAY...Southwest winds 5 to 15 knots becoming south. Mainly clear, then becoming partly cloudy. .THURSDAY...South winds 10 to 15 knots becoming southwest. A chance of rain showers Thursday night. .FRIDAY...Southwest winds 10 knots or less becoming northwest. A chance of rain showers. $$