FZUS61 KBUF 120902 GLFSL Forecast for the Saint Lawrence River including the Thousand Islands Region National Weather Service Buffalo NY 402 AM EST Fri Dec 12 2025 SLZ022-121600- Saint Lawrence River from Cape Vincent to Ogdensburg- 402 AM EST Fri Dec 12 2025 .TODAY...West winds 15 to 20 knots diminishing to 10 to 15 knots. Mostly cloudy through early afternoon, then becoming partly sunny. .TONIGHT...West winds 10 knots or less becoming south. A chance of snow showers late in the evening. Lake effect snow showers likely after midnight. .SATURDAY...South winds 10 to 15 knots becoming southwest. Lake effect snow. .SATURDAY NIGHT...West winds 5 to 15 knots diminishing to less than 10 knots. Lake effect snow showers likely in the evening, then a chance of snow showers overnight. .SUNDAY...Northwest winds 5 to 10 knots. A chance of snow showers during the day. .MONDAY...West winds 10 knots or less becoming southwest. A chance of snow showers during the day, then snow showers likely Monday night. .TUESDAY...Southwest winds 10 knots or less becoming south 10 to 15 knots. A chance of snow showers during the day. $$ SLZ024-121600- Saint Lawrence River from Ogdensburg to Saint Regis- 402 AM EST Fri Dec 12 2025 .TODAY...Southwest winds 5 to 15 knots becoming west. Mostly cloudy through early afternoon, then becoming partly sunny. .TONIGHT...West winds 10 knots or less becoming south. A chance of snow showers late. .SATURDAY...South winds 5 to 15 knots becoming southwest. Lake effect snow in the morning, then lake effect snow showers likely in the afternoon. .SATURDAY NIGHT...Southwest winds 5 to 15 knots diminishing to less than 10 knots. Lake effect snow showers likely in the evening. .SUNDAY...West winds 5 to 10 knots. Mostly cloudy. .MONDAY...West winds 5 to 10 knots becoming southwest. A chance of snow showers during the day, then snow showers likely Monday night. .TUESDAY...Southwest winds 5 to 15 knots becoming south 15 to 20 knots. A chance of snow showers Tuesday night. $$