Great Lakes Forecast
Issued by NWS
Issued by NWS
584 FZUS61 KBUF 300902 GLFSL Forecast for the Saint Lawrence River including the Thousand Islands Region National Weather Service Buffalo NY 402 AM EST Sun Nov 30 2025 SLZ022-301600- Saint Lawrence River from Cape Vincent to Ogdensburg- 402 AM EST Sun Nov 30 2025 .TODAY...Southeast winds 15 to 20 knots becoming south. Snow likely early, then snow showers. Rain and snow showers late. .TONIGHT...Southwest winds 15 to 25 knots becoming northwest. Rain and snow showers through the early overnight, then a chance of snow showers late. .MONDAY...Northwest winds 5 to 15 knots becoming southwest less than 10 knots. A chance of snow showers in the morning. .MONDAY NIGHT...Light and variable winds becoming south 5 to 10 knots. A chance of snow showers overnight. .TUESDAY...Southeast winds 10 knots or less becoming west. Snow showers during the day. .WEDNESDAY...Southwest winds 5 to 10 knots increasing to 15 to 20 knots. A chance of snow showers during the day, then snow showers Wednesday night. .THURSDAY...West winds 15 to 20 knots diminishing to 5 to 15 knots. Snow showers during the day, then a chance of snow showers Thursday night. $$ SLZ024-301600- Saint Lawrence River from Ogdensburg to Saint Regis- 402 AM EST Sun Nov 30 2025 .TODAY...Southeast winds 5 to 15 knots becoming south 15 to 20 knots. Snow showers through early afternoon, then rain and snow showers likely late. .TONIGHT...Southwest winds 15 to 25 knots becoming northwest. Rain and snow showers in the evening, then snow showers after midnight. A chance of snow showers late. .MONDAY...Northwest winds 15 to 20 knots becoming west and diminishing to less than 10 knots in the afternoon. A chance of snow showers in the morning. .MONDAY NIGHT...Light and variable winds. A chance of snow showers overnight. .TUESDAY...Southeast winds 10 knots or less becoming southwest. Snow showers likely during the day. .WEDNESDAY...Southwest winds 5 to 15 knots increasing to 15 to 20 knots. A chance of snow showers during the day, then snow showers Wednesday night. .THURSDAY...West winds 15 to 20 knots diminishing to 5 to 10 knots. Snow showers during the day. $$