Great Lakes Forecast
Issued by NWS
Issued by NWS
980 FZUS61 KBUF 300302 GLFSL Forecast for the Saint Lawrence River including the Thousand Islands Region National Weather Service Buffalo NY 1002 PM EST Sat Nov 29 2025 SLZ022-301000- Saint Lawrence River from Cape Vincent to Ogdensburg- 1002 PM EST Sat Nov 29 2025 .OVERNIGHT...Southeast winds 10 knots or less increasing to 10 to 15 knots. A chance of snow. Snow late. .SUNDAY...Southeast winds 15 to 20 knots becoming south. Snow in the morning, then snow and rain in the afternoon. .SUNDAY NIGHT...Southwest winds 15 to 25 knots becoming northwest. Rain and snow showers. .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...South winds 10 knots or less becoming northwest. Snow showers likely during the day. .WEDNESDAY...Southwest winds 5 to 15 knots becoming west. A chance of snow showers during the day, then snow showers Wednesday night. .THURSDAY...West winds 5 to 15 knots becoming south. Snow showers during the day, then a chance of snow showers Thursday night. $$ SLZ024-301000- Saint Lawrence River from Ogdensburg to Saint Regis- 1002 PM EST Sat Nov 29 2025 .OVERNIGHT...East winds 10 knots or less becoming southeast. Snow likely late. .SUNDAY...Southeast winds 5 to 15 knots becoming south 15 to 20 knots. Snow through early afternoon, then rain and snow likely late. .SUNDAY NIGHT...Southwest winds 15 to 25 knots becoming northwest. Rain and snow showers in the evening, then snow showers overnight. .MONDAY...Northwest winds 15 to 20 knots becoming west and diminishing to less than 10 knots in the afternoon. A chance of snow showers in the morning. .MONDAY NIGHT...Light and variable winds. A chance of snow showers overnight. .TUESDAY...South winds 5 to 10 knots becoming light and variable. Snow showers likely during the day. .WEDNESDAY...Southwest winds 5 to 15 knots becoming west. Snow showers Wednesday night. .THURSDAY...West winds 5 to 15 knots becoming southwest. Snow showers during the day. $$