Great Lakes Forecast
Issued by NWS
Issued by NWS
874 FZUS61 KBUF 250302 GLFSL Forecast for the Saint Lawrence River including the Thousand Islands Region National Weather Service Buffalo NY 1002 PM EST Mon Nov 24 2025 SLZ022-251000- Saint Lawrence River from Cape Vincent to Ogdensburg- 1002 PM EST Mon Nov 24 2025 .OVERNIGHT...South winds 5 to 10 knots. Cloudy. .TUESDAY...South winds 5 to 10 knots. A chance of rain late. .TUESDAY NIGHT...Southeast winds less than 10 knots. Rain. .WEDNESDAY...Southeast winds 10 knots or less becoming southwest and increasing to 15 to 20 knots in the afternoon. Showers. .WEDNESDAY NIGHT...Southwest winds 15 to 25 knots. Lake effect rain showers in the evening, then lake effect rain and snow showers likely overnight. .THURSDAY...Southwest winds to 30 knots becoming west and diminishing to 15 to 20 knots. Lake effect rain and snow showers likely during the day, then lake effect snow showers likely Thursday night. .FRIDAY...West winds 15 to 20 knots diminishing to 5 to 10 knots. A chance of snow showers during the day. .SATURDAY...West winds 10 knots or less becoming south. A chance of snow showers Saturday night. $$ SLZ024-251000- Saint Lawrence River from Ogdensburg to Saint Regis- 1002 PM EST Mon Nov 24 2025 .OVERNIGHT...South winds 5 to 10 knots becoming southwest. Cloudy. .TUESDAY...Southwest winds 10 knots or less becoming southeast. Mostly cloudy. .TUESDAY NIGHT...Light and variable winds. Rain. .WEDNESDAY...East winds 10 knots or less becoming south and increasing to 15 to 20 knots in the afternoon. Rain showers. .WEDNESDAY NIGHT...Southwest winds 15 to 25 knots increasing to 30 knots. Lake effect rain showers in the evening, then rain showers likely with a chance of snow showers overnight. .THURSDAY...Southwest winds to 30 knots becoming west 15 to 25 knots. Lake effect rain and snow showers likely during the day, then lake effect snow showers likely Thursday night. .FRIDAY...West winds 15 to 20 knots diminishing to 10 to 15 knots. Snow showers likely during the day. .SATURDAY...West winds 10 knots or less becoming south. A chance of snow showers Saturday night. $$