


Great Lakes Forecast
Issued by NWS
Issued by NWS
367 FZUS61 KBUF 200801 GLFSL Forecast for the Saint Lawrence River including the Thousand Islands Region National Weather Service Buffalo NY 401 AM EDT Sun Apr 20 2025 SLZ022-201500- Saint Lawrence River from Cape Vincent to Ogdensburg- 401 AM EDT Sun Apr 20 2025 .TODAY...Northwest winds 5 to 10 knots. Sunny. .TONIGHT...Northwest winds 10 knots or less becoming east. Mainly clear early, then becoming partly cloudy. .MONDAY...East winds 10 knots or less becoming southeast. A chance of rain showers in the morning, then rain showers likely in the afternoon. .MONDAY NIGHT...Southeast winds 10 to 15 knots becoming southwest. Showers. .TUESDAY...Southwest winds 15 to 20 knots becoming west 5 to 15 knots. Mostly cloudy. .WEDNESDAY...West winds less than 10 knots becoming south. Partly cloudy. .THURSDAY...South winds 10 knots or less becoming southeast. Partly to mostly cloudy. $$ SLZ024-201500- Saint Lawrence River from Ogdensburg to Saint Regis- 401 AM EDT Sun Apr 20 2025 .TODAY...Northwest winds 10 to 15 knots. Sunny. .TONIGHT...Northwest winds 5 to 10 knots becoming light and variable. Mainly clear early, then becoming partly cloudy. .MONDAY...East winds 10 knots or less. Rain showers likely in the afternoon. .MONDAY NIGHT...East winds 5 to 15 knots becoming south. Showers. .TUESDAY...Southwest winds 5 to 15 knots becoming west. Mostly cloudy. .WEDNESDAY...West winds 5 to 10 knots becoming light and variable. Partly to mostly cloudy. .THURSDAY...Southwest winds 10 knots or less becoming southeast. A chance of rain showers Thursday night. $$