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forecast for the saint lawrence river
including the thousand islands region
national weather service buffalo ny
1002 am edt tue sep 8 2026


slz022-024-082100-
saint lawrence river from cape vincent to saint regis
1002 am edt tue sep 8 2026

.this afternoon...light and variable winds. mostly cloudy. 
.tonight...light and variable winds becoming southeast 5 to
10 knots. mostly cloudy. 
.wednesday...south winds 5 to 15 knots. a chance of showers in
the morning, then showers in the afternoon. 
.wednesday night...southwest winds 15 to 20 knots diminishing to
10 to 15 knots. showers.
.thursday...west winds 5 to 15 knots becoming northwest. partly
cloudy. 
.friday...northwest winds less than 10 knots becoming south.
mainly clear. 
.saturday...south winds 5 to 15 knots becoming southwest. mainly
clear, then becoming partly cloudy. 

$$

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open lake forecast for lake ontario
national weather service buffalo ny
1002 am edt tue sep 8 2026

for waters beyond five nautical miles of shore on lake ontario

waves are the significant wave height - the average of the highest
1/3 of the wave spectrum. occasional wave height is the average of
the highest 1/10 of the wave spectrum.

.synopsis...a 30.2 inch high extending over the region will drift to 
the eastern seaboard today. meanwhile, a 29.3 inch low over far 
northwest ontario province will move to hudson bay by late 
wednesday, then to northern quebec by thursday while deepening to 
29.0 inches. a trailing cold front will cross the lower great lakes 
wednesday night, followed by a 30.0 inch high building east across 
the eastern great lakes region thursday through friday, before 
sliding east into new england by saturday.


loz063>065-082100-
lake ontario open waters from hamlin beach to the saint lawrence
river-
1002 am edt tue sep 8 2026

.this afternoon...west winds less than 10 knots becoming
southwest. waves 1 foot or less. 
.tonight...southeast winds 10 knots or less becoming south 10 to
15 knots. waves 2 feet or less. 
.wednesday...south winds 15 to 20 knots becoming southwest. a
chance of showers in the morning, then showers with a chance of
thunderstorms in the afternoon. waves 1 to 3 feet. 
.wednesday night...southwest winds 15 to 25 knots becoming west.
showers with a chance of thunderstorms in the evening, then
showers overnight. waves 3 to 6 feet. 
.thursday...west winds 15 to 20 knots becoming north. waves 3 to
6 feet. 
.friday...north winds 10 knots or less becoming south. waves 1 to
3 feet subsiding to 1 foot or less. 
.saturday...south winds 10 to 15 knots becoming southwest 15 to
20 knots. waves 1 to 3 feet. 

winds and waves higher in and near thunderstorms.

$$