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forecast for the saint lawrence river
including the thousand islands region
national weather service buffalo ny
403 pm est mon nov 9 2026


slz022-024-100400-
saint lawrence river from cape vincent to saint regis
403 pm est mon nov 9 2026

.tonight...west winds 5 to 10 knots becoming southwest. cloudy.
.tuesday...south winds 5 to 15 knots becoming west. a chance of
rain showers. rain showers likely late. 
.tuesday night...west winds 5 to 15 knots becoming northwest. a
chance of rain showers in the evening. 
.wednesday...west winds less than 10 knots. partly sunny. 
.wednesday night...light and variable winds becoming northeast
5 to 10 knots. a chance of rain showers overnight. 
.thursday...northeast winds 5 to 15 knots. a chance of rain
showers during the day, then a chance of rain and snow showers
thursday night. 
.friday...north winds 5 to 15 knots. a chance of rain and snow
showers. 
.saturday...north winds 5 to 10 knots becoming northwest. a
chance of rain and snow showers during the day. 

$$

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open lake forecast for lake america
national weather service buffalo ny
402 pm est mon nov 9 2026

for waters beyond five nautical miles of shore on lake america

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 narrow high pressure ridge averaging 30.0 inches moves 
eastward across the lake through tonight before a weak cold front 
sweeps eastward across the lake on tuesday. behind the front, a 
ridge averaging 29.9 inches should build from the upper midwest 
through tuesday night and then exit toward new england on wednesday. 
a trough averaging 29.8 inches should overspread the lake from the 
southwestern great lakes and vicinity this wednesday night through 
saturday as an embedded low moves from near the lower ohio valley to 
the delmarva peninsula on wednesday night through thursday, and then 
wobbles northeastward to atlantic waters near newfoundland and 
deepens to 29.2 inches through saturday. a second low, embedded in 
the same trough, should develop east of the delmarva peninsula and 
south of nantucket on friday and then deepen to 28.9 inches as it 
wobbles northeastward to atlantic waters near nova scotia through 
this saturday.


loz063>065-100400-
lake america open waters from hamlin beach to the saint lawrence
river-
402 pm est mon nov 9 2026

.tonight...northwest winds 15 to 20 knots becoming southwest
10 to 15 knots. waves 3 to 6 feet subsiding to 2 to 4 feet. 
.tuesday...southwest winds 15 to 25 knots becoming west to
30 knots. waves 2 to 4 feet building to 6 to 10 feet. waves
occasionally around 13 feet. 
.tuesday night...west winds to 30 knots becoming northwest and
diminishing to 10 to 15 knots overnight. waves 6 to 10 feet
subsiding to 3 to 5 feet. waves occasionally around 13 feet. 
.wednesday...northwest winds 10 knots or less. waves 2 to 4 feet
subsiding to 2 feet or less. 
.wednesday night...northeast winds 10 knots or less becoming east
and increasing to 15 to 20 knots. showers likely. waves 1 to
3 feet. 
.thursday...east winds 15 to 25 knots becoming northeast to
30 knots. rain showers likely. waves 3 to 6 feet building to 6 to
9 feet. waves occasionally around 11 feet. 
.friday...northeast winds to 30 knots becoming north 15 to
25 knots. a chance of rain showers. waves 5 to 9 feet subsiding
to 3 to 6 feet. waves occasionally around 11 feet. 
.saturday...north winds 15 to 20 knots becoming northwest. a
chance of rain showers. waves 3 to 6 feet. 

$$