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forecast for the saint lawrence river
including the thousand islands region
national weather service buffalo ny
1003 pm edt mon may 11 2026


slz022-024-120900-
saint lawrence river from cape vincent to saint regis
1003 pm edt mon may 11 2026

.overnight...light and variable winds. becoming mainly
clear. 
.tuesday...light and variable winds becoming west 5 to 10 knots.
sunny.
.tuesday night...southwest winds 10 knots or less becoming
southeast. showers likely overnight. 
.wednesday...southeast winds 5 to 15 knots. showers.
.wednesday night...south winds 10 knots or less. showers.
.thursday...southwest winds 10 knots or less becoming north.
showers likely during the day, then a chance of showers thursday
night. 
.friday...north winds 10 knots or less becoming southwest. mostly
cloudy. 
.saturday...southwest winds 5 to 10 knots. partly cloudy. 

$$

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open lake forecast for lake ontario
national weather service buffalo ny
1002 pm edt mon may 11 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 30.3 inch high will settle from michigan to new york 
state by tuesday morning...then off the east coast by tuesday 
evening. a 29.7 inch low over the central great lakes tuesday night 
will then move to the ottawa valley wednesday...before drifting to 
the eastern seaboard thursday...the gulf of maine friday...and the 
canadian maritimes saturday.


loz063>065-120900-
lake ontario open waters from hamlin beach to the saint lawrence
river-
1002 pm edt mon may 11 2026

.overnight...northwest winds 5 to 10 knots becoming north.
waves 2 feet or less. 
.tuesday...north winds 10 knots or less becoming northeast. waves
1 foot or less. 
.tuesday night...east winds 5 to 15 knots becoming southeast
15 to 20 knots. a chance of showers in the evening, then showers
overnight. waves 1 to 3 feet. 
.wednesday...southeast winds 15 to 25 knots becoming southwest
and diminishing to 10 to 15 knots. showers. waves 3 to 5 feet
subsiding to 1 to 3 feet. 
.wednesday night...southwest winds 5 to 15 knots becoming west.
showers in the evening, then a chance of showers overnight. waves
1 to 2 feet. 
.thursday...west winds 5 to 10 knots becoming northwest. waves
1 to 2 feet. 
.friday...northwest winds 5 to 15 knots becoming west. waves 1 to
2 feet. 
.saturday...southwest winds 5 to 15 knots becoming west. waves
1 to 3 feet. 

$$