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forecast for the saint lawrence river
including the thousand islands region
national weather service buffalo ny
1003 am edt wed jul 1 2026


slz022-024-012100-
saint lawrence river from cape vincent to saint regis
1003 am edt wed jul 1 2026

.this afternoon...southwest winds 5 to 10 knots. a chance of
showers and thunderstorms late. 
.tonight...southwest winds 5 to 15 knots. a chance of showers and
thunderstorms. 
.thursday...southwest winds 5 to 15 knots. showers likely with a
chance of thunderstorms in the afternoon. 
.thursday night...southwest winds 5 to 15 knots diminishing to
less than 10 knots. showers likely with a chance of thunderstorms
in the evening, then a chance of showers overnight. 
.friday...southwest winds 10 knots or less. mainly clear, then
becoming partly cloudy. 
.saturday...southwest winds less than 10 knots. a chance of
showers. 
.sunday...light and variable winds. a chance of showers. 

winds and waves higher in and near thunderstorms.

$$

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open lake forecast for lake ontario
national weather service buffalo ny
1002 am edt wed jul 1 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 30.1 inch high will remain anchored from the ohio 
valley to the mid atlantic today through friday. a weak cold front 
will then move slowly south across the great lakes saturday, then 
stall just south of the lake sunday.


loz063>065-012100-
lake ontario open waters from hamlin beach to the saint lawrence
river-
1002 am edt wed jul 1 2026

.this afternoon...southwest winds 5 to 15 knots becoming west.
waves 1 to 2 feet. 
.tonight...southwest winds 5 to 15 knots. a chance of showers and
thunderstorms late in the evening. waves 1 to 3 feet. 
.thursday...southwest winds 5 to 15 knots becoming west. waves
1 to 3 feet. 
.thursday night...southwest winds 5 to 15 knots becoming west. a
chance of showers in the evening, then a chance of showers and
thunderstorms overnight. waves 2 to 4 feet subsiding to 1 to
3 feet. 
.friday...west winds 5 to 15 knots. a chance of showers during
the day, then a chance of showers and thunderstorms friday night.
waves 1 to 3 feet. 
.saturday...west winds 10 knots or less becoming northwest. a
chance of showers and thunderstorms. waves 1 foot or less. 
.sunday...northeast winds less than 10 knots becoming west. a
chance of showers. waves 1 foot or less. 

winds and waves higher in and near thunderstorms.

$$