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forecast for the saint lawrence river
including the thousand islands region
national weather service buffalo ny
403 pm edt wed jul 15 2026


slz022-024-160300-
saint lawrence river from cape vincent to saint regis
403 pm edt wed jul 15 2026

.tonight...west winds 5 to 10 knots. smoke.
.thursday...southwest winds 10 knots or less becoming northwest
10 to 15 knots. smoke.
.thursday night...northwest winds 10 knots or less. smoke.
.friday...northwest winds less than 10 knots becoming west. areas
of smoke in the morning. 
.friday night...southwest winds less than 10 knots becoming
south. a chance of showers overnight. 
.saturday...south winds 5 to 10 knots becoming northwest. showers
with a chance of thunderstorms. 
.sunday...northwest winds 5 to 10 knots becoming light and
variable. a chance of showers during the day. 
.monday...southwest winds 10 knots or less becoming south. a
chance of showers monday night. 

winds and waves higher in and near thunderstorms.

$$

fzus61 kbuf 152002
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open lake forecast for lake ontario
national weather service buffalo ny
402 pm edt wed jul 15 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 cold front will cross the lower great lakes today,
followed by a secondary cold front pushing south across the lower 
great lakes thursday night into friday. a weak 29.8 inch low over 
the upper great lakes friday, will move southeast into the lower 
great lakes on saturday, before deepening to 29.6 inches as it 
passes across new england sunday. meanwhile, a weak 29.9 inch high 
will slide across the great lakes sunday.


loz063>065-160300-
lake ontario open waters from hamlin beach to the saint lawrence
river-
402 pm edt wed jul 15 2026

.tonight...west winds 15 to 20 knots becoming northwest 5 to
15 knots. smoke. waves 2 to 4 feet subsiding to 1 to 2 feet. 
.thursday...west winds 5 to 15 knots increasing to 15 to
20 knots. smoke. waves 1 to 3 feet building to 2 to 4 feet. 
.thursday night...west winds 15 to 20 knots becoming north 5 to
15 knots. smoke. waves 3 to 5 feet subsiding to 1 to 3 feet. 
.friday...northeast winds 10 knots or less becoming south. areas
of smoke in the morning. waves 2 feet or less. 
.friday night...south winds 5 to 15 knots becoming southeast. a
chance of showers overnight. waves 2 feet or less. 
.saturday...south winds 15 to 20 knots becoming northwest.
showers with a chance of thunderstorms. waves 1 to 2 feet
building to 3 to 5 feet. 
.sunday...northwest winds 15 to 20 knots becoming west 5 to
15 knots. a chance of showers during the day. waves 2 to 4 feet
subsiding to 1 foot or less. 
.monday...southwest winds 5 to 10 knots becoming south and
increasing to 15 to 20 knots. a chance of showers monday night.
waves 1 foot or less building to 2 to 4 feet. 

winds and waves higher in and near thunderstorms.

$$