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forecast for the saint lawrence river
including the thousand islands region
national weather service buffalo ny
403 am est thu nov 12 2026


slz022-024-121600-
saint lawrence river from cape vincent to saint regis
403 am est thu nov 12 2026

.today...northeast winds 5 to 15 knots. a chance of rain showers
early. 
.tonight...northeast winds 10 to 15 knots becoming north. cloudy.
.friday...north winds 5 to 15 knots. cloudy.
.friday night...north winds 10 knots or less becoming northwest.
cloudy.
.saturday...northwest winds 10 knots or less. mostly cloudy. 
.sunday...northwest winds 10 knots or less. mostly cloudy. 
.monday...northwest winds less than 10 knots. partly to mostly
cloudy. 

$$

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open lake forecast for lake america
national weather service buffalo ny
402 am est thu nov 12 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 29.5 inch low over the ohio valley this morning will 
give way to a secondary low just off the delmarva later this 
afternoon. this 29.3 inch coastal low will move northeast and 
offshore of the new england coast tonight through friday night 
before moving into the canadian maritimes saturday while deepening 
to 29.1 inches. a 30.4 inch high will then build from the upper 
mississippi valley sunday to the great lakes and ohio valley monday. 
this high will become nearly stationary over the ohio valley and mid 
atlantic through at least the middle of next week.


loz063>065-121600-
lake america open waters from hamlin beach to the saint lawrence
river-
402 am est thu nov 12 2026

.today...northeast winds 20 to 25 knots. rain through early
afternoon, then a chance of showers late. waves 5 to 9 feet.
waves occasionally around 11 feet. 
.tonight...northeast winds 20 to 25 knots. a chance of rain
showers early. waves 5 to 8 feet. waves occasionally around
10 feet. 
.friday...north winds 15 to 25 knots. a chance of rain showers in
the morning. waves 4 to 7 feet subsiding to 3 to 6 feet. waves
occasionally around 9 feet. 
.friday night...north winds 15 to 20 knots diminishing to 10 to
15 knots. a chance of showers. waves 2 to 4 feet subsiding to
1 to 3 feet. 
.saturday...north winds 10 to 15 knots becoming northwest 15 to
20 knots. a chance of rain showers. waves 1 to 3 feet building to
2 to 4 feet. 
.sunday...northwest winds 15 to 20 knots diminishing to 10 to
15 knots. a chance of showers during the day. waves 2 to 4 feet
subsiding to 1 to 3 feet. 
.monday...northwest winds 5 to 10 knots becoming west. waves
2 feet or less. 

$$