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forecast for the saint lawrence river
including the thousand islands region
national weather service buffalo ny
1003 am edt wed may 6 2026


slz022-024-062100-
saint lawrence river from cape vincent to saint regis
1003 am edt wed may 6 2026

.this afternoon...north winds 5 to 15 knots becoming northeast.
showers.
.tonight...southwest winds 10 knots or less. mostly cloudy
through the early overnight, then becoming partly cloudy. 
.thursday...west winds 5 to 15 knots becoming southwest. mostly
sunny. 
.thursday night...southwest winds 5 to 15 knots diminishing to
less than 10 knots. partly to mostly cloudy. 
.friday...southwest winds 5 to 10 knots. a chance of rain showers
friday night. 
.saturday...southwest winds 5 to 15 knots becoming south. a
chance of rain showers. 
.sunday...southwest winds 10 knots or less becoming west. a
chance of showers. 

$$

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open lake forecast for lake ontario
national weather service buffalo ny
1002 am edt wed may 6 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 29.2 inch low over hudson bay will weaken to 29.3 
inches as it moves to northern quebec today. a 30.1 inch high over 
the tennessee and ohio valleys thursday will slide to the mid-
atlantic coastline friday. a 29.6 inch low will track across the 
lake early saturday, followed by a 29.7 inch low that will track 
near or just south of the lake for later sunday.


loz062-062100-
lake ontario open waters from the niagara river to hamlin beach-
1002 am edt wed may 6 2026

.rest of today...northeast winds 5 to 15 knots becoming
northwest. a chance of showers. waves 1 to 2 feet. 
.tonight...west winds 10 knots or less becoming northwest. waves
1 foot or less. 
.thursday...northwest winds 10 knots or less becoming southwest.
waves 1 foot or less. 
.thursday night...southwest winds 5 to 10 knots. waves 1 foot or
less. 
.friday...southwest winds 5 to 15 knots. a chance of showers
friday night. waves 1 to 2 feet. 
.saturday...south winds 5 to 15 knots becoming southwest. a
chance of showers. waves 1 to 3 feet. 
.sunday...west winds 5 to 10 knots becoming northwest. a chance
of showers. waves 1 to 2 feet. 

$$

fzus61 kbuf 061402
glflo 
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open lake forecast for lake ontario
national weather service buffalo ny
1002 am edt wed may 6 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 29.2 inch low over hudson bay will weaken to 29.3 
inches as it moves to northern quebec today. a 30.1 inch high over 
the tennessee and ohio valleys thursday will slide to the mid-
atlantic coastline friday. a 29.6 inch low will track across the 
lake early saturday, followed by a 29.7 inch low that will track 
near or just south of the lake for later sunday.


loz063>065-062100-
lake ontario open waters from hamlin beach to the saint lawrence
river-
1002 am edt wed may 6 2026

.rest of today...northeast winds 10 to 15 knots becoming
northwest. showers late this morning, then a chance of showers
early this afternoon. waves 1 to 3 feet. 
.tonight...west winds 5 to 15 knots. waves 2 feet or less. 
.thursday...west winds 5 to 10 knots increasing to 15 to
20 knots. waves 1 to 3 feet. 
.thursday night...west winds 5 to 15 knots. waves 1 to 3 feet. 
.friday...west winds 5 to 15 knots becoming south. a chance of
showers friday night. waves 2 feet or less. 
.saturday...south winds 5 to 15 knots increasing to 15 to
20 knots. a chance of showers. waves 1 to 3 feet. 
.sunday...southwest winds 5 to 15 knots becoming northwest. a
chance of showers. waves 1 to 3 feet. 

$$