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forecast for the saint lawrence river
including the thousand islands region
national weather service buffalo ny
1003 am edt sun may 10 2026


slz022-024-102100-
saint lawrence river from cape vincent to saint regis
1003 am edt sun may 10 2026

.this afternoon...southwest winds 5 to 15 knots. a chance of
showers late. 
.tonight...west winds 5 to 15 knots becoming southwest less than
10 knots. becoming mainly clear. 
.monday...west winds 10 knots or less. a chance of rain showers
in the afternoon. 
.monday night...west winds 5 to 10 knots becoming light and
variable. a chance of rain showers in the evening. 
.tuesday...northwest winds 10 knots or less becoming southeast. a
chance of rain showers tuesday night. 
.wednesday...southeast winds 5 to 15 knots becoming south.
showers.
.thursday...south winds 10 knots or less becoming north. showers
likely. 

$$

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open lake forecast for lake ontario
national weather service buffalo ny
1002 am edt sun may 10 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 29.4 inch area of low pressure over western quebec 
this morning will move to northern quebec early monday. a 30.4 inch 
high will then build from the upper great lakes monday to the lower 
great lakes by tuesday. a 29.8 inch low will move across the great 
lakes wednesday, passing near or just to the north of the lake 
wednesday evening. a 30.1 inch area of high pressure will advance 
from the western great lakes region wednesday night to cresting 
over the lake thursday night and early friday.


loz063>065-102100-
lake ontario open waters from hamlin beach to the saint lawrence
river-
1002 am edt sun may 10 2026

.this afternoon...west winds 10 to 15 knots increasing to 15 to
20 knots. waves 2 to 4 feet. 
.tonight...west winds 15 to 20 knots becoming northwest 5 to
15 knots. waves 2 to 4 feet subsiding to 1 to 3 feet. 
.monday...west winds 5 to 15 knots. waves 1 to 3 feet. 
.monday night...west winds 5 to 15 knots becoming northwest.
waves 1 to 3 feet. 
.tuesday...northwest winds 5 to 10 knots becoming southeast and
increasing to 15 to 20 knots. rain showers tuesday night. waves
2 feet or less. 
.wednesday...southeast winds 15 to 20 knots becoming southwest
10 to 15 knots. showers. waves 2 to 4 feet subsiding to 1 to
3 feet. 
.thursday...west winds 5 to 15 knots becoming northwest. a chance
of showers. waves 2 feet or less. 

$$