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forecast for the saint lawrence river
including the thousand islands region
national weather service buffalo ny
1002 am est tue dec 2 2025


slz022-022200-
saint lawrence river from cape vincent to ogdensburg-
1002 am est tue dec 2 2025

.rest of today...east winds 10 knots or less becoming northeast.
snow.
.tonight...north winds 5 to 10 knots becoming light and variable.
mostly cloudy. 
.wednesday...south winds 10 knots or less becoming southwest and
increasing to 15 to 20 knots. a chance of snow showers in the
afternoon. 
.wednesday night...southwest winds 15 to 20 knots becoming west.
snow and rain showers. 
.thursday...northwest winds 10 to 15 knots becoming south less
than 10 knots. snow showers during the day. 
.friday...south winds 5 to 15 knots. a chance of snow showers
friday night. 
.saturday...south winds 5 to 10 knots becoming northwest. a
chance of snow showers. 

$$

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forecast for the saint lawrence river
including the thousand islands region
national weather service buffalo ny
1002 am est tue dec 2 2025


slz024-022200-
saint lawrence river from ogdensburg to saint regis-
1002 am est tue dec 2 2025

.rest of today...east winds less than 10 knots becoming
northeast. snow late this morning, then scattered snow showers
early this afternoon. 
.tonight...northeast winds less than 10 knots. mostly cloudy. 
.wednesday...southwest winds 10 knots or less becoming south
10 to 15 knots. a chance of snow showers in the afternoon. 
.wednesday night...southwest winds 15 to 20 knots becoming west.
snow showers. 
.thursday...northwest winds 15 to 20 knots becoming southwest and
diminishing to less than 10 knots. snow showers during the day. 
.friday...south winds 5 to 10 knots. a chance of snow showers
friday night. 
.saturday...south winds 5 to 10 knots becoming west. a chance of
snow showers. 

$$

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open lake forecast for lake ontario
national weather service buffalo ny
1002 am est tue dec 2 2025

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 29.6 inch surface low off the carolina coastline 
this morning will deepen to 28.9 inches over southern atlantic 
canada by early wednesday morning before going out to sea. a 30.2 
inch surface high will build across the ohio valley and lower great 
lakes later wednesday into thursday morning before pushing off the 
coast. a large 29.2 inch surface low near hudson bay will push its 
cold front across the lake wednesday night, with another 30.4 inch 
high building in its wake thursday night. the high will then quickly 
move east of the lake friday. another cold front will cross the lake 
late saturday and saturday night, this from a 29.3 inch low near 
northern james bay.


loz064-065-022200-
lake ontario open waters from sodus bay to the saint lawrence
river-
1002 am est tue dec 2 2025

.this afternoon...southeast winds 5 to 15 knots becoming
northeast. snow, then scattered snow showers late. waves 2 feet
or less. 
.tonight...north winds 5 to 15 knots becoming northwest. waves
2 feet or less. 
.wednesday...southwest winds 10 to 15 knots increasing to
30 knots. a chance of snow showers in the afternoon. waves 2 feet
or less building to 5 to 8 feet. waves occasionally around
10 feet. 
.wednesday night...southwest winds to 30 knots becoming west.
snow and rain showers. waves 6 to 10 feet building to 8 to
12 feet. waves occasionally around 15 feet. 
.thursday...northwest winds to 30 knots becoming west and
diminishing to 10 to 15 knots. snow showers during the day, then
a chance of snow showers thursday night. waves 9 to 13 feet
subsiding to 3 to 6 feet. waves occasionally around 16 feet. 
.friday...south winds 15 to 20 knots. a chance of snow showers.
waves 3 to 5 feet. 
.saturday...southwest winds 15 to 25 knots becoming northwest. a
chance of snow showers. waves 3 to 6 feet building to 4 to
7 feet, then subsiding to 3 to 6 feet. waves occasionally around
9 feet. 

$$