fzus61 kbuf 190753
glfsl 
expires:202512191000;;845636

forecast for the saint lawrence river
including the thousand islands region
national weather service buffalo ny
253 am est fri dec 19 2025


slz022-191000-
saint lawrence river from cape vincent to ogdensburg-
253 am est fri dec 19 2025

...small craft advisory in effect through this evening...

.overnight...south winds 15 to 25 knots. showers.
.friday...south winds 15 to 25 knots becoming southwest. rain
showers in the morning, then a chance of rain showers early in
the afternoon. a chance of snow and rain showers late. 
.friday night...west winds 15 to 25 knots. a chance of snow
showers in the evening. 
.saturday...west winds 5 to 15 knots becoming south. mostly sunny
in the morning, then becoming mostly cloudy. 
.saturday night...south winds 15 to 20 knots becoming southwest.
a chance of snow and rain showers in the evening, then lake
effect snow and rain showers likely overnight. 
.sunday...west winds 15 to 20 knots becoming northwest 5 to
15 knots. snow showers likely during the day. 
.monday...west winds 10 knots or less becoming south. a chance of
snow showers monday night. 
.tuesday...south winds 5 to 10 knots becoming west. snow showers
with rain showers likely during the day, then snow and rain
showers likely tuesday night. 

$$

fzus61 kbuf 190753
glfsl 
expires:202512191000;;845637

forecast for the saint lawrence river
including the thousand islands region
national weather service buffalo ny
253 am est fri dec 19 2025


slz024-191000-
saint lawrence river from ogdensburg to saint regis-
253 am est fri dec 19 2025

...small craft advisory in effect through this evening...

.overnight...south winds 15 to 25 knots. showers.
.friday...south winds to 30 knots becoming southwest. rain
showers through early afternoon, then a chance of snow showers
late. 
.friday night...southwest winds to 30 knots becoming west 15 to
25 knots. a chance of snow showers in the evening. 
.saturday...west winds 15 to 20 knots becoming south and
diminishing to 5 to 10 knots. sunny in the morning, then becoming
partly sunny. 
.saturday night...south winds 10 to 15 knots becoming southwest
15 to 20 knots. a chance of snow showers. 
.sunday...southwest winds 15 to 20 knots becoming west 10 to
15 knots. a chance of snow showers during the day. 
.monday...west winds 5 to 10 knots becoming south. a chance of
snow showers monday night. 
.tuesday...south winds 5 to 10 knots becoming west. snow showers.

$$

fzus61 kbuf 190302
glflo 
expires:202512191000;;834233

open lake forecast for lake ontario
national weather service buffalo ny
1002 pm est thu dec 18 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 29.0 inch low near lake superior will deepen to 28.9 
inches while moving to central quebec by friday, with its trailing 
strong cold front crossing the lake early friday morning. in its 
wake, a 30.1 inch high will slowly build across the lake friday 
night and early saturday, then will drift off the atlantic coastline 
later saturday and saturday night, with a 29.5 inch low moving 
across ontario and quebec and pushing its attendant cold front 
across the lake sunday. a large 30.6 inch high will then build east 
across the lake monday.


loz064-065-191000-
lake ontario open waters from sodus bay to the saint lawrence
river-
1002 pm est thu dec 18 2025

...gale warning in effect from 7 am est friday through late
friday night...

.overnight...southeast winds to 30 knots becoming south.
showers. waves 5 to 9 feet. waves occasionally around 11 feet. 
.friday...southwest winds to 30 knots becoming west and
increasing to 45 knot gales in the afternoon. rain in the
morning, then a chance of snow showers and rain in the afternoon.
waves 6 to 9 feet building to 15 to 20 feet. waves occasionally
around 26 feet. 
.friday night...west gales to 45 knots diminishing to 30 knots. a
chance of snow showers. waves 16 to 21 feet subsiding to 11 to
15 feet. waves occasionally around 27 feet. 
.saturday...west winds 15 to 25 knots becoming south. waves 7 to
10 feet subsiding to 3 to 6 feet. waves occasionally around
13 feet. 
.saturday night...south winds to 30 knots becoming southwest and
increasing to 35 knot gales overnight. a chance of rain showers
in the evening, then a chance of rain and snow showers overnight.
waves 3 to 6 feet building to 10 to 13 feet. waves occasionally
around 16 feet. 
.sunday...west gales to 40 knots becoming northwest and
diminishing to 15 to 25 knots. lake effect snow showers likely.
waves 12 to 17 feet subsiding to 7 to 10 feet. waves occasionally
around 22 feet. 
.monday...northwest winds 15 to 20 knots becoming south. a chance
of snow showers monday night. waves 3 to 5 feet subsiding to 1 to
3 feet. 
.tuesday...south winds 15 to 25 knots becoming northwest. rain
and snow showers likely during the day, then a chance of rain
showers tuesday night. waves 3 to 6 feet building to 4 to 7 feet.
waves occasionally around 9 feet. 

$$