fzus61 kbuf 271502
glflo 
expires:202511272200;;598567

open lake forecast for lake ontario
national weather service buffalo ny
1002 am est thu nov 27 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 29.3 inch surface low will slowly track east across 
central quebec today through friday. meanwhile, a 30.5 inch surface 
high will build south into the mid-mississippi valley friday, then 
to the ohio valley and lower great lakes saturday. another surface 
low will cut northeastward through the central great lakes sunday, 
slowly deepening from 29.6 inches sunday morning to 29.4 inches 
sunday night over western quebec. a 30.4 inch surface high centered 
over the central plains will then build east across the great lakes 
monday.


loz064-065-272200-
lake ontario open waters from sodus bay to the saint lawrence
river-
1002 am est thu nov 27 2025

...gale warning in effect through friday evening...

.rest of today...southwest gales to 35 knots becoming west to
40 knots. lake effect snow. waves 13 to 17 feet. waves
occasionally around 22 feet. 
.tonight...west gales to 35 knots in the evening. lake effect
snow in the evening, then lake effect snow showers with a few
rumbles of thunder possible after midnight. waves 12 to 17 feet
subsiding to 10 to 15 feet. waves occasionally around 22 feet. 
.friday...west winds to 30 knots increasing to 35 knot gales.
snow showers. waves 10 to 15 feet. waves occasionally around
19 feet. 
.friday night...northwest winds to 30 knots. a chance of snow
showers. waves 10 to 14 feet subsiding to 6 to 9 feet. waves
occasionally around 18 feet. 
.saturday...northwest winds 15 to 25 knots becoming southeast.
lake effect snow showers likely saturday night. waves 4 to 7 feet
subsiding to 3 to 5 feet. waves occasionally around 9 feet. 
.sunday...south gales to 35 knots becoming west and diminishing
to 30 knots. lake effect rain and snow showers during the day,
then lake effect rain showers with a chance of lake effect snow
showers sunday night. waves 5 to 8 feet building to 7 to 10 feet.
waves occasionally around 13 feet. 
.monday...northwest winds 15 to 25 knots becoming southeast and
diminishing to 10 to 15 knots. a chance of lake effect snow
showers. waves 6 to 9 feet subsiding to 2 feet or less. waves
occasionally around 11 feet. 

$$

fzus61 kbuf 271502
glfsl 
expires:202511272200;;598563

forecast for the saint lawrence river
including the thousand islands region
national weather service buffalo ny
1002 am est thu nov 27 2025


slz022-272200-
saint lawrence river from cape vincent to ogdensburg-
1002 am est thu nov 27 2025

...small craft advisory in effect until 10 pm est this evening...

.this afternoon...southwest winds 15 to 20 knots. lake effect
snow. 
.tonight...southwest winds 15 to 25 knots becoming west. snow
likely in the evening, then snow showers likely after midnight. 
.friday...west winds 15 to 20 knots. a chance of snow showers. 
.friday night...west winds 15 to 20 knots diminishing to 5 to
15 knots. a chance of snow showers in the evening. 
.saturday...west winds 5 to 10 knots becoming southeast. lake
effect snow showers likely saturday night. 
.sunday...southeast winds 10 to 15 knots becoming west. lake
effect snow and rain showers. 
.monday...west winds 10 knots or less becoming east. a chance of
lake effect snow showers during the day. 

$$

fzus61 kbuf 271502
glfsl 
expires:202511272200;;598564

forecast for the saint lawrence river
including the thousand islands region
national weather service buffalo ny
1002 am est thu nov 27 2025


slz024-272200-
saint lawrence river from ogdensburg to saint regis-
1002 am est thu nov 27 2025

...small craft advisory in effect until 10 pm est this evening...

.this afternoon...southwest winds 15 to 20 knots. snow likely. 
.tonight...southwest winds 15 to 20 knots. snow likely in the
evening, then snow showers likely after midnight. 
.friday...west winds 15 to 20 knots. a chance of snow showers. 
.friday night...west winds 15 to 20 knots diminishing to 10 to
15 knots. a chance of snow showers in the evening. 
.saturday...west winds 10 knots or less becoming southeast. lake
effect snow showers likely saturday night. 
.sunday...southeast winds 5 to 15 knots becoming west. lake
effect snow and rain showers. 
.monday...west winds 10 knots or less becoming northeast. a
chance of lake effect snow showers during the day. 

$$