fzus61 kbuf 210902
glflo 
expires:202511211600;;242460

open lake forecast for lake ontario
national weather service buffalo ny
402 am est fri nov 21 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 29.5 inch surface low near james bay will swing a cold 
front through the lower great lakes today, with a 30.1 inch high 
building over the ohio valley and lower great lakes saturday. a 29.5 
inch low will then move from northern ontario to james bay sunday, 
sending its cold front across the lake through the afternoon hours. 
a 30.2 inch high is then forecast to build across the ohio valley 
monday. on tuesday a 29.5 inch low to the north of lake superior 
will swing a cold front across the lake by tuesday night.


loz064-065-211600-
lake ontario open waters from sodus bay to the saint lawrence
river-
402 am est fri nov 21 2025

.today...southwest winds 15 to 25 knots becoming west. a chance
of showers this morning. waves 3 to 5 feet building to 4 to
7 feet. waves occasionally around 9 feet. 
.tonight...west winds 15 to 20 knots becoming northwest 10 to
15 knots. waves 3 to 6 feet subsiding to 1 to 3 feet. 
.saturday...northwest winds 5 to 15 knots. waves 1 to 3 feet. 
.saturday night...northwest winds 5 to 10 knots becoming
southwest. waves 2 feet or less. 
.sunday...southwest winds 15 to 20 knots becoming northwest. a
chance of rain showers. waves 1 to 3 feet building to 3 to
6 feet. 
.monday...west winds 5 to 15 knots becoming southeast. waves 2 to
4 feet subsiding to 1 to 3 feet. 
.tuesday...southeast winds 15 to 20 knots becoming south.
showers. waves 1 to 3 feet building to 2 to 4 feet. 

$$

fzus61 kbuf 210902
glfsl 
expires:202511211600;;242429

forecast for the saint lawrence river
including the thousand islands region
national weather service buffalo ny
402 am est fri nov 21 2025


slz022-211600-
saint lawrence river from cape vincent to ogdensburg-
402 am est fri nov 21 2025

.today...south winds 15 to 20 knots becoming southwest 5 to
15 knots. a chance of rain showers early, then rain showers
likely late this morning. a chance of rain showers early this
afternoon. 
.tonight...west winds 10 knots or less. partly cloudy. 
.saturday...northwest winds less than 10 knots becoming west.
mostly sunny. 
.saturday night...light and variable winds. partly cloudy in the
evening, then becoming mostly cloudy. 
.sunday...southwest winds 10 knots or less becoming west. a
chance of rain and snow showers during the day, then a chance of
rain showers sunday night. 
.monday...west winds 10 knots or less becoming south. partly
cloudy, then becoming mostly cloudy. 
.tuesday...southeast winds 5 to 10 knots becoming south. rain
showers likely. 

$$

fzus61 kbuf 210902
glfsl 
expires:202511211600;;242430

forecast for the saint lawrence river
including the thousand islands region
national weather service buffalo ny
402 am est fri nov 21 2025


slz024-211600-
saint lawrence river from ogdensburg to saint regis-
402 am est fri nov 21 2025

.today...south winds 10 to 15 knots becoming southwest 5 to
10 knots. a chance of snow showers early, then rain showers
likely late this morning. a chance of rain showers early this
afternoon. 
.tonight...west winds 10 knots or less. mostly cloudy. 
.saturday...west winds less than 10 knots. mostly sunny. 
.saturday night...west winds less than 10 knots. partly cloudy in
the evening, then becoming mostly cloudy. 
.sunday...south winds less than 10 knots becoming west. a chance
of rain and snow showers during the day, then a chance of rain
showers sunday night. 
.monday...west winds 10 knots or less becoming south. partly to
mostly cloudy. 
.tuesday...southeast winds 10 knots or less. rain showers likely.

$$