fzus61 kbuf 201403
glfsl 
expires:202605202100;;348883

forecast for the saint lawrence river
including the thousand islands region
national weather service buffalo ny
1003 am edt wed may 20 2026


slz022-024-202100-
saint lawrence river from cape vincent to saint regis
1003 am edt wed may 20 2026

.this afternoon...west winds 10 to 15 knots. mostly sunny. 
.tonight...northwest winds 5 to 10 knots becoming north. mainly
clear early, then becoming partly cloudy. 
.thursday...north winds 10 knots or less. sunny.
.thursday night...north winds less than 10 knots. mainly clear in
the evening, then becoming partly cloudy. 
.friday...east winds less than 10 knots. partly cloudy, then
becoming mostly cloudy. 
.saturday...east winds 5 to 10 knots becoming southeast. a chance
of showers during the day, then showers likely saturday night. 
.sunday...southeast winds 5 to 10 knots becoming south. showers
likely. 

$$

fzus61 kbuf 201402
glflo 
expires:202605202100;;348824

open lake forecast for lake ontario
national weather service buffalo ny
1002 am edt wed may 20 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...behind a passing cold front this morning, a large 30.4 
inch area of surface high pressure will build across the entire 
great lakes region through thursday, before sliding east off the new 
england coast late friday. this surface high will then strengthen to 
30.6 inches as it anchors over atlantic canada through sunday. a 
29.9 inch low and attendant warm front will then slowly approach the 
lake late friday night and saturday, before weakening and sliding 
eastward sunday. a 30.1 inch high will settle across the region 
monday.


loz062-202100-
lake ontario open waters from the niagara river to hamlin beach-
1002 am edt wed may 20 2026

.this afternoon...west winds 10 to 15 knots. waves 1 to 3 feet. 
.tonight...northwest winds 10 to 15 knots becoming north. waves
1 to 3 feet. 
.thursday...northeast winds 5 to 15 knots becoming southeast.
waves 2 feet or less. 
.thursday night...east winds less than 10 knots. waves 1 foot or
less. 
.friday...east winds 15 to 20 knots. showers likely friday night.
waves 1 to 3 feet building to 2 to 4 feet. 
.saturday...east winds to 30 knots becoming southeast and
diminishing to 15 to 20 knots. showers. waves 5 to 8 feet
subsiding to 3 to 6 feet. waves occasionally around 10 feet. 
.sunday...southeast winds 15 to 20 knots diminishing to 5 to
15 knots. showers likely. waves 2 to 4 feet subsiding to 1 to
3 feet. 

$$

fzus61 kbuf 201402
glflo 
expires:202605202100;;348825

open lake forecast for lake ontario
national weather service buffalo ny
1002 am edt wed may 20 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...behind a passing cold front this morning, a large 30.4 
inch area of surface high pressure will build across the entire 
great lakes region through thursday, before sliding east off the new 
england coast late friday. this surface high will then strengthen to 
30.6 inches as it anchors over atlantic canada through sunday. a 
29.9 inch low and attendant warm front will then slowly approach the 
lake late friday night and saturday, before weakening and sliding 
eastward sunday. a 30.1 inch high will settle across the region 
monday.


loz063>065-202100-
lake ontario open waters from hamlin beach to the saint lawrence
river-
1002 am edt wed may 20 2026

.this afternoon...west winds 15 to 20 knots. waves 3 to 6 feet. 
.tonight...west winds 15 to 20 knots becoming north. waves 3 to
6 feet subsiding to 1 to 3 feet. 
.thursday...northeast winds 15 to 20 knots becoming northwest
5 to 15 knots. waves 1 to 3 feet. 
.thursday night...west winds less than 10 knots. waves 1 foot or
less. 
.friday...east winds 5 to 15 knots increasing to 15 to 20 knots.
a chance of showers friday night. waves 1 to 3 feet. 
.saturday...southeast winds 15 to 25 knots. showers. waves 3 to
5 feet building to 4 to 7 feet, then subsiding to 3 to 6 feet.
waves occasionally around 9 feet. 
.sunday...southeast winds 15 to 25 knots. showers likely. waves
3 to 5 feet subsiding to 1 to 3 feet. 

$$