fzus61 kbuf 202004
glfsl 
expires:202605210300;;363028

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


slz022-024-210300-
saint lawrence river from cape vincent to saint regis
404 pm edt wed may 20 2026

.tonight...northwest winds 10 to 15 knots becoming north 15 to
20 knots. partly cloudy. 
.thursday...north winds 5 to 15 knots diminishing to less than
10 knots. sunny.
.thursday night...north winds less than 10 knots. mainly clear. 
.friday...light and variable winds. sunny.
.friday night...northeast winds less than 10 knots becoming east.
partly to mostly cloudy. 
.saturday...east winds 10 knots or less becoming southeast.
showers likely. 
.sunday...southeast winds 5 to 10 knots becoming south. showers
likely. 
.monday...south winds 10 knots or less becoming southwest.
showers likely during the day. 

$$

fzus61 kbuf 202003
glflo 
expires:202605210300;;362909

open lake forecast for lake ontario
national weather service buffalo ny
403 pm 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...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 through tuesday.


loz063>065-210300-
lake ontario open waters from hamlin beach to the saint lawrence
river-
403 pm edt wed may 20 2026

.tonight...west winds 15 to 25 knots becoming northeast. waves
3 to 6 feet. 
.thursday...northeast winds 15 to 20 knots becoming west 5 to
15 knots. waves 3 to 6 feet subsiding to 1 to 3 feet. 
.thursday night...northwest winds 10 knots or less becoming
northeast. waves 1 foot or less. 
.friday...east winds 5 to 15 knots becoming northeast. waves
2 feet or less. 
.friday night...northeast winds 10 to 15 knots becoming east. a
chance of showers overnight. waves 1 to 3 feet. 
.saturday...east winds 15 to 25 knots becoming southeast.
showers. waves 2 to 4 feet building to 3 to 6 feet. 
.sunday...southeast winds 15 to 25 knots becoming south and
diminishing to 10 to 15 knots. showers. waves 3 to 6 feet
subsiding to 1 to 3 feet. 
.monday...south winds 5 to 15 knots becoming west. showers likely
during the day. waves 2 feet or less. 

$$