fzus61 kbuf 200812
glfsl 
expires:202604201500;;681636

forecast for the saint lawrence river
including the thousand islands region
national weather service buffalo ny
412 am edt mon apr 20 2026


slz022-024-201500-
saint lawrence river from cape vincent to saint regis
412 am edt mon apr 20 2026

.today...northwest winds 5 to 10 knots. mostly cloudy early, then
becoming mostly sunny. 
.tonight...west winds 10 knots or less becoming south. mainly
clear. 
.tuesday...south winds 5 to 10 knots becoming southwest. partly
sunny in the morning, then becoming mostly cloudy. 
.tuesday night...south winds 10 knots or less becoming east.
mostly cloudy. 
.wednesday...northeast winds less than 10 knots. partly cloudy. 
.thursday...northwest winds less than 10 knots becoming north.
partly to mostly cloudy. 
.friday...northeast winds less than 10 knots becoming east.
partly cloudy. 

$$

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glflo 
expires:202604201500;;681628

open lake forecast for lake ontario
national weather service buffalo ny
411 am edt mon apr 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 30.4 inch high will settle southeast across the great 
lakes through tonight, before sliding off the mid-atlantic coast 
tuesday. a 29.4 inch low over lower hudson bay tuesday, will weaken 
to 29.9 inches by wednesday, while pushing an attendant weak cold 
front across the lake tuesday night. a 30.2 inch high will then 
build across the great lakes region wednesday and thursday. a warm 
front will then approach the lake by friday. a 29.6 inch low may 
move southwest of the lake on saturday.


loz063>065-201500-
lake ontario open waters from hamlin beach to the saint lawrence
river-
411 am edt mon apr 20 2026

.today...northwest winds 15 to 20 knots becoming west. waves 3 to
5 feet subsiding to 2 to 4 feet. 
.tonight...west winds 15 to 20 knots becoming southwest 5 to
15 knots. waves 2 to 4 feet subsiding to 1 to 3 feet. 
.tuesday...southwest winds 5 to 15 knots becoming southeast.
waves 1 to 2 feet. 
.tuesday night...southeast winds 5 to 15 knots. waves 2 feet or
less. 
.wednesday...northeast winds 10 knots or less becoming north.
waves 1 foot or less. 
.thursday...northwest winds 10 knots or less becoming northeast.
waves 1 foot or less. 
.friday...northeast winds 5 to 15 knots becoming east. a chance
of showers friday night. waves 1 to 3 feet. 

$$