fzus61 kbuf 051409
glfsl 
expires:202604052100;;874464

forecast for the saint lawrence river
including the thousand islands region
national weather service buffalo ny
1008 am edt sun apr 5 2026


slz022-024-052100-
saint lawrence river from cape vincent to saint regis
1008 am edt sun apr 5 2026

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

.this afternoon...southwest winds 10 to 15 knots increasing to
15 to 20 knots. a chance of showers. 
.tonight...west winds 15 to 20 knots diminishing to 5 to
15 knots. a chance of rain showers early, then a chance of rain
and snow showers. a chance of snow showers late. 
.monday...west winds 5 to 10 knots. a chance of snow showers in
the morning. 
.monday night...west winds 10 knots or less becoming north. a
chance of rain and snow showers in the evening, then snow showers
likely overnight. 
.tuesday...north winds 5 to 15 knots becoming southwest less than
10 knots. a chance of snow showers during the day. 
.wednesday...southwest winds 5 to 15 knots becoming south 15 to
20 knots. mainly clear, then becoming mostly cloudy. 
.thursday...south winds 15 to 25 knots becoming southwest. a
chance of rain showers. 

$$

fzus61 kbuf 051407
glflo 
expires:202604052100;;874449

open lake forecast for lake ontario
national weather service buffalo ny
1007 am edt sun apr 5 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 29.3 inch surface low near southwest quebec this early 
morning will carry a cold front from just east of the lake to new 
england today. a secondary cold front then follow and cross the lake 
tonight and monday. a 30.5 inch high will then build across the 
great lakes tuesday and tuesday night, before sliding east and off 
the new england coast wednesday. a 29.6 inch surface low will then 
track northeast across the ontario province, dragging a pair of 
fronts, warm then cold, across the lake thursday.


loz062-052100-
lake ontario open waters from the niagara river to hamlin beach-
1007 am edt sun apr 5 2026

.rest of today...west winds 20 to 25 knots. a chance of rain
showers late this morning. waves 4 to 7 feet. waves occasionally
around 9 feet. 
.tonight...west winds 15 to 25 knots. waves 4 to 7 feet subsiding
to 3 to 6 feet. waves occasionally around 9 feet. 
.monday...west winds 15 to 20 knots diminishing to 5 to 15 knots.
a chance of rain and snow showers in the afternoon. waves 3 to
5 feet subsiding to 1 to 3 feet. 
.monday night...west winds 5 to 15 knots becoming northwest and
increasing to 15 to 25 knots. snow showers with rain showers
likely. waves 1 to 2 feet building to 3 to 5 feet. 
.tuesday...northwest winds 15 to 25 knots becoming west and
diminishing to 5 to 15 knots. snow showers likely during the day.
waves 4 to 6 feet subsiding to 1 to 3 feet. 
.wednesday...south winds 5 to 15 knots increasing to 15 to
25 knots. waves 2 feet or less building to 3 to 5 feet. 
.thursday...southwest winds 15 to 25 knots. a chance of showers.
waves 3 to 6 feet subsiding to 2 to 4 feet. 

$$

fzus61 kbuf 051407
glflo 
expires:202604052100;;874450

open lake forecast for lake ontario
national weather service buffalo ny
1007 am edt sun apr 5 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 29.3 inch surface low near southwest quebec this early 
morning will carry a cold front from just east of the lake to new 
england today. a secondary cold front then follow and cross the lake 
tonight and monday. a 30.5 inch high will then build across the 
great lakes tuesday and tuesday night, before sliding east and off 
the new england coast wednesday. a 29.6 inch surface low will then 
track northeast across the ontario province, dragging a pair of 
fronts, warm then cold, across the lake thursday.


loz063>065-052100-
lake ontario open waters from hamlin beach to the saint lawrence
river-
1007 am edt sun apr 5 2026

.rest of today...west winds 15 to 25 knots. a chance of rain
showers late this morning. a chance of rain showers late. waves
3 to 6 feet building to 5 to 8 feet. waves occasionally around
10 feet. 
.tonight...west winds 15 to 25 knots. waves 6 to 9 feet. waves
occasionally around 11 feet. 
.monday...west winds 15 to 20 knots diminishing to 10 to
15 knots. waves 4 to 7 feet subsiding to 1 to 3 feet. waves
occasionally around 9 feet. 
.monday night...west winds 5 to 10 knots becoming northwest and
increasing to 15 to 20 knots. a chance of rain and snow showers
in the evening, then snow and rain showers likely overnight.
waves 1 to 3 feet building to 3 to 5 feet. 
.tuesday...northwest winds 15 to 25 knots becoming west and
diminishing to 10 to 15 knots. snow showers likely during the
day. waves 4 to 7 feet subsiding to 2 to 4 feet. waves
occasionally around 9 feet. 
.wednesday...south winds 5 to 10 knots increasing to 30 knots.
waves 1 to 3 feet building to 4 to 7 feet. waves occasionally
around 9 feet. 
.thursday...south winds to 30 knots becoming southwest 15 to
25 knots. a chance of rain showers. waves 5 to 8 feet subsiding
to 3 to 6 feet. waves occasionally around 10 feet. 

$$