fzus61 kbuf 042003
glfsl 
expires:202605050300;;015813

forecast for the saint lawrence river
including the thousand islands region
national weather service buffalo ny
403 pm edt mon may 4 2026


slz022-024-050300-
saint lawrence river from cape vincent to saint regis
403 pm edt mon may 4 2026

.tonight...southwest winds 15 to 20 knots becoming south 5 to
15 knots. partly to mostly cloudy. 
.tuesday...southwest winds 10 to 15 knots. a chance of showers
early, then showers from late morning on. 
.tuesday night...west winds 10 knots or less becoming southwest.
showers in the evening, then rain overnight. 
.wednesday...southwest winds less than 10 knots becoming
northwest. rain in the morning, then showers likely in the
afternoon. 
.wednesday night...west winds less than 10 knots becoming
southwest. a chance of rain showers in the evening. 
.thursday...west winds 10 knots or less. partly to mostly cloudy.
.friday...west winds 10 knots or less becoming southwest. a
chance of rain showers. 
.saturday...southwest winds 10 knots or less. a chance of rain
showers. 

$$

fzus61 kbuf 042002
glflo 
expires:202605050300;;015752

open lake forecast for lake ontario
national weather service buffalo ny
402 pm edt mon may 4 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 29.1 inch low over hudson bay tonight through tuesday 
will weaken to 29.3 inches as it moves to northern quebec through 
wednesday. its trailing wavy cold front will slowly cross the lake 
late tuesday, then will drift across new england wednesday and out 
to sea thursday. a 30.1 inch high over the tennessee and ohio 
valleys thursday night will slide to the mid-atlantic coastline 
friday.


loz062-050300-
lake ontario open waters from the niagara river to hamlin beach-
402 pm edt mon may 4 2026

.tonight...southwest winds 15 to 20 knots. a chance of showers
late this evening. waves 2 to 4 feet building to 3 to 5 feet. 
.tuesday...southwest winds 15 to 20 knots becoming west 10 to
15 knots. a chance of showers through early afternoon, then
showers likely late. waves 3 to 5 feet subsiding to 1 to 3 feet. 
.tuesday night...southwest winds 5 to 10 knots becoming east.
rain likely in the evening, then rain overnight. waves 2 feet or
less. 
.wednesday...northeast winds 5 to 10 knots becoming west. rain in
the morning, then showers likely in the afternoon. waves 1 foot
or less. 
.wednesday night...west winds 5 to 10 knots. waves 1 foot or
less. 
.thursday...west winds 5 to 10 knots. waves 1 foot or less. 
.friday...west winds 5 to 10 knots becoming southwest. waves 1 to
2 feet. 
.saturday...southwest winds 5 to 10 knots becoming west. a chance
of showers. waves 1 to 2 feet. 

$$

fzus61 kbuf 042002
glflo 
expires:202605050300;;015753

open lake forecast for lake ontario
national weather service buffalo ny
402 pm edt mon may 4 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 29.1 inch low over hudson bay tonight through tuesday 
will weaken to 29.3 inches as it moves to northern quebec through 
wednesday. its trailing wavy cold front will slowly cross the lake 
late tuesday, then will drift across new england wednesday and out 
to sea thursday. a 30.1 inch high over the tennessee and ohio 
valleys thursday night will slide to the mid-atlantic coastline 
friday.


loz063>065-050300-
lake ontario open waters from hamlin beach to the saint lawrence
river-
402 pm edt mon may 4 2026

.tonight...south winds 10 to 15 knots increasing to 15 to
20 knots. a chance of showers after midnight. waves 1 to 3 feet
building to 2 to 4 feet. 
.tuesday...southwest winds 15 to 20 knots becoming west 10 to
15 knots. a chance of showers early, then showers likely late in
the morning. showers likely with a chance of thunderstorms in the
afternoon. waves 2 to 4 feet. 
.tuesday night...west winds 5 to 15 knots becoming south less
than 10 knots. rain with a chance of thunderstorms in the
evening, then rain overnight. waves 1 to 3 feet subsiding to
1 foot or less. 
.wednesday...north winds 5 to 10 knots becoming northwest. rain
in the morning, then showers in the afternoon. waves 1 foot or
less. 
.wednesday night...west winds 5 to 10 knots. a chance of showers.
waves 2 feet or less. 
.thursday...west winds 5 to 15 knots. waves 1 to 2 feet. 
.friday...west winds 5 to 15 knots becoming southwest. waves 1 to
3 feet. 
.saturday...southwest winds 5 to 15 knots. a chance of showers.
waves 1 to 2 feet. 

winds and waves higher in and near thunderstorms.

$$