fzus61 kbuf 052003
glfsl 
expires:202605060300;;070505

forecast for the saint lawrence river
including the thousand islands region
national weather service buffalo ny
403 pm edt tue may 5 2026


slz022-024-060300-
saint lawrence river from cape vincent to saint regis
403 pm edt tue may 5 2026

...small craft advisory in effect until 8 pm edt this evening...

.tonight...west winds 15 to 20 knots becoming south and
diminishing to 10 knots or less after midnight. showers likely
with a chance of thunderstorms early, then showers from late
evening on. 
.wednesday...south winds less than 10 knots becoming southwest.
showers in the morning, then a chance of showers early in the
afternoon. 
.wednesday night...southwest winds 10 knots or less. mostly
cloudy. 
.thursday...southwest winds 10 knots or less. mostly sunny. 
.thursday night...southwest winds 5 to 10 knots. partly to mostly
cloudy. 
.friday...southwest winds 5 to 10 knots becoming south. a chance
of rain showers. 
.saturday...south winds 5 to 10 knots becoming southwest. a
chance of showers. 
.sunday...southwest winds 10 knots or less becoming west. a
chance of showers. 

winds and waves higher in and near thunderstorms.

$$

fzus61 kbuf 052002
glflo 
expires:202605060300;;070481

open lake forecast for lake ontario
national weather service buffalo ny
402 pm edt tue may 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 29.2 inch low over hudson bay this evening will weaken 
to 29.3 inches as it moves to northern quebec through wednesday. a 
trailing wavy cold front will slowly cross the lake through tonight, 
then 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. a 29.6 inch low 
will track across the lake early saturday, followed by a 29.7 inch 
low that will track near or just south of the lake for later sunday.


loz062-060300-
lake ontario open waters from the niagara river to hamlin beach-
402 pm edt tue may 5 2026

.tonight...southwest winds 15 to 25 knots becoming east and
diminishing to 5 to 10 knots after midnight. showers with a
chance of thunderstorms early, then showers from late evening on.
waves 3 to 6 feet subsiding to 1 to 2 feet. 
.wednesday...east winds 10 knots or less becoming southwest.
showers early, then a chance of showers late in the morning.
waves 1 foot or less. 
.wednesday night...west winds 5 to 10 knots becoming northwest.
waves 1 foot or less. 
.thursday...west winds 5 to 10 knots. waves 1 foot or less. 
.thursday night...west winds 5 to 10 knots. waves around 1 foot. 
.friday...west winds 5 to 10 knots becoming southwest. a chance
of showers friday night. waves 1 to 2 feet. 
.saturday...southwest winds 5 to 15 knots. a chance of showers.
waves 1 to 2 feet. 
.sunday...southwest winds 5 to 10 knots becoming northwest. a
chance of showers. waves 1 to 2 feet. 

winds and waves higher in and near thunderstorms.

$$

fzus61 kbuf 052002
glflo 
expires:202605060300;;070482

open lake forecast for lake ontario
national weather service buffalo ny
402 pm edt tue may 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 29.2 inch low over hudson bay this evening will weaken 
to 29.3 inches as it moves to northern quebec through wednesday. a 
trailing wavy cold front will slowly cross the lake through tonight, 
then 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. a 29.6 inch low 
will track across the lake early saturday, followed by a 29.7 inch 
low that will track near or just south of the lake for later sunday.


loz063>065-060300-
lake ontario open waters from hamlin beach to the saint lawrence
river-
402 pm edt tue may 5 2026

.tonight...west winds 15 to 25 knots becoming southeast and
diminishing to 10 knots or less after midnight. showers likely
with a chance of thunderstorms early, then showers late this
evening. rain after midnight. waves 4 to 7 feet subsiding to 1 to
3 feet. waves occasionally around 9 feet. 
.wednesday...northeast winds 5 to 10 knots becoming west. rain
early, then showers likely late in the morning. waves 2 feet or
less. 
.wednesday night...west winds 5 to 10 knots. waves 2 feet or
less. 
.thursday...west winds 5 to 15 knots. waves 1 to 2 feet. 
.thursday night...west winds 10 to 15 knots. waves 1 to 2 feet. 
.friday...west winds 5 to 15 knots becoming south. a chance of
showers friday night. waves 2 feet or less. 
.saturday...south winds 5 to 15 knots becoming southwest. a
chance of showers. waves 1 to 2 feet. 
.sunday...southwest winds 5 to 15 knots becoming northwest. a
chance of showers. waves 1 to 2 feet. 

winds and waves higher in and near thunderstorms.

$$