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(1/4)
Latest Great Lakes Marine Forecast by KBUF
Issued 12/11/2025 4:02 PM America/New_York.
Valid through 12/11/2025 11:00 PM America/New_York.
fzus61 kbuf 112102
glflo
expires:202512120400;;410362
open lake forecast for lake ontario
national weather service buffalo ny
402 pm est thu dec 11 2025
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 28.9 inch low will remain over the canadian maritimes
through friday before moving into the north atlantic by saturday. a
30.1 inch high will build from the upper ohio valley friday to off
the mid atlantic coast saturday. a 29.6 inch low will then move from
just east of lake superior saturday to southern quebec by sunday
where it will weaken to a 29.9 inch trough. a strong 30.8 inch high
will then build from the mid mississippi valley sunday to the
southeast states monday while weakening to 30.5 inches.
loz063-120400-
lake ontario open waters from hamlin beach to sodus bay-
402 pm est thu dec 11 2025
...gale warning in effect until 10 pm est this evening...
.tonight...northwest winds to 30 knots becoming west. a chance of
snow showers. waves 7 to 11 feet subsiding to 5 to 8 feet. waves
occasionally around 14 feet.
.friday...west winds 15 to 25 knots. a chance of snow showers.
waves 5 to 8 feet. waves occasionally around 10 feet.
.friday night...west winds 15 to 20 knots becoming southwest. a
chance of snow showers overnight. waves 3 to 6 feet subsiding to
2 to 4 feet.
.saturday...southwest winds 15 to 20 knots becoming west and
increasing to 30 knots. lake effect snow showers likely. waves
2 to 4 feet building to 10 to 13 feet. waves occasionally around
16 feet.
.saturday night...west winds to 30 knots. lake effect snow
showers. waves 8 to 12 feet subsiding to 5 to 9 feet. waves
occasionally around 15 feet.
.sunday...west winds 15 to 25 knots becoming northwest. snow
showers during the day, then a chance of snow showers sunday
night. waves 5 to 8 feet subsiding to 3 to 5 feet. waves
occasionally around 10 feet.
.monday...northwest winds 15 to 25 knots becoming west to
30 knots. a chance of snow showers during the day, then snow
showers likely monday night. waves 2 to 4 feet building to 6 to
10 feet. waves occasionally around 13 feet.
.tuesday...west winds 15 to 25 knots becoming southwest. a chance
of snow showers during the day. waves 7 to 10 feet subsiding to
3 to 5 feet. waves occasionally around 13 feet.
$$
(2/4)
Latest Great Lakes Marine Forecast by KBUF
Issued 12/11/2025 4:02 PM America/New_York.
Valid through 12/11/2025 11:00 PM America/New_York.
fzus61 kbuf 112102
glflo
expires:202512120400;;410363
open lake forecast for lake ontario
national weather service buffalo ny
402 pm est thu dec 11 2025
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 28.9 inch low will remain over the canadian maritimes
through friday before moving into the north atlantic by saturday. a
30.1 inch high will build from the upper ohio valley friday to off
the mid atlantic coast saturday. a 29.6 inch low will then move from
just east of lake superior saturday to southern quebec by sunday
where it will weaken to a 29.9 inch trough. a strong 30.8 inch high
will then build from the mid mississippi valley sunday to the
southeast states monday while weakening to 30.5 inches.
loz064-065-120400-
lake ontario open waters from sodus bay to the saint lawrence
river-
402 pm est thu dec 11 2025
...gale warning in effect until 10 pm est this evening...
.tonight...northwest winds to 30 knots becoming west. waves 9 to
12 feet subsiding to 5 to 8 feet. waves occasionally around
15 feet.
.friday...west winds 15 to 25 knots. a chance of snow showers.
waves 5 to 8 feet. waves occasionally around 10 feet.
.friday night...west winds 15 to 20 knots becoming southwest
10 to 15 knots. a chance of snow showers. waves 3 to 6 feet
subsiding to 2 to 4 feet.
.saturday...south winds 15 to 20 knots becoming west and
increasing to 30 knots. lake effect snow showers. waves 2 to
4 feet building to 10 to 13 feet. waves occasionally around
16 feet.
.saturday night...west winds to 30 knots diminishing to 15 to
25 knots. lake effect snow showers. waves 10 to 13 feet subsiding
to 5 to 8 feet. waves occasionally around 16 feet.
.sunday...west winds 15 to 25 knots becoming northwest. lake
effect snow showers during the day, then a chance of snow showers
sunday night. waves 5 to 8 feet subsiding to 3 to 6 feet. waves
occasionally around 10 feet.
.monday...northwest winds 15 to 25 knots becoming west to
30 knots. a chance of snow showers during the day, then snow
showers monday night. waves 2 to 4 feet building to 8 to 11 feet.
waves occasionally around 14 feet.
.tuesday...west winds 15 to 25 knots becoming south. snow showers
likely during the day. waves 7 to 10 feet subsiding to 3 to
6 feet. waves occasionally around 13 feet.
$$
(3/4)
Latest Great Lakes Marine Forecast by KBUF
Issued 12/11/2025 4:02 PM America/New_York.
Valid through 12/11/2025 11:00 PM America/New_York.
fzus61 kbuf 112102
glfsl
expires:202512120400;;410359
forecast for the saint lawrence river
including the thousand islands region
national weather service buffalo ny
402 pm est thu dec 11 2025
slz022-120400-
saint lawrence river from cape vincent to ogdensburg-
402 pm est thu dec 11 2025
.tonight...west winds 5 to 15 knots. mostly cloudy through the
early overnight, then becoming partly cloudy.
.friday...west winds 5 to 10 knots becoming southwest. mostly
sunny.
.friday night...west winds 10 knots or less becoming south. snow
showers likely overnight.
.saturday...south winds 5 to 15 knots becoming southwest. lake
effect snow showers.
.saturday night...southwest winds 5 to 15 knots. lake effect snow
showers.
.sunday...west winds 5 to 10 knots becoming northwest. snow
showers likely during the day.
.monday...west winds 5 to 15 knots becoming southwest. a chance
of snow showers during the day, then snow showers likely monday
night.
.tuesday...southwest winds 5 to 15 knots becoming south 15 to
20 knots. snow showers likely during the day.
$$
(4/4)
Latest Great Lakes Marine Forecast by KBUF
Issued 12/11/2025 4:02 PM America/New_York.
Valid through 12/11/2025 11:00 PM America/New_York.
fzus61 kbuf 112102
glfsl
expires:202512120400;;410360
forecast for the saint lawrence river
including the thousand islands region
national weather service buffalo ny
402 pm est thu dec 11 2025
slz024-120400-
saint lawrence river from ogdensburg to saint regis-
402 pm est thu dec 11 2025
.tonight...west winds 15 to 20 knots diminishing to 10 to
15 knots. a chance of snow showers early.
.friday...southwest winds 5 to 15 knots. partly sunny.
.friday night...southwest winds 10 knots or less becoming south.
partly to mostly cloudy.
.saturday...south winds 10 knots or less becoming southwest 10 to
15 knots. lake effect snow showers.
.saturday night...southwest winds 5 to 15 knots. lake effect snow
showers in the evening, then a chance of snow showers overnight.
.sunday...west winds 5 to 10 knots becoming northwest. a chance
of snow showers during the day.
.monday...west winds 5 to 15 knots becoming southwest. a chance
of snow showers during the day, then snow showers likely monday
night.
.tuesday...southwest winds 5 to 15 knots becoming south 15 to
20 knots. a chance of snow showers during the day.
$$
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