(1/4)
Latest Great Lakes Marine Forecast by KBUF
Issued 12/17/2025 10:03 AM America/New_York.
Valid through 12/17/2025 5:00 PM America/New_York.
fzus61 kbuf 171503
glflo
expires:202512172200;;742045
open lake forecast for lake ontario
national weather service buffalo ny
1002 am est wed dec 17 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 29.0 inch low over northern ontario will move to
northern quebec by wednesday morning, with its trailing cold front
crossing the lake during wednesday. a 29.1 inch low near lake
superior thursday will deepen to 28.9 inches while moving to central
quebec by friday, with its trailing strong cold front crossing the
lake early friday morning. in its wake, a 30.1 inch high will slowly
build across the lake friday night and early saturday, then will
drift off the atlantic coastline later saturday and saturday night,
with a 29.5 inch low moving across ontario and quebec and pushing
its attendant cold front across the lake sunday. a large 30.6 inch
high will then build east across the lake monday.
loz063-172200-
lake ontario open waters from hamlin beach to sodus bay-
1002 am est wed dec 17 2025
...gale warning in effect until 4 pm est...
.this afternoon...west gales to 35 knots diminishing to 30 knots.
waves 11 to 16 feet. waves occasionally around 20 feet.
.tonight...west winds 15 to 25 knots becoming south 15 to
20 knots. waves 7 to 10 feet subsiding to 1 to 3 feet. waves
occasionally around 13 feet.
.thursday...south winds 15 to 25 knots increasing to 30 knots.
waves 2 to 4 feet building to 4 to 7 feet. waves occasionally
around 9 feet.
.thursday night...south winds to 30 knots. showers. waves 5 to
8 feet. waves occasionally around 10 feet.
.friday...southwest gales to 40 knots becoming west and
diminishing to 30 knots. snow and rain showers during the day,
then snow showers friday night. waves 10 to 14 feet building to
15 to 20 feet, then subsiding to 10 to 13 feet. waves
occasionally around 26 feet.
.saturday...west winds 10 to 15 knots becoming southwest and
increasing to 30 knots. a chance of rain and snow showers. waves
3 to 6 feet building to 7 to 10 feet. waves occasionally around
13 feet.
.sunday...west gales to 35 knots becoming northwest and
diminishing to 15 to 20 knots. a chance of snow showers during
the day. waves 10 to 13 feet subsiding to 3 to 6 feet. waves
occasionally around 16 feet.
$$
(2/4)
Latest Great Lakes Marine Forecast by KBUF
Issued 12/17/2025 10:03 AM America/New_York.
Valid through 12/17/2025 5:00 PM America/New_York.
fzus61 kbuf 171503
glflo
expires:202512172200;;742046
open lake forecast for lake ontario
national weather service buffalo ny
1002 am est wed dec 17 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 29.0 inch low over northern ontario will move to
northern quebec by wednesday morning, with its trailing cold front
crossing the lake during wednesday. a 29.1 inch low near lake
superior thursday will deepen to 28.9 inches while moving to central
quebec by friday, with its trailing strong cold front crossing the
lake early friday morning. in its wake, a 30.1 inch high will slowly
build across the lake friday night and early saturday, then will
drift off the atlantic coastline later saturday and saturday night,
with a 29.5 inch low moving across ontario and quebec and pushing
its attendant cold front across the lake sunday. a large 30.6 inch
high will then build east across the lake monday.
loz064-065-172200-
lake ontario open waters from sodus bay to the saint lawrence
river-
1002 am est wed dec 17 2025
...gale warning in effect until 4 pm est...
.this afternoon...southwest gales to 35 knots becoming west and
diminishing to 30 knots. a chance of rain showers.
waves 11 to 16 feet. waves occasionally around 20 feet.
.tonight...west winds 15 to 25 knots becoming south 15 to
20 knots. waves 8 to 11 feet subsiding to 2 to 4 feet. waves
occasionally around 14 feet.
.thursday...south winds 15 to 25 knots increasing to 30 knots.
waves 3 to 6 feet building to 6 to 9 feet. waves occasionally
around 11 feet.
.thursday night...south winds to 30 knots. showers. waves 6 to
10 feet. waves occasionally around 13 feet.
.friday...west gales to 45 knots diminishing to 30 knots. lake
effect rain and snow showers during the day, then lake effect
snow showers friday night. waves 10 to 14 feet building to 16 to
21 feet, then subsiding to 10 to 14 feet. waves occasionally
around 27 feet.
.saturday...west winds 15 to 25 knots becoming southwest to
30 knots. a chance of snow and rain showers during the day, then
rain showers likely with a chance of snow showers saturday night.
waves 3 to 6 feet building to 7 to 10 feet. waves occasionally
around 13 feet.
.sunday...west winds to 30 knots becoming northwest and
diminishing to 15 to 20 knots. a chance of snow and rain showers
during the day. waves 10 to 13 feet subsiding to 4 to 7 feet.
waves occasionally around 16 feet.
$$
(3/4)
Latest Great Lakes Marine Forecast by KBUF
Issued 12/17/2025 10:03 AM America/New_York.
Valid through 12/17/2025 5:00 PM America/New_York.
fzus61 kbuf 171503
glfsl
expires:202512172200;;742026
forecast for the saint lawrence river
including the thousand islands region
national weather service buffalo ny
1002 am est wed dec 17 2025
slz022-172200-
saint lawrence river from cape vincent to ogdensburg-
1002 am est wed dec 17 2025
.rest of today...southwest winds 15 to 20 knots becoming west. a
chance of rain showers.
.tonight...west winds 5 to 15 knots becoming south 10 knots or
less. mostly cloudy.
.thursday...south winds 5 to 15 knots increasing to 15 to
20 knots. partly sunny.
.thursday night...south winds 15 to 25 knots. showers.
.friday...southwest winds 15 to 25 knots becoming west. lake
effect rain and snow showers during the day, then snow showers
likely friday night.
.saturday...southwest winds 5 to 15 knots. a chance of snow
showers during the day, then snow showers, rain showers likely
with a chance of freezing rain saturday night.
.sunday...southwest winds 5 to 15 knots becoming northwest. a
chance of snow showers and freezing rain during the day.
$$
(4/4)
Latest Great Lakes Marine Forecast by KBUF
Issued 12/17/2025 10:03 AM America/New_York.
Valid through 12/17/2025 5:00 PM America/New_York.
fzus61 kbuf 171503
glfsl
expires:202512172200;;742027
forecast for the saint lawrence river
including the thousand islands region
national weather service buffalo ny
1002 am est wed dec 17 2025
slz024-172200-
saint lawrence river from ogdensburg to saint regis-
1002 am est wed dec 17 2025
.rest of today...southwest winds 15 to 20 knots becoming west. a
chance of rain and snow showers late this morning, then a chance
of rain showers early this afternoon. a chance of rain and snow
showers late.
.tonight...west winds 15 to 20 knots becoming south 5 to
15 knots. partly cloudy.
.thursday...south winds 5 to 15 knots increasing to 15 to
20 knots. partly sunny.
.thursday night...south winds 15 to 25 knots. a chance of showers
in the evening, then showers overnight.
.friday...southwest winds 15 to 25 knots becoming west. lake
effect rain showers with lake effect snow showers likely during
the day, then snow showers likely friday night.
.saturday...west winds 5 to 15 knots becoming southwest 15 to
20 knots. a chance of snow showers during the day, then snow
showers likely saturday night.
.sunday...southwest winds 15 to 20 knots becoming west 5 to
15 knots. snow showers likely during the day.
$$
|
