NZUS99 KBUF 062352
GLFLOT

Experimental Tabular Open Lake Forecast for Lake Ontario
National Weather Service Buffalo NY
652 PM EST Sat Dec 6 2025

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 cold front will cross the lake tonight, while its
associated 29.2 inch low remains stationary near Hudson Bay. A weak
30.0 inch surface low and trough will cross the lake on Sunday
afternoon and evening. Another 30.4 inch high will move across the
region Monday through Monday night, before moving off the east coast
Tuesday. A 29.5 inch low will move across the Upper Great Lakes
Tuesday, then a stronger low averaging 29.3 inches will approach the
region Tuesday night and potentially move northwest of the Lake
Wednesday. A 29.9 inch high is expected to move into the Great Lakes
region Thursday.

LOZ062-070900-
Lake Ontario open waters from the Niagara River to Hamlin Beach-
652 PM EST Sat Dec 6 2025

.Overnight...
Weather.............Mostly cloudy.
Sfc winds...........West 15 to 20 knots.
100-ft winds........Northwest 20 to 25 knots.
Sig waves...........6 to 9 feet subsiding to 3 to 5 feet after
                              midnight.
Ocnl waves..........Around 10 feet subsiding to around 6 feet after
                              midnight.

.SUNDAY...
Weather.............Snow showers likely, then snow showers in the
                              afternoon.
Sfc winds...........Northeast 5 to 10 knots becoming southeast 10
                              to 15 knots in the afternoon.
100-ft winds........Northeast 10 to 15 knots becoming southeast 15
                              to 20 knots in the afternoon.
Sig waves...........2 to 4 feet.

.SUNDAY NIGHT...
Weather.............Mostly cloudy.
Sfc winds...........North 15 to 20 knots.
100-ft winds........North 20 to 25 knots.
Sig waves...........3 to 5 feet.
Ocnl waves..........Around 6 feet.

.MONDAY...
Weather.............Mostly sunny.
Sfc winds...........North 15 to 20 knots decreasing to 5 to 10
                              knots in the afternoon.
100-ft winds........North 20 to 25 knots decreasing to 10 to 15
                              knots in the afternoon.
Sig waves...........3 to 5 feet subsiding to 2 to 4 feet in the
                              afternoon.
Ocnl waves..........Around 6 feet in the morning.

.MONDAY NIGHT...
Weather.............Mostly cloudy.
Sfc winds...........Southwest 5 to 10 knots becoming south 10 to 15
                              knots after midnight.
100-ft winds........Southwest 10 to 15 knots becoming south 15 to
                              20 knots after midnight.
Sig waves...........2 to 4 feet.


.FORECAST DAYS 3 THROUGH 5......
.TUESDAY...Breezy. Snow showers likely, then rain. South winds
20 to 25 knots. Waves 6 to 9 feet.
.WEDNESDAY...Breezy. Rain with a chance of snow, then rain and
snow showers likely in the evening. chance of snow showers after
midnight. South winds 20 to 25 knots. Waves 5 to 7 feet.
.THURSDAY...Chance of snow showers. Northwest winds 15 to
20 knots. Waves 4 to 6 feet.

$$

LOZ063-070900-
Lake Ontario open waters from Hamlin Beach to Sodus Bay-
652 PM EST Sat Dec 6 2025

.Overnight...
Weather.............Mostly cloudy with chance of snow showers, then
                              mostly cloudy after midnight.
Sfc winds...........West 20 to 25 knots becoming northwest 10 to 15
                              knots after midnight.
100-ft winds........West to 30 knots becoming northwest 15 to 20
                              knots after midnight.
Sig waves...........6 to 9 feet.
Ocnl waves..........Around 10 feet.

.SUNDAY...
Weather.............Cloudy with chance of snow showers, then cloudy
                              with snow showers in the afternoon.
Sfc winds...........Northeast 5 to 10 knots becoming east 10 to 15
                              knots in the afternoon.
100-ft winds........Northeast 10 to 15 knots becoming east 15 to 20
                              knots in the afternoon.
Sig waves...........2 to 4 feet.

.SUNDAY NIGHT...
Weather.............Mostly cloudy with chance of snow showers, then
                              partly cloudy after midnight.
Sfc winds...........North 20 to 25 knots.
100-ft winds........North to 30 knots.
Sig waves...........4 to 6 feet.
Ocnl waves..........Around 7 feet.

.MONDAY...
Weather.............Mostly sunny with chance of flurries, then
                              mostly sunny in the afternoon.
Sfc winds...........North 15 to 20 knots.
100-ft winds........North 20 to 25 knots.
Sig waves...........4 to 6 feet subsiding to 2 to 4 feet in the
                              afternoon.
Ocnl waves..........Around 7 feet subsiding to around 5 feet in the
                              afternoon.

.MONDAY NIGHT...
Weather.............Mostly cloudy.
Sfc winds...........West 10 to 15 knots becoming south after
                              midnight.
100-ft winds........West 15 to 20 knots becoming south after
                              midnight.
Sig waves...........2 to 4 feet.


.FORECAST DAYS 3 THROUGH 5......
.TUESDAY...Breezy. Snow showers likely in the afternoon. chance
of rain and snow in the evening, then rain likely after midnight.
South winds 20 to 25 knots. Waves 5 to 7 feet.
.WEDNESDAY...Breezy. Rain with a chance of snow, then rain and
snow showers likely in the evening. chance of snow showers and
showers after midnight. South winds 20 to 25 knots. Waves 6 to
9 feet.
.THURSDAY...Breezy. Chance of snow showers. West winds 20 to
25 knots. Waves 6 to 9 feet.

$$

LOZ064-065-070900-
Lake Ontario open waters from Sodus Bay to Mexico Bay-
Lake Ontario open waters from Mexico Bay to the Saint Lawrence
River-
652 PM EST Sat Dec 6 2025

.Overnight...
Weather.............Mostly cloudy with chance of snow showers, then
                              mostly cloudy after midnight.
Sfc winds...........West 20 to 25 knots.
100-ft winds........West to 30 knots becoming north 15 to 20 knots
                              after midnight.
Sig waves...........6 to 9 feet.
Ocnl waves..........Around 10 feet.

.SUNDAY...
Weather.............Mostly cloudy with chance of snow showers, then
                              cloudy with snow showers in the afternoon.
Sfc winds...........Northeast 10 to 15 knots.
100-ft winds........Northeast 15 to 20 knots.
Sig waves...........2 to 4 feet.

.SUNDAY NIGHT...
Weather.............Snow showers likely, then mostly cloudy after
                              midnight.
Sfc winds...........Northeast 15 to 20 knots becoming north 20 to
                              25 knots after midnight.
100-ft winds........Northeast 20 to 25 knots becoming north to 30
                              knots after midnight.
Sig waves...........4 to 6 feet.
Ocnl waves..........Around 7 feet.

.MONDAY...
Weather.............Mostly sunny with chance of flurries, then
                              mostly sunny in the afternoon.
Sfc winds...........North 15 to 20 knots.
100-ft winds........North 20 to 25 knots.
Sig waves...........4 to 6 feet subsiding to 2 to 4 feet in the
                              afternoon.
Ocnl waves..........Around 8 feet subsiding to around 5 feet in the
                              afternoon.

.MONDAY NIGHT...
Weather.............Mostly cloudy.
Sfc winds...........West 10 to 15 knots becoming southwest after
                              midnight.
100-ft winds........West 15 to 20 knots becoming southwest after
                              midnight.
Sig waves...........2 to 4 feet.
Ocnl waves..........Around 5 feet after midnight.


.FORECAST DAYS 3 THROUGH 5......
.TUESDAY...Windy. Snow showers likely, then rain and snow. South
winds to 30 knots. Waves 6 to 9 feet.
.WEDNESDAY...Windy. Rain with a chance of snow, then rain and
snow showers in the evening. rain and snow showers likely after
midnight. South winds to 30 knots. Waves 6 to 9 feet.
.THURSDAY...Breezy. Chance of snow showers. Northwest winds 20 to
25 knots. Waves 6 to 9 feet.

$$

LOZ061-070900-
MAFOR 0704/
ONTARIO WEST 1/2 11710 11810 11200 12307 11317 11827 11820. Waves
3 to 5 feet subsiding to 1 to 3 feet overnight. Waves 1 to 2 feet
Sunday. Waves 2 to 4 feet Sunday evening.

ONTARIO EAST 1/2 11720 11810 11110 11210 11207 11217 11117 11827.
Waves 3 to 6 feet subsiding to 2 to 4 feet overnight. Waves 1 to
3 feet Sunday. Waves 1 to 3 feet building to 2 to 4 feet Sunday
evening.

$$

Occasional waves will only be displayed when values meet or exceed 5 feet / 2 meters.

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