Snow Squalls in the Northeast U.S. on Thursday; Heavy Rain Along the Gulf Coast

An arctic cold front will move through the Great Lakes and Northeast on Thursday, bringing moderate to heavy snow, strong winds, and possible whiteout conditions through Thursday afternoon. A storm system interacting with Gulf moisture will bring moderate to heavy rainfall to the western and central Gulf Coast on Thursday. Isolated instances of flash flooding will be possible. Read More >

NZUS99 KBUF 040552
GLFLOT

Experimental Tabular Open Lake Forecast for Lake Ontario
National Weather Service Buffalo NY
1252 AM EST Thu Dec 4 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 30.2 inch surface high will build across the Ohio
Valley and Lower Great Lakes through Thursday morning before pushing
off the coast. A large 29.2 inch surface low near Hudson Bay will
push its cold front across the lake tonight, with another 30.4 inch
high building in its wake Thursday night. The high will then quickly
move east of the lake Friday. Another cold front will cross the Lake
late Saturday and Saturday night, this from a 29.3 inch low near
northern James Bay. Then, another area of surface high pressure
averaging 30.3 inches will build eastward across the Great Lakes
through Sunday, moving overhead Monday.

LOZ062-041500-
Lake Ontario open waters from the Niagara River to Hamlin Beach-
1252 AM EST Thu Dec 4 2025

.Today...
Weather.............Mostly cloudy with chance of snow showers.
Sfc winds...........Northwest to 30 knots.
100-ft winds........Northwest gales to 35 knots.
Sig waves...........8 to 12 feet.
Ocnl waves..........Around 14 feet.

.TONIGHT...
Weather.............Mostly cloudy.
Sfc winds...........Northwest 10 to 15 knots becoming southwest
                              after midnight.
100-ft winds........Northwest 15 to 20 knots becoming southwest
                              after midnight.
Sig waves...........5 to 7 feet subsiding to 2 to 4 feet after
                              midnight.
Ocnl waves..........Around 8 feet in the evening.

.FRIDAY...
Weather.............Partly sunny.
Sfc winds...........South 15 to 20 knots.
100-ft winds........Southwest 20 to 25 knots.
Sig waves...........3 to 5 feet.
Ocnl waves..........Around 6 feet.

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

.FORECAST DAYS 3 THROUGH 5......
.SATURDAY...Breezy. Chance of snow showers in the morning. chance
of showers. Southwest winds 20 to 25 knots. Waves 4 to 6 feet.
.SUNDAY...Chance of snow showers. Northwest winds 10 to 15 knots.
Waves 2 to 4 feet.
.MONDAY...North winds 10 to 15 knots. Waves 2 to 4 feet.

$$

LOZ063-041500-
Lake Ontario open waters from Hamlin Beach to Sodus Bay-
1252 AM EST Thu Dec 4 2025

.Today...
Weather.............Mostly cloudy with chance of snow showers.
Sfc winds...........Northwest gales to 35 knots.
100-ft winds........Northwest gales to 45 knots.
Sig waves...........10 to 14 feet.
Ocnl waves..........Around 17 feet.

.TONIGHT...
Weather.............Mostly cloudy.
Sfc winds...........Northwest 15 to 20 knots.
100-ft winds........Northwest 20 to 25 knots.
Sig waves...........8 to 12 feet subsiding to 3 to 5 feet after
                              midnight.
Ocnl waves..........Around 13 feet subsiding to around 5 feet after
                              midnight.

.FRIDAY...
Weather.............Partly sunny.
Sfc winds...........South 15 to 20 knots.
100-ft winds........South 20 to 25 knots.
Sig waves...........3 to 5 feet.
Ocnl waves..........Around 6 feet.

.FRIDAY NIGHT...
Weather.............Mostly cloudy.
Sfc winds...........South 15 to 20 knots.
100-ft winds........South 20 to 25 knots.
Sig waves...........2 to 4 feet.
Ocnl waves..........Around 5 feet.

.FORECAST DAYS 3 THROUGH 5......
.SATURDAY...Breezy. Chance of snow showers. chance of showers.
Southwest winds 20 to 25 knots. Waves 4 to 6 feet.
.SUNDAY...Chance of snow showers. Northwest winds 10 to 15 knots.
Waves 3 to 5 feet.
.MONDAY...North winds 10 to 15 knots. Waves 2 to 4 feet.

$$

LOZ064-065-041500-
Lake Ontario open waters from Sodus Bay to Mexico Bay-
Lake Ontario open waters from Mexico Bay to the Saint Lawrence
River-
1252 AM EST Thu Dec 4 2025

.Today...
Weather.............Mostly cloudy with chance of snow showers.
Sfc winds...........Northwest to 30 knots increasing to 35 knot
                              gales in the afternoon.
100-ft winds........Northwest gales to 35 knots increasing to 45
                              knots in the afternoon.
Sig waves...........10 to 14 feet.
Ocnl waves..........Around 17 feet.

.TONIGHT...
Weather.............Partly cloudy.
Sfc winds...........Northwest 20 to 25 knots decreasing to 5 to 10
                              knots after midnight.
100-ft winds........Northwest to 30 knots decreasing to 10 to 15
                              knots after midnight.
Sig waves...........8 to 12 feet subsiding to 3 to 5 feet after
                              midnight.
Ocnl waves..........Around 13 feet subsiding to around 6 feet after
                              midnight.

.FRIDAY...
Weather.............Partly sunny.
Sfc winds...........South 20 to 25 knots.
100-ft winds........South to 30 knots.
Sig waves...........4 to 6 feet.
Ocnl waves..........Around 8 feet.

.FRIDAY NIGHT...
Weather.............Mostly cloudy.
Sfc winds...........South 15 to 20 knots.
100-ft winds........South 20 to 25 knots.
Sig waves...........4 to 6 feet.
Ocnl waves..........Around 7 feet.

.FORECAST DAYS 3 THROUGH 5......
.SATURDAY...Breezy. Snow showers likely. showers likely in the
afternoon, then chance of rain and snow showers. South winds
20 to 25 knots. Waves 5 to 7 feet.
.SUNDAY...Snow showers likely, then chance of snow showers in the
evening. North winds 10 to 15 knots. Waves 3 to 5 feet.
.MONDAY...North winds 10 to 15 knots. Waves 3 to 5 feet.

$$

LOZ061-041500-
MAFOR 0410/
ONTARIO WEST 1/2 11730 12740 11730 11720 11710 11600 11500. A
chance of snow showers today. Waves 5 to 9 feet building to 6 to
10 feet today. Waves 3 to 6 feet subsiding to 1 to 3 feet
tonight.

ONTARIO EAST 1/2 11730 14740 11720 11700 11400. A chance of snow
showers today. Waves 6 to 9 feet building to 8 to 12 feet, then
subsiding to 7 to 10 feet today. Waves 6 to 9 feet subsiding to 2
feet or less tonight.

$$