Heavy Snow in the Central/Southern Rockies; Below Average Temperatures in the Central and Eastern US

Moderate to heavy snowfall is expected in the central/southern Rockies and adjacent High Plains today. Lake-enhanced snowfall is expected downwind of the Great Lakes today. Showers and thunderstorms will be possible this evening into tonight across the western Gulf Coast states. Temperatures across much of the central and eastern CONUS will remain below average and chilly to end the week. Read More >

NZUS99 KBUF 031452
GLFLOT

Experimental Tabular Open Lake Forecast for Lake Ontario
National Weather Service Buffalo NY
952 AM EST Wed Dec 3 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 later today into 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.

LOZ062-032100-
Lake Ontario open waters from the Niagara River to Hamlin Beach-
952 AM EST Wed Dec 3 2025

.This Afternoon...
Weather.............Cloudy.
Sfc winds...........Southwest 15 to 20 knots increasing to 30 knots
                              in the afternoon.
100-ft winds........Southwest 20 to 25 knots increasing to 35 knot
                              gales in the afternoon.
Sig waves...........4 to 6 feet building to 8 to 12 feet in the
                              afternoon.
Ocnl waves..........Around 7 feet building to around 13 feet in the
                              afternoon.

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

.THURSDAY...
Weather.............Mostly cloudy with chance of snow showers.
Sfc winds...........West gales to 35 knots becoming northwest to 30
                              knots in the afternoon.
100-ft winds........West gales to 45 knots becoming northwest at 35
                              knots in the afternoon.
Sig waves...........8 to 12 feet.
Ocnl waves..........Around 15 feet.

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

.FORECAST DAYS 3 THROUGH 5......
.FRIDAY...South winds 15 to 20 knots. Waves 4 to 6 feet.
.SATURDAY...Chance of snow showers. Southwest winds 15 to
20 knots. Waves 4 to 6 feet.
.SUNDAY...Chance of snow showers. chance of snow showers after
midnight. Northwest winds 10 to 15 knots. Waves 2 to 4 feet.

$$

LOZ063-032100-
Lake Ontario open waters from Hamlin Beach to Sodus Bay-
952 AM EST Wed Dec 3 2025

.This Afternoon...
Weather.............Mostly cloudy.
Sfc winds...........Southwest 20 to 25 knots.
100-ft winds........Southwest to 30 knots.
Sig waves...........2 to 4 feet building to 5 to 7 feet in the
                              afternoon.
Ocnl waves..........Around 5 feet building to around 9 feet in the
                              afternoon.

.TONIGHT...
Weather.............Snow showers, then snow showers likely after
                              midnight.
Sfc winds...........Southwest to 30 knots.
100-ft winds........Southwest gales to 35 knots.
Sig waves...........8 to 12 feet.
Ocnl waves..........Around 14 feet.

.THURSDAY...
Weather.............Mostly cloudy with snow showers likely, then
                              mostly cloudy with chance of snow showers in
                              the afternoon.
Sfc winds...........Northwest gales to 35 knots.
100-ft winds........Northwest gales to 45 knots.
Sig waves...........12 to 16 feet.
Ocnl waves..........Around 19 feet.

.THURSDAY NIGHT...
Weather.............Partly cloudy.
Sfc winds...........Northwest 20 to 25 knots.
100-ft winds........West to 30 knots.
Sig waves...........8 to 12 feet subsiding to 4 to 6 feet after
                              midnight.
Ocnl waves..........Around 15 feet subsiding to around 8 feet after
                              midnight.

.FORECAST DAYS 3 THROUGH 5......
.FRIDAY...South winds 15 to 20 knots. Waves 3 to 5 feet.
.SATURDAY...Breezy. Chance of snow showers. Southwest winds 20 to
25 knots. Waves 5 to 7 feet.
.SUNDAY...Chance of snow showers. Northwest winds 10 to 15 knots.
Waves 3 to 5 feet.

$$

LOZ064-065-032100-
Lake Ontario open waters from Sodus Bay to Mexico Bay-
Lake Ontario open waters from Mexico Bay to the Saint Lawrence
River-
952 AM EST Wed Dec 3 2025

.This Afternoon...
Weather.............Mostly cloudy with scattered snow showers, then
                              cloudy in the afternoon.
Sfc winds...........South 10 to 15 knots increasing to southwest 20
                              to 25 knots in the afternoon.
100-ft winds........South 15 to 20 knots increasing to southwest to
                              30 knots in the afternoon.
Sig waves...........2 to 4 feet building to 6 to 9 feet in the
                              afternoon.
Ocnl waves..........Around 10 feet in the afternoon.

.TONIGHT...
Weather.............Cloudy with chance of snow showers, then snow
                              showers after midnight.
Sfc winds...........Southwest to 30 knots.
100-ft winds........Southwest gales to 35 knots.
Sig waves...........8 to 12 feet.
Ocnl waves..........Around 15 feet.

.THURSDAY...
Weather.............Mostly cloudy with snow showers likely, then
                              partly sunny with chance of snow showers in the
                              afternoon.
Sfc winds...........Northwest gales to 35 knots.
100-ft winds........Northwest gales to 45 knots.
Sig waves...........12 to 16 feet.
Ocnl waves..........Around 19 feet.

.THURSDAY NIGHT...
Weather.............Partly cloudy.
Sfc winds...........Northwest to 30 knots decreasing to 15 to 20
                              knots after midnight.
100-ft winds........Northwest gales to 35 knots decreasing to 20 to
                              25 knots after midnight.
Sig waves...........10 to 14 feet subsiding to 4 to 6 feet after
                              midnight.
Ocnl waves..........Around 16 feet subsiding to around 8 feet after
                              midnight.

.FORECAST DAYS 3 THROUGH 5......
.FRIDAY...Breezy. Chance of snow showers after midnight. South
winds 20 to 25 knots. Waves 5 to 7 feet.
.SATURDAY...Breezy. Snow showers likely. chance of snow showers.
South winds 20 to 25 knots. Waves 5 to 7 feet.
.SUNDAY...Chance of snow showers. Northwest winds 10 to 15 knots.
Waves 3 to 5 feet.

$$

LOZ061-032100-
MAFOR 0316/
ONTARIO WEST 1/2 13530 11537 12637 12640. Waves 2 to 4 feet
building to 5 to 8 feet this afternoon. Waves 6 to 10 feet
tonight. Waves 7 to 11 feet Thursday morning.

ONTARIO EAST 1/2 11520 12530 12547 11637 11647 11747. Waves 1 to
3 feet building to 3 to 6 feet this afternoon. Waves 5 to 9 feet
building to 7 to 11 feet tonight. Waves 8 to 12 feet Thursday
morning.

$$