Experimental Modernized Open Lake Forecast - Lake Ontario

NZUS99 KBUF 210852
GLFLOT

Experimental Tabular Open Lake Forecast for Lake Ontario
National Weather Service Buffalo NY
452 AM EDT Thu May 21 2026

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 large 30.4 inch area of surface high pressure will
build across the entire Great Lakes region through tonight, before
sliding east off the New England coast late Friday. This surface
high will then strengthen to 30.6 inches as it anchors over Atlantic
Canada through Sunday. A 29.9 inch low and attendant warm front will
then slowly approach the Lake late Friday night and Saturday, before
weakening and sliding eastward Sunday. A 30.1 inch high will settle
across the region Monday through Tuesday.

LOZ062-211400-
Lake Ontario open waters from the Niagara River to Hamlin Beach-
452 AM EDT Thu May 21 2026

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

.TONIGHT...
Weather.............Partly cloudy.
Sfc winds...........Light and variable winds becoming northeast 5
                              to 10 knots after midnight.
100-ft winds........Light and variable winds becoming northeast 10
                              to 15 knots after midnight.
Sig waves...........1 to 3 feet.

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

.FRIDAY NIGHT...
Weather.............Cloudy, then chance of showers after midnight.
Sfc winds...........East 15 to 20 knots.
100-ft winds........East 20 to 25 knots.
Sig waves...........3 to 5 feet.
Ocnl waves..........Around 6 feet.


.FORECAST DAYS 3 THROUGH 5......
.SATURDAY...Breezy, showers. showers likely after midnight. East
winds 20 to 25 knots. Waves 6 to 9 feet.
.SUNDAY...Showers likely in the morning, then chance of showers.
Southeast winds 5 to 10 knots. Waves 3 to 5 feet.
.MONDAY...Chance of showers in the morning. Light and variable
winds. Waves 2 feet or less.

$$

LOZ063>065-211400-
Lake Ontario open waters from Hamlin Beach to Sodus Bay-
Lake Ontario open waters from Sodus Bay to Mexico Bay-
Lake Ontario open waters from Mexico Bay to the Saint Lawrence
River-
452 AM EDT Thu May 21 2026

.Today...
Weather.............Mostly sunny.
Sfc winds...........Northeast 10 to 15 knots.
100-ft winds........Northeast 15 to 20 knots.
Sig waves...........5 to 7 feet subsiding to 2 to 4 feet in the
                              afternoon.
Ocnl waves..........Around 9 feet in the morning.

.TONIGHT...
Weather.............Mostly clear.
Sfc winds...........North 5 to 10 knots.
100-ft winds........Northeast 10 to 15 knots.
Sig waves...........1 to 3 feet.

.FRIDAY...
Weather.............Mostly sunny.
Sfc winds...........Northeast 10 to 15 knots.
100-ft winds........Northeast 15 to 20 knots.
Sig waves...........2 to 4 feet.

.FRIDAY NIGHT...
Weather.............Mostly cloudy.
Sfc winds...........Northeast 10 to 15 knots.
100-ft winds........Northeast 15 to 20 knots.
Sig waves...........2 to 4 feet.
Ocnl waves..........Around 5 feet.


.FORECAST DAYS 3 THROUGH 5......
.SATURDAY...Breezy. Showers likely in the morning, then showers.
East winds 20 to 25 knots. Waves 4 to 6 feet.
.SUNDAY...Showers likely in the morning, then chance of showers.
Southeast winds 15 to 20 knots. Waves 4 to 6 feet.
.MONDAY...Chance of showers. Light and variable winds. Waves 1 to
3 feet.

$$

LOZ061-211400-
MAFOR 2109/
ONTARIO WEST 1/2 11120 11110 11210 12200 13100. Waves 2 to 4 feet
subsiding to 1 to 3 feet today. Waves 1 foot or less tonight.

ONTARIO EAST 1/2 11130 11110 12100 12800 12100. Waves 3 to 6 feet
subsiding to 1 to 3 feet today. Waves 1 foot or less tonight.

$$

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

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