483
FZUS61 KBUF 040842
GLFLO

Open Lake Forecast for Lake Ontario
National Weather Service Buffalo NY
442 AM EDT Fri Apr 4 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 30.2 inch high over the SOO this morning will drift
JUST to the north of the lake this afternoon. The high will exit
across the Saint Lawrence valley tonight...while a 29.8 inch low
will approach from the Ohio valley. This area of low pressure will
track across New York state on Saturday. A second 29.8 inch low
will move to the northeast across Pennsylvania Saturday night and
Sunday. A 30.1 inch high over the Upper mid west late Sunday will
build across the lake Sunday night. A frontal boundary will cross
the Lower Great Lakes on Monday. High pressure will build over the
entire Great Lakes Monday night and Tuesday.

LOZ062-041515-
Lake Ontario open waters from the Niagara River to Hamlin Beach-
442 AM EDT Fri Apr 4 2025

.TODAY...Northwest winds 10 to 15 knots becoming southwest less
than 10 knots. Waves 2 feet or less.
.TONIGHT...Southeast winds 10 knots or less becoming east and
increasing to 15 to 20 knots after midnight. Widespread rain
late. Waves 1 to 3 feet.
.SATURDAY...East winds 15 to 25 knots becoming southwest and
diminishing to 10 to 15 knots. Occasional rain. Waves 3 to 5 feet
subsiding to 1 to 3 feet.
.SATURDAY NIGHT...West winds 10 to 15 knots becoming northwest
15 to 20 knots. Occasional rain in the evening, then showers
likely overnight. Waves 2 to 3 feet.
.SUNDAY...Northwest winds 15 to 20 knots. A chance of rain
showers. Waves 2 to 4 feet.
.MONDAY...West winds 10 to 15 knots becoming northwest and
increasing to 15 to 25 knots. A chance of rain and snow showers.
Waves building to 3 to 6 feet.
.TUESDAY...Northwest winds 15 to 25 knots. A chance of snow
showers. Waves 4 to 7 feet. Waves occasionally around 9 feet.

$$

LOZ063>065-041515-
Lake Ontario open waters from Hamlin Beach to the Saint Lawrence
River-
442 AM EDT Fri Apr 4 2025

.TODAY...West winds 10 to 15 knots. Waves 1 to 3 feet.
.TONIGHT...Southwest winds 10 knots or less becoming east 10 to
15 knots. Rain likely towards morning. Waves 2 feet or less.
.SATURDAY...East winds 15 to 25 knots becoming south. Occasional
rain. Waves building to 3 to 6 feet.
.SATURDAY NIGHT...Southwest winds 15 to 25 knots becoming west.
Occasional rain in the evening, then showers likely overnight.
Waves 3 to 6 feet.
.SUNDAY...West winds 15 to 20 knots becoming northwest. Rain
showers likely. Waves 3 to 5 feet.
.MONDAY...West winds 10 to 15 knots increasing to 15 to 25 knots.
A chance of rain and snow showers. Waves building to 5 to 8 feet.
Waves occasionally around 10 feet.
.TUESDAY...Northwest winds 15 to 25 knots. A chance of snow
showers. Waves 5 to 9 feet. Waves occasionally around 11 feet.

$$

LOZ061-041515-
MAFOR 0409/
ONTARIO WEST 1/2 11600 11710 11700 11600 11400 11300 11200 11216.
Waves 2 feet or less today. Waves 1 foot or less building to 1 to
3 feet tonight.

ONTARIO EAST 1/2 11610 11710 13600 11400 12200. A chance of rain
showers overnight. Waves 1 to 3 feet today. Waves 1 foot or less
tonight.

$$

EAJ/RSH