235
FZUS61 KBUF 100201
GLFLO

Open Lake Forecast for Lake Ontario
National Weather Service Buffalo NY
1001 PM EDT Wed Apr 9 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 30.3 inch high will drift off the eastern seaboard
tonight. A compact 29.7 inch low over the Upper Midwest tonight will
slowly fill to 30.0 inches by Thursday night as it tracks just south
of the Lake. This low will then move to near the Delmarva by late
Friday with additional waves of low pressure then tracking northward
along a stalled frontal boundary along or just offshore of the Mid
Atlantic coast Saturday and Sunday. A weak ridge of high pressure
averaging 30.1 inches will build into the lower Great Lakes by late
Sunday.

LOZ062-100900-
Lake Ontario open waters from the Niagara River to Hamlin Beach-
1001 PM EDT Wed Apr 9 2025

.OVERNIGHT...South winds 5 to 10 knots becoming southeast.
Waves 2 feet or less.
.THURSDAY...East winds 10 to 15 knots increasing to 15 to
25 knots. Rain in the afternoon. Waves 2 feet or less building to
4 to 7 feet. Waves occasionally around 9 feet.
.THURSDAY NIGHT...East winds 15 to 20 knots diminishing to 10 to
15 knots. Rain. Waves 4 to 7 feet subsiding to 2 to 4 feet. Waves
occasionally around 9 feet.
.FRIDAY...East winds 15 to 20 knots becoming northeast. A chance
of rain showers. Waves 2 to 3 feet.
.FRIDAY NIGHT...Northeast winds 10 to 15 knots. A chance of rain
showers. Waves 2 to 3 feet.
.SATURDAY...Northeast winds 5 to 15 knots becoming north. A
chance of rain showers. Waves 1 to 2 feet.
.SUNDAY...North winds 10 knots or less becoming southwest. Waves
1 foot or less.
.MONDAY...South winds 5 to 15 knots becoming southwest 15 to
20 knots. A chance of showers Monday night. Waves 1 to 3 feet.

$$

LOZ063>065-100900-
Lake Ontario open waters from Hamlin Beach to the Saint Lawrence
River-
1001 PM EDT Wed Apr 9 2025

.OVERNIGHT...South winds 5 to 10 knots becoming southeast.
Waves 2 feet or less.
.THURSDAY...Southeast winds 10 to 15 knots becoming east 15 to
20 knots. Rain in the afternoon. Waves 1 foot or less building to
3 to 5 feet.
.THURSDAY NIGHT...East winds 15 to 20 knots becoming southeast
10 to 15 knots. Rain. Waves 3 to 5 feet subsiding to 1 to 3 feet.
.FRIDAY...Southeast winds 15 to 20 knots becoming east 5 to
15 knots. Rain showers likely in the morning, then a chance of
rain showers in the afternoon. Waves 1 to 3 feet.
.FRIDAY NIGHT...East winds 5 to 15 knots becoming northeast. A
chance of rain showers. Waves 1 to 3 feet.
.SATURDAY...Northeast winds 5 to 10 knots becoming north. A
chance of rain showers. Waves 2 feet or less.
.SUNDAY...North winds 5 to 10 knots becoming west. Waves 1 foot
or less.
.MONDAY...South winds 5 to 15 knots becoming southwest 15 to
20 knots. A chance of showers Monday night. Waves 2 feet or less
building to 2 to 4 feet.

$$

LOZ061-100900-
MAFOR 1003/
ONTARIO WEST 1/2 11400 11300 11200 12220 12236 11226. Waves 2
feet or less overnight. Waves 2 feet or less building to 4 to 7
feet, and occasionally around 9 feet Thursday. Waves 4 to 7 feet
subsiding to 3 to 6 feet, and occasionally around 9 feet Thursday
evening.

ONTARIO EAST 1/2 11400 12300 11210 11220 13226. Waves 2 feet or
less overnight. Waves 1 foot or less building to 2 to 4 feet
Thursday. Waves 2 to 4 feet subsiding to 1 to 3 feet Thursday
evening.

$$