919
FZUS61 KBUF 200201
GLFLO

Open Lake Forecast for Lake Ontario
National Weather Service Buffalo NY
1001 PM EDT Sat Apr 19 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 29.6 inch low over southern Quebec will move east to
near the Gulf of Saint Lawrence by Sunday morning, with a trailing
cold front crossing the lake this evening. A 30.4 inch high will
build across the upper Great Lakes tonight before reaching the lower
Great Lakes Sunday afternoon, and New England Monday. A 29.5 inch
low is then forecast to move into the central Great Lakes Monday
before reaching Quebec Tuesday, with the trailing cold front
crossing the lake Monday night.

LOZ062-200900-
Lake Ontario open waters from the Niagara River to Hamlin Beach-
1001 PM EDT Sat Apr 19 2025

.OVERNIGHT...West winds 15 to 20 knots becoming northwest.
Waves 3 to 5 feet subsiding to 2 to 4 feet.
.SUNDAY...Northwest winds 5 to 15 knots becoming south less than
10 knots. Waves 1 to 3 feet subsiding to 1 foot or less.
.SUNDAY NIGHT...Southeast winds 5 to 15 knots becoming east 15 to
20 knots. Waves 1 to 3 feet.
.MONDAY...East winds 15 to 20 knots. Showers likely in the
morning, then showers with a chance of thunderstorms in the
afternoon. Waves 2 to 4 feet building to 3 to 5 feet.
.MONDAY NIGHT...Southeast winds 15 to 20 knots becoming
southwest. Showers with a chance of thunderstorms in the evening,
then a chance of showers overnight. Waves 3 to 5 feet.
.TUESDAY...Southwest winds 15 to 20 knots becoming west and
diminishing to 5 to 10 knots. Waves 3 to 6 feet subsiding to 1 to
3 feet.
.WEDNESDAY...Northwest winds 5 to 10 knots becoming east. Waves
2 feet or less.
.THURSDAY...East winds 5 to 10 knots. Waves 2 feet or less.

Winds and waves higher in and near thunderstorms.

$$

LOZ063>065-200900-
Lake Ontario open waters from Hamlin Beach to the Saint Lawrence
River-
1001 PM EDT Sat Apr 19 2025

.OVERNIGHT...West winds 15 to 20 knots becoming northwest.
Waves 3 to 6 feet.
.SUNDAY...Northwest winds 15 to 20 knots becoming southwest 5 to
15 knots. Waves 3 to 5 feet subsiding to 1 to 3 feet.
.SUNDAY NIGHT...Southwest winds 5 to 15 knots becoming east.
Waves 2 feet or less.
.MONDAY...East winds 15 to 20 knots becoming southeast. A chance
of rain showers in the morning, then rain showers likely in the
afternoon. Waves 1 to 3 feet building to 2 to 4 feet.
.MONDAY NIGHT...Southeast winds 15 to 25 knots becoming
southwest. Showers likely with a chance of thunderstorms in the
evening, then showers likely overnight. Waves 3 to 6 feet.
.TUESDAY...Southwest winds 15 to 25 knots becoming west and
diminishing to 10 to 15 knots. Waves 3 to 6 feet building to 4 to
7 feet, then subsiding to 2 to 4 feet. Waves occasionally around
9 feet.
.WEDNESDAY...West winds 5 to 10 knots becoming southeast. Waves
1 to 3 feet subsiding to 1 foot or less.
.THURSDAY...Southeast winds 5 to 10 knots becoming east. Waves
1 foot or less.

Winds and waves higher in and near thunderstorms.

$$

LOZ061-200900-
MAFOR 2003/
ONTARIO WEST 1/2 11620 11720 11710 12700 11500 11400 11300. Waves
3 to 5 feet subsiding to 2 to 4 feet overnight. Waves 2 to 4 feet
subsiding to 1 foot or less Sunday. Waves 1 foot or less Sunday
evening.

ONTARIO EAST 1/2 12620 11720 11710 11700 11600 11500 11400. Waves
3 to 6 feet overnight. Waves 3 to 5 feet subsiding to 1 to 3 feet
Sunday. Waves 1 foot or less Sunday evening.

$$