366
FZUS61 KBUF 200801
GLFLO

Open Lake Forecast for Lake Ontario
National Weather Service Buffalo NY
401 AM EDT Sun Apr 20 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 30.4 inch high will build across the lower Great Lakes
this afternoon before drifting east to 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. A general area of high pressure
averaging 30.3 inches will then build from the upper Great Lakes
Tuesday to the lower Great Lakes and western Quebec Wednesday before
settling into New England Thursday.

LOZ062-201500-
Lake Ontario open waters from the Niagara River to Hamlin Beach-
401 AM EDT Sun Apr 20 2025

.TODAY...Northwest winds 5 to 15 knots becoming south. Waves 1 to
3 feet subsiding to 1 foot or less.
.TONIGHT...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. Waves 3 to 5 feet.
.MONDAY NIGHT...South winds 15 to 20 knots becoming southwest.
Showers in the evening, then a chance of showers overnight. Waves
3 to 5 feet.
.TUESDAY...West winds 15 to 20 knots 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
1 foot or less.
.THURSDAY...East winds 5 to 10 knots. A chance of showers
Thursday night. Waves 2 feet or less.

$$

LOZ063>065-201500-
Lake Ontario open waters from Hamlin Beach to the Saint Lawrence
River-
401 AM EDT Sun Apr 20 2025

.TODAY...Northwest winds 15 to 20 knots becoming west 5 to
15 knots. Waves 3 to 5 feet subsiding to 1 to 3 feet.
.TONIGHT...Southwest winds 10 knots or less becoming east 10 to
15 knots. Waves 2 feet or less.
.MONDAY...East winds 15 to 20 knots becoming southeast. Rain
showers likely in the morning, then rain showers in the
afternoon. Waves 1 to 3 feet building to 2 to 4 feet.
.MONDAY NIGHT...Southeast winds 15 to 20 knots becoming
southwest. Showers in the evening, then showers likely overnight.
Waves 3 to 5 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
2 feet or less.
.THURSDAY...Southeast winds 5 to 10 knots. Waves 1 foot or less.

$$

LOZ061-201500-
MAFOR 2009/
ONTARIO WEST 1/2 12710 11700 11500 11400 11200 11210 11220. Waves
2 to 4 feet subsiding to 1 foot or less today. Waves 1 to 3 feet
tonight.

ONTARIO EAST 1/2 11720 12710 11600 11500 11400 11300 11210. Waves
3 to 5 feet subsiding to 1 to 3 feet today. Waves 1 foot or less
tonight.

$$