846
FZUS61 KBUF 042001
GLFLO

Open Lake Forecast for Lake Ontario
National Weather Service Buffalo NY
401 PM EDT Wed Jun 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 cold front will cross the lower Great Lakes
tomorrow before stalling across Ohio and Pennsylvania Thursday
night. Several weak 29.6 inch waves of low pressure will then ripple
east along the stalled front Friday through Saturday, with the final
wave moving east across New England Saturday night. A weak 29.9 inch
surface high pressure over the Ohio Valley will ridge northward
across the eastern Great Lakes Sunday, while a 29.6 inch surface low
slowly rotates across the western and central Great Lakes into
Monday.

LOZ062-050300-
Lake Ontario open waters from the Niagara River to Hamlin Beach-
401 PM EDT Wed Jun 4 2025

.TONIGHT...Southwest winds 15 to 20 knots becoming west 5 to
15 knots. Waves 2 to 4 feet subsiding to 1 to 3 feet.
.THURSDAY...Northwest winds 5 to 10 knots. A chance of showers.
Waves 1 foot or less.
.THURSDAY NIGHT...West winds 10 knots or less becoming northwest.
Waves 1 foot or less.
.FRIDAY...North winds 10 knots or less becoming northeast. Waves
1 foot or less.
.FRIDAY NIGHT...Northeast winds 5 to 10 knots becoming north. A
chance of showers overnight. Waves 1 foot or less.
.SATURDAY...Northwest winds 5 to 10 knots becoming north. A
chance of showers during the day. Waves around 1 foot.
.SUNDAY...Northeast winds 10 to 15 knots becoming south. A chance
of showers Sunday night. Waves 1 to 2 feet.
.MONDAY...Southwest winds 10 to 15 knots. Showers likely during
the day, then a chance of showers Monday night. Waves 1 to
3 feet.

$$

LOZ063>065-050300-
Lake Ontario open waters from Hamlin Beach to the Saint Lawrence
River-
401 PM EDT Wed Jun 4 2025

.TONIGHT...South winds 5 to 10 knots becoming southwest. Waves
2 feet or less.
.THURSDAY...West winds 5 to 10 knots becoming northwest. A chance
of showers in the afternoon. Waves 1 foot or less.
.THURSDAY NIGHT...West winds less than 10 knots becoming
northwest. A chance of showers. Waves 1 foot or less.
.FRIDAY...North winds 10 knots or less. A chance of showers.
Waves 1 foot or less.
.FRIDAY NIGHT...North winds 5 to 10 knots. A chance of showers.
Waves 1 foot or less.
.SATURDAY...North winds 5 to 10 knots. A chance of showers during
the day. Waves 2 feet or less.
.SUNDAY...Northeast winds 10 to 15 knots becoming south. A chance
of showers Sunday night. Waves 2 feet or less.
.MONDAY...South winds 10 to 15 knots. Showers likely. Waves 1 to
3 feet.

$$

LOZ061-050300-
MAFOR 0421/
ONTARIO WEST 1/2 11520 11510 14600 12700. A chance of showers
Thursday afternoon. Waves 2 to 4 feet subsiding to 1 to 3 feet
tonight. Waves 1 foot or less Thursday.

ONTARIO EAST 1/2 12400 13500 12600 11700. A chance of showers
Thursday afternoon. Waves 1 foot or less.

$$