570
FZUS61 KBUF 070201
GLFLO

Open Lake Forecast for Lake Ontario
National Weather Service Buffalo NY
1001 PM EDT Tue May 6 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 broad 29.7 inch low will gradually drift north across
the eastern end of the lake through tonight, then weaken as it moves
across the lower Saint Lawrence Valley Wednesday. A cold front will
cross the lower Great Lakes Wednesday night, with a 30.4 inch high
over James Bay building across Lake Ontario Thursday and Friday. The
high will weaken as it slides southward into the lower Ohio Valley
Saturday.

LOZ062-070900-
Lake Ontario open waters from the Niagara River to Hamlin Beach-
1001 PM EDT Tue May 6 2025

.OVERNIGHT...Southwest winds 5 to 15 knots becoming west
15 to 20 knots. Showers with a chance of thunderstorms, then
showers late. Waves 1 to 2 feet.
.WEDNESDAY...West winds 15 to 20 knots diminishing to 10 to
15 knots. Showers likely early, then a chance of showers late in
the morning. Waves 1 to 3 feet.
.WEDNESDAY NIGHT...West winds 10 to 15 knots becoming north.
Waves 1 to 3 feet.
.THURSDAY...North winds 5 to 15 knots becoming west. Waves 2 feet
or less.
.THURSDAY NIGHT...Northwest winds 5 to 10 knots becoming north.
Waves 2 feet or less.
.FRIDAY...North winds around 10 knots becoming northwest. Waves
2 feet or less.
.SATURDAY...West winds around 10 knots becoming north. Waves 1 to
2 feet.
.SUNDAY...Northeast winds 5 to 10 knots becoming southwest. Waves
2 feet or less.

Winds and waves higher in and near thunderstorms.

$$

LOZ063>065-070900-
Lake Ontario open waters from Hamlin Beach to the Saint Lawrence
River-
1001 PM EDT Tue May 6 2025

.OVERNIGHT...Southwest winds 10 to 15 knots increasing to
15 to 20 knots. Showers with a chance of thunderstorms, then
showers late. Waves 1 to 3 feet.
.WEDNESDAY...West winds 15 to 20 knots diminishing to 10 to
15 knots. Showers in the morning, then a chance of showers in the
afternoon. Waves 2 to 4 feet.
.WEDNESDAY NIGHT...Northwest winds 5 to 15 knots becoming north.
A chance of showers. Waves 1 to 3 feet.
.THURSDAY...North winds 5 to 15 knots becoming northwest. Waves
1 to 3 feet.
.THURSDAY NIGHT...Northwest winds 5 to 15 knots becoming north.
Waves 2 feet or less.
.FRIDAY...North winds 10 to 15 knots becoming northwest. Waves
1 to 3 feet.
.SATURDAY...West winds 10 to 15 knots becoming north. Waves 1 to
3 feet.
.SUNDAY...North winds 5 to 15 knots becoming south. Waves 2 feet
or less.

Winds and waves higher in and near thunderstorms.

$$

LOZ061-070900-
MAFOR 0703/
ONTARIO WEST 1/2 11516 12626 11620 13610 11710. A chance of
thunderstorms late this evening. Waves 1 to 3 feet.

ONTARIO EAST 1/2 13526 11626 11620 11610 11710 11800. A chance of
thunderstorms overnight. Waves 1 to 3 feet overnight. Waves 2 to
4 feet Wednesday. Waves 1 to 3 feet Wednesday evening.

$$