National Weather Service Weather Forecast Office

• Home
• Site Map
• News
• Organization
• Search for: NWS All NOAA 

000
FZUS61 KBUF 182031
GLFLO

Open Lake Forecast for Lake Ontario
National Weather Service Buffalo NY
431 PM EDT Thu Apr 18 2024

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 30.1 inch surface high pressure will quickly cross the
lake tonight. A wavy frontal boundary will move across the Lake
tomorrow. A 29.4 inch low over northern Quebec Friday night will
continue to move away from the region on Saturday...while an
expansive 30.6 inch high will move from the Canadian Rockies to the
northern plains. The large high will continue to push south to the
Lower Mississippi valley by late Sunday. The high will be centered
over the Ohio valley on Monday. This high will slip to the east
Tuesday, while a 29.6 inch surface low deepens across the western
Great Lakes, with a warm front extending towards the Lake Tuesday
night.

LOZ062-190300-
Lake Ontario open waters from the Niagara River to Hamlin Beach-
431 PM EDT Thu Apr 18 2024

.TONIGHT...Southwest winds 10 knots or less becoming southeast.
Waves 2 feet or less.
.FRIDAY...Southeast winds 10 to 15 knots becoming west 15 to
20 knots. A chance of showers early, then showers. A chance of
showers late. Waves 1 to 3 feet building to 2 to 4 feet.
.FRIDAY NIGHT...West winds 15 to 20 knots diminishing to 10 to
15 knots. Waves 3 to 5 feet subsiding to 2 to 3 feet.
.SATURDAY...West winds 15 to 20 knots. Waves 3 to 6 feet.
.SATURDAY NIGHT...West winds 15 to 20 knots diminishing to 10 to
15 knots. Waves 3 to 6 feet.
.SUNDAY...West winds 15 to 20 knots diminishing to 10 to
15 knots. Waves 2 to 4 feet.
.MONDAY...West winds 5 to 10 knots becoming southwest. Waves 1 to
3 feet.
.TUESDAY...Southwest winds 10 to 15 knots becoming northwest.
Showers likely. Waves 1 to 3 feet.

$$

LOZ063>065-190300-
Lake Ontario open waters from Hamlin Beach to the Saint Lawrence
River-
431 PM EDT Thu Apr 18 2024

.TONIGHT...South winds 5 to 15 knots becoming southeast.
Scattered showers early. Waves 1 to 3 feet.
.FRIDAY...Southeast winds 15 to 25 knots becoming southwest. A
chance of showers late in the morning. Showers in the afternoon.
Waves 2 to 4 feet building to 3 to 6 feet.
.FRIDAY NIGHT...West winds 15 to 20 knots diminishing to 10 to
15 knots. A chance of showers in the evening. Waves 3 to 6 feet
subsiding to 2 to 4 feet.
.SATURDAY...Southwest winds 15 to 25 knots becoming west to
30 knots. A chance of showers in the afternoon. Waves 2 to 4 feet
building to 5 to 8 feet. Waves occasionally around 10 feet.
.SATURDAY NIGHT...West winds to 30 knots diminishing to 15 to
25 knots. Waves 5 to 9 feet subsiding to 3 to 6 feet. Waves
occasionally around 11 feet.
.SUNDAY...West winds 15 to 20 knots. Waves 3 to 6 feet subsiding
to 2 to 4 feet.
.MONDAY...West winds 5 to 15 knots becoming south. Waves 2 to
4 feet subsiding to 1 to 3 feet.
.TUESDAY...South winds 10 to 15 knots becoming west. Rain showers
likely. Waves 1 to 3 feet.

$$

LOZ061-190300-
MAFOR 1821/
ONTARIO WEST 1/2 12500 11400 11300 12310 11416 11520. Waves 1 to
3 feet subsiding to 1 foot or less tonight. Waves 1 to 2 feet
building to 2 to 4 feet Friday.

ONTARIO EAST 1/2 11510 19516 11410 12310 12320 11336 11436. Waves
1 to 3 feet tonight. Waves 2 to 4 feet building to 3 to 6 feet
Friday.

$$