FZUS61 KBUF 030203

GLFLO 



Open Lake Forecast for Lake Ontario

National Weather Service Buffalo NY

1002 PM EDT Wed Jul 2 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 compact 29.6 surface low over Central Quebec tonight 

will swing a weak cold front slowly across the lake later 

tonight and tomorrow. An expansive 30.1 inch area of high 

pressure will then build across the Great Lakes Thursday night and 

Friday...before drifting to the eastern seaboard Saturday. A wavy 

cold frontal boundary is then forecast to slowly push southeastward 

across the Upper Great Lakes and southern Ontario during Sunday. 

This will be followed by an 30.1 inch area of high pressure that 

will settle over the Lake through the day Monday.



LOZ062-030900-

Lake Ontario open waters from the Niagara River to Hamlin Beach-

1002 PM EDT Wed Jul 2 2025



.REST OF TONIGHT...Southwest winds 5 to 15 knots becoming west. A

chance of showers and thunderstorms late this evening, then a

chance of showers after midnight. A chance of showers and

thunderstorms late. Waves 1 to 2 feet. 

.THURSDAY...Northwest winds 5 to 10 knots becoming west. A chance

of showers and thunderstorms early. Waves 1 foot or less. 

.THURSDAY NIGHT...Northwest winds 5 to 10 knots becoming north.

Waves 1 to 2 feet. 

.FRIDAY...North winds 10 knots or less becoming southeast. Waves

1 foot or less. 

.FRIDAY NIGHT...Southeast winds 10 knots or less becoming south.

Waves 1 foot or less. 

.SATURDAY...South winds 5 to 15 knots becoming southwest. Waves

2 feet or less. 

.SUNDAY...Southwest winds 10 to 15 knots. Waves 1 to 3 feet. 

.MONDAY...West winds 10 to 15 knots becoming north. A chance of

showers and thunderstorms. Waves 1 to 2 feet. 



Winds and waves higher in and near thunderstorms.



$$



LOZ063>065-030900-

Lake Ontario open waters from Hamlin Beach to the Saint Lawrence

River-

1002 PM EDT Wed Jul 2 2025



.REST OF TONIGHT...West winds 5 to 15 knots. A chance of showers

and thunderstorms late this evening. A chance of showers and

thunderstorms late. Waves 1 to 2 feet. 

.THURSDAY...West winds 5 to 10 knots. A chance of showers and

thunderstorms in the morning. Waves 1 to 2 feet. 

.THURSDAY NIGHT...West winds 5 to 10 knots becoming north. Waves

2 feet or less. 

.FRIDAY...North winds 5 to 10 knots becoming southwest. Waves

1 foot or less. 

.FRIDAY NIGHT...Southwest winds 5 to 10 knots becoming south.

Waves 1 foot or less. 

.SATURDAY...South winds 5 to 10 knots. Waves 2 feet or less. 

.SUNDAY...Southwest winds 5 to 15 knots. Waves 1 to 3 feet. 

.MONDAY...Southwest winds 10 to 15 knots becoming north. A chance

of showers and thunderstorms. Waves 1 to 3 feet. 



Winds and waves higher in and near thunderstorms.



$$



LOZ061-030900-

MAFOR 0303/

ONTARIO WEST 1/2 11500 12600 11700 13600 11700. A chance of

showers Thursday morning. Waves 2 feet or less. 



ONTARIO EAST 1/2 11510 11610 14600 11600 11700. A chance of

showers Thursday morning. Waves 1 to 2 feet. 



$$