FZUS61 KBUF 030802

GLFLO 



Open Lake Forecast for Lake Ontario

National Weather Service Buffalo NY

402 AM EDT Thu Jul 3 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.



LOZ062-031500-

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

402 AM EDT Thu Jul 3 2025



.TODAY...Northwest winds around 10 knots becoming west. Waves

1 to 2 feet. 

.TONIGHT...Northwest winds 5 to 15 knots becoming north. Waves

1 to 2 feet. 

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

1 foot or less. 

.FRIDAY NIGHT...South winds 5 to 10 knots. 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 becoming west. A chance

of showers and thunderstorms Sunday night. Waves 1 to 3 feet. 

.MONDAY...Northwest winds around 10 knots becoming north. A

chance of showers and thunderstorms during the day. Waves 1 to

2 feet. 



Winds and waves higher in and near thunderstorms.



$$



LOZ063>065-031500-

Lake Ontario open waters from Hamlin Beach to the Saint Lawrence

River-

402 AM EDT Thu Jul 3 2025



.TODAY...West winds around 10 knots. A chance of showers late

this morning. Waves 1 to 2 feet. 

.TONIGHT...West winds 5 to 10 knots becoming north. Waves 2 feet

or less. 

.FRIDAY...North winds 5 to 10 knots becoming west. 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 15 knots. Waves 2 feet or less. 

.SUNDAY...Southwest winds 10 to 15 knots. A chance of showers and

thunderstorms Sunday night. Waves 1 to 3 feet. 

.MONDAY...West winds 5 to 10 knots becoming north. A chance of

showers and thunderstorms. Waves 1 to 3 feet subsiding to 1 foot

or less. 



Winds and waves higher in and near thunderstorms.



$$



LOZ061-031500-

MAFOR 0309/

ONTARIO WEST 1/2 11600 11700 13600 11710 11700 11800. Waves 1 to

2 feet. 



ONTARIO EAST 1/2 11600 11700 13600 12700 11800. Waves 1 to 2

feet. 



$$