FZUS61 KBUF 070204

GLFLO 



Open Lake Forecast for Lake Ontario

National Weather Service Buffalo NY

1004 PM EDT Sun Apr 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 compact 29.8 inch low pressure over the central 

Great Lakes will deepen to 29.5 inches as it advances across 

southern Ontario Canada overnight and Monday, while dragging its 

cold front across the lake Monday afternoon. A 30.2 inch high will

build across the lake Tuesday through Wednesday. A 29.9 inch low 

over the Ohio Valley Thursday will pass south of the lake Thursday

night and reach the Atlantic coastline Friday.



LOZ062-070915-

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

1004 PM EDT Sun Apr 6 2025



.OVERNIGHT...North winds 5 to 15 knots becoming northeast

less than 10 knots. Waves 2 feet or less. 

.MONDAY...South winds 5 to 15 knots. A chance of rain showers

late. Waves 2 feet or less. 

.MONDAY NIGHT...West winds 15 to 25 knots increasing to 30 knots.

Rain showers likely with a chance of snow showers in the evening,

then a chance of snow showers overnight. Waves 3 to 6 feet

building to 7 to 11 feet. Waves occasionally around 14 feet. 

.TUESDAY...Northwest winds to 30 knots. A chance of snow showers.

Waves 7 to 11 feet subsiding to 6 to 9 feet. Waves occasionally

around 14 feet. 

.TUESDAY NIGHT...Northwest winds to 30 knots becoming west and

diminishing to 10 to 15 knots. Waves 5 to 9 feet subsiding to

3 to 6 feet. Waves occasionally around 11 feet. 

.WEDNESDAY...West winds 10 to 15 knots becoming southeast. Waves

2 to 4 feet subsiding to 1 to 2 feet. 

.THURSDAY...Southeast winds 10 to 15 knots becoming northeast.

Rain likely. Waves 1 to 2 feet building to 2 to 4 feet. 

.FRIDAY...Northeast winds 10 to 15 knots becoming north. A chance

of rain. Waves 2 to 3 feet. 



$$



LOZ063>065-070915-

Lake Ontario open waters from Hamlin Beach to the Saint Lawrence

River-

1004 PM EDT Sun Apr 6 2025



.OVERNIGHT...Northwest winds 5 to 15 knots becoming north.

Waves 1 to 3 feet. 

.MONDAY...Southeast winds 10 knots or less becoming east. Waves

1 foot or less. 

.MONDAY NIGHT...South winds 15 to 25 knots becoming west to

30 knots. Rain and snow showers likely in the evening, then a

chance of snow showers overnight. Waves 2 feet or less building

to 10 to 13 feet. Waves occasionally around 16 feet. 

.TUESDAY...West winds to 30 knots. Snow showers likely. Waves

10 to 14 feet. Waves occasionally around 18 feet. 

.TUESDAY NIGHT...Northwest winds to 30 knots diminishing to 15 to

20 knots. Waves 8 to 12 feet subsiding to 4 to 7 feet. Waves

occasionally around 15 feet. 

.WEDNESDAY...West winds 15 to 20 knots becoming south 10 to

15 knots. A chance of snow showers during the day. Waves 3 to

5 feet subsiding to 1 to 3 feet. 

.THURSDAY...Southeast winds 10 to 15 knots becoming east. Rain

likely. Waves 1 to 3 feet. 

.FRIDAY...Northeast winds 10 to 15 knots becoming north. A chance

of rain. Waves 1 to 3 feet. 



$$



LOZ061-070915-

MAFOR 0703/

ONTARIO WEST 1/2 11810 11800 11200 11400 11300 11310 12630. A

chance of snow and rain showers Monday evening. Waves 2 feet or

less overnight and Monday. Waves 3 to 6 feet building to 5 to 8

feet, and occasionally around 10 feet Monday evening. 



ONTARIO EAST 1/2 11710 11800 11100 12400 11200 11300 11637. Waves

1 to 3 feet overnight. Waves 1 foot or less Monday. Waves 1 foot

or less building to 3 to 5 feet Monday evening. 



$$