####018003715####
FZUS61 KBUF 271747

GLFLO 



Open Lake Forecast for Lake Ontario

National Weather Service Buffalo NY

147 PM EDT Sat Apr 27 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 large 30.4 inch high along the coast of New England 

will remain in place today while a warm front pushes northeast 

across the lake. A 29.6 inch low will then track from the central

Plains Sunday to Lake Superior by Monday evening...then to Ontario

Province on Tuesday. A cold front trailing from the low will 

cross the lake on Tuesday...with a 29.9 inch bubble of high 

pressure then forecast to slide across the lake Tuesday night and

Wednesday.



LOZ062-272115-

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

147 PM EDT Sat Apr 27 2024



.THIS AFTERNOON...Southeast winds 10 to 15 knots. Showers. Waves

1 to 3 feet. 

.TONIGHT...Southeast winds 10 to 15 knots becoming southwest. A

chance of showers early. Waves 1 to 3 feet. 

.SUNDAY...Southwest winds 5 to 15 knots. A chance of showers in

the morning, then a chance of showers and thunderstorms in the

afternoon. Waves 1 to 2 feet. 

.SUNDAY NIGHT...West winds 5 to 10 knots becoming northeast and

increasing to 15 to 20 knots. A chance of showers and

thunderstorms in the evening, then a chance of showers overnight.

Waves 2 feet or less. 

.MONDAY...East winds 15 to 20 knots diminishing to 10 to

15 knots. A chance of showers. Waves 2 to 4 feet building to 3 to

5 feet, then subsiding to 1 to 3 feet. 

.TUESDAY...East winds 10 knots or less becoming northeast.

Showers likely during the day, then a chance of showers Tuesday

night. Waves 1 to 2 feet. 

.WEDNESDAY...Southeast winds 10 knots or less becoming south.

Waves 1 to 2 feet. 



$$



LOZ063>065-272115-

Lake Ontario open waters from Hamlin Beach to the Saint Lawrence

River-

147 PM EDT Sat Apr 27 2024



.THIS AFTERNOON...South winds 15 to 25 knots. Showers. Waves 2 to

4 feet building to 3 to 5 feet. 

.TONIGHT...South winds 15 to 25 knots diminishing to 10 to

15 knots. Showers early, then a chance of showers. Waves 3 to

5 feet subsiding to 2 to 4 feet. 

.SUNDAY...South winds 15 to 20 knots becoming southwest 5 to

15 knots. A chance of showers in the morning, then a chance of

showers and thunderstorms in the afternoon. Waves 2 to 4 feet

subsiding to 1 to 3 feet. 

.SUNDAY NIGHT...West winds 5 to 15 knots becoming northeast 15 to

20 knots. A chance of showers and thunderstorms in the evening,

then a chance of showers overnight. Waves 2 feet or less building

to 2 to 4 feet. 

.MONDAY...Northeast winds 15 to 20 knots diminishing to 10 to

15 knots. A chance of showers. Waves 2 to 4 feet subsiding to

1 to 3 feet. 

.TUESDAY...Northeast winds 5 to 15 knots becoming northwest.

Showers likely with a chance of thunderstorms. Waves 2 feet or

less. 

.WEDNESDAY...Northwest winds 5 to 10 knots becoming south. Waves

1 to 2 feet. 



Winds and waves higher in and near thunderstorms.



$$



LOZ061-272115-

MAFOR 2715/

ONTARIO WEST 1/2 12316 11320 11310 12410 12510. Waves 1 to 3 feet

building to 2 to 4 feet this afternoon. Waves 2 to 4 feet

subsiding to 1 to 3 feet tonight. Waves 1 to 2 feet Sunday

morning. 



ONTARIO EAST 1/2 11420 12436 11420 14410. Waves 2 to 4 feet

building to 3 to 5 feet this afternoon. Waves 3 to 5 feet

subsiding to 2 to 4 feet tonight. Waves 2 to 4 feet subsiding to

1 to 3 feet Sunday morning. 



$$

####018001036####
FZUS61 KBUF 271748

GLFSL 



Forecast for the Saint Lawrence River

including the Thousand Islands Region

National Weather Service Buffalo NY

148 PM EDT Sat Apr 27 2024



SLZ022-024-272115-

Saint Lawrence River from Cape Vincent to Saint Regis

148 PM EDT Sat Apr 27 2024



.THIS AFTERNOON...South winds 10 to 15 knots. Showers likely 

late. 

.TONIGHT...South winds 10 to 15 knots. Showers in the evening, 

then a chance of showers after midnight. 

.SUNDAY...South winds 10 to 15 knots becoming southwest. A chance

of showers in the morning, then showers likely with a chance of

thunderstorms in the afternoon. 

.SUNDAY NIGHT...West winds 5 to 10 knots becoming north. A chance

of showers. 

.MONDAY...Northeast winds 5 to 10 knots. Showers likely Monday

night. 

.TUESDAY...Northeast winds 10 knots or less. Showers likely with

a chance of thunderstorms. 

.WEDNESDAY...North winds 10 knots or less. Partly to mostly 

cloudy. 



Winds and waves higher in and near thunderstorms.



$$