####018002773####
FZUS61 KBUF 301436

GLFLO 



Open Lake Forecast for Lake Ontario

National Weather Service Buffalo NY

1036 AM EDT Tue Apr 30 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 cold front will cross the lake this afternoon, then

a 29.9 inch high will slide across the lake tonight and Wednesday.

A 29.6 inch low will then develop across the central Plains on 

Thursday, deepening to 29.4 inches near western Lake Superior on 

Friday. A warm front will extend eastward from this low towards 

the lake Friday. A cold front will cross the lake Saturday.



LOZ062-302115-

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

1036 AM EDT Tue Apr 30 2024



.THIS AFTERNOON...East winds 10 knots or less. Showers likely 

with a chance of thunderstorms. Waves 1 foot or less. 

.TONIGHT...East winds 10 knots or less becoming northwest. Waves

2 feet or less. 

.WEDNESDAY...Light and variable winds becoming east 5 to 10 

knots. Waves 1 foot or less. 

.WEDNESDAY NIGHT...Southeast winds 5 to 10 knots becoming west.

Waves 1 foot or less. 

.THURSDAY...West winds 5 to 10 knots. Waves 1 foot or less. 

.FRIDAY...East winds 10 to 15 knots. A chance of showers. Waves 1

to 2 feet. 

.SATURDAY...Southeast winds 5 to 10 knots. A chance of showers. 

Waves 1 foot or less. 



Winds and waves higher in and near thunderstorms.



$$



LOZ063>065-302115-

Lake Ontario open waters from Hamlin Beach to the Saint Lawrence

River-

1036 AM EDT Tue Apr 30 2024



.THIS AFTERNOON...North winds 10 knots or less becoming 

northeast. Showers likely with a chance of thunderstorms. Waves 1 

foot or less. 

.TONIGHT...Northeast winds 5 to 10 knots becoming north. A chance

of showers early. Waves 1 foot or less. 

.WEDNESDAY...Northwest winds 5 to 10 knots becoming southeast.

Waves 1 foot or less. 

.WEDNESDAY NIGHT...Southeast winds 5 to 10 knots becoming

southwest. Waves 1 foot or less. 

.THURSDAY...West winds 10 to 15 knots. Waves 2 feet or less. 

.FRIDAY...East winds 10 to 15 knots. A chance of showers. Waves 2

feet or less. 

.SATURDAY...South winds 10 to 15 knots. A chance of showers. 

Waves 2 feet or less. 



Winds and waves higher in and near thunderstorms.



$$



LOZ061-302115-

MAFOR 3015/

ONTARIO WEST 1/2 14200 11100 11800 11600 11400. A chance of

showers and thunderstorms this afternoon. Waves 2 feet or less. 



ONTARIO EAST 1/2 11700 11806 13100 12800 11700. A chance of

thunderstorms this afternoon. Waves 1 foot or less. 



$$

####018000981####
FZUS61 KBUF 301437

GLFSL 



Forecast for the Saint Lawrence River

including the Thousand Islands Region

National Weather Service Buffalo NY

1037 AM EDT Tue Apr 30 2024



SLZ022-024-302115-

Saint Lawrence River from Cape Vincent to Saint Regis

1037 AM EDT Tue Apr 30 2024



.THIS AFTERNOON...Northeast winds 10 to 15 knots. Occasional 

showers with a chance of thunderstorms. 

.TONIGHT...Northeast winds 10 knots or less. A chance of showers

in the evening. 

.WEDNESDAY...North winds less than 10 knots becoming west. Cloudy

in the morning, then becoming partly sunny. 

.WEDNESDAY NIGHT...Southeast winds less than 10 knots. Partly to 

mostly cloudy. 

.THURSDAY...Southwest winds 10 knots or less. A chance of showers

during the day. 

.FRIDAY...East winds 5 to 10 knots. A chance of showers Friday 

night. 

.SATURDAY...Southeast winds 5 to 10 knots. A chance of showers. 



Winds and waves higher in and near thunderstorms.



$$