(1/3)
Latest Great Lakes Marine Forecast by KBUF
Issued 7/11/2025 10:02 PM America/New_York.
Valid through 7/12/2025 5:00 AM America/New_York.
fzus61 kbuf 120202
glflo
expires:202507120900;;290859
open lake forecast for lake ontario
national weather service buffalo ny
1002 pm edt fri jul 11 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 29.6 inch low will lift across the upper great lakes
tonight, then into northwest ontario on saturday, before reaching
james bay on sunday while also deepening to 29.2 inches. in the
process, the system will push a warm front across the lake saturday
night, followed by a slow-moving trailing cold front later sunday
into sunday night. a 30.1 inch high over the ohio valley will then
build across the lower great lakes monday through wednesday.
loz062-120900-
lake ontario open waters from the niagara river to hamlin beach-
1002 pm edt fri jul 11 2025
.overnight...southeast winds 10 knots or less becoming
south. a chance of showers and thunderstorms late. waves 1 foot
or less.
.saturday...southeast winds 10 knots or less becoming east. waves
1 foot or less.
.saturday night...southeast winds 5 to 10 knots becoming
southwest. a chance of showers. waves 1 to 2 feet.
.sunday...southwest winds around 10 knots. showers likely with a
chance of thunderstorms. waves 1 to 2 feet.
.sunday night...southwest winds 5 to 10 knots becoming west. a
chance of showers and thunderstorms in the evening. waves 2 feet
or less.
.monday...west winds 5 to 10 knots becoming southwest. waves
1 foot or less.
.tuesday...west winds 10 knots or less becoming southwest. waves
1 foot or less.
.wednesday...southwest winds 5 to 10 knots becoming west. a
chance of showers. waves 2 feet or less.
winds and waves higher in and near thunderstorms.
$$
(2/3)
Latest Great Lakes Marine Forecast by KBUF
Issued 7/11/2025 10:02 PM America/New_York.
Valid through 7/12/2025 5:00 AM America/New_York.
fzus61 kbuf 120202
glflo
expires:202507120900;;290860
open lake forecast for lake ontario
national weather service buffalo ny
1002 pm edt fri jul 11 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 29.6 inch low will lift across the upper great lakes
tonight, then into northwest ontario on saturday, before reaching
james bay on sunday while also deepening to 29.2 inches. in the
process, the system will push a warm front across the lake saturday
night, followed by a slow-moving trailing cold front later sunday
into sunday night. a 30.1 inch high over the ohio valley will then
build across the lower great lakes monday through wednesday.
loz063>065-120900-
lake ontario open waters from hamlin beach to the saint lawrence
river-
1002 pm edt fri jul 11 2025
.overnight...southeast winds less than 10 knots becoming
south. waves 1 foot or less.
.saturday...south winds 5 to 10 knots becoming east. waves 1 foot
or less.
.saturday night...east winds 5 to 15 knots becoming south. a
chance of showers overnight. waves 2 feet or less.
.sunday...south winds 5 to 15 knots becoming southwest. showers
likely with a chance of thunderstorms in the morning, then
showers with thunderstorms likely in the afternoon. waves 1 to
2 feet.
.sunday night...southwest winds 5 to 10 knots becoming west.
showers with a chance of thunderstorms in the evening, then a
chance of showers and thunderstorms overnight. waves 2 feet or
less.
.monday...west winds 5 to 10 knots becoming southwest. waves
1 foot or less.
.tuesday...southwest winds 10 knots or less becoming south. waves
1 foot or less.
.wednesday...south winds 5 to 15 knots becoming southwest. a
chance of showers wednesday night. waves 2 feet or less.
winds and waves higher in and near thunderstorms.
$$
(3/3)
Latest Great Lakes Marine Forecast by KBUF
Issued 7/11/2025 10:02 PM America/New_York.
Valid through 7/12/2025 5:00 AM America/New_York.
fzus61 kbuf 120202
glfsl
expires:202507120900;;290858
forecast for the saint lawrence river
including the thousand islands region
national weather service buffalo ny
1002 pm edt fri jul 11 2025
slz022-024-120900-
saint lawrence river from cape vincent to saint regis
1002 pm edt fri jul 11 2025
.overnight...light and variable winds. patchy fog late.
.saturday...light and variable winds. patchy fog early. a chance
of showers and thunderstorms in the afternoon.
.saturday night...south winds 10 knots or less. a chance of
showers and thunderstorms in the evening, then a chance of
showers overnight.
.sunday...south winds 5 to 10 knots becoming southwest. showers
likely with a chance of thunderstorms in the morning, then
showers with thunderstorms likely in the afternoon.
.sunday night...southwest winds 10 knots or less. showers with a
chance of thunderstorms in the evening, then a chance of showers
and thunderstorms overnight.
.monday...southwest winds 10 knots or less. becoming mainly
clear.
.tuesday...southwest winds 10 knots or less becoming south.
mainly clear, then becoming partly cloudy.
.wednesday...south winds 10 knots or less becoming southwest. a
chance of showers wednesday night.
winds and waves higher in and near thunderstorms.
$$
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