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Latest Great Lakes Marine Forecast by KBUF
Issued 5/9/2026 4:03 PM America/New_York.
Valid through 5/9/2026 11:00 PM America/New_York.
fzus61 kbuf 092003
glfsl
expires:202605100300;;288561
forecast for the saint lawrence river
including the thousand islands region
national weather service buffalo ny
403 pm edt sat may 9 2026
slz022-024-100300-
saint lawrence river from cape vincent to saint regis
403 pm edt sat may 9 2026
.tonight...south winds 5 to 15 knots becoming southwest. showers.
.sunday...southwest winds 5 to 15 knots. mostly sunny.
.sunday night...southwest winds 5 to 15 knots diminishing to less
than 10 knots. becoming mainly clear.
.monday...west winds 10 knots or less. a chance of rain showers
in the afternoon.
.monday night...west winds 10 knots or less becoming northwest. a
chance of rain showers in the evening.
.tuesday...northwest winds 10 knots or less becoming southeast.
mainly clear, then becoming mostly cloudy.
.wednesday...southeast winds 5 to 10 knots. rain showers likely.
.thursday...east winds 5 to 10 knots becoming light and variable.
a chance of showers.
$$
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Latest Great Lakes Marine Forecast by KBUF
Issued 5/9/2026 4:02 PM America/New_York.
Valid through 5/9/2026 11:00 PM America/New_York.
fzus61 kbuf 092002
glflo
expires:202605100300;;288544
open lake forecast for lake ontario
national weather service buffalo ny
402 pm edt sat may 9 2026
for waters beyond five nautical miles of shore on lake ontario
waves are the significant wave height - the average of the highest
1/3 of the wave spectrum. occasional wave height is the average of
the highest 1/10 of the wave spectrum.
.synopsis...a weak 29.5 inch low will move from the upper great
lakes tonight to western quebec by early sunday before moving to
northern quebec early monday. meanwhile, a trailing cold front will
cross the lake tonight. a 30.4 inch high will then build from the
upper great lakes monday to the lower great lakes by tuesday. a 29.8
inch low will move across the lower great lakes into the ohio valley
wednesday.
loz063>065-100300-
lake ontario open waters from hamlin beach to the saint lawrence
river-
402 pm edt sat may 9 2026
.tonight...south winds 10 to 15 knots becoming west. showers this
evening, then a chance of showers after midnight. waves 1 to
3 feet building to 2 to 4 feet, then subsiding to 1 to 3 feet.
.sunday...west winds 10 to 15 knots increasing to 15 to 20 knots.
waves 1 to 3 feet building to 2 to 4 feet.
.sunday night...west winds 15 to 20 knots diminishing to 5 to
10 knots. waves 2 to 4 feet subsiding to 1 foot or less.
.monday...west winds 5 to 15 knots. waves 1 to 3 feet.
.monday night...west winds 5 to 15 knots becoming northwest.
waves 1 to 3 feet.
.tuesday...northwest winds 5 to 15 knots becoming southeast. rain
showers likely tuesday night. waves 2 feet or less.
.wednesday...southeast winds 15 to 20 knots becoming south 10 to
15 knots. showers. waves 1 to 3 feet.
.thursday...northwest winds 5 to 10 knots becoming north. a
chance of showers. waves 2 feet or less.
$$
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