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Latest Great Lakes Marine Forecast by KBUF
Issued 4/25/2026 4:03 AM America/New_York.
Valid through 4/25/2026 11:00 AM America/New_York.
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glfsl
expires:202604251500;;486499
forecast for the saint lawrence river
including the thousand islands region
national weather service buffalo ny
403 am edt sat apr 25 2026
slz022-024-251500-
saint lawrence river from cape vincent to saint regis
403 am edt sat apr 25 2026
.today...northeast winds 10 to 15 knots. partly sunny through
early afternoon, then becoming mostly cloudy.
.tonight...northeast winds 5 to 10 knots becoming light and
variable. mostly cloudy.
.sunday...light and variable winds. sunny.
.sunday night...northeast winds less than 10 knots. mainly clear.
.monday...light and variable winds becoming southeast 5 to
10 knots. mainly clear.
.tuesday...southeast winds 5 to 10 knots becoming south and
increasing to 15 to 20 knots. a chance of showers.
.wednesday...south winds 10 knots or less. showers likely.
$$
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Latest Great Lakes Marine Forecast by KBUF
Issued 4/25/2026 4:02 AM America/New_York.
Valid through 4/25/2026 11:00 AM America/New_York.
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glflo
expires:202604251500;;486475
open lake forecast for lake ontario
national weather service buffalo ny
402 am edt sat apr 25 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 29.7 inch low will pass through the lower lakes today
then slide southeast into the mid atlantic region. a 30.3 inch area
of high pressure will build in across the lower great lakes tonight
through monday. a 29.4 inch area of low pressure over the great
plains monday night, will advance northeast into the upper great
lakes later monday night into tuesday morning while pushing an
attendant warm front across the lake before heading northeast to
james bay tuesday night sending an attendant cold front across the
lake.
loz063>065-251500-
lake ontario open waters from hamlin beach to the saint lawrence
river-
402 am edt sat apr 25 2026
.today...east winds 15 to 25 knots becoming northeast. showers.
waves 3 to 6 feet building to 5 to 8 feet. waves occasionally
around 10 feet.
.tonight...east winds 15 to 20 knots diminishing to 5 to
15 knots. showers likely early, then a chance of showers late in
the evening. waves 3 to 6 feet subsiding to 1 to 3 feet.
.sunday...northeast winds 10 knots or less becoming northwest.
waves 1 foot or less.
.sunday night...northwest winds less than 10 knots becoming
north. waves 1 foot or less.
.monday...northeast winds 10 knots or less becoming southeast
10 to 15 knots. waves 2 feet or less.
.tuesday...southeast winds 15 to 20 knots becoming south. showers
likely. waves 1 to 3 feet building to 2 to 4 feet.
.wednesday...south winds 15 to 20 knots becoming west 5 to
15 knots. showers likely. waves 1 to 3 feet.
$$
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