Great Lakes Forecast
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525
FZUS61 KBUF 212102
GLFSL

Forecast for the Saint Lawrence River
including the Thousand Islands Region
National Weather Service Buffalo NY
402 PM EST Fri Nov 21 2025

SLZ022-220400-
Saint Lawrence River from Cape Vincent to Ogdensburg-
402 PM EST Fri Nov 21 2025

.TONIGHT...West winds 10 knots or less. Partly cloudy.
.SATURDAY...Northwest winds 10 knots or less. Partly sunny.
.SATURDAY NIGHT...Northwest winds less than 10 knots. Partly
cloudy in the evening, then becoming mostly cloudy.
.SUNDAY...South winds 5 to 10 knots becoming southwest. Snow and
rain.
.SUNDAY NIGHT...West winds 10 knots or less. Rain likely in the
evening, then a chance of rain overnight.
.MONDAY...West winds 10 knots or less becoming south. Partly to
mostly cloudy.
.TUESDAY...South winds 5 to 10 knots. Rain.
.WEDNESDAY...South winds 5 to 15 knots becoming southwest. Rain
showers likely.

$$

SLZ024-220400-
Saint Lawrence River from Ogdensburg to Saint Regis-
402 PM EST Fri Nov 21 2025

.TONIGHT...West winds 10 knots or less becoming southwest. Mostly
cloudy.
.SATURDAY...West winds 5 to 10 knots becoming northwest. Partly
to mostly sunny.
.SATURDAY NIGHT...West winds 10 knots or less becoming southwest.
Partly cloudy in the evening, then becoming mostly cloudy.
.SUNDAY...South winds 10 knots or less becoming southwest. Snow
and rain.
.SUNDAY NIGHT...West winds 10 knots or less. Rain likely in the
evening, then a chance of rain overnight.
.MONDAY...West winds 10 knots or less becoming south. Mostly
cloudy.
.TUESDAY...South winds 10 knots or less. Rain.
.WEDNESDAY...South winds 5 to 15 knots becoming southwest. Rain
showers likely.

$$