Great Lakes Forecast
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874
FZUS61 KBUF 250302
GLFSL

Forecast for the Saint Lawrence River
including the Thousand Islands Region
National Weather Service Buffalo NY
1002 PM EST Mon Nov 24 2025

SLZ022-251000-
Saint Lawrence River from Cape Vincent to Ogdensburg-
1002 PM EST Mon Nov 24 2025

.OVERNIGHT...South winds 5 to 10 knots. Cloudy.
.TUESDAY...South winds 5 to 10 knots. A chance of rain late.
.TUESDAY NIGHT...Southeast winds less than 10 knots. Rain.
.WEDNESDAY...Southeast winds 10 knots or less becoming southwest
and increasing to 15 to 20 knots in the afternoon. Showers.
.WEDNESDAY NIGHT...Southwest winds 15 to 25 knots. Lake effect
rain showers in the evening, then lake effect rain and snow
showers likely overnight.
.THURSDAY...Southwest winds to 30 knots becoming west and
diminishing to 15 to 20 knots. Lake effect rain and snow showers
likely during the day, then lake effect snow showers likely
Thursday night.
.FRIDAY...West winds 15 to 20 knots diminishing to 5 to 10 knots.
A chance of snow showers during the day.
.SATURDAY...West winds 10 knots or less becoming south. A chance
of snow showers Saturday night.

$$

SLZ024-251000-
Saint Lawrence River from Ogdensburg to Saint Regis-
1002 PM EST Mon Nov 24 2025

.OVERNIGHT...South winds 5 to 10 knots becoming southwest.
Cloudy.
.TUESDAY...Southwest winds 10 knots or less becoming southeast.
Mostly cloudy.
.TUESDAY NIGHT...Light and variable winds. Rain.
.WEDNESDAY...East winds 10 knots or less becoming south and
increasing to 15 to 20 knots in the afternoon. Rain showers.
.WEDNESDAY NIGHT...Southwest winds 15 to 25 knots increasing to
30 knots. Lake effect rain showers in the evening, then rain
showers likely with a chance of snow showers overnight.
.THURSDAY...Southwest winds to 30 knots becoming west 15 to
25 knots. Lake effect rain and snow showers likely during the
day, then lake effect snow showers likely Thursday night.
.FRIDAY...West winds 15 to 20 knots diminishing to 10 to
15 knots. Snow showers likely during the day.
.SATURDAY...West winds 10 knots or less becoming south. A chance
of snow showers Saturday night.

$$