Great Lakes Forecast
Issued by NWS

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165
FZUS61 KBUF 040302
GLFSL

Forecast for the Saint Lawrence River
including the Thousand Islands Region
National Weather Service Buffalo NY
1002 PM EST Wed Dec 3 2025

SLZ022-041000-
Saint Lawrence River from Cape Vincent to Ogdensburg-
1002 PM EST Wed Dec 3 2025

.REST OF TONIGHT...Southwest winds 15 to 20 knots becoming west
10 to 15 knots. Lake effect snow late this evening, then lake
effect snow showers likely after midnight. A chance of snow
showers late.
.THURSDAY...Northwest winds 5 to 15 knots becoming west 15 to
20 knots. A chance of snow showers in the morning.
.THURSDAY NIGHT...Northwest winds 10 to 15 knots becoming south
less than 10 knots. Mainly clear.
.FRIDAY...South winds 5 to 15 knots. Partly sunny in the morning,
then becoming mostly cloudy.
.FRIDAY NIGHT...South winds 5 to 10 knots. A chance of snow
showers overnight.
.SATURDAY...South winds 10 knots or less becoming west. Snow
showers likely.
.SUNDAY...North winds 10 knots or less becoming northwest. A
chance of snow showers.
.MONDAY...North winds 10 knots or less becoming south. Partly
cloudy.

$$

SLZ024-041000-
Saint Lawrence River from Ogdensburg to Saint Regis-
1002 PM EST Wed Dec 3 2025

.REST OF TONIGHT...Southwest winds 10 to 15 knots becoming west.
Lake effect snow showers likely, then a chance of snow showers
late.
.THURSDAY...Northwest winds 10 to 15 knots increasing to 15 to
20 knots. A chance of snow showers early.
.THURSDAY NIGHT...Northwest winds 5 to 15 knots becoming south
less than 10 knots. Mainly clear.
.FRIDAY...South winds 5 to 10 knots. Partly sunny.
.FRIDAY NIGHT...South winds 10 knots or less. A chance of snow
showers overnight.
.SATURDAY...South winds 5 to 10 knots becoming west. Snow showers
likely during the day, then a chance of snow showers Saturday
night.
.SUNDAY...Northwest winds less than 10 knots. A chance of snow
showers.
.MONDAY...West winds less than 10 knots becoming southwest.
Partly cloudy.

$$