Great Lakes Forecast
Issued by NWS

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584
FZUS61 KBUF 300902
GLFSL

Forecast for the Saint Lawrence River
including the Thousand Islands Region
National Weather Service Buffalo NY
402 AM EST Sun Nov 30 2025

SLZ022-301600-
Saint Lawrence River from Cape Vincent to Ogdensburg-
402 AM EST Sun Nov 30 2025

.TODAY...Southeast winds 15 to 20 knots becoming south. Snow
likely early, then snow showers. Rain and snow showers late.
.TONIGHT...Southwest winds 15 to 25 knots becoming northwest.
Rain and snow showers through the early overnight, then a chance
of snow showers late.
.MONDAY...Northwest winds 5 to 15 knots becoming southwest less
than 10 knots. A chance of snow showers in the morning.
.MONDAY NIGHT...Light and variable winds becoming south 5 to
10 knots. A chance of snow showers overnight.
.TUESDAY...Southeast winds 10 knots or less becoming west. Snow
showers during the day.
.WEDNESDAY...Southwest winds 5 to 10 knots increasing to 15 to
20 knots. A chance of snow showers during the day, then snow
showers Wednesday night.
.THURSDAY...West winds 15 to 20 knots diminishing to 5 to
15 knots. Snow showers during the day, then a chance of snow
showers Thursday night.

$$

SLZ024-301600-
Saint Lawrence River from Ogdensburg to Saint Regis-
402 AM EST Sun Nov 30 2025

.TODAY...Southeast winds 5 to 15 knots becoming south 15 to
20 knots. Snow showers through early afternoon, then rain and
snow showers likely late.
.TONIGHT...Southwest winds 15 to 25 knots becoming northwest.
Rain and snow showers in the evening, then snow showers after
midnight. A chance of snow showers late.
.MONDAY...Northwest winds 15 to 20 knots becoming west and
diminishing to less than 10 knots in the afternoon. A chance of
snow showers in the morning.
.MONDAY NIGHT...Light and variable winds. A chance of snow
showers overnight.
.TUESDAY...Southeast winds 10 knots or less becoming southwest.
Snow showers likely during the day.
.WEDNESDAY...Southwest winds 5 to 15 knots increasing to 15 to
20 knots. A chance of snow showers during the day, then snow
showers Wednesday night.
.THURSDAY...West winds 15 to 20 knots diminishing to 5 to
10 knots. Snow showers during the day.

$$