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477
FZUS61 KBUF 210203
GLFSL

Forecast for the Saint Lawrence River
including the Thousand Islands Region
National Weather Service Buffalo NY
1003 PM EDT Thu Aug 20 2026

SLZ022-024-210900-
Saint Lawrence River from Cape Vincent to Saint Regis
1003 PM EDT Thu Aug 20 2026

.OVERNIGHT...Northeast winds 10 knots or less. Mainly
clear.
.FRIDAY...Northeast winds less than 10 knots. Sunny.
.FRIDAY NIGHT...Light and variable winds. Mainly clear.
.SATURDAY...Light and variable winds. Mostly sunny.
.SATURDAY NIGHT...Southeast winds 10 knots or less. A chance of
showers in the evening, then showers likely overnight.
.SUNDAY...South winds 5 to 10 knots becoming southwest. Showers
with a chance of thunderstorms.
.MONDAY...West winds 5 to 10 knots becoming southwest. Showers
likely.
.TUESDAY...Southwest winds 10 knots or less. Partly cloudy.

Winds and waves higher in and near thunderstorms.

$$