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forecast for the saint lawrence river
including the thousand islands region
national weather service buffalo ny
416 am edt thu apr 3 2025


slz022-024-031515-
saint lawrence river from cape vincent to saint regis
416 am edt thu apr 3 2025

.today...south winds 15 to 20 knots becoming southwest. rain
showers with a chance of thunderstorms early, then just a chance 
of rain showers early this afternoon. some thunderstorms may 
produce gusty winds. 
.tonight...west winds 15 to 20 knots diminishing to 10 to
15 knots. partly to mostly cloudy. 
.friday...west winds 5 to 10 knots becoming northwest. mostly
sunny. 
.friday night...northwest winds less than 10 knots becoming east.
partly cloudy in the evening, then becoming mostly cloudy. 
.saturday...east winds 10 to 15 knots. rain showers. 
.sunday...west winds 5 to 10 knots. rain showers likely. 
.monday...northwest winds 10 to 15 knots. a chance of rain and 
snow showers. 

winds and waves higher in and near thunderstorms.

$$

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open lake forecast for lake ontario
national weather service buffalo ny
413 am edt thu apr 3 2025

for waters beyond five nautical miles of shore on lake ontario

waves are the significant wave height - the average of the highest
1/3 of the wave spectrum. occasional wave height is the average of
the highest 1/10 of the wave spectrum.

.synopsis...a 29.0 inch low will track from lake superior to
western quebec today with its trailing cold front crossing the
lake in the process. a 30.2 inch high will build across the great
lakes region tonight and friday. a frontal boundary will develop 
south of the lake with a series of weak lows tracking along this 
boundary during the weekend. a weak 29.7 inch trough of low 
pressure will move across the great lakes on monday.


loz063>065-031515-
lake ontario open waters from hamlin beach to the saint lawrence
river-
413 am edt thu apr 3 2025

.today...south winds to 30 knots becoming southwest 15 to
25 knots. showers with a chance of thunderstorms early, then just a
chance of showers. some thunderstorms may produce gusty winds. 
waves 4 to 7 feet subsiding to 3 to 6 feet. waves occasionally 
around 9 feet. 
.tonight...west winds 15 to 20 knots diminishing to 5 to
15 knots. waves 3 to 6 feet subsiding to 2 to 4 feet. 
.friday...west winds 5 to 10 knots. waves 1 to 3 feet. 
.friday night...southwest winds 10 to 15 knots becoming east. a
chance of rain showers in the evening, then rain showers likely
overnight. waves 2 feet or less. 
.saturday...east winds 15 to 25 knots. rain showers. waves 
building to 3 to 6 feet. 
.sunday...northwest winds 10 to 15 knots. rain showers. waves 1 
to 3 feet. 
.monday...northwest winds 10 to 15 knots becoming west 15 to
20 knots. a chance of rain and snow showers monday night. waves
building to 3 to 6 feet. 

winds and waves higher in and near thunderstorms.

$$