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open lake forecast for lake ontario
national weather service buffalo ny
402 am est sat dec 27 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 ridge of high pressure averaging 30.2 inches will 
build into quebec and new england through tonight. low pressure 
averaging 29.1 inches will then cross the lower great lakes sunday 
night, before moving to northern new england and southern quebec 
monday, then to the canadian maritimes by tuesday while deepening to 
28.9 inches.


loz064-065-271600-
lake ontario open waters from sodus bay to the saint lawrence
river-
402 am est sat dec 27 2025

...gale watch in effect from monday morning through late tuesday
night...

.today...north winds 5 to 15 knots becoming northeast. waves 1 to
3 feet. 
.tonight...northeast winds 5 to 10 knots becoming southeast.
waves 1 foot or less. 
.sunday...southeast winds 10 to 15 knots. a chance of rain in the
afternoon. waves 2 feet or less. 
.sunday night...southeast winds 10 to 15 knots increasing to
15 to 25 knots. rain. waves 1 to 3 feet building to 3 to 5 feet. 
.monday...south winds to 30 knots becoming west and increasing to
40 knot gales. rain and snow showers during the day, then lake
effect snow showers monday night. waves 7 to 10 feet building to
16 to 21 feet. waves occasionally around 27 feet. 
.tuesday...northwest gales to 40 knots becoming west and
diminishing to 30 knots. lake effect snow showers. waves 15 to
19 feet subsiding to 10 to 13 feet. waves occasionally around
24 feet. 
.wednesday...west winds to 30 knots becoming northwest. lake
effect snow showers. waves 10 to 14 feet. waves occasionally
around 18 feet. 

$$

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forecast for the saint lawrence river
including the thousand islands region
national weather service buffalo ny
402 am est sat dec 27 2025


slz022-271600-
saint lawrence river from cape vincent to ogdensburg-
402 am est sat dec 27 2025

.today...northeast winds 10 knots or less. mostly cloudy early,
then becoming mostly sunny. 
.tonight...northeast winds less than 10 knots. partly to mostly
cloudy. 
.sunday...light and variable winds. partly sunny in the morning,
then becoming mostly cloudy. 
.sunday night...northeast winds 10 knots or less becoming east.
freezing rain in the evening, then freezing rain and rain
overnight. 
.monday...south winds 15 to 20 knots becoming west. rain, snow
showers and freezing rain during the day, then lake effect snow
showers monday night. 
.tuesday...west winds 15 to 20 knots diminishing to 5 to
15 knots. snow showers during the day, then a chance of snow
showers tuesday night. 
.wednesday...southwest winds 5 to 10 knots becoming west. snow
showers likely. 

$$