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open lake forecast for lake ontario
national weather service buffalo ny
402 pm est fri jan 9 2026

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 29.4 inch low will move through quebec tonight, with a 
trailing cold front crossing the lake this evening. a 30.2 high will 
move across the lake tonight before another 29.6 inch low develops 
over lower michigan saturday, then moves to southern quebec on 
sunday while slowly deepening to 29.4 inches and dragging a trailing 
cold front across the lake saturday night. a 30.4 inch high building 
over the southeast will then ridge north across the lake monday and 
tuesday.


loz065-100400-
lake ontario open waters from mexico bay to the saint lawrence
river-
402 pm est fri jan 9 2026

...gale warning in effect until 10 pm est this evening...

.tonight...southwest gales to 40 knots becoming west and
diminishing to 10 to 15 knots after midnight. rain showers likely
early. waves 11 to 16 feet subsiding to 5 to 8 feet. waves
occasionally around 20 feet. 
.saturday...north winds 5 to 15 knots becoming east. a chance of
rain late. waves 3 to 5 feet subsiding to 1 to 3 feet. 
.saturday night...east winds 10 to 15 knots becoming southwest
and increasing to 30 knots overnight. rain and snow showers in
the evening, then rain showers with a chance of snow showers
overnight. waves 1 to 3 feet building to 6 to 9 feet. waves
occasionally around 11 feet. 
.sunday...southwest winds to 30 knots becoming west and
increasing to 35 knot gales in the afternoon. a chance of rain
and snow showers in the morning, then lake effect snow showers
likely in the afternoon. waves 8 to 11 feet building to 10 to
15 feet. waves occasionally around 19 feet. 
.sunday night...northwest gales to 35 knots becoming west and
diminishing to 15 to 25 knots. snow showers likely in the
evening, then a chance of snow showers overnight. waves 11 to
15 feet subsiding to 6 to 10 feet. waves occasionally around
19 feet. 
.monday...west winds 15 to 25 knots. a chance of snow showers.
waves 4 to 7 feet building to 6 to 9 feet. waves occasionally
around 11 feet. 
.tuesday...southwest winds 15 to 25 knots. rain showers likely
tuesday night. waves 4 to 7 feet subsiding to 3 to 6 feet. waves
occasionally around 9 feet. 
.wednesday...southwest winds 15 to 20 knots becoming north. rain
and snow showers likely during the day, then snow showers likely
with a chance of freezing rain wednesday night. waves 3 to 6 feet
subsiding to 2 to 4 feet. 

$$