Eastern Lake Ontario
Forecast
Marine Forecast
Issued 10:30 AM EDT 30 April 2025
Today Tonight and Thursday.
Wind variable 10 knots becoming east 10 late overnight then increasing to east 15 Thursday morning. Wind increasing to east 20 Thursday afternoon then veering to south 15 Thursday evening.
Scattered showers Thursday late in the day with a risk of thunderstorms.
Strong wind warning program has ended for the season.
Waves
Issued 10:30 AM EDT 30 April 2025
Today Tonight and Thursday.
Waves 0.5 metres building to 0.5 to 1 near noon Thursday and to 1
to 1.5 Thursday evening.
Extended Forecast
Issued 03:00 AM EDT 30 April 2025
Friday
Wind south 15 knots increasing to southwest 25
in the afternoon then diminishing to west 15 late in the day.
Saturday
Wind light.
Sunday
Wind light becoming north 15 knots.
Ice Forecast*
Issued 12:00 PM EDT 30 April 2025 Today Tonight and Thursday Ice free.
*Ice Forecast and Warnings also apply to U.S. waters
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Weather Conditions
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Ice Conditions
*Ice Forecast and Warnings also apply to U.S. waters
Ice Forecasts
Issued 12:00 PM EDT 30 April 2025 Today Tonight and ThursdayIce Coverage
Ice free.
Warnings
No watches or warnings in effect.
Synopsis
Technical Marine Synopsis
Issued 10:30 AM EDT 30 April 2025 Today Tonight and Thursday At 10:30 a.m. EDT today high 1025 mb located over northeasternOntario.
By 10:30 a.m. EDT Thursday high 1024 mb located over eastern Quebec.
By 10:30 a.m. EDT Thursday approaching low 1004 mb located over
Lake Michigan.
Great Lakes - Lake Erie and Lake Ontario Area
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