At 2:47 p.m. EDT, Environment Canada meteorologists are tracking a severe thunderstorm capable of producing very heavy rain.
Thunderstorm Location: Grassie to St. Catharines
Motion: Moving very slowly
Hazards: Rain: very heavy (50 - 100 mm)
Locations in the Path: Beamsville Vineland St. Catharines Thorold Niagara Falls
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Heavy rain may cause flash flooding and significant reductions to visibility.