Southern Ontario: Thunderstorm Outlook for Friday, August 13, 2021

Forecast Discussion

Some pop-up thunderstorms are expected to develop during the afternoon and early evening on Friday through parts of Central and Eastern Ontario along with around the Golden Horseshoe. These storms will be rather weak for the most part although two areas of concern including the Lake Erie shoreline and the Ottawa Valley may see some isolated marginally severe storms. The main risk will be strong wind gusts, small hail and heavy rainfall. We aren’t expecting that strong of a tornado risk although these pop-up storms do tend to bring some funnel clouds and maybe even a brief landspout. There is also a strong risk for waterspouts over Lake Erie. The risk will come to an end after sunset as the storms fizzle out.


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