Southern Ontario: Thunderstorm Outlook for Wednesday, June 30, 2021

Forecast Discussion

Isolated non-severe thunderstorms are possible during the afternoon and early evening on Wednesday from Northeastern Ontario and into Eastern Ontario. Another zone for some storms that are more questionable exists from the GTA and along the Lake Erie shoreline. The main risk will be strong wind gusts, heavy rainfall and some small hail. The storms should quickly weaken after sunset.