Southern Ontario: Thunderstorm Outlook for Wednesday, June 9, 2021

Forecast Discussion

Another day of slow-moving pop-up thunderstorms is expected during the afternoon and evening hours on Wednesday for a small area stretching from Sarnia through London and around the GTA. The latest data indicates the strongest potential for the storms around in the Huron/Perth counties and K/A area. There could also be a flooding threat due to the slow-moving nature of the storms with localized rainfall totals over 50mm.