Southern Ontario: Thunderstorm Outlook for Tuesday, July 27, 2021

Forecast Discussion

Two waves of thunderstorms will sweep across Southern Ontario on Tuesday with the first round coming during the morning with some isolated non-severe thunderstorms for Central, Southwestern and Eastern Ontario. Later in the day on Tuesday, there is a questionable risk of some pop-up thunderstorms during the afternoon and early evening mainly through Southwestern Ontario and parts of Central/Eastern Ontario. The storms in Southwestern Ontario have the potential to become severe with large hail, damaging wind gusts and heavy rainfall. Now, this isn’t guaranteed and is heavily dependent on if storms actually develop to take advantage of the environment. Storms will weaken late in the evening as they move out of the region.