Storms to dump heavy rain and hail across Ontario Wednesday
While the ingredients are coming together for Wednesday for very strong thunderstorms widespread across northeastern Ontario and also across the southwest as atmospheric energy bills and that cold front slices through a very hot humid air mass. With those storms, there will be the potential for localized flooding, pooling and ponding as we continue through Wednesday afternoon and evening. Now the risk for thunderstorms is quite widespread and the primary threats will be large hail and heavy rain. That risk is there through northeastern Ontario, through the shores of Lake Huron in the southwest of Ontario. And we can't rule out supercell thunderstorms. Those are the rotating storms and they can bring some heavy rainfall as well as large hail. And you see there as we continue through Wednesday morning, not only across northeastern Ontario where we've got widespread heavy rainfall potential, but we see the instability and those storm signatures bubbling up across southern Ontario, including the Greater Toronto Area as we continue through. Wednesday from around the noon hour through the afternoon and into the evening hours. By the time we head through Wednesday night, that thunderstorm risk pushes toward the Ottawa Valley.