Several severe warned storms that day, there were cells in abundance and quite frankly it was a headache keeping up with all of them so we picked the largest ones and stuck with those, as we were making our way back towards St. Thomas, Ontario my chase partner noticed this huge shelf cloud, but something was different about this one cause instead of gliding it was rolling and sure enough the shelf turned into a full roll cloud, rolling in on itself and continuing down towards the area we were heading.
