After entering the Northwest Territories, we encountered very high temperatures (certainly for this area in mid-August) and then a huge rain storm with pancake-size raindrops, sustained fork lightning and high winds. It was quite a display.
I tried to get a picture of a lightening fork, but missed on all my attempts.
My understanding is that the prairies and southern Northwest Territories are going to get a series of hot days followed by these intense storms, some of which may contain hail or may become tornadoes. Fingers crossed, we skip those.