From Wiki:
Terminal velocity of hail, or the speed at which hail is falling when it strikes the ground, varies by the diameter of the hail stones. A hail stone the size of 8 centimetres (3.1 in) in diameter fall at a rate of 48 metres per second (110 mph).
WOW. That means that the updrafts are 110mph+...probably much more + !! Thats SOME energy!
Some describe the appearance of the larger of these super cell thunderstorms as a mushroom cloud of an atomic explosion. But if they knew the energy involved, they’d know how close their description really is.