I have a DJi Phantom 2 Vision.
I have successfully captured straight line wind events, storm fronts and have tried a couple times during tornadic events. You have to be in the right place to be in position to fly without getting it destroyed by hail or knocked out of the sky by winds, or worse, dragged into a tornado. Be very very careful. A drone can really hurt someone if hits someone, especially if it's more than 2kg.
IT is one of my goals to have footage of a tornado on the ground while my drone films it and will continue. The ones I have seen online seem to be from 7 miles away. Not what I wish to achieve.
I am an experienced drone pilot and will let you know when I have another one of those "lessons learned" moments. Safety is always paramount.