can i ask a question about the storm aura effects for the storm herald barbarian in xanathar’s?💖 go for it!

— Mike Mearls (@mikemearls) May 25, 2018

few parts to this question.
1-if they are in my aura when i activate it per round, they get temp HP. if they move out of my aura, does the temp HP stay? or is it only good for when they are in the 10 ft radius?
2-if it stays when they move out of the aura, how long does it last? pic.twitter.com/lOaEdMI4pF

— real live ghost👻 (@ayoungghost) May 25, 2018

1. Temp hit points remain
2. Until they are depleted or you take a long rest

— Mike Mearls (@mikemearls) May 25, 2018