At http://spaceweather.com/ (August 14th, 2015) … sprites on steroids were seen above hurricane Hilda, gigantic lets of lightning leaping into space. Go to the site where there is a video – it is quite short but was made privately and although it is up at Space Weather that is at the discretion of the video maker. You will enjoy watching it.
The video was taken by Steve Cullen who lives in Hawaii. The size of the jets is surprising. Sprites are lightning discharges in the direction of the ionosphere and regularly form during thunderstorms. The sprites above Hilda reach right up to the edge of space – which means they are a space weather phenomenon.