Question

how does lightining occur during a storm?

Answer 1

Heavier, negatively charged particles sink to the bottom of the cloud. When the positive and negative charges grow large enough, a giant spark - lightning -occurs between the two charges within the cloud. This is like a static electricity sparks you see, but much bigger.

Answer 2

During strom when positively charged and negatively charged clouds collapse a thunder sound is generated with a sparkle which we called lightning
Hope it help u