Sudden jump in a storm’s lightning might warn a supercell is forming

7 enero 2015

A sudden jump in the number of lightning strikes inside a garden-variety thunderstorm might soon give forecasters a new tool for predicting severe weather and issuing timely warnings, according to new research. The sudden increase in lightning is one sign a normal storm is rapidly evolving into a supercell, with a large rotating updraft — or mesocyclone — at its heart.