« Back to Glossary IndexThe sound caused by a lightning stroke as it heats the air and causes it to rapidly expand.Related Articles:Tamworth supercells 3rd December 2012Morning and afternoon storm - Western Sydney - Monday 21 February 2022Significant thunderstorm activity Western Sydney - 9/12/2021Squall Line through Sydney with Hail 13th October 2014Loud thunder to the NE and N of Schofields« Back to Glossary Index