« Back to Glossary IndexThe sound caused by a lightning stroke as it heats the air and causes it to rapidly expand.Related Articles:Squall Line through Sydney with Hail 13th October 2014Significant rain / floods and storm events - 6 to 15 March 2023 - New South Wales and QueenslandHeavy rain and storms drench New South Wales - 21 to 24 September 2022The summer of 2022 / 2023 and Windsor Bridge - One year after the devastating March floodsFirst storms for summer season 2020/21 - 12 and 15 October Western Sydney« Back to Glossary Index