« Back to Glossary IndexThe sound caused by a lightning stroke as it heats the air and causes it to rapidly expand.Related Articles:Snow and Cold NSW 11th to 12th July 2015NSW Northern Rivers Severe Storms 20th December 2011First storms for summer season 2020/21 - 12 and 15 October Western SydneyStorm chase Glenbrook 11 October 2015Spectacular Shelf Cloud Western Sydney 24th November 2014« Back to Glossary Index