Why do supercell thunderstorms form and what makes them so dangerous?

Who is covering this

1. ABC News (Australia) Center Factuality: Very high AU 1 hour ago
   Why do supercell thunderstorms form and what makes them so dangerous?

   More than 80,000 households were left without power after south-east Queensland thunderstorms downed more than 400 powerlines.

2. The Sydney Morning Herald Leans left Factuality: High AU 1 day ago
   Thunderstorms batter south-east Queensland

   More than 70,000 homes in south-east Queensland are without power today, after severe thunderstorms hit the region.