A trough in the east is generating thunderstorms in the tropics and southeastern NSW. Unstable air behind a front is producing showers in VIC and TAS. A high over the Bight is keeping SA clear. A trough in WA is causing thundery showers in the Pilbara and Kimberley.
04:14 EDT It's not easy to get a sense of just how powerful a typhoon, cyclone or tornado will be.