Cyclone Trevor moves inland through Australia's Northern Territory

Cyclone Trevor moves inland through Australia's Northern Territory

The system, the size of the state of Victoria, crossed the mainland as a category four storm on Sunday morning, producing wind gusts of 230km/h around the NT's border with Queensland.

But it was expected to weaken as it tracks inland on Sunday and would be a tropical low when it reaches Tennant Creek, about 1000 kilometres south of Darwin.

That could bring up to 200mm of rain per day, according to the Bureau of Meteorology, which has issued a flood watch for the drought-hit regions and rivers around the Carpentaria coast.