It's official - Tropical Cyclone Marcia has been downgraded to a Category 1 system.

The system is now about 65 kilometres south-west of Gladston and 40 kilometres east north-east of Biloela and moving south south-east at 18km/h.

If you in or around Biloela, take care over the next few hours.

The south-east can expect a lot of wind and rain tomorrow, but it's likely to be coming from an ex-cyclone by then.