Nation in for a soaking as massive rainband heads east

Falls are forecast across most of the country in coming days as a massive rainband moves east. (Richard Wainwright/AAP PHOTOS)

A massive weather system stretching 4000km is expected to bring rain to 80 per cent of the country as it moves from the west to the east coast.

Pools of cold, unstable air from the northwest fuelled by tropical moisture should deliver falls to every state and territory during the next week, Weatherzone says.