Tropical Cyclone Ilsa is weakening as the system moves east across Western Australia, however remains a severe weather system.
Parts of the Northern Territory will be impacted from Saturday, with the system expected to move into the Territory near Kintore as a Tropical Low tomorrow morning.
Southern Regional Controller, Acting Assistant Commissioner Kylie Anderson said, "Ex Tropical Cyclone Ilsa will bring high winds and heavy rainfall to parts of the Lasseter, Simpson and Southern Tanami regions."
People in the projected area, which reaches from the Western Australia border, south to Yulara, north to Ti Tree and east to Jervois are urged to be prepared for the possibility of gale force winds and up to 100mm of rainfall on Saturday.
"While the system will continue to weaken as it tracks east, conditions will be dangerous. Rivers and crossings can rise quickly. Do not enter floodwaters - do no drive across flooded crossings or play in stormwater. Roads will be slippery - slow down, turn your lights on and drive to conditions.
"Residents should clear their yards of loose objects and reconsider any need to travel on Saturday."
The weather system is not expected to impact ongoing recovery works around Kalkarindji, Dagaragu and Pigeon Hole.