Western Australia's northwest is on notice after Tropical Cyclone Narelle reformed into a category one system, generating wind gusts up to 100km/h.
Narelle is forecast to become a severe category three system - which can generate gusts of up to 224km/h - by early Thursday, with gales possibly extending to the WA coast.
The system had become a tropical low after making landfall at the Northern Territory on the weekend, forcing hundreds to evacuate from floodwaters.
Its impact is still being felt after catchments became swollen in the NT's big rivers region, with Katherine, south of Darwin, bracing for a major flood level peak that threatens to inundate homes a second time this month.
Narelle had reformed and was a category one system moving away from WA's Kimberley coast, the Bureau of Meteorology said on Wednesday morning.
A cyclone warning has been issued for Cape Leveque to south of Beagle Bay, and Bidyadanga to Mardie, including Port Hedland and Karratha.
A watch zone from Mardie to Cape Cuvier, including Onslow, Exmouth and Coral Bay is current in WA's northwest coast.
Narelle is off Broome travelling west at 23km/h, threatening to trigger isolated heavy rainfall that may lead to flash flooding across parts of the north and west Kimberley on Wednesday.
Destructive wind gusts to 140km/h could develop on the Pilbara coast near Karratha late on Wednesday or early Thursday, extending to Exmouth during Thursday, and to Coral Bay by early Friday.
Narelle is predicted to turn south later on Thursday, passing close to the North West Cape, with impacts extending to the inland western Pilbara and along the Ningaloo coast.
The system is then forecast to move southeast during Friday and Saturday, with impacts extending along the Gascoyne coast and expected as far south as WA's lower west on the weekend.
There is an outside possibility of a rare crossing as far south as Perth, which has been warned of heavy rainfall this weekend.
The cyclone first made landfall on March 20 in far north Queensland before impacting the NT where residents are still coping with its aftermath.
Katherine residents are waiting on an expected major flood level peak later on Wednesday.
They are still reeling from a tropical low earlier this month that sparked the worst flooding in almost 30 years, with some locals losing everything.
Mayor Joanna Holden told AAP residents were hoping the level would not go anywhere near the 19.2 metre peak reached on March 7, when many homes and businesses were flooded.
Katherine residents says they are bettered prepared after a major sandbagging operation shored up the town's flood defences.
28°C