A cyclone warning has been issued for coastal and island areas in WA's north Kimberley region from Kuri Bay to the Northern Territory border.
At 8pm (WST) a tropical low was 350km north northeast of Wyndham and 335km northeast of Kalumburu and moving southwest at seven km/h, the Bureau of Meteorology said.
It said the low is expected to continue on a southwesterly track and develop into a tropical cyclone as it nears the north Kimberley coast late on Saturday.
Gales with gusts to 110km/h are expected to develop between Wyndham and Kuri Bay late on Saturday and may extend inland to Kununurra if the cyclone takes a more southerly track.
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The gales may extend further west to Cape Leveque on Sunday, the bureau said.
A cyclone watch is in place for the area from Kuri Bay to Cape Leveque, not including Derby.
Heavy rain is expected to cause flooding in the north Kimberley region on Saturday and Sunday.
