A week after enduring scorching temperatures, the Carnarvon region may be impacted by a category one cyclone in the coming days.
Heavy rain continues to lash WA's far northwest as the ex-cyclone slowly moves off the Kimberley coast on Wednesday.
The system is set to strengthen offshore and form a cyclone again by Friday before tracking back toward the WA coast west of Onslow on the weekend.
"It is very much a whiplash in terms of the shift in conditions compared to what we saw last weekend," a Bureau of Meteorology spokesperson told AAP.
"Carnarvon got to 49.9C on Sunday and they are looking at a low end category one system moving past them this weekend."
Ex-cyclone Lincoln has a chance of strengthening into a category two system early on Saturday, the bureau warned.
However the system is set to weaken before it impacts the WA's far northwest coast, losing more strength as it moves over land.
A severe weather warning has been cancelled for Kimberley's northern regions after copping heavy rain, with widespread falls of 90 to 150mm predicted.
In the past 24 hours 120mm has been recorded at Halls Creek airport and 71mm at Lombadina air strip north of Broome.
Cyclone Lincoln initially crossed the Northern Territory coast near Borroloola last Friday and weakened as it moved inland across central NT toward WA.
The bureau said heavy rain was now contained in WA in the wake of Lincoln, with storms clearing and no current severe weather warnings in NT and northwest Queensland.
A widespread flood watch has been issued across northern Australia from northwest Queensland across NT to north of Broome in WA.
There are major flood warnings for the Nicholson and Flinders Rivers in Queensland's northwest, with some regions still reeling from Cyclone Kirrily's impact weeks ago.
The bureau said recent monsoon rain had lifted the wet season rainfall to average totals in NT's Top End, with 100 to 300mm recorded over nine days in some regions.
Darwin Airport has recorded 1206.2mm for the wet season to date which is near its October to February average, the bureau said.