The latest track map shows the eye of Tropical Cyclone Narelle will begin moving over Carnarvon as a category 2 system later this evening.
It means the cyclone has officially been downgraded from a category 3 storm.
It is currently 55 kilometres northeast of Carnarvon, and is moving quickly to the south-southeast where it is expected to weaken further.
The Bureau of Meteorology said Narelle will still likely pack a punch with destructive wind and significant rainfall, and gusts near its centre are expected to reach 125km/hr by the time it gets to Carnarvon.
The Shire of Carnarvon has issued a warning to all residents to stay inside as the town switches onto red alert.
The warning is also active for anyone south of Exmouth to Jurien Bay, including Exmouth, Coral Bay, Carnarvon, Denham and Geraldton, and extending inland to Murchison and Dalwallinu.