A blue alert remains in place for Severe Tropical Cyclone Narelle which is about 760 kms north of Karratha.
The alert is current for communities between Whim Creek and Mardie, including Karratha, Dampier, Roebourne, Point Samson and Wickham.
Blue alert indicates people should prepare their homes and themselves now for dangerous weather.
The Bureau of Meteorology's James Lannan says the category three system is expected to continue to develop as it tracks south-south-west towards the North West Cape.
The system is expected to slowly intensify over today and tonight and we are looking at gales starting to be in the area west of Whim Creek anywhere from Friday afternoon, he said.
A cyclone watch is also in place for people in or near the coastal communities from Mardie to Coral Bay.
In the Gascoyne, Carnarvon mango producer Eddie Smith has told the Rural Report he is frantically picking his fruit before any extreme weather hits.
"We are flat out trying to get as many off as we can because if they don't get blown off by the wind we won't get to pick them," he said.
"I've just checked the weather and it looks like we are going to get a fair amount of rain so that will hold up the harvest."
© ABC 2013
10:45 EDT El Nino is one extreme of the El Nino-Southern Oscillation (ENSO) phenomena, in which La Nina is its counterpart.