A red alert has been issued for areas south of Broome to the Aboriginal community of Bidyadanga in the Kimberley, with people urged to take shelter and stay away from doors and windows.
"There is a threat to lives and homes. You are in danger and need to act immediately," the alert from Emergency WA states.
There is also a yellow alert to prepare to take shelter for areas south of Bidyadanga to Wallal.
It is the region's second cyclone in a fortnight after Tropical Cyclone Hilda hit the Broome area.
Joyce was declared a category one cyclone on Thursday morning with winds of 65kmh, and had been forecast to grow to a far more dangerous category three on Friday with winds up to 180kmh.
But the Bureau of Meteorology now says Joyce is expected to cross the Kimberley coast as a category one cyclone.
"It's passed Bidyadanga, but sitting near the coast it means that it hasn't strengthened overnight," forecaster Craig Earl-Spurr told the ABC.
"So the good thing about it getting to the coast a bit sooner is that it has less time to develop and we don't expect to see any impacts greater than a category one".
DFES advises residents in affected areas to:
- Fasten all cyclone screens, secure boats, caravans, trailers, garden sheds, outdoor furniture, rainwater tanks and LPG bottles.
- Move vehicles under cover.
- Ensure pets and animals are in a safe area.
- Pack a relocation kit to be taken with your emergency kit.
- Be aware that shops may now be closing.
Residents can also head to the Broome Recreation and Aquatic Centre, which has been set up as an evacuation centre.
Video of the storm in the lead up to Joyce:
Communities are urged to prepare for dangerous weather and keep up to date.
An all-clear has been issued for people in or near Cockatoo Island, Cape Leveque and Derby as the threat has passed, however, people are advised to take care on the road and not drive, swim or walk in water of unknown depth and current.
- For SES assistance call 132 500
- In a life-threatening situation call 000
- For the latest weather information call 1300 659 210 or visit www.bom.gov.au
- For information about road conditions and closures contact local Police or Main Roads WA on 138 138.
Visit www.emergency.wa.gov.au, call 13 DFES (13 3337), follow DFES on Twitter: https://twitter.com/dfes_wa, Facebook: https://facebook.com/dfeswa/, listen to ABC Local Radio or listen to news bulletins. Updates will be provided when the situation changes