Cyclone Trevor Lashes North Queensland, Downgraded To Category Two

Tropical cyclone Trevor has caused chaos in some north Queensland communities as it barrels towards the Northern Territory.

Communities were in lockdown on Tuesday and roads and schools closed as the category three tropical storm made landfall just south of Lockhart River.

Hundreds of people there had braced for 220km/h winds and emergency services crews were on the ground at towns in the storm's path.

More than three hours after the storm reached the coast about 5pm on Tuesday, it still hadn't fully crossed the coast, a Bureau of Meteorology spokesman told AAP.

The cyclone is expected to cause high tides along the coast north of Port Douglas and dump hundreds of millimetres of rain.

Warnings are in place for Orford Ness to Cape Flattery, extending across the Cape York Peninsula to Pormpuraaw and Mapoon, including Weipa and Coen.

Additional emergency crews, including specialist swift water rescue firefighters, have already been deployed to the region.

The storm is expected to weaken to a category one system as it crosses the Cape York Peninsula before re-intensifying on its way towards the Northern Territory.

Formerly a Category 3 cyclone, Trevor weakened in the early hours of Wednesday morning and was downgraded to a Category 2.