Deteriorating weather is heightening concerns for a missing tourist in Nelson Lakes National Park.
Nelson Bays Police are appealing for sightings of 41-year-old British tourist Andrew Ian Wyatt, overdue on the Te Araroa Trail between Nelson Lakes and Boyle River.
Police are today tracing Mr Wyatt's bank and telephone records to try to eliminate the possibility he has left the area and is unaware of the concerns for his welfare.
A helicopter crew spent three hours yesterday visiting all of the huts in the area, but found no sign of Mr Wyatt, said Search and Rescue Coordinator Senior Constable Gerry Tonkin.
He said police were hopeful Mr Wyatt had changed his intentions and left the area.