The search for a man missing in the Mount Holdsworth area has entered its fourth day.
Michael MacGregor was last seen at the Rocky Lookout at 12.20pm on Monday, wearing shorts and a hoodie.
Despite challenging weather conditions, the Westpac Rescue Helicopter with thermal imaging has been deployed and a drone may be used, if conditions allow.
Severe gales are forecast for Wellington and Wairarapa as a strong and cold southwest flow sweeps over the country.
Temperatures in the North Island plunged to freezing overnight, and snow fell on the Desert Road and in the Rimutaka Ranges