The main road between Te Anau and Milford Sound has been blocked by avalanche debris periodically since last Wednesday and numerous times in the past two weeks due to avalanche control work.
The New Zealand Transport Agency (NZTA) arranged a convoy of vehicles to evacuate tourists from the resort last Saturday.
Southland area manager Peter Robertson said "quite a number" of avalanches had reached the road between the Hollyford turnoff and Milford Sound.
Downer EDI Works was working on clearing the debris, but that was expected to take at least two days and adverse weather was expected last night.
Real Journeys chief executive Dave Hawkey said no passenger boats were operating on Milford Sound but the company was offering alternatives to tourists, including trips to Doubtful Sound and on the Earnslaw.
He said the financial impact would not hit his business hard as tourist numbers were "reasonably small" at this time of year.
The Department of Conservation (Doc) yesterday warned back-country adventure-seekers there was also avalanche danger in Fiordland.
The avalanche risk has been high in the Queenstown and Wanaka backcountry areas for the past two weeks and Doc operations ranger Hamish Angus said some people might consider the Great Walks in Fiordland as benign areas - however, this was not the case, as the Milford, Routeburn and Kepler tracks all passed through a considerable number of active avalanche paths.
"In some cases, you may not even be walking in snow - the avalanche field can be 1200m above and can run [sweep down] without warning," he said.
Hunters and trampers were advised that caution should also be exercised in the Mavora Lakes, Snowdon Forest, Eyre Mountain and Takitimu areas, as these all had a heavy cover of unstable snow.
"Until snow conditions stabilise and the avalanche risk decreases, back-country adventurers are being strongly advised to seek out other alternatives in safe areas."
The Mountain Safety Council website www.avalanche.net.nz gives avalanche conditions for the main ski areas throughout the country, but does not include the Fiordland region.
Fiordland was a complex area due to its size and dynamic weather systems.
"Complacency can creep in over time with park users, but this year is currently one of the worst for a long time," he said.
This was due to instabilities established in the snow pack early in the winter and predicted snowfall over the next few days would not help the matter.
People planning a winter trip in Fiordland are being urged to contact the Fiordland National Park Visitor Centre to check thelatest avalanche conditions before setting out.
