Tasmanian school group evacuated from Dove Lake

Emergency services found the group and a man from the United Kingdom at Dove Lake.

Tasmania Police said all the walkers were safe.

Dangerous conditions in the national park continue to hamper search and rescue efforts, with no sign of the wet, snowy weather easing.

Three police search and rescue teams, the Westpac Rescue Helicopter, a police marine vessel and a team of SES volunteers, are searching for the 57-year-old Victorian man.

Tasmania Police Inspector Darren Hopkins said anyone planning a trip into Tasmanian alpine conditions should be aware of the forecast and unpredictability in weather conditions.

"They should be experienced bushwalkers and have the right equipment," he said.

Tasmania Police is advising motorists travel with caution on Tuesday due to slippery conditions on the Highland Lakes Road, Lake St Clair Road and Lyell Highway.

Lake Dobson Road and Marlborough Road are open, but motorists should use extreme caution if travelling on the roads.

Poatina Road is also open, but ice patches are possible so extreme caution should be used.

Scotts Peak Road in the state's south-west is only accessible by four-wheel drives.

Pinnacle Road, Mount Wellington is closed at The Springs.