Storms were so heavy in some places that they dumped more rain in 10 minutes that accumulated during the last two weeks.

One storm in the Lower Derwent brought 27 millimetres of rain to Tunnack including 13mm in just 10 minutes.

That 10-minute period was wetter than the last 15 days out together.

The 27mm picked up in about half an hour made today its wettest 24-hour period in two months and wettest 24-hour period in November in more than 12 years.

Storms elsewhere in Tasmania were also heavy in the Launceston area where the airport gained 27mm, including 15mm in just 10 minutes.

This 27mm is the airport's highest daily total in eight months.

These storms are due to a low pressure system which had formed over the state.

The low is moving slowly east and is being replaced by a high which will clear today.