A heavy rainfall warning has ended for Toronto but Environment Canada predicts most of southern Ontario will still feel the wrath of tropical depression Ike.

Isolated thunderstorms, gusty winds and heavy downpours are predicted to pummel the Greater Toronto Area Sunday evening. Durham and York regions are still under a heavy rainfall warning, as are Halton, Peel, Peterborough and other regions.

Most of these areas could see as much as 50 millimetres of rain, the national weather agency said.

In Toronto, the storm is expected to end by midnight but not before leaving between 15 and 25 millimetres of rain in its wake.

The storm is expected to move over eastern Ontario on Monday and up towards the north of the province on Tuesday.

"It's moving very quickly. It doesn't have time to spread its misery. It just hits and runs," Dave Phillips, senior climatologist with Environment Canada, told The Canadian Press on Sunday.

"It still has a punch but the fact is that it would be far worse if this thing was moving at the same (slow) speed that it hit (the southern U.S.)."

Ike, which has been downgraded from a hurricane to a tropical depression, is moving at a speed of 80 kilometres an hour and is heading across southern Illinois, Environment Canada said on its website Sunday afternoon.

Areas between Toronto and Ottawa will likely be affected by the storm. Areas could be hit with strong winds gusting at 60 kilometres to 80 kilometres an hour.

"The centre of Ike is moving across southern Illinois and will make a beeline across Lake Erie later this afternoon and near Toronto this evening then Ottawa around midnight," a statement on the national agency's website said.

Environment Canada says that the area between Sarnia and Petawawa may receive up to 80 millimetres of rain, although the overall amount may be limited because of Ike's speed through the region.

Phillips said Ike, though weakened, is still a powerful storm.

"It's still a potent system," he said. "It's very, very moist huge and it's quite huge."

Phillips warned areas like Hamilton, Ont., which has seen about a month's worth of rain in the first two weeks of September, could see some flooding.

The storm is expected to create difficult driving conditions. On Saturday, a mixture of strong winds and heavy rains toppled some trees in the Bathurst Street and Lawrence Avenue neighbourhood.