TORONTO — More rain, more storms and more floods may be coming to southern Ontario soon, University of Saskatchewan geography professor John Pomeroy says. Pomeroy said unusually warm temperatures in the Great Lakes are driving more water vapor into the atmosphere than normal. The Toronto Star notes Toronto receives, on average, 72 millimetres of rainfall every May. That means if the cold part becomes warmer, moisture moves through the jet stream more slowly. Because the Arctic has been heating up incredibly quickly, Pomeroy said, jet stream pressure has dropped.

Source: National Post May 31, 2017 05:03 UTC