Tornado warnings have ended for some parts of southern Ontario Friday, but high winds have left about 70,000 people without power in parts of the province.

Hydro One says customers in Georgian Bay, Hunstville, Muskoka, Hamilton and St. Catharines are reporting widespread outages.

In Toronto, heavy rain and winds played havoc with motorists after traffic lights were knocked out. As the storm passed, the temperature in the Toronto area dropped from 30 C to 19 C in 11 minutes.

The storm downed trees and power lines across southwestern Ontario as winds gusted to a peak of 95 km/h.

Temperatures began rebounding in Toronto as the severe thunderstorm warnings were dropped. The storm delayed many flights in and out of Pearson International Airport.

The eastbound GO Train from Union station to Pickering has been cancelled due to severe weather.

Earlier, Environment Canada said funnel clouds were spotted in the Brantford and Hamilton areas, but as of 5 p.m. had dissipated or moved out of St. Catharines, Hamilton and the northern Niagara region.

A tornado watch is still in effect for Peterborough, Kawartha Lakes, Bancroft, Haliburton, Renfrew and Pembroke.