Toronto, GTA face another winter storm with snow expected Sunday.

A winter storm warning is in effect for Toronto and the GTA, with Environment Canada forecasting 15 to 30 cm of snow starting early Sunday and gusty winds possible.

A winter storm warning is in effect for Toronto and much of the Greater Toronto Area ahead of snow expected on Sunday. Environment Canada says a band of lake-effect snow will develop early Sunday morning and could bring 15 to 30 centimetres in parts of the city. Strong easterly winds and gusts up to 50 km/h are possible, and lake enhancement is expected to shift southward toward Oakville and Burlington later Sunday. The region has been experiencing bitter cold, with a wind chill of about -28 recorded at Toronto Pearson earlier in the week. Key details: - A winter storm warning is active; Environment Canada forecasts 15 to 30 cm of snow beginning early Sunday with lake-effect enhancement in some areas. - Strong winds with gusts up to 50 km/h are possible, and shifting wind directions may move heavier lake-enhanced snow toward Oakville and Burlington later Sunday. - A yellow cold warning was lifted; a wind chill of -28 was reported at Toronto Pearson Airport on Friday night. - A winter weather advisory notes travel may become hazardous and that local airport operations could be affected. - A power outage in Hamilton initially affected about 635 homes and businesses and later grew to about 935; crews reported an estimated restoration between 2 p.m. and 4 p.m. - The City of Toronto has warming centres and surge sites open at several addresses, and officials have highlighted local response measures. Summary: Environment Canada warns that 15 to 30 cm of snow with gusty winds and localized lake enhancement is expected across parts of the GTA on Sunday. Current impacts include a Hamilton power outage with an estimated restoration window of 2 p.m. to 4 p.m., and warming centres and surge sites open in Toronto. Further changes in snow distribution are expected through Sunday as winds shift and lake enhancement moves southward.