Risks of thunderstorms and strong winds are expected in Toronto throughout the day.
Environment Canada is calling for rainfall between 10 to 20 mm and wind gusts of 60 to 80 km/h.
The special weather statement said the city's frozen ground has a reduced ability to absorb the rain and that localized flooding in low-lying areas and water pooling on roads is possible.
"South to southwest winds will strengthen ahead of the passage of a cold front this afternoon," the statement said.
The weather agency warned of loose objects that could be tossed by the wind, causing injuries or damage. Utility outages may also occur.
Environment Canada said these weather conditions are expected to last throughout the afternoon.
Daytime temperatures are supposed to reach 15 C, while nighttime could see -2 C and flurries.