Environment Canada calls for 15 to 25 mm of rain tonight into Sunday morning along with gusty winds.
Rain will begin this evening and taper off Sunday morning. The rain may fall heavily at times tonight with a risk of thunderstorms, particularly over Southwestern Ontario.
Rainfall amounts of 15 to 25 mm are expected by late Sunday morning, although some areas may see higher amounts.
Ponding of water on streets with blocked storm drains and in low lying areas is possible.
In addition, a Wind Warning is in effect for Niagara Falls, Welland, and South Niagara.
Very strong southwest winds with occasional gusts to 90 km/h are expected to develop by Sunday afternoon.
The rain and wind are associated with a Colorado Low that will track through Northeastern Ontario on Sunday.