Environment Canada has issued a Special Weather Statement for several regions in Southern Ontario including the Kitchener-Waterloo region through Brant County, Hamilton, Halton-Peel, and down by Simcoe and to the Niagara Region.
Many of the Statements read as follows;
Risk of freezing rain Saturday night followed by 15 to 25 mm of rain. Gusty winds Sunday.
Rain will begin late Saturday evening or after midnight. In areas where temperatures remain below the freezing mark, this precipitation could fall briefly as freezing rain before temperatures rise above zero.
Rainfall amounts of 15 to 25 mm are expected before the rain tapers off late Sunday morning or early Sunday afternoon.
Ponding of water on streets with blocked storm drains and in low lying areas is possible.
In addition, southwest winds gusting to 70 or 80 km/h will develop on Sunday and continue for much of the day.
The rain and wind are associated with a Colorado Low that will track through Northeastern Ontario on Sunday.
There are a few exceptions, however, where there is no mention of the Risk of Freezing Rain; which you will find along the shores of Lake Erie including Simcoe, Norfolk, Caledonia, Haldimand and Niagara.
This could be upgraded to a Freezing Rain or a Rainfall warning at a later date and if it is you will find updates given from Environment Canada.
Image and Information from Environment Canada.