Updated 6 a.m. on Tuesday, February 22
Environment Canada has put a freezing rain warning into effect for Grey County, southern areas of Bruce County, and northern areas of Wellington.
"Snow is expected to develop tonight and change over to freezing rain or ice pellets by Tuesday morning. Freezing rain, occasionally mixed with ice pellets, is expected to continue through to Tuesday night," the weather agency said in a statement.
The exact amounts of rain, snow, and ice aren't clear, but Environment Canada said that the accumulation of ice could be significant.
"Difficult travel conditions and power outages are possible," the statement read.
Motorists and pedestrians are advised to watch for slippery surfaces and to "beware of branches or electrical wires that could break under the weight of ice."
There is also a special weather statement in effect for Huron and Perth as 15 to 20 mm of rain is expected.
Temperatures are expected to reach at least 7 degrees Tuesday, and as high as 12. But they will stay around the freezing point through the early morning.
--with files from Steve Sabourin