Environment Canada has issued a special weather statement for Sarnia-Lambton, advising of freezing rain in the forecast on Friday.
The national weather agency said freezing rain, initially mixed with rain or snow, will begin late in the afternoon or early evening.
We're being warned that a potential prolonged period of freezing rain could bring measurable ice accumulations to many areas.
It's expected to transition to rain or snow later Friday night.
Environment Canada said this precipitation is associated with a low pressure system moving north from Texas, and notes there's still some uncertainty with the exact track of the system as it approaches Lake Erie.
Freezing rain warnings are likely to be issued as the event draws closer.