After receiving a coating of ice last week, another dose of mixed precipitation is on the way for Sarnia-Lambton.
Environment Canada has issued a freezing rain warning as a Colorado low approaches.
The weather agency said precipitation will begin as snow overnight on Monday, changing to ice pellets, and then freezing rain. Snow and ice pellet accumulation ranging from four to eight centimetres is expected on gusty east winds.
Forecasters said freezing rain is likely to continue for two to six hours before changing to rain Tuesday afternoon.
Surfaces such as highways, roads, walkways and parking lots may become icy and slippery. Motorists are urged to adjust their driving to changing road conditions.
Ice build-up may cause tree branches to break and power outages could occur.