Messy weather is expected overnight and Tuesday morning in southwestern Ontario.
Environment Canada meteorologist Geoff Coulson says a system is moving in from the prairies will bring wet snow and the chance of some freezing rain.
Coulson says some snow could also accumulate on the ground before the temperature starts to warm up through the morning.
5 cm (2 in) is forecast for Sarnia-Lambton.
On a positive note, mild weather is forecast for mid-week including a high of 15 C (59 F) Thursday.