Environment Canada is advising of the possibility of some freezing rain Wednesday.
A special weather statement has been issued for Sarnia-Lambton as well as London-Middlesex and Chatham-Kent.
The national weather agency says some patchy light freezing rain may affect the region later this morning or early this afternoon.
Impacts are expected to be minimal with little or no ice accumulation expected. Temperatures will quickly rise above the freezing mark by early afternoon ending the threat of freezing rain.