Environment Canada issued snow squall watches and warnings early Wednesday morning.

A snow squall warning is in effect for Huron, Perth, Grey and Bruce Counties.

A snow squall watch has been issued for Middlesex, Oxford, Waterloo and Wellington Counties.

Most, if not all school buses in the Bluewater District School Board were cancelled, as were buses serving the Huron Perth area. For Huron Perth cancellations, click here.

School buses in the Medway Valley zone of Middlesex County were delayed two hours.

Highway 21 from Southampton to Goderich, and Highway 9 from Kincardine to Walkerton were closed earlier in the day.