A beautiful fall weekend in Sarnia-Lambton will give way to a sudden change to winter conditions as the month of December arrives.
In a special weather statement issued Sunday, Environment Canada said a significant winter storm is expected Monday into Wednesday that will bring rain, snow and strong winds across southern Ontario.
Precipitation is expected to begin Monday morning mainly as rain but may be mixed with snow at times. Rain is then expected to change to snow Monday afternoon or evening with snow continuing into Wednesday. Snowfall amounts near five centimetres to 10 centimetres (2 to 4 inches) are possible by Tuesday morning. Additional snowfall amounts Tuesday are fairly uncertain at this time, but total amounts near 15 centimetres (6 inches) are possible.
Strong northwesterly winds gusting near 70 kilometres an hour are also possible Monday night and Tuesday near Lake Huron.
Difficult travel conditions are expected as roads possibly become snow covered and icy, particularly Monday night into Tuesday. Several transitions between rain and snow are possible throughout the weather event.
Precipitation associated with the low pressure system is expected to move east of the area Wednesday.