A Colorado low pressure system is expected to spread a large area of snow into northwestern Ontario beginning overnight and continuing Wednesday.

There is uncertainty as far as total snowfall amounts are concerned. However, latest indications suggest most areas will receive 5 to 10 cm of snow by Wednesday evening. Periods of snow will likely continue Wednesday night into Thursday with further accumulation possible.

Driving conditions are expected to deteriorate as the snow moves in. Motorists should be prepared for poor winter driving conditions on Wednesday and should consider allowing more time to reach their destination.

Environment Canada is closely monitoring this situation. Snowfall warnings may be required if the disturbance winds up being stronger than expected.