..Significant snow and blowing snow tonight and Sunday..

This is a warning that dangerous winter weather conditions are imminent or occurring in these regions. Monitor weather conditions..Listen for updated statements.

A low pressure system centred over Eastern Iowa is tracking east towards the lower Great Lakes and will intensify into a winter storm as it reaches Southern Ontario by Sunday night.

An expanding area of snow will reach Sault Ste Marie and Manitoulin areas by this evening then rapidly spread northeast into remaining regions tonight. As the low pressure system deepens, the snow is expected to become heavy at times Sunday and continue Sunday night into Monday as the low pressure centre moves north into Québec. A general snowfall of 20 to 30 cm is quite possible by Monday morning across most of the district.

In addition, strong and gusty northeasterly winds are expected to develop and these will whip up the freshly fallen snow resulting in blowing snow in exposed areas.

Travelling conditions are expected to deteriorate quickly tonight. Hazardous driving conditions from low to at times nil visibility in heavy snow and blowing snow are quite possible. Motorists should adjust travel plans accordingly.