Wednesday, March 09, 2011

Snowfall Warning

Winter Storm Warnings have been extended into southern Quebec including metro Montreal for 15-25cm of wet snow overnight and into the middle part of Thursday. The snow has already started in Montreal with a coating to 1cm down in the last hour. Radar is showing bands of precipitation moving into the region from Ontario. Strong low pressure over the Ohio Valley with a warm front extending to the northeast will move towards Montreal. Heavy snow tonight will mix with and change to rain on Thursday, with a risk of freezing rain as well. Winds are gusting between 20-40km/h and will increase overnight. Travel will be difficult throughout the night into the morning commute.

Warnings are in effect for southern Quebec from Montreal north into the Laurentians as well as the Ottawa Valley and eastern Ontario. Winter Weather Advisories are posted for upstate New York and northern Vermont for mixed precipitation. Once the wet snow changes to rain, expect over 15mm of rain with flooding possible.

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