Tuesday, January 17, 2017

Mixed precipitation followed by warmer weather

Just some of the widespread damage from a weekend of freezing rain, power outages and accidents over Kansas and Oklahoma. The storm is now moving into southern Ontario and Quebec. (Weather Nation Photo)
Low pressure, responsible for a significant ice storm across the US plains and Midwest this past weekend, will move down the St. Lawrence Valley on Wednesday. The system will be weakening as it does so, transferring its energy to a second storm center developing off the New England coast. The coastal storm will move into Atlantic Canada through Thursday.

The result will be a swath of light-to-moderate precipitation, currently falling over southwest Ontario, advancing into southern Quebec by Tuesday evening. Additional snow from the coastal low will be pushed northwest into Vermont and northern New York. Slightly colder air will remain in Montreal as a result of northeast winds caused by the coastal low. Montreal, and southern Quebec can expect 5 to 10cm of mixed snow and sleet from this evening into early Wednesday morning. Travel will be affected, as roads become snow-covered and slippery. Freezing rain warnings are in effect in Ontario, between Kemptville and Kingston, for 2 to 5mm of ice accretion today. Warnings are also in place for portions of the Adirondacks and Green Mountains for heavier snow tonight. Temperatures will remain below freezing today in Montreal, before a notable warming trend starts on Wednesday. The balance of the week will feature well above-normal temperatures for Montreal.

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