Snow, Cold Target Northern Plains, Canadian Prairies

By Matt Alto, Meteorologist
November 22, 2012; 6:10 AM ET
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The last system in the train of storms that clobbered the Northwest will spread a swath of accumulating snow from the northern Rockies to northwestwen Ontario into Thursday (Thanksgiving) night.

Enough snow will fall to make roads slippery from northern Idaho to northern Minnesota, northern Wisconsin, part of Upper Michigan and neighboring Canada.

Portions of I-29 and I-94 in the United States will be affected, as well as a long stretch of Canada's Highway 1.

Up to half a foot of snow (15 cm) will fall on portions of northwestern Wyoming and from southern Saskatchewan to north of Lake Superior.

The snow precedes a push of colder air that will continue over the region through the long Thanksgiving weekend in the United States.

Temperatures will be slashed by 20 degrees Fahrenheit (10 degrees Celsius) compared to highs earlier this week.

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