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An arctic chill will slam the northern Plains over the next couple of days with subzero temperatures. The core of the coldest air will be across North Dakota and Minnesota, where daytime highs will be in the single digits and overnight lows could reach as low as minus 25 degrees.

Typical high temperatures this time of year are in the low to middle 20s, but with an arctic boundary pushing across the region, temperatures will be 20-25 degrees below normal. Friday will be the coldest of the next two days with highs in northern North Dakota and northwestern Minnesota below zero.

Nights will be frigid with furnaces getting a workout. Temperatures will be 10-20 degrees below normal for overnight lows. When normal lows are in the single digits to begin with, anything below normal is bitterly cold.

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