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Extreme Cold/Wind Chill in Southwest Big Horn Basin, Wyoming

Extreme Cold/Wind Chill January 5, 2017 – January 6, 2017 · Southwest Big Horn Basin, Wyoming

What the National Weather Service wrote

A weather station 9 miles northeast of Thermopolis recorded a low temperatures of minus 33 degrees.

The wider storm

A combination of an arctic air mass, a clear sky, a long early January night and a deep, fresh snow pack brought frigid temperatures to much of western and central Wyoming. Four different counties recorded low temperatures under minus 40, including a low of minus 45 East of Rock Springs. All eleven counties in the County Warning Area recorded a temperatures of -30 or lower on the night of January 5-6, 2017.

Source: NOAA Storm Events Database, event 669760. Narratives are written by the National Weather Service forecast office that issued the report.

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