Very cold temperatures and a bit of wind have conspired over night to bring bitterly cold wind chills to Iowa this Friday. The featured chart presents the reported wind chill against the air temperature during hours which the wind speed was measurable. Histograms of each are presented at the side and top. -20°F is roughly an observed threshold of wind chill where frequencies start declining at colder temperatures. Of course, the most extreme values are even more rare and often do not happen every year.

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Tags:   windchill   winter  

Tags:   windchill   winter