One of the all time greatest temperature changes in the history of the world occurred on this date 65 years ago and it took place in the United States. Chinook winds during the early morning hours caused the temperature at Spearfish, South Dakota to rise from 4 below zero to 45 above in just two minutes. An hour and a half later the mercury plunged from 54 above to 4 below zero in twenty-seven minutes.
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