Cold wave n. (Meteor.) In the terminology of the United States Weather Bureau, an unusual fall in temperature, to or below the freezing point, exceeding 16° in twenty-four hours or 20° in thirty-six hours, independent of the diurnal range.
... THE cold wave that was ushered in that December morning was the beginning of a long series of days that vied with each other as to which could induce the mercury to drop the lowest. The descent of the temperature seemed to have a like effect on the barrel of potatoes and the load of coal ... — Mrs. Wiggs of the Cabbage Patch • Alice Caldwell Hegan
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