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.
...cold wave of January 4th to 7th is believed to be greater than first reported. Growers tell me that Snyder blackberries are killed down to the frost line, which proves it is not iron-clad, as some believe. Accounts from the Cobden ... — Prairie Farmer, Vol. 56: No. 4, January 26, 1884 - A Weekly Journal for the Farm, Orchard and Fireside • Various
... 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