This paper is a very brief summary of a special bulletin on the climate of the Cumberland and Tennessee basins, now being published by the Weather Bureau.The Cumberland and Tennessee basins lie between longitudes 81° 30′ and 88° 30′ In a general way they form a rough quadrilateral, with its greatest length about 400 miles from east to west. Also, they may be likened to concentric arcs, the Tennessee being the outer and southerly one, with a total area of 40,667 square miles. The Cumberland is much smaller; its total area is 17,880 square miles. Combined they are 29 percent of the area of the entire Ohio