Modification of tropical storms or hurricanes by mixing the upper layer of a section of a body of water with water from a lower section of the body of water. Rapidly mixing the warmer upper layer with the cooler lower layer cools the surface of the water, thereby reducing the amount of heat energy available to fuel the intensity and movement of storms. By cooling selected sections of water, the frequency, intensity or direction of storms may be altered. In one embodiment of the invention, a bluff shaped object is attached to a submarine to facilitate rapid mixing of the upper and lower layers of the body of water.
