"Thunderhead" Quotes from Famous Books
 ... of warm air going up in a thunderhead cloud," he said, "which takes a spinning motion from the general whirl of the cyclone to which it belongs. It has a whirling vortex, from the outside to the inside, and its speed gets higher toward the middle. The speed of the inside of a tornado has never been figured out, but it has been ...
— The Boy with the U. S. Weather Men • Francis William Rolt-Wheeler |
