The basic equations - Severe Convective Storms and Tornadoes: Observations and Dynamics - page 62

Figure 2.12. Idealized representations (left) and photographs of (right) convection: (top)
plume; (middle) thermal; (bottom) starting plume. (Top right) Narrow convective plume over
the Continental Divide in the Indian Peaks, CO, on August 6, 2010; actually, this example
might also be used as a starting plume; (middle right) conglomeration of thermals over eastern
Colorado, atop a developing supercell on June 6, 1990, as viewed from an aircraft; (bottom
right), pyrocumulus produced by a wildfire in central Oklahoma on September 1, 2011 with a
well-defined leading cap; the bottom of the plume is being advected to the left by low-level wind
(photographs by the author).