The intricacy of the parts of the Oklahoma thunderstorm in the sky of this painting. Jerry continues to work wet into wet to gradually build the darker areas of the clouds. Jerry refines all the edges with highlights working across with a dark gray color. Jerry demonstrates how to create the intermediate gray and the feathering the bands with x-strokes on the clouds in the sky. The extraordinary drama of this painting is accentuated with a touch of purple in the dark clouds and yellow in the bright highlight.