JJ Enhancement

The JJ curve is used to highlight both sea surface temperatures, and cold cloud tops associated
with thunderstorms and other weather systems.   Maximum enhancement is provided at the
warm end (23 to 0C) to depict sea surface temperatures and low clouds.  The presence of a
freezing level break point is important for aviation users interested in icing conditions.  Multiple,
steep, ramp enhancement ranges provide considerable detail within cold cloud tops such as
thunderstorms, but it is difficult to determine the actual temperatures with any accuracy.