Weather 101: What is Cap??

Chief Meteorologist Paul Williams is describing a commonly referred to term call 'capping' of a storm. For clarity: n meteorology, a 'cap' (formally known as a capping inversion or Convective Inhibition/CIN) refers to a layer of relatively warm, stable air aloft (typically several thousand feet above the surface) that acts as a "lid" to suppress or delay the vertical development of thunderstorms. Here's a simple way to look at it...