The Imperial Forecasters were an organization within the Klingon Empire.
A part of the Klingon Strategic Operations Bureau, this body of military planners used advanced wargaming and simulation techniques in order to forecast the probable outcomes of a military scenario. A classification used by the Imperial Forecasters was Crimson Level which was a security classification that was equivalent to Starfleets Ultra Secret. This was because such scenarios disguised within a Crimson Level consisted of doosmday scenarios from interplanetary famine, plagues and natural disasters to the possiblity of destruction of the Klingon Empire. (TOS novel: The Ashes of Eden)