Thermodynamics of the Atmosphere in Relation to Tornado Activity Over NE India and Bangladesh

The intensification of tornado depends mainly on the synoptic conditions of the troposphere. The main objective of this paper is to differentiate the prevalent atmosphere from thermodynamically point of view. Atmospheric stability parameters such as Lifted Index (LI), Total Total Index (TT), Deep Convective Index (DCI), Wind Index (WI), Severe Weather Threat Index (SWEAT), Convective Available Potential Energy (CAPE), Convective Inhibition (CIN) and Bulk Richardson Number (BRN) are computed on the tornado events over NE India and Bangladesh from 1993 to 2010. It is observed that TT may be used as a best predictor of differentiating prevalent atmosphere from fair one.