Tephigram
Tephigram
Thermodynamic diagram used in weather analysis
A tephigram is one of four thermodynamic diagrams commonly used in weather analysis and forecasting. The name evolved from the original name "T--gram" to describe the axes of temperature (T) and entropy () used to create the plot.[1] Usually, temperature and dew point data from radiosondes are plotted on these diagrams to allow calculations of convective stability or convective available potential energy (CAPE).[1] Wind barbs are often plotted at the side of a tephigram to indicate the winds at different heights.