<p>This study investigates the dynamical evolution of a thunderstorm over the Guwahati on 20th April, 2024 using measurements from the 212.5&#xa0;MHz Gauhati University Stratosphere-Troposphere (ST) radar, radiosonde soundings, ERA5 reanalysis, and surface rainfall data. The storm developed within a highly unstable, moisture-rich environment with convective available potential energy of around 1350 Jkg^− 1. Radar observations revealed a two-pulse multicellular system separated by a stratiform phase, characterized by mid-tropospheric updrafts exceeding 2 ms^− 1 and downdrafts reaching up to 4.5 ms^− 1, together with episodic rainfall bursts and enhanced wind speed of 40 ms^− 1. Turbulence related radar parameters intensified markedly during the convective stages. Signal to noise ratio (SNR) increased owing to hydrometeor scattering and refractive index fluctuations, while the refractive index structure constant (Cn²) exhibited enhancement of magnitude throughout the troposphere relative to clear-air conditions. Comparison with ERA5 vertical velocity highlights the importance of high-resolution profiling for resolving storm-internal dynamics over complex terrain. These results demonstrate the capability of ST radar systems to capture fine scale kinematic and turbulence signatures in severe convection and their potential utility for short-range nowcasting and hazard assessment over Northeast India.</p>