Space Environment Viewing and Analysis (SEVAN) are recording the cosmic ray and atmospheric pressure in Jawaharlal Nehru University, India. The cosmic rays are being recorded in this device continuously since 2010 to infer the correlation of the atmospheric pressure with the cosmic ray intensity from the Galactic sources and from the Sun. On 30th May 2014 a sudden thunderstorm in Delhi, India was unprecedented. The blow of the wind was at the rate of 92 -100 Km per hour, which has claimed 23 human lives, thousands of trees were uprooted and several buildings were collapsed. Routine weather prediction of different agencies could not able to predict this catastrophe.