Movements of western disturbance and associated cloud convection
Western disturbances have a long history of climatological, synoptic and satellite observations based studies. In present study an attempt has been made to understand the different aspects of western disturbances like movement, associated convection, induce systems and associated weather. The western disturbances (WDs) during post monsoon and winter season have been selected for the study as they are mainly responsible for precipitation over western Himalayan region and adjoining plains of northwest India. The areal extension of precipitation increases, in cases when westerly trough or WD interacts with southwesterly winds from Arabian Sea and easterly/southeasterly from Bay of Bengal. It caused rain/snow over western Himalayan region and rain/thundershowers with sometimes hailstorm over northern plains.