Western Disturbances

Western disturbances, as defined by the India Meteorological Department (IMD), are weather systems that form in the Caspian or Mediterranean Sea regions. These disturbances are categorized as extra-tropical storms originating in the Mediterranean. They are characterized by low-pressure areas that result in the occurrence of unexpected rainfall, snowfall, and fog in northwest India.

Formation

• Western Disturbance originates in the Mediterranean Sea. It is triggered by the movement of cold air from the Polar Regions into an area with relatively warmer air and significant moisture.
• This transition occurs due to the presence of a high-pressure system over regions like Russia and ....