Doppler Weather Radar (DWR) network

Why in the News?
India has significantly expanded its Doppler Weather Radar (DWR) network—from 14 units in 2014 to 50—enhancing weather forecasting capabilities, as highlighted by the India Meteorological Department under the Ministry of Earth Sciences.

About Doppler Weather Radar (DWR)
DWR is a radar system that uses the Doppler Effect to measure the velocity and movement of weather systems such as rain, storms, and cyclones. It works by emitting radio waves and analysing the frequency shift of signals reflected back from raindrops or particles.

Key Features

• Tracks direction and speed of precipitation and storm systems.
• Equipped with dual-polarisation technology to distinguish precipitation types (rain, hail, drizzle).
• Provides improved rainfall estimation and detection of severe weather events.
• Reduces false signals for more accurate forecasting.

Recent Developments

• DWR network expanded to cover over 87% of India.
• Additional 50 radars planned under Mission Mausam.
• Introduction of “Nowcast” services for highly localised weather forecasts up to 3 hours in advance.

Significance
The expanded radar network improves early warning systems for cyclones, heavy rainfall, and thunderstorms, helping in disaster preparedness, agriculture planning, and public safety.

Source: PIB