India has significantly expanded its Doppler Weather Radar (DWR) network since 2014, increasing from 14 operational units to 50, marking over 250% rise: Dr Jitendra Singh

1. At a Glance

• Doppler Weather Radar (DWR) is a remote-sensing radar that uses the Doppler effect to measure velocity and intensity of precipitation, enabling nowcasting of cyclones, thunderstorms, hailstorms and cloudbursts [1].
• India's DWR network has grown from 14 units (2014) to 50 units (2026) — a >250% rise, covering over 87% of the country under IMD/Ministry of Earth Sciences (MoES) [1].
• Relevance: GS-III (Disaster Management, S&T), Prelims (schemes, agencies, Mission Mausam).

2. Why in the News

• On 29 April 2026, Union MoS (IC) Earth Sciences Dr. Jitendra Singh announced the network's expansion to 50 DWRs, inaugurated a Weather Radar Selfie Point at the IMD HQ, Lodhi Road, New Delhi, and declared India's entry into the era of "raindrop-level micro-precision forecasting" [1].
• 50 more DWRs planned under Mission Mausam [1].

3. Background & Evolution

• IMD established 1875; celebrated 150th Foundation Day on 14 January 2025 [2][3].
• 2014: only 14 operational DWRs; coverage limited mainly to coastal cyclone-prone regions [1].
• 2023: ~39 DWRs; land area coverage up by ~35% from 2014 [2].
• September 2024: Union Cabinet approved Mission Mausam with outlay of ₹2,000 crore for 2024–26 [4].
• 2025 target (earlier announcement): pan-India DWR coverage for extreme weather prediction [5].
• April 2026: tally crosses 50 DWRs, covering >87% area [1].

4. Core Static Facts

• Nodal Ministry: Ministry of Earth Sciences (MoES) — not MoEFCC [1].
• Implementing Agency: India Meteorological Department (IMD), HQ Mausam Bhavan, Lodhi Road, New Delhi [1].
• Programme: Mission Mausam — ₹2,000 cr, launched Sept 2024, goal: "Weather-ready & Climate-smart Bharat" by 2026 [4].
• Mission Mausam observation systems (planned): 50 DWRs, 60 Radio Sonde/Wind stations, 100 disdrometers, 10 Wind Profilers, 25 radiometers, 1 Urban testbed, 1 Process testbed, 1 Ocean Research station, 10 Marine AWS [2].
• DWR bands deployed in India: S-band, C-band, X-band (C-band recently inaugurated) [6].
• Current DWR count: 50 (Apr 2026); planned addition: 50 more under Mission Mausam [1].
• Coverage: >87% of India's landmass [1].

5. Multi-Dimensional Analysis

Scientific / Technological

• DWR uses pulse-Doppler radar principle — measures radial velocity of hydrometeors; gives 3-D wind, reflectivity (dBZ), and spectrum width [1].
• Enables nowcasting (0–3 hr lead) for thunderstorms, hail, microbursts — critical for aviation and agriculture [1].
• Indigenous C-Band Polarimetric DWRs built under Atmanirbhar Bharat by IMD–BEL/ISRO collaboration [6].

Administrative / Disaster Management

• Feeds into NDMA/NDRF cyclone evacuation (cf. Cyclone Fani, Biparjoy — zero/low-casualty drills) [5].
• Network gaps remain in Himachal Pradesh, NE hills, Ladakh (raised in Parliament Question 2025) [7].

Economic

• Improved monsoon nowcasting cuts crop losses; supports PM-Fasal Bima Yojana claims and aviation safety.
• Mission Mausam: ₹2,000 cr outlay 2024–26 [4].

Environmental / Climate

• Critical for tracking climate-change-driven extreme events — cloudbursts (Uttarakhand, HP), western disturbances, urban flooding (Chennai, Bengaluru).
• Supports WMO Global Basic Observing Network (GBON) obligations [2].

Geopolitical / Strategic

• IMD shares cyclone advisories with RSMC New Delhi mandate — serves Bangladesh, Myanmar, Sri Lanka, Maldives, Pakistan, Oman, Yemen in North Indian Ocean basin.

6. Recent Developments (last 12-18 months)

• Sept 2024: Cabinet approved Mission Mausam (₹2,000 cr) [4].
• 14 Jan 2025: PM Modi addressed IMD 150th Foundation Day; released IMD Vision-2047 [3].
• 2025: Two new C-Band DWRs, solar panel system, Meteorological Museum inaugurated at IMD [6].
• 2026: Announcement to install 50 AWS each in Delhi, Mumbai, Chennai, Pune [8].
• 29 Apr 2026: 50-DWR milestone announced; Selfie Point inaugurated at IMD HQ [1].

7. Prelims Hooks

• DWR network expanded from 14 (2014) → 50 (Apr 2026); >250% rise [1].
• Present DWR coverage: >87% of India's geographical area [1].
• Implementing body: IMD under Ministry of Earth Sciences [1].
• Mission Mausam launched September 2024; outlay ₹2,000 crore for 2024–26 [4].
• Mission Mausam to add 50 more DWRs, 60 Radio Sonde/Wind stations, 10 Wind Profilers, 25 radiometers [2].
• IMD established in 1875; 150th Foundation Day 14 January 2025 [3].
• IMD HQ: Mausam Bhavan, Lodhi Road, New Delhi [1].
• India is RSMC (Regional Specialized Meteorological Centre) New Delhi for tropical cyclones over North Indian Ocean [5].
• DWR works on the Doppler Effect — frequency shift of returned EM pulse from moving precipitation [1].
• Indigenous C-Band Polarimetric DWRs inaugurated 2025 [6].
• IMD's parent → MoES (not MoEFCC, not MoST) [1].
• "Raindrop-level (micro-precision) forecasting" phrase coined by Dr. Jitendra Singh on 29 April 2026 [1].

8. Mains Relevance

• GS-III: Disaster Management (cyclones, cloudbursts); Science & Technology — indigenisation; Climate Change adaptation.
• GS-II: Government schemes & flagship initiatives (Mission Mausam).
• Probable question stems: 1. "Evaluate the role of an expanded Doppler Weather Radar network in strengthening India's disaster preparedness against hydro-meteorological hazards." (GS-III) 2. "Mission Mausam marks a paradigm shift from weather forecasting to climate services. Discuss." (GS-III) 3. "Indigenisation of meteorological infrastructure is as critical as defence indigenisation. Comment." (GS-III, S&T)

9. Related Topics to Study Next

• Mission Mausam — parent umbrella programme.
• IMD Vision-2047 — institutional roadmap unveiled Jan 2025.
• INSAT-3DR / INSAT-3DS satellites — space-based companion to ground DWR.
• NDMA cyclone preparedness — end-user of DWR forecasts.
• WMO & RSMC New Delhi — international interface.
• PM-Fasal Bima Yojana / Agromet Advisory Services — agriculture link.
• Glacial Lake Outburst Floods (GLOFs) & cloudburst monitoring — Himalayan gaps in DWR network.
• National Monsoon Mission & High-Performance Computing (Pratyush, Mihir) — modelling backbone.

10. Common Errors / Trap Areas

• Wrong ministry: IMD is under Ministry of Earth Sciences, not MoEFCC or Ministry of S&T (Dr. Jitendra Singh holds both portfolios — easy to confuse).
• Wrong baseline: 2014 figure is 14, not 15 or 17 (sources vary; PIB 2026 statement uses 14) [1].
• Mission Mausam ≠ Monsoon Mission: National Monsoon Mission (2012) is a separate modelling programme.
• DWR vs AWS: Doppler Radars (50) and Automatic Weather Stations (separate expansion of 50 each in 4 metros, 2026) are different infrastructure [8].
• IMD founding year: 1875 (often confused with 1864 Calcutta cyclone or 1877 famine).