PARLIAMENT QUESTION: ACCURATE WEATHER FORECASTING

1. At a Glance

• Lok Sabha unstarred-question reply (11 Mar 2026) by Ministry of Earth Sciences (MoES) detailing accuracy gains in cyclone, heat-wave, heavy-rainfall and thunderstorm forecasts [S1].
• Anchored in IMD's 150-year legacy and the newly approved Mission Mausam (Sep 2024) — relevant to GS-III (Disaster Management, S&T) and GS-II (Govt schemes) [S1][S2].
• Tests static facts (ministry, implementing agencies) plus current numbers (error margins, lead-time).

2. Why in the News

• MoES tabled the data in Parliament on 11 Mar 2026 showing forecast skill upgrades and reviewing Mission Mausam rollout [S1].
• Companion parliament reply (PRID 2238025) on Mission Mausam the same day [S3].

3. Background & Evolution

• India Meteorological Department (IMD) established 1875, oldest scientific dept under Govt of India; now under MoES (carved out 2006) [S2].
• National Monsoon Mission (2012) and High-Performance Computing Mission built modelling backbone [S2].
• Mission Mausam approved by Union Cabinet on 11 Sep 2024, outlay ₹2,000 crore for 2 years [S2].
• Lead time for severe-weather warnings expanded to ~7 days; ~40–50 % accuracy gain over the last decade [S2].

4. Core Static Facts

• Nodal ministry: Ministry of Earth Sciences (not MoEFCC) [S1].
• Implementing agencies under Mission Mausam: IMD, IITM (Pune), NCMRWF (Noida) [S2].
• Mission Mausam outlay: ₹2,000 crore; period FY 2024-26 [S2].
• Cyclone track forecast error 2025: 80 / 120 / 204 km at 24/48/72 hrs vs 5-yr (2020-24) average 72 / 111 / 154 km [S1].
• Cyclone landfall error 2025: 76 / 82 / 121 km at 24/48/72 hrs vs 5-yr average 16 / 39 / 70 km [S1].
• Intensity forecast absolute error: 3.1 knots [S1].
• Mission Mausam pillars: expansion of observation network (radars, radiosondes, wind profilers), HPC augmentation, AI/ML-based modelling, impact-based forecasting [S2].
• 4 additional Doppler radars sanctioned under Mission Mausam for J&K [S4].

5. Multi-Dimensional Analysis

Scientific / Technological - Shift from NWP-only to AI/ML hybrid models and impact-based forecasting (IBF) at block level [S2]. - HPC upgrade beyond present Pratyush + Mihir petaflop systems [S2].

Administrative - Multi-agency vertical: MoES → IMD/IITM/NCMRWF; coordination with NDMA, NDRF, state DMAs for last-mile dissemination [S1][S2]. - Slight regression in 2025 landfall errors (76 km vs 16 km avg) — flags operational variance, not modelling failure [S1].

Economic - ~40–50 % accuracy gain credited with reducing cyclone fatalities and crop loss; supports PMFBY insurance triggers [S2].

Environmental / Climate - Critical for adapting to climate-change-driven extreme events — heat waves, cloudbursts, compound flooding [S1].

Federal / Governance - Sub-divisional and district-wise warnings via radar densification (e.g., J&K) require state SDMA uptake [S4].

6. Recent Developments (last 12-18 months)

• 11 Sep 2024: Cabinet approval of Mission Mausam [S2].
• 2025: Cyclone track errors 80/120/204 km published; landfall errors widened vs 5-yr mean [S1].
• Mar 2026: Parliament Q&A on Mission Mausam and forecasting accuracy tabled [S1][S3].
• Sanction of 4 additional radars in J&K under Mission Mausam [S4].

7. Prelims Hooks

• IMD founded in 1875 [S2].
• IMD is under Ministry of Earth Sciences, NOT Ministry of Environment, Forest & Climate Change [S1].
• Mission Mausam approved 11 September 2024 by Union Cabinet [S2].
• Mission Mausam outlay: ₹2,000 crore over 2 years [S2].
• Three implementing institutions: IMD, IITM, NCMRWF [S2].
• NCMRWF is located at Noida; IITM at Pune [S2].
• 2025 cyclone track error at 24 hr lead = 80 km [S1].
• Intensity forecast absolute error = 3.1 knots [S1].
• Severe-weather warning lead time expanded to ~7 days [S2].
• HPC systems used: Pratyush and Mihir [S2].
• AI/ML integration is a stated pillar of Mission Mausam [S2].
• Radar expansion in Jammu & Kashmir = 4 additional units [S4].

8. Mains Relevance

• GS-III: Disaster Management; Science & Technology — Indigenisation, AI applications.
• GS-II: Government schemes & welfare delivery.
• Probable stems: 1. "Discuss how Mission Mausam aims to make India's weather forecasting comparable to global standards. What are the implementation challenges?" 2. "Improving cyclone forecast accuracy has saved lives but landfall prediction remains uneven. Examine." 3. "Evaluate the role of AI/ML in extreme-weather early-warning systems in India."

9. Related Topics to Study Next

• National Monsoon Mission, 2012 — predecessor in dynamical modelling [S2].
• NDMA & Common Alerting Protocol (CAP) — last-mile dissemination link.
• Pratyush & Mihir HPC — compute backbone of forecasting.
• Cyclone classification by IMD (Depression → Super Cyclonic Storm) — standard prelims hook.
• Climate Change Action Plan / NAPCC — adaptation linkage.
• ISRO INSAT-3DR / 3DS satellites — observational inputs.
• WMO frameworks — global standards reference.
• Disaster Management Act, 2005 — statutory basis for alerts.

10. Common Errors / Trap Areas

• Placing IMD under MoEFCC — wrong; it is under MoES [S1].
• Confusing Mission Mausam (₹2,000 cr, 2024) with National Monsoon Mission (2012) [S2].
• Assuming accuracy improved on every metric — 2025 landfall errors widened vs 2020-24 average [S1].
• Mis-attributing implementation to ISRO alone; IMD/IITM/NCMRWF are the three nodal bodies [S2].
• Treating "lead time" and "accuracy" as the same — Mission Mausam targets both, distinctly [S2].

11. Sources

• [S1] PARLIAMENT QUESTION: Accurate Weather Forecasting, PIB / MoES, 11 Mar 2026 — https://www.pib.gov.in/PressReleasePage.aspx?PRID=2238029 — (tier 1)
• [S2] Mission Mausam Unveiled: ₹2,000 Crore initiative, PIB — https://www.pib.gov.in/PressReleaseIframePage.aspx?PRID=2054427 — (tier 1)
• [S3] PARLIAMENT QUESTION: Mission Mausam, PIB — https://www.pib.gov.in/Pressreleaseshare.aspx?PRID=2238025 — (tier 1)
• [S4] IMD to install 4 additional radars under Mission Mausam in J&K, PIB — https://www.pib.gov.in/PressReleasePage.aspx?PRID=2163866 — (tier 1)