Bharat Forecast System set to give sharper rain alerts, Pg1

Key Highlights:

• India Meteorological Department (IMD) adopts the Bharat Forecast System (BFS) for sharper, localized rainfall forecasts.
• Developed by Indian Institute of Tropical Meteorology (IITM), BFS uses a triangular-cubic octahedral grid system for mapping.
• Improves spatial resolution from 12-km grids (existing model) to 6-km grids, enabling panchayat-level forecasts.
• Primarily targets short- and medium-range forecasts (3 to 7 days).
• BFS has been tested since 2002 and supports better prediction of heavy rainfall and localized flood risks.

Detailed Insights:

• How BFS Improves Accuracy:
  • Existing models use square-shaped, equal-sized 12-km grids which oversimplify terrain-specific rainfall variability.
    • BFS replaces this with 6-km triangular-cubic octahedral grids, enhancing mapping precision four-fold.
    • Especially useful for agricultural planning, disaster preparedness, and early flood alerts.
  • Forecasting Capability:
    • Can deliver block- and panchayat-level forecasts, aiding local administration.
    • Yet to be adapted for real-time thunderstorms or microburst events—for which other models and Doppler radars are used.
  • Strategic Importance:
    • Makes India the only country offering 6x6 km operational weather forecasts.
    • Complements the ongoing rollout of 34 Doppler Weather Radars across the country to enhance local thunderstorm detection.

Mains Mock Question:

Discuss the significance of the Bharat Forecast System (BFS) in enhancing India’s weather prediction capabilities. How can it improve disaster preparedness and local governance?