Discuss the meaning of colour-coded weather warnings for cyclone prone areas given by India Meteorological Department.

Introduction

The India Meteorological Department (IMD) issues colour-coded, impact-based warnings that translate forecast severity into the level of action expected from disaster managers and the public in cyclone-prone coastal areas.

Meaning of the colour codes

• Green — No warning: no severe weather expected; no action needed.
• Yellow — Watch: severe weather is possible over the coming days; stay updated on advisories.
• Orange — Alert: high probability of damaging weather; be prepared — administration mobilises, evacuation planning begins.
• Red — Warning: extremely severe weather expected; take action — evacuation, suspension of fishing operations, closure of ports, schools and coastal activities.

Link with cyclone bulletins

For cyclones, these colours ride on IMD's four-stage system: Pre-Cyclone Watch (72 hours ahead), Cyclone Alert (48 hours, yellow), Cyclone Warning (24 hours, orange) and Post-Landfall Outlook (12 hours, red).

Significance

• Impact-based: combines hazard probability with expected damage and local vulnerability, not just wind speed.
• Gives NDMA, state agencies, media, fishermen and citizens one easily understood language for graded response.
• Disseminated through SMS, mobile alerts and broadcast media down to panchayat level.

Conclusion

Colour-coded warnings, coupled with mass evacuations, turned cyclones Phailin (2013), Fani (2019) and Biparjoy (2023) into low-casualty events — a dramatic improvement over the roughly 10,000 deaths of the 1999 Odisha super cyclone, and a model of early-warning-led disaster risk reduction.