Discuss the meaning of color-coded weather warnings for cyclone-prone areas given by the India…

Question

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

Ghissu Editorial · Accepted Answer

IMD's colour codes tell people what to do as a cyclone nears: green means no action, yellow means be updated, orange means be prepared and red means take action. The Cyclone Alert, Warning and post-landfall outlook come about 48, 24 and 12 hours ahead.

**Introduction**

The India Meteorological Department, also the WMO regional cyclone centre for the North Indian Ocean, issues colour-coded warnings that turn a cyclone forecast into an instruction for people and administrators.

**What Each Colour Means for a Cyclone**

SKETCH: spectrum | IMD colour codes by impact
left: No impact
right: Threat to life
- Green: no action
- Yellow: be updated
- Orange: be prepared
- Red: take action

1. **Green as the baseline**: No adverse weather is expected, so fishing and port activity continue.
2. **Yellow with the Cyclone Alert**: About 48 hours ahead, fishermen are called back and ports hoist cautionary signals.
3. **Orange with the Cyclone Warning**: About 24 hours ahead, IMD names the landfall point, wind speed and storm surge, so evacuation and NDRF deployment begin.
4. **Red with the post-landfall outlook**: About 12 hours before landfall, danger to life is signalled, evacuation is completed and inland districts are briefed.

**Why Colour Codes Matter in Cyclone-Prone Areas**

1. **Impact over intensity**: Impact-based forecasts pair hazard with local vulnerability, so one storm may be orange in one district and red in another.
2. **Lives saved**: Odisha moved over a million people before Fani (2019), and Gujarat reported no direct deaths in Biparjoy (2023).
3. **Common language**: The same colours cover rain and heatwaves and reach phones through NDMA's SACHET alerts.
4. **Persistent gaps**: Rapid intensification, as in Ockhi (2017), shrinks lead time, and colours are often misread as rainfall amounts.

**Conclusion**

Colour codes turn cyclone science into a ladder of action, cutting deaths from about 10,000 in 1999 to a few dozen in storms such as Fani. Village-level impact maps and drills can extend this zero-casualty approach to every coastal district.

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

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