GS Paper III — Q8
Explain the mechanism and occurrence of cloudburst in the context of the Indian subcontinent. Discuss two recent examples…
Explain the mechanism and occurrence of cloudburst in the context of the Indian subcontinent. Discuss two recent examples. (Answer in 150 words) 10 marks
हिंदी में प्रश्न पढ़ें
भारतीय उपमहाद्वीप के संदर्भ में बादल फटने की क्रियाविधि और घटना को समझाइए। हाल के दो उदाहरणों की चर्चा कीजिए। (150 शब्दों में उत्तर दीजिए)
Model answer
Drafted with AI by UPSC Answer Check against this question's marking rubric, to the 150-word length. UPSC does not publish answers for Mains — this is one way to score well, not an official key. How we build rubrics and answers.
A cloudburst is an extreme, localized precipitation event exceeding 100 mm per hour over a limited geographical area (around 20–30 sq km).
Mechanism: It is triggered when steep mountain slopes force moisture-laden monsoon winds into rapid orographic lifting. This accelerates vertical convection, forming towering cumulonimbus clouds up to 14 km high. When the strong thermal updrafts can no longer support the massive accumulation of condensed moisture and supercooled droplets at freezing levels, a sudden downdraft collapses the cloud column, releasing an intense, concentrated deluge within minutes.
Occurrence in India: The phenomenon predominantly affects the Himalayas and Western Ghats due to sharp topographical gradients interacting with monsoon trough oscillations, compounded by local microclimatic variations.
Recent Examples:
- Amarnath Cloudburst (2022): A localized deluge near the cave shrine in Jammu and Kashmir triggered flash floods, claiming 16 lives.
- Dharamshala Cloudburst (2021): Intense precipitation caused catastrophic flash floods along the Bhagsu Nag nullah, causing extensive infrastructure damage.
More recently, the August 2025 cloudburst at Chasoti (Kishtwar) on the Machail Mata yatra route killed over 60 people.
How this answer will be evaluated
Framework: Environment: threat, causes, impact, mitigation
What earns full marks: Clear mechanism, specific Indian context, two distinct recent examples with details.
Evaluation rubric
Each sub-part is marked on its own, against the marks and word limit printed on the paper.
- The answer Mechanism of cloudburst in Indian subcontinent and two recent examples. 10 marks · 150 words
explain— definition/context → points in order → small example → short close
Must cover
- Define cloudburst (intense rainfall in short duration)
- Explain mechanism (orographic lifting, unstable air, orographic effect)
- Contextualize for Indian subcontinent (Himalayas, Western Ghats)
- Discuss two recent examples (e.g., Uttarakhand, Kerala)
Loses marks
- Vague description without mechanism
- Listing examples without analysis
- Ignoring the 'Indian subcontinent' context
Earns more
- Mention specific meteorological conditions (e.g., low pressure)
- Link to climate change or global warming
- Mention specific locations of recent events
Extra mark
- Specific date of a recent cloudburst event
- Specific rainfall measurement (mm/hr) of an event
What "Explain" is asking you to do
Make the working of something clear — what sets it off, what follows from what, and what it produces. Explain is the Commission's mechanism word: it dominates the technical papers and the “explain why” stems, where the marks sit in the causal chain and not in the label.
Structure that answers it
State what it is → the initiating condition → the chain of cause, step by step → an instance where it plays out → what the chain produces
Where marks are lost
Describing what something looks like instead of why it works that way. Naming the stages without linking them reads as description too.
Practice this exact question
Write your answer and it is marked point by point against the model answer above — what you covered, what you missed, what you got wrong.
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