UPSC Mains 2024 GS1 Q16 — Climatology
What is a twister? Why are the majority of twisters observed in areas around the Gulf of Mexico? (Answer in 250 words) 15
Question Decoded — examiner's intent
- Directive verbs
- What isWhy
- Scope keywords
- twistermajority of twistersareas around the Gulf of Mexico
- Implicit sub-parts
- Scientific definition and mechanism of formation (supercells and wind shear).
- The role of the 'Tornado Alley' and 'Dixie Alley' geography.
- The collision of contrasting air masses (Maritime Tropical vs Continental Polar).
- The impact of the Rocky Mountains on air current behavior.
- The role of the 'Dry Line' in triggering atmospheric instability.
- Common pitfalls
- Confusing twisters (tornadoes) with hurricanes/cyclones which are larger-scale maritime systems.
- Failing to mention the 'Dry Line' or the 'Rocky Mountains' as the physical barriers that channel air flow.
- Spending too much word count on the definition of a twister rather than the 'Why' which carries the 15-mark weight.
- Neglecting to draw a simple schematic diagram showing the clash of air masses over the central USA.
- Dimensions required
- Physical GeographyClimatologyTopographic InfluenceAtmospheric Dynamics
- Marks allocation hint
Allocate 3-4 marks (50 words) for the technical definition and formation mechanics. The remaining 11-12 marks (200 words) must focus on the unique intersection of the warm Gulf moisture, the cold Canadian air, and the dry Mexican plateau air, specifically highlighting how the North American landmass acts as a funnel.
Unlock the full analysis for this question
You've seen the question and its examiner-intent decoding. Subscribers also get:
- 🔗 Similar Previous Year Questions — cross-year, cross-paper matches so you study the topic, not the question
- 📚 Source Map — verified citations from Laxmikanth, NCERT, PRS, Yojana, Economic Survey, Spectrum
- 🌱 How this topic is evolving — current-affairs bridge anchored to live TARS news clustering
- 🧭 Examiner's Pattern — how the topic has been framed across every year UPSC has tested it
- ✍️ Answer Skeleton — a structured outline (intro → body → conclusion) you can flesh out
- 🎯 AI evaluation — write your answer, get rubric-based scoring from gs-eval
Or browse 132+ free preview questions across all years and papers — the first 3 questions of every paper are unlocked.
Ready to practice?
Subscribers can attempt this question in 250 words and get an instant, rubric-based evaluation showing where they stand.
Subscribe to evaluate your answer →