Introduction / Context:
Different ocean basins use consistent wind-speed thresholds to classify tropical cyclones. Knowing the knot or metre-per-second limits that separate tropical depressions, tropical storms, and hurricanes/typhoons is common exam material in meteorology and geography.
Given Data / Assumptions:
- Given maximum sustained wind ≈ 33 m/s.
- Assume 1 m/s ≈ 1.94 knots; 33 m/s ≈ 64 knots.
- We use the widely adopted Saffir–Simpson/World Meteorological Organization thresholds.
Concept / Approach:
A system reaches hurricane (Atlantic/Eastern Pacific) or typhoon (Western Pacific) intensity at sustained winds of at least 64 knots (≈ 74 mph ≈ 33 m/s). Below this, 34–63 knots denotes a tropical storm; under 34 knots is a tropical depression. Therefore, a system at 33 m/s has just met the hurricane (or typhoon) threshold.
Step-by-Step Solution:
Convert 33 m/s to knots: 33 * 1.94 ≈ 64 knots.Compare with classification thresholds.Identify correct category at ≥ 64 kn: hurricane.Select “hurricane.”
Verification / Alternative check:
Operational forecast centers (e.g., NHC, JTWC) use these cutoffs; storm advisories change classification once sustained winds reach 64 knots.
Why Other Options Are Wrong:
Tropical depression: < 34 knots; too weak.Tropical storm: 34–63 knots; slightly below the threshold.None of the above: Incorrect because “hurricane” fits exactly.
Common Pitfalls:
Confusing gusts with sustained winds; classifications use 1-minute (or regional standard) sustained winds, not peak gusts.
Final Answer:
hurricane
Discussion & Comments