Meteorology · Tropical Cyclones
A tropical system with maximum sustained winds of 45 knots is classified as a:
- ATropical depression
- BHurricane
- CTropical storm✓ Correct
- DExtratropical low
Explanation
Sustained winds of 34–63 knots define a tropical storm (at which point it is given a name). Below 34 knots it is a tropical depression; at 64 knots or more it becomes a hurricane or typhoon.
Authority: Bowditch (Pub. No. 9)
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