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According to Dvorak classification T3.5 represents :

  • A.Tropical Depression
  • B.Tropical Cyclone
  • C.Cat 1 Hurricane
  • D.Cat 2 Hurricane

Answer: B

T3.5 represents a tropical cyclone of tropical storm strength.

In the Dvorak technique a T-number estimated from satellite cloud patterns is converted to a maximum wind. T3.5 corresponds to about 55 knots, within the 34 to 63 knot range of a tropical storm, that is a named tropical cyclone (a severe cyclonic storm in the Indian scale).

A tropical depression is below T2.5 (under 35 knots). Hurricane strength, 64 knots and above, begins at T4.0, so Category 1 starts there and Category 2 corresponds to about T5.0, both above T3.5.

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