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Which hodograph feature indicates streamwise vorticity?

  • A.A long straight segment, which indicates a strong uniform shear through the depth of the layer concerned
  • B.A short curve
  • C.A curve that passes through the origin, indicating that the wind vanishes at some level within the sounding
  • D.Curvature in the lowest few kilometres

Answer: D

Curvature means the shear vector turns with height, which aligns the horizontal vorticity with the storm relative flow and produces a rotating updraught when that vorticity is tilted upward. A straight hodograph gives crosswise vorticity and favours splitting storms. Recognising the distinction from the shape alone is a standard operational skill.

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