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Which structure does the cloud head of such a storm take?

  • A.A hooked cloud band wrapping around the centre
  • B.A uniform circular shield of cirrus extending outward symmetrically in every direction from the centre
  • C.A straight frontal band
  • D.A line of separate convective cells arranged along the trailing cold front behind the surface low centre

Answer: A

The cloud head appears on satellite imagery as a hooked band wrapping poleward and westward around the developing centre, with a dry slot cutting in behind it. Its evolution is one of the clearest indicators of rapid development. Tropical cyclones show the circular symmetric shield, and straight bands and convective lines belong to less vigorous systems. Reading the definition literally, rather than recalling a formula, is the reliable route through questions of this shape.

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