Tilted Vertical Structure of a Developing Wave Cyclone

Cyclone:

  • The upper-level low MUST be located north and west of the surface low - i.e., the area of low pressure must tilt to the northwest with height.
  • Here is an example in real life - surface map 500mb
  • Here is an even better example:
  • An area of divergence MUST be directly above the surface low
  • If divergence aloft > convergence at surface, will the low will deepen, intensifying the storm, or will it decay? ANSWER
  • if divergence aloft < convergence at surface, will the low will deepen, or decay? ANSWER

QUESTION FOR THOUGHT:

Would a wave cyclone intensify or dissipate if the upper trough were located to the east of the surface disturbance?  Explain with the aid of a diagram.