Interactions of point vortices in the Zabusky-McWilliams model with a   background flow
  We combine a simple quasi-geostrophic flow model with the Zabusky-McWilliams theory of atmospheric vortex dynamics to address a hurricane-tracking problem of interest to the insurance industry. This enables us to make predictions about the "follow-my-leader" phenomenon. 
Colm Connaughton and John R. Ockendon
physics.flu-dyn