Below are links for long animations of the development of a localized cyclone in Eady's model. The initial condition is a localized disturbance on the tropopause, which gives rise to a developing wave packet that extends to the right due to downstream development.

Surface loop.
 

Tropopause loop.


Now compare the idealized simulations with the following observational example over the Pacific Ocean. The first loop shows the surface development, and the second shows the 500 hPa development.

Surface loop.
 

500 hPa loop.



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