  We simulate the Galactic Center nonthermal filaments as magnetized wakes
formed dynamically from amplification of a weak (tens of $\mu$G) global
magnetic field through the interaction of molecular clouds with a Galactic
Center wind. One of the key issues in this cometary model is the stability of
the filament against dynamical disruption. Here we show 2-dimensional MHD
simulations for interstellar conditions that are appropriate for the Galactic
Center. The structures eventually disrupt through a shear driven nonlinear
instability but maintain coherence for lengths up to 100 times their width as
observed. The final instability, which destroys the filament through shredding
and plasmoid formation, grows quickly in space (and time) and leads to an
abrupt end to the structure, in accord with observations. As a by-product, the
simulation shows that emission should peak well downstream from the cloud-wind
interaction site.
