  We use leading order effective kinetic theory to simulate the
pre\nobreakdash-equilibrium evolution of transverse energy and flow
perturbations in heavy-ion collisions. We provide a Green function which
propagates the initial perturbations of the energy-momentum tensor to a time
when hydrodynamics becomes applicable. With this map, the pre-thermal evolution
from saturated nuclei to hydrodynamics can be modeled in the framework of
weakly coupled QCD.
