Snapshot of the entropy (color coded according to the color bar at the upper left corner, in units of Boltzmann's constant k _b per nucleon) in the plane through the origin normal to the vector n = (− 0.35, 0.93, 0.12) at a post-bounce time of 152 ms in the 27  M _☉ 3D model. The high-entropy plumes with high-order spherical harmonics pattern suggest buoyancy-driven convective overturn of neutrino-heated matter.