What a beautiful example of a supercell split last evening in north Texas from the KDYX radar.

This was one of those relatively uncommon instances where both the left & right movers were about the same intensity, both with obvious inflow notches & significant hail. #TXwx

From the @CODMeteorology #GOES16 RGB-night view, you can see the outflow boundary in green that lead to cell split!

Supercells develop rotation as updrafts tilt horizontal vorticity (shear) into the vertical & split as downdrafts tilt it again, resulting in vortex couplets.

This evolution of supercell splitting illustrated in Markowski & Richardson (2010) shows resulting split cells propagate in different directions via dynamic pressure perturbations induced by vortex couplets. That projects onto the mean wind & gives the cells their unique motion.