The Original CFM vector technique for predicting MCS movement
Assumes the motion of individual cells is described by the 850-300 mean wind:
Vcell=V850mb+V700mb+V500mb+V300mb
Assumes the vector describing the propagation is the vector anti-parallel to the low-level jet
If the above are true, then the vector that describes the movement of the most active part of an MCS is represented by:
VMBE movement=Vcell -Vllj