MODIFICATION TO THE VECTOR APPROACH
CORFIDI HAS NOTED THAT THE ENVIRONMENTS OF BACK-BUILDING CONVECTION AND BOW ECHOES/DERECHOES OFTEN LOOK SIMILAR THOUGH THEIR MOVEMENT IS VERY DIFFERENT
IT IS THEREFORE THE STRENGTH OF THE MESOHIGH THAT FORMS THAT OFTEN DISTINGUISHED THE MODE OF PROPAGATION
THE DOWNWARD TRANPORT OF MOMENTUM ALSO PLAYS A KEY ROLE.
THE STORM RELATIVE INFLOW AND LOCATION OF MOISTURE CONVERGENCE AND INSTABILITY ALSO PLAYS ROLE