Numerical simulations of a transverse indirect circulation and low-level jet in the exit region of an upper-level jet.

Uccellini and Johnson present a case study of a severe weather event in Ohio on 10-11 May 1973 to show evidence for coupling between an upper-tropospheric jet streak and a low-level jet within an indirect transverse circulation found in the exit region of the upper-level jet. The differential advection of moisture and temperature created by the shear between the upper- and low-level jets reduced convective stability, thereby enhancing the potential for severe convection. Two 12 h numerical simulations of the 10-11 May 1973 case are studied. -from Authors