The combined effects of forced and natural convection. Heat transfer in the presence of transverse magnetic field form a vertical surfaces with radiation heat transfer is studied. The buoyancy aided flow and the buoyancy opposing flows are investigated with viscous dissipation effects included in the governing,equations. It is found,that four parameters can describe the problem under consideration, the mixed parameter, x the radiation-conduction parameter, R-d, the magnetic field parameter, Ha(x)(2)/Re-x, and the Eckert number, Ec. The local wall shear stresses and the local Nusselt number variations are drawn. for different dimensionless groups.