We use a recently formulated fluid theory of turbulent Farley‐Buneman waves to study the impact of anomalous transport coefficients on the aspect angles of large‐amplitude waves in the high‐latitude E region in the strong nonlinear regime. The theory is self‐consistent and contains all the nonlinearities of the system except for the generation of unstable secondary waves through a two‐step process, which has been studied elsewhere. Our study leads us to conclude that nonlinear processes are responsible for an increase in the aspect angles of large‐amplitude waves through an increase in the scattering of electrons in the direction parallel to the geomagnetic field in conjunction with a lack of any significant increase in the scattering of electrons by waves in the plane perpendicular to the geomagnetic field.