In this paper, analytical fleld expressions are proposed to determine the electromagnetic flelds due to an inclined lightning channel in the presence of a ground re∞ection at the striking point. The proposed method can support difierent current functions and models directly in the time domain without the need to apply any extra conversions. A set of measured electromagnetic flelds associated with an inclined lightning channel from a triggered lightning experiment is used to evaluate the proposed fleld expressions. The results indicate that the peak of the electromagnetic flelds is dependent on the channel angle, the observation point angle as well as the value of the ground re∞ection factor due to the difierence between channel and ground impedances. Likewise, the efiect of the channel parameters and the ground re∞ection on the values of the electromagnetic flelds is considered and the results are discussed accordingly.