This is a White Paper in support of the mission concept of the Large Observatory for X-ray Timing (LOFT), proposed as a medium-sized ESA mission. We discuss the potential of LOFT for the study of high-energy radiation from thunderstorms and lightning. For a summary, we refer to the paper.

Marisaldi, M

Smith, DM

Brandt, S

Briggs, MS

Budtz-Jørgensen, C

Campana, R

Carlson, BE

Celestin, S

Connaughton, V

Cummer, SA

Dwyer, Joseph

Fishman, GJ

Fullekrug, M

Fuschino, F

Gjesteland, T

Neubert, T

Østgaard, N

Tavani, M

January 12, 2015