Jennifer Kathleen Fletcher¹, Alexander James Roberts², James Groves³, Abdou Lahat Diop⁴, John H Marsham⁵, Alan M Blyth³, Douglas J Parker⁶ and Bernard Chanzu⁷, (1)National Centre for Atmospheric Science, Leeds, United Kingdom, (2)University of Leeds, School of Earth and Environment, Leeds, LS2, United Kingdom, (3)University of Leeds, Leeds, United Kingdom, (4)Agence Nationale de l'Aviation Civile et de la Météorologie, Dakar, Senegal, (5)University of Leeds, National Centre for Atmospheric Science, Leeds, United Kingdom, (6)School of Earth and Environment, University of Leeds, ICAS, Leeds, United Kingdom, (7)Kenya Meteorological Department, Nairobi, Kenya