PS

*raˁd- - thunder (Fronzaroli 1964: 40, 52, 1965: 140; Kogan 2011: 194)

Akkadian
rādu - rainstorm (CAD R 60, AHw. 941)
Christian Palestinian Aramaic
rˁd - thunder (LSP 196)
Arabic
raˁd- - thunder (Lane 1105)
Argobba
raˀad - lightning (Leslau 1997: 218)
Harari
raˀdi - thunder (EDH 132)