en_tn/isa/30/30.md

show the motion of his arm

AT: "show his power" (See: rc://en/ta/man/translate/figs-metonymy)

in storming anger and flames of fire

AT: "in anger that is like a storm and flames of fire" or "in great anger" (See rc://en/ta/man/translate/figs-metaphor)

with windstorm, rainstorm, and hailstones

"with storms full of wind, rain, and hail"

hailstones

hard pieces of ice that fall from the sky like rain