storm, tempest
嵐 centers on violent atmospheric disturbance: a storm or tempest, with wind and often mountain-related weather.
嵐 combines 山 (mountain) and 風 (wind), suggesting a mountain wind or storm. The exact historical development is uncertain, but the component combination clearly points to tempestuous weather.
Picture a mountain with wind howling around it: 山 on top, 風 below. That mountain wind is a fierce storm.
For ラン, imagine a storm so strong it could run you over: run -> ラン, and the mountain wind runs wild.
storm; tempest
sandstorm
mountain vapor; mountain vapour
raging storm
magnetic storm
mountain storm
Wuthering Heights (novel by Emily Bronte)
wind blowing through fresh verdure
storm in a teacup; tempest in a teapot
first strong wind of autumn
night storm
solar storm
cosmic ray storm
strong nighttime wind
calm before the storm; lull before the storm
Oceanus Procellarum (lunar mare); Ocean of Storms
to cause a commotion; to create a big stir; to invoke a storm
mountain mist; mountain air
political storm
spring storm