whirlwind
颷 centers on a violent, spinning wind: a whirlwind. The single given meaning is a specific meteorological phenomenon.
颷 combines 風 (wind) with 炎 (flame, blaze), suggesting a wind that carries or is like fire—a fierce, swirling wind. The exact historical development is uncertain, but the component choice is visually descriptive.
Inside the wind enclosure 風, two flames 炎 are whipped into a spiral. Picture a whirlwind of fire and wind: 颷 is a whirlwind.
For ヒョウ, imagine a whirlwind howling like a hyena: hyena -> ヒョウ, and the spinning wind sounds like its wild cry.