Both Uses

impetuous
in
Dante's Inferno
(Auto-generated)

Not otherwise it was than of a wind, impetuous through the opposing heats, that strikes the forest, and without any stay shatters the branches, beats down and carries them away; forward, laden with dust, it goes superb, and makes the wild beasts and the shepherds fly.†
Canto 7-9 *

impetuous = impulsive (acting suddenly without much thought)
Mars draws a flame from Val di Magra wrapped in turbid clouds, and with impetuous and bitter storm shall it be opposed upon Campo Piceno, where it shall suddenly rend the mist, so that every White shall thereby be smitten.†
Canto 22-24

Definitions:

(1) (impetuous as in: an impetuous decision)
impulsive (acting suddenly without much thought) -- often with an unfortunate consequence
(2) (meaning too rare to warrant focus)
In historic literature, impetuous often refers to any rapid, forceful, and/or violent movement.