From The Collaborative International Dictionary of English v.0.48 [gcide]:
Tempestuous \Tem*pes"tu*ous\, a. [L. tempestuous: cf. OF.
tempestueux, F. temp[^e]tueux.]
Of or pertaining to a tempest; involving or resembling a
tempest; turbulent; violent; stormy; as, tempestuous weather;
a tempestuous night; a tempestuous debate. --
Tem*pes"tu*ous*ly, adv. -- Tem*pes"tu*ous*ness, n.
[1913 Webster]
They saw the Hebrew leader,
Waiting, and clutching his tempestuous beard.
--Longfellow.
[1913 Webster]
From WordNet (r) 3.0 (2006) [wn]:
tempestuous
adj 1: characterized by violent emotions or behavior; "a stormy
argument"; "a stormy marriage" [syn: stormy,
tempestuous]
2: (of the elements) as if showing violent anger; "angry clouds
on the horizon"; "furious winds"; "the raging sea" [syn:
angry, furious, raging, tempestuous, wild]