Yes, CYCLONE is a Scrabble word!

Letter values in Scrabble US: C 3, Y 4, C 3, L 1, O 1, N 1, E 1.

Is it a valid word?

CYCLONE is a valid word in the official Scrabble dictionary (US), the UK Scrabble Dictionary and Words with Friends (ENABLE).

(meteorology) rapid inward circulation of air masses about a low pressure center; circling counterclockwise in the northern hemisphere and clockwise in the southern
a violent rotating windstorm