There are at least 6 artists with this name :

1. TORNADO is an Tampere, FINLAND based sleazy thrash band. Massive riffing, clear vocals, thunderous bass and bombastic beats are the formula to the TORNADO sound which is deeply rooted in 80's thrash and a style rooted in 80's sleeze! Releasing 2nd album "Black President" at June 1st, 2015 via WormHoleDeath.
Buy from here:

》iTunes http://tinyurl.com/pmowraz
》Amazon http://tinyurl.com/porvnuu
》Google Play http://tinyurl.com/pykc87l

2. Tornado are a 4 piece thrash metal band from Greece, who released "Fire At Will", their debut album in 2009.

3. Yugoslav/Serbian heavy metal

Neboysha Tasich (guitars, vocals), George Letich (guitars, keyboards, vocals), Steven Bukvich (guitars), Sinisha Tasich (bass, vocals), Philip Zmaher (lead vocals), plus session drummer = Tornado

4. Bulgarian progressive rock band.

5. Tornado is also a Chicago-based DJ.

6. Jamaican based dancehall artist.