Storm divided a party (7)

I believe the answer is:
tornado
'storm' is the definition.
(type of weather)
'divided a party' is the wordplay.
'divided' becomes 'torn' (similar in meaning).
'party' becomes 'do' (do is a kind of party).
'torn'+'a'+'do'='TORNADO'
(Other definitions for tornado that I've seen before include "Tempest'" , "Severe wind" , "Cyclone, twister" , "Destructive windstorm" , "This is quite a blow" .)