The Brewing Storm (Charmed #25)
Author: Paul Ruditis
Desc: On hearing about a brewing storm the sisters are not suprised to discover that a series of freak weather patterns is a harbinger of danger. Piper Paige and Phoebe learn that the key to preventing this mass destruction may lie in the hands of a young troubled firestarter who's on the run. If they want to avert the natural disaster the Charmed Ones are going to have to go straight to the supernatural source.