Other forms: tempests
Shakespeare's The Tempest begins with one — a tempest, or a violent and windy storm.
The meaning of tempest has expanded over time to include the idea of anger or fighting. A "tempest in a tea pot" means a passionate fight over something that is in fact fairly trivial. For example, a loud argument about whether to use cloth or paper napkins at Thanksgiving could be considered a "tempest in a tea pot" to some.