Detailed Instructions: You will be given a trivia clue, and the category it belongs to. You should answer with the best answer that belongs in the category and is described by the clue. For simplicity, answers should be in all lower cased letters.
Problem:Category: METEOROLOGY 
Clue: Low- & high-pressure systems & tropical moisture set the stage for a 1991 nor'easter nicknamed these 2 words
Solution:
\"perfect storm\"