An intensifying low pressure system?
A dryline passage?
A 500 mb ridge?
A gustfront?
George Bush?
A dryline passage?
A 500 mb ridge?
A gustfront?
George Bush?
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An intensifying low pressure system. Think of the Great Blizzard of 1978. You can see the deep low pressure system that was associated with this blizzard on they surface map: http://en.wikipedia.org/wiki/File:Januar…