The winters of 84-85, 98-99, and 01-02 each had an early winter SSW <AND> are a good QBO match to this winter (-QBO at 50mb in early winter with +QBO descending from the upper stratosphere).
— griteater (@griteater) January 4, 2019
84-85: Early Jan SSW
98-99: Mid Dec SSW
01-02: Late Dec / Early Jan SSW pic.twitter.com/oRiWUIK3DG