The Euro model has held steady over the last 4 12z runs in forecasting an official SSW on 12/30

Euro Model Run: Date of SSW Wind Reversal (10mb/60N)
12/18 12z: 12/28
12/19 12z: 12/28
12/20 12z : 12/30
12/21 12z: 12/30
12/22 12z: 12/30
12/23 12z: 12/30 pic.twitter.com/HTwqdzn5Bl

— griteater (@griteater) December 24, 2018