Fwiw, the GFS ensemble is forecasting an extreme 1.5-2σ +PNA event in early Dec (1950-2000 climo).

In NCEP Reanalysis, there has only been ONE day since 2001 where the PNA was greater than +2σ in December (Dec 9 2014). The coming +PNA event is insane.#climate #ncwx #scwx pic.twitter.com/VqD5FEKngB

— Eric Webb (@webberweather) November 24, 2020