Strong vortex incoming...?

Interesting to see continued prediction from GEFS & GFS showing stronger-than-normal U10-60 into November. 41.2 m/s is often considered a threshold for a “strong vortex event” (https://t.co/CydLLiUMe3).

A reason for strong +AO/NAO seasonal forecasts? pic.twitter.com/YTgw8tYvBX

— Dr Simon Lee (@SimonLeeWx) October 25, 2019