These kind of massive changes to a planetary pattern inside day 10 by our highest performing NWP suite are a big reason why I've obsessed over subseasonal teleconnections for most of the last 10 yrs.
— Eric Webb (@webberweather) December 15, 2021
If you know what you're doing, you can often see this coming from a mile away pic.twitter.com/T9aRJmTowU