As anticipated a sudden stratospheric warming has happened throwing the dynamics up there into disarray.
What it will mean for us at the surface is uncertain atm.
A nasty spelly of easterlies in 2 to 3 weeks time?
Maybe, but the interactions between stratosphere and troposphere are not well understood and models are unreliable at that time period ahead.
Watch this space as they say.
Len
Wembury