Steve
Any chance of putting a post together explaining this tweet from IF and matching its content to what you are seeing in the models.
Fergie
‘Yup. The net outcome, as UKMO explain well, is how major anticylonic flow by Fri across NE Russia leads to a shift of stratospheric polar vortex position to the SSE, resulting in a marked reconfiguration in the N hemispheric pattern.’
Cheers