I have to say the charts are stunning today...and already just 120-144 hours away. Key to this is the extension of the arctic high. This allows for a direct arctic and prolonged source and stabilises the Greenland block.
The door has been banged 4 or 5 times now in recent weeks. Each northerly is getting that bit colder.
I see we are bringing down -40c (500Hpa) air..such deep cold is a recipe for disturbances and polar lows.
This week's recent northerly and light snowfalls was a taster.
The outlook is a wintry one.
Originally Posted by: Gusty