This has got forecasters heads in a spin. Yesterday, it had gone completely with a warm high pressure area coming in from the south west to kill of any cold air over the south.
This was this mornings run
Sorry its small, but you can just see the North South Split of warm air vs cold.
Now this is 1 hour ago....
Not as bad as 2 days ago, but still showing a massive cold incursion.
Now either the data is corrupt ( does happen sometimes ) or the GFS machines around the globe are playing silly buggers.
Or been hacked by North Korea...