Whilst hunting for cold just now I notice Svalbald -21C, East Greenland -36 C and a 1000-500 mb thickness cold pool of 474 DM just north of Lapland. The intense high forecast to be to our east in a few days time is expected to suck up unusual warmth. If skies remain clear under the high an inversion is likely to develop with cold possibly foggy nights and potentially warm days. Where any fog forms it could be slow to clear with temperatures close to freezing in these parts. Along the south and east coasts where more of a breeze is likely temperatures are likely to be suppressed by the cool sea but mixing with the warm air aloft due to the breeze may alleviate the effect of the cold sea. It will be very interesting to see how the high behaves with such cold air surrounding it and a island of unusual warmth covering the UK.