It's setting up to be super-chilled over Greenland in the next week. The cold there is not as consistent generally as Northeast Canada in mid-winter, due to various factors (oceanic etc)but because most of Greenland is very elevated (5-10,000 feet), it gets incredibly cold, very quick.
It's rare enough these days for the set of synoptics needed to get a fairly direct flow from Greenland to Ireland, in Winter, during a very cold spell in Greenland. True cold polar-maritime weather (originating to the northwest of Ireland as against the far Arctic north) is one of the rarest spells of weather in Ireland these days.
It used to be fairly common in springtime in the 70s-mid 90s. Hardly ever since