I wonder if Met Éireann will end up naming the low that runs across Northern Ireland later on Saturday? It looks like the Met Office are more concerned about the snow from it over SE Scotland and NE England. This low is not hanging about though, so I can’t see that being a big problem. The latest GFS run does have the low undergoing rapid cyclogenesis, deepening by 30 hPa by the time we get to 06 UTC on Sunday morning (fig 1), and more markedly than do the UKMO in their latest forecast charts (fig 2).
UKMO Chief Forecaster’s assessment
“Rain and hill snow, accompanied by some strong winds, is expected through Saturday evening, clearing eastwards overnight. Above around 200 metres, 2-5 cm of snow may accumulate although there is a small chance of 5-10 cm falling over the Southern Uplands. As skies clear from the west overnight into Sunday morning, ice is expected to form on any untreated surfaces“.