A frontal system associated with an area of low pressure will rattle in on a strengthening jet, breaking the ‘blocked’ weather pattern of late. The frontal system will slide southeastwards across all areas late Sunday into Monday with colder air digging in behind across Scotland and Northern Ireland.
Showers will turn increasingly to snow, initially above 200m in Scotland, before the snow-line drops with accumulations of snow expected to lower levels of Scotland and Northern Ireland late Monday night into Tuesday. Snowfall accumulations will range from 10-15cms over higher ground with 3-5cms to lower ground away from immediate coastline. The showers will be heavy and at times thundery in nature with frequent lightning, more so across NI & W Scotland including the W Isles of Scotland.
The snow risk continues across these areas throughout the working week at least. The ‘snow shower risk’ will filter south into England and Wales later Tuesday and into Wednesday (N England, NW England, Wales). A separate watch will be issued for these areas later.
Issued by Lewis – Weather Watch map can be found below.