BBC Weather forecasts that 20-40cm of snow could fall across northern England and southern Scotland from late Saturday into Monday, which could cause “significant disruption”.
Temperatures in towns and cities across the UK were expected to fall below freezing overnight on Friday into Saturday morning, with significantly colder conditions in rural areas. There could be some freezing fog patches in the Midlands and East Anglia.
Saturday will be largely dry but cold with maximum temperatures barely above freezing for many. Later in the day, rain will spread in across southern England and Wales, moving north-east.
This rain will temporarily turn to snow in southern areas and possibly give a small covering in places, especially over high ground. But ultimately, with milder air coming in, it will turn quickly back to rain.
In the area covered by the first amber warning, there will be a more sustained period of snow and freezing rain for Wales and the Midlands.
While there is some uncertainty, 3-7cm of snow is likely, with 15-30cm for the higher ground of Wales and southern Pennines.
Freezing rain – where rain falls on to surfaces below zero degrees and instantly freezes – will bring the extra hazard of icy surfaces.
Milder air will then lead to a rapid thaw of snow and ice in south Wales and the Midlands during Sunday.
In the area of northern England covered by the second amber warning, there will widely be 3-7cm of snow, with 15-40cm over high ground before it begins to ease and clear by the end of Sunday.
Later on Sunday, temperatures are expected to be milder in parts of the country, reaching 13C in London in contrast to Aberdeen where it could be just 2C.
