UK Outlook for Monday 11 Dec 2017 to Wednesday 20 Dec 2017:
Monday will see outbreaks of rain, sleet and snow, most likely across central and southern parts at first, clearing to brighter skies and wintry showers. Further accumulations of snow are most likely in central and northern areas. By midweek, we may see another spell of rain, sleet and snow moving east across many parts for a time. Otherwise, a changeable period with bright spells and wintry showers, these most frequent in the north and west. There is a continued risk of snow accumulations for all areas, either from showers or more organised frontal bands moving in from off the Atlantic. Some strong winds at times, especially in the west and northwest. Probably staying cold, with overnight frost and ice, with perhaps less cold interludes possible, especially in the south.
UK Outlook for Thursday 21 Dec 2017 to Thursday 4 Jan 2018:
Slow-moving or blocked weather patterns are likely to dominate for the rest of December and into the early part of January. This is likely to bring a mixture of colder, drier periods and shorter lived milder, wetter and windier interludes. Snow is likely at times, especially in more northern and central parts of the UK. There remains some uncertainty in regards to which pattern will be most dominant during this period. Overall temperatures will probably be below average, but with some milder spells.
Snowy update from the Meto. Looks like they think Monday's snow will be a central and southern affair.
Bishop's Stortford 85m ASL.