Thanks for your reply. 

This post was nothing to do with normal 'run of the mill' snow fall in the UK or northern Europe.

Models trying to push winds into more of a north-westerly from around a week's time. I doubt it would bring much of note, but it would feel more seasonal (if it came off, of course).

Yes very good run first significant snow for northern hills. 

16-dayer continues to move cold air into  NW Europe, and although temps are still above average to the NE, some ultra-cold air appearing there in week 2 should change that. N Scotland also colder in week 2, but not connected. Large amounts of pptn for NW coasts of Europe week 1, still hanging around in week 2 plus more in the eastern Med by then.

GFS shows LP running past NW Scotland to Mon 23rd with rather closer approach than yesterday, mild SW-lies alternating with cod NW-lies. HP then pops up Rockall 1030 mb Thu 26th and briefly adopts a nice blocking position over Iceland before ridging down from there to SE Europe Sun 29th with UK on its western edge.

GEFS temps oscillating high then low and repeat until Fri 20th; after which mean of runs is near norm but not meaningful as so little agreement. Some rain throughout with heaviest around Mon 16th and Fri 20th in the S but at any time in the N. Double-digit snow rows for Inverness around the 20th, still some meaningful figures after that.

ECM also has the train of LPs passing Scotland but the last of these sticks over Scandi and introduces a strong N-ly Mon 23rd.

BBC last night presented a large HP off Ireland for middle of next week as an alternative to persistent LPs, but with low probability - don't know whether that scenario survived.

The models are starting to look a little more promising as they go further into FI this morning, although there will no doubt be more changes in the coming runs. They are at least starting to show some signs of what the MetO updates have been suggesting for the period approaching the start of December.

Increasingly wintry for the months end.

This setup has been in the charts for 2 days now...

Might we get some Pennine Skiing before Scottish Skiing (lockdown permitting)? 

possibly, but in the reliable timeframe there is plenty of wet and windy weather to get through in the next few days. 

Yeah I'm finding it hard to get excited about the latest round of mid-range outputs as the only thing the "northern blocking high" seem to be doing is forcing compact but active lows to run further south across the UK = yet more unwanted wet and windy conditions to England and Wales, although it may bring some wintry weather to the Scottish Highlands for a few days. 

Nice cooldown  in the east..

UK might get lucky in December

Don't get too excited -  a bit of snow on northern hills is about a par result for mid-November. Meanwhile, instead of hopecasting, try the computer version:

Jetstream generally W-ly across some part or other of the UK for the next week and working to a crescendo Fri 20th in the N and the following day further S. some looping follows but a strong blast from the SW is back Thu 26th covering all UK before a quieter spell with a loop encircling the UK. The positive for cold weather fans is that once it's passed over the UK, it's getting diverted, mostly S, sometimes N, and blocked from travelling on into continental Europe.

GFS has a mobile pattern from the Atlantic with LPs rushing past the UK and for most days a SW=ly flow of air. Occasionally a depression dips into the N Sea and introduces a brief but usually strong N-ly - see Thu 19th, and especially Sun 22nd 970mb, the latter being strong enough to push the Euro/Scandi HP out of the way S-wards for a couple of days.

GEFS has brief bursts of mildness Wed 18th and (for the S) Sun 22nd, as LPs approach with SW-ly fetch on leading edge, but below average between and after. Little agreement between runs from Wed 25th. Rain on and off throughout, heavier in N and W. 

ECM agrees to Thu 19th, but then quite different; it misses out the deep LP shown by GFS on Sun 22nd, keeping the Scandi HP in place and developing a depression running SW to Cornwall by Tue 24th

Long before that (on Friday), after a prolonged mild period, this would be a bit of a shock here 

Would mean this month continuing as a virtual repeat of November 2015 only worse.

Mild SW'lies during the first week followed by a switch to a repugnant SE'ly gloomfest in the second week. By mid-month it was the worst Autumn I had recorded for lack of cold... until now.

Then the weekend of 21st/22nd November saw a cold snap and snow which of course turned out to be the coldest and snowiest spell of the "winter". However the lenticular clouds at sunset on the 21st were more impressive than the snow.

Was a further dusting at the end of November 2015 before six weeks of abject horror set in 

You sound surprised.

All looks fairly typical mid-Nov to me.