The Met Office warnings for snow and ice began at 3am today for central Scotland and the North East, expanding to cover more of England tomorrow.
However, we will see a recovery in temperatures and thaw over the next few days, as we lose the bitter easterly winds and a westerly flow develops by mid-week, bringing in milder air from the Atlantic.
"The snow has been really heavy, really disruptive, really caused some travel difficulties in Devon this morning", he told his 4,000 followers.
The Met Office has also issued warnings for snow and ice in the North, Midlands, East and South East on Saturday, and the whole of England on Sunday.
Between 00:05 Monday 19th and 10:00 Monday 19th, ice is likely to form on untreated roads, pavements and cycle paths.
Warning: Roads are likely to be affected.
Turning more unsettled thereafter with spells of rain and strengthening winds, although with temperatures recovering closer to average.
Drivers have also been urged to be prepared before setting out on journeys this weekend, with Highways England advising motorists to avoid trans-Pennine roads "if possible".
The heaviest snow showers are expected across south-western areas, but conditions will ease throughout the day and there could be sunshine in some areas.
"Tonight there will be further snow in places at first". 'Some parts will stay below freezing all day... it is probably the coldest day of the lot, ' he said.
He added that higher ground could see as much as 25cm of snow, while lower levels could see 5-10cm or even 10-15cm on Sunday.
"Some showers sink south through central and eastern England".