Early December chill and frost gives way to blustery, milder Atlantic air this week.
There has been a cold and frosty start for England and Wales on Monday morning with temperatures inland down to -7C. At the weekend, Scotland and Northern Ireland had chilly sunshine and frost with the Highlands down to -10C. This morning a warm front is skirting over Scotland bringing early rain and more cloud so a milder start.
For much of the UK, it will be a quiet, fine day with high pressure allowing settled weather for the start of the week. Gradually a mobile westerly flow off the Atlantic picks up and it turns blustery and milder for everyone this week.
It will stay dry for most with clear skies and sunshine in the SE, a bit more cloud across the rest of England and Wales but still sunny or bright. Feeling cool at 3 to7 C but with hardly any breeze. For Scotland, most of the rain will be in the west, over the Western Isles and NW Highlands. Rain will reach over to eastern Scotland this afternoo0n and there will be a good deal of cloud and a milder feel than at the weekend. 6 to 8C with a westerly breeze, strong for the Hebrides. Northern Ireland will have a light west wind, temperatures around 7C and cloudy skies. There could be a little patchy rain along the north coast but overall a fair day.
NW England will also turn cold under clearer skies. The high pressure begins to slide eastwards over Europe, but Tuesday looks fine, quiet again. Sunshine for England and Wales with lighter winds but still more cloud for Northern Ireland and Scotland with a moderate SW wind.
There are concerns for western Scotland and a Met Office yellow warning for Rain, Thursday into Friday. "Persistent heavy rain followed by showers are likely to produce some localised flooding and travel disruption. The rain will be accompanied by gale force southwesterly winds, with potential for gusts of 55-65 mph around coasts and hills. The rain will turn more showery overnight though further heavy and prolonged showers are likely on Friday morning. 40-60 mm of rainfall is expected widely across the warning area, but nearer 70-80 mm over the West Highlands and a few prone mountain locations could exceed 100 mm within a 30 hour period."
A cold front then approaches for the middle of the west from the west bringing more cloud and outbreaks of rain, even hill snow for western Scotland. High pressure manages to keep southern Britain calm and dry and the frontal rain only creeps over Northern Ireland into Cumbria by Wednesday afternoon. It will be windy in the far north but by Thursday more areas see brisk winds. Kent and London, Essex and Sussex keep the very light winds but for Wales, Belfast and Glasgow there will be a fresh SW wind as a new, developing low whistles through.
By Friday everywhere will be blustery with bands of rain from the Atlantic. Quite a change from the clear, cold frosty weather we have seen.
A look ahead to Polling day for the General Election 2019 weather. A brutal cold northerly bringing Arctic air and snow showers from the NW is on the current GFS chart. Could easily change but still a risk with a mid-December election.