I'd like to emphasize that I certainly did mean to be disrespectful to Shropshire, and that the events of 2009/10 and 2010/11 indeed showed him to be a deluded loon. Whether the other 28 recent winters were blowtorches or hairdryers is completely irrelevant. They're just noise. As long as this happens - twice! - there is no fundamental change towards mildness in winter. None.
Snow and low temperatures, December 2010
From late November to Boxing Day 2010 the UK experienced two spells of severe winter weather with very low temperatures and significant snowfalls.
The first of these spells lasted for two weeks from Thursday 25 November to Thursday 9 December and saw persistent easterly or north-easterly winds bringing bitterly cold air from northern Europe and Siberia, accompanied by snow. Eastern Scotland and north-east England saw the most persistent and heaviest snow, which accumulated to depths of 50 cm or more across the higher ground by the end of the spell. However, lower lying areas were also affected and the snow increasingly spread to other parts of the UK, so that by early December many areas of the UK were under lying snow. Temperatures struggled to rise above freezing during the day and there were very severe frosts at night. Temperatures widely fell below -10 °C on several nights and on occasion below -20 °C in northern Scotland.
This spell of snow and freezing temperatures occurred unusually early in the winter, with the snowfalls judged as the most significant and widespread in late November and early December since late November 1965.
The period from 9 to 15 December saw milder and quieter conditions with a gradual thaw of lying snow. However, a second spell of severe weather began on Thursday 16 December as very cold Arctic air pushed down across the UK from the north. Snow showers affected the north and west on Friday 17 December, while there was heavier snow across southern England and Wales on Saturday 18 December. Further heavy snow affected south-west England on Monday 20 December. The UK remained under bitterly cold Arctic air until Boxing Day, with day time temperatures again failing to rise above freezing and very severe frosts. While there was little further snowfall, lying snow remained until 26 to 27 December.
The second spell of snow and freezing temperatures has been judged the most significant such spell in December since 1981, although late December 2009 to mid-January 2010 (the previous winter) were also broadly comparable to both these spells.
More information about the
Overall, the prolonged freezing conditions resulted in an exceptionally cold December across the UK: the coldest December in the last 100 years and the coldest across central England since 1890. Indeed, this was the coldest month in the UK since February 1986, and in Northern Ireland, the coldest individual month of the last 100 years. Despite a mild first half, the UK also experienced the coldest November since 1993 as a result of the very cold last few days.
https://www.metoffice.gov.uk/climate/uk/interesting/dec2010
2 miles west of Taunton, 32 m asl, where "milder air moving in from the west" becomes
SNOWMAGEDDON.
Well, two or three times a decade it does, anyway.