By Paul Homewood
23 February 2018:
Conditions over the weekend and into the early part of next week will become increasingly cold, possibly exceptionally cold.
Yellow National Severe Weather Warnings for snow are in force for parts of eastern and southeast England from 4pm on Monday and for large parts of the UK through Tuesday and Wednesday.
Snow showers are expected to develop widely during the start of the week, with some locations likely to see accumulations of 5 to 10 cm. Although other sites may see less frequent showers leading to much smaller accumulations up to 2 cm.
The very cold conditions, which are likely to be the coldest spell of weather for several years, are likely to remain in place for the remainder of next week. The cold easterly wind will persist bringing a significant wind chill which will make it feel several degrees colder than thermometers indicate. Even without the wind chill some locations will struggle to get above 0 °C by day, with night-time temperatures ranging down to -8 °C quite widely.
16 February 2018:
There is increasing confidence that the recent Sudden Stratospheric Warming above the North Pole could lead to prolonged cold conditions over the UK, increasing the risk of easterly wind and significant snow.
Prof Adam Scaife, of the Met Office Hadley Centre, said: “Signs of this event appeared in forecasts from late January and in the last few days we have seen a dramatic rise in air temperature, known as a Sudden Stratospheric Warming, at around 30km above the North Pole. This warming results from a breakdown of the usual high-altitude westerly winds and it often leads to a switch in our weather: with cold easterly conditions more likely to dominate subsequent UK weather.”
These events are well reproduced and can be predicted in our computer models and although there is still uncertainty around the outcome of this particular event, there is an increased risk of cold conditions in the latter part of February, including the possibility of heavy snowfall.
26 January 2018:
The 3-month outlook is based on:
- Several numerical observations systems
- Expert judgement
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February 24, 2018 at 09:15AM