The bright sunshine may signal a dramatic fall in temperature as the UK prepares for snow, ice and hail. The Met Office has issued yellow warnings, “be aware”, for Scotland, Wales, southwest and central England, with some areas expecting as much as 10-15cm of snow. A weakened jet stream – previously supplying us with milder, windy conditions – has deepened and moved further south, turning weather conditions across the UK much colder. At the end of the weekend the cold snap may give way to blustery showers across central and southern England, but with the possibility of more snow overnight if the temperature remains low.