Temperatures are expected to plummet to -7C (19.4F) in some parts of the UK overnight as Arctic winds bring an end to the good weather. The drastic change will see forecast highs of 17C in southern England on Easter Sunday drop to just 2C on Monday morning. Sub-zero temperatures can be expected in parts of northern England, and the mercury could drop to -7C in some areas of Scotland. The forecast came as people flocked to public spaces, including Liverpool’s Sefton Park and Stratford-upon-Avon in Warwickshire to enjoy the sunshine on Easter Sunday. The Met Office forecaster Sarah Kent said: “We will see this plunge of much colder conditions coming in. It’s Arctic maritime air, which does mean it’s coming from the Arctic. “So it’s going to be cold for everybody, but also windy too. The wind chill is going to be significant.” Snow warnings are in place for northern Scotland, with as much as 15cm expected to fall on higher ground. The Met Office’s yellow warnings are in place from 4pm on Sunday until 10am on Tuesday for Scotland, with winds of up to 70mph forecast. There could also be snow showers in coastal areas of eastern England, parts of Wales and Northern Ireland on Easter Monday. Southern England can expect some sunshine and highs of 7C later in the day, but gusts of up to 30mph will make the temperature “feel like” -1C, Kent said. Temperatures in some parts of the UK reached nearly 24C on Wednesday, a high unlikely to be repeated on Easter Sunday. Kent said: “Today is a lovely day for an Easter egg hunt in the back garden, whereas tomorrow if you were doing one you’d probably want to wear three jumpers.”