TEMPERATURES are set to plummet over the Bank Holiday Weekend, as cold air plunges down from the arctic.
Forecasters say that parts of Britain will experience heavy overnight frosts, with the north of the country facing a windchill factor of -5C and the potential for snow on hilltops by the end of the week.
In Gloucester, the Met Office predicts showers or long spells of heavy rain with thunder at times, throughout Thursday.
Drier, cooler and brighter conditions are expected to follow through Friday with cold overnight frosts possible.
The weekend is due to be dry and bright but with overnight frost.
Bank Holiday Monday is expected to start cold but turning sunny with temperatures of up to 19C in central and western areas.
The impending cold snap follows one of the mildest winters in recent years, although the wettest January for 250 years led to widespread flooding.