Three days of thunderstorms could be in store for Lancashire and Cumbria, according to the Met Office.
Yellow thunderstorm warnings for all parts of the UK have been issued for Monday through to Wednesday. The warning states: “Some places are likely to see severe thunderstorms early next week – but there is significant uncertainty in location and timing.”
Dan Harris, Met Office deputy chief meteorologist, said some places are likely to be hit with up to 80mm of rain in just a few hours.
He said that “the ingredients are there” for them to strike, but “it’s just too early to pinpoint the details of exactly where and when thunderstorms will occur”.
A spokesperson for the Met Office said: "Areas of thunderstorms are increasingly likely to develop over the south of the UK or nearby continent late in the weekend or early next week, and will generally track north or north-westwards, potentially affecting all parts of the UK at some points during this period.
"Whilst the most intense thunderstorms, in some instances associated with large hail, will most probably be those triggered by the high temperatures of the day over England and Wales, other areas of storms producing heavy rainfall and frequent lightning could reach further north at times over Scotland and Northern Ireland.
"These could occur at any time of the day. Of the area highlighted, at present the west of Northern Ireland and west of Scotland seem less likely to be affected than other areas, but still could not be ruled out. Where the storms occur, rainfall totals of 30-40 mm could fall in an hour, with some locations potentially receiving 60-80 mm in 3 hours, although these will be fairly isolated."
What to expect