Following a sunny warm weekend locally things are forecast to change overnight for large parts of the UK as Yellow weather warnings for thunderstorms have been issued by the Met Office covering Northern England, Scotland and Northern Ireland from Midnight through until 1pm on Monday, with forecasters warning the storms may cause disruption and damage to buildings.
The Met Office said "sudden flooding" could lead to road closures and there is a chance that power cuts and loss of communications could occur in some effected communities.
Thunderstorms are expected to develop over western parts of the UK and move northeast during the second half of Sunday night becoming organised into Monday morning.
Although not all parts of the warning area are expected to see them, an area of increasingly organised thunderstorms is likely to produce a combination of frequent lightning, heavy rain, hail and short periods of strong winds.
Some torrential downpours are likely, with 20-40 mm in places, and a potential for 40-60 mm of rain to fall in 1-2 hours very locally, with hail up to 2 cm in diameter. Thunderstorms are expected clear towards the northeast by Monday afternoon.