Violent thunderstorms with huge downpours will today tear across the UK as the wintry blast continues.
Temperatures are set to plunge to single figures in some parts of the country and frost will return overnight, forecasters say.
The Met Office told Mirror Online heavy bursts of rain will sweep across the country from the west and around a week's rainfall will hit some parts of the southwest in just a few hours.
"There will be potentially heavy downpours to hit the southwest, particularly Cornwall and maybe Devon, this afternoon.
"They are likely to be scattered, so heavier in places and in other areas not much at all.
"There could be around 15mm (0.5inches) in some parts and less in other areas," Helen Roberts, Met Office forecaster, told Mirror Online.
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Thunderstorms are expected to rock mid-Wales, south Wales, West Midlands and the southwest this afternoon.
Scattered showers - less heavy - will fall across parts of the southeast.
Yet conditions may threaten to disrupt travel.
The average rainfall for the whole of April is typically around two inches for most of the south and parts of the Midlands.
However, in some places the figures is around the 1.5inch mark.
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Yet already many commuters woke to fierce downpours already this morning in parts of south Wales, the southeast and Midlands. Herefordshire, Gloucestershire and Monmouthshire were particularly hit overnight.
But the north will remain largely dry and sunny, the Met Office added.
Temperatures will fall today and tomorrow to single figures in rural areas.
The mercury will plunge to 4C in Buxton, Derbyshire, and Scunthorpe, Lincolnshire, today.
And tomorrow it'll be just as bitter in the East of England.
Norwich and the surrounding areas will see brutal April temperatures of just 6C - half the maximum daytime temperature typically seen in this month.
In recent years, the UK has basked in balmy temperatures of 13C in April.
"We are pulling cold air in from the continent.
"It'll therefore be cooler, particularly overnight.
"Nightime temperatures will fall so we will see overnight frost," Ms Roberts added.
But forecasters insist a glorious heatwave is on the way this summer .
The Weather Outlook's Brian Gaze recently said: "With computer models strongly favouring a warm spring, there is potential for the record for the hottest spring to be challenged.
"Highs of 26C are likely in April. Plumes of warm air from Africa are expected."
