Yahoo News 
Sorry everyone, that three-month long heatwave you heard about isn’t happening
Britain basked in sunshine on Sunday, but don’t get used to it.
Reports over the weekend claimed the welcome warm weather was just the start of a three-month long heatwave.
But if you are on the verge of packing away your winter wardrobe and heading to the shops to stock up on swimwear, don’t bother.
Because that heatwave isn’t coming.
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Sunday was the hottest day of the year, with temperatures reaching 25C at Northolt, and many parts of England enjoyed more than 20C heat.
The warm weekend followed a Met Office report sent to government departments, airports and local authorities, who request weather information so they can plan events throughout the spring and summer.
In the document, the Met Office outlined its guidance for April to June, saying there was a 45% chance that temperatures will be warmer than average in that period this year.
However, that does not mean there will be a heatwave.
The Met Office uses the World Meteorological Organization’s definition of a heatwave, which says it happens ‘when the daily maximum temperature of more than five consecutive days exceeds the average maximum temperature by 5C’.
A Met Office spokesman told Yahoo News UK that the average temperature for the April-June period is 10.3C, and warmer than average could mean more than 11C. Hardly a heatwave.
‘There is a good chance that temperatures will be above average,’ he said.
‘But that is a long way from a heatwave.’
The Met Office said their report wasn’t a public forecast but merely guidance for government departments, airlines and local authorities so they can put contingency plans in place.
As for this week, temperatures will drop by as much as 10C as cooler weather returns, while Easter weekend will be a mixed bag, with rain forecast for Saturday.
