England and Wales are said to have enjoyed the warmest day of the year so far - but forecasters warned some areas may see SNOW on Friday.
The south saw the highest temperature of the year in England so far this year of 18.6C (65.4F).
But Met Office forecaster Alex Burkill warned people to make the most of the warmth as some areas could even see snow before the week’s out.
Mr Burkill said: “The relatively warm weather is not going to last.
“Wednesday was probably the best day in terms of temperatures for a while.
“Thursday will be a similar sort of day with some showers around. Temperatures will reach 17C, maybe 18C. Further north it will be cloudier and cooler, but largely dry.
“But by Friday things are going to get more complicated.
“We have a warm front coming up from the south and a cold front coming down from the north, so Friday won’t be a good day weather-wise.
“There will be rain, some heavy, and some areas in the north could see some wintry elements - sleet or even snow.
“There will be some rain overnight on Friday, but it should clear away into Saturday, and Sunday should be mostly dry for many.”
He added: “It doesn’t look like temperatures will be as warm over the weekend, with a high of around 12C (53.6F).”