BBC Weather’s Carol Kirkwood has warned of thunderstorms from a cold front coming in from the west as a huge weather system blankets Northern Ireland in rain. Meanwhile, hot air is being dragged across southern England from the continent. Temperatures will reach 27C in London and Hull on Tuesday.
Ms Kirkwood said: “From today you will start to notice the temperatures rising more widely but it’s also going to turn much more humid and that’s not just by day but by night as well.
“We’re dragging up this continental air across our shores but Scotland and Northern Ireland will only briefly have some warmer weather.
“Heading through the weekend, we will see some change with weather fronts moving in from the west.
“We’ll see some thunderstorms, we’ll see some rain in comparison to what we’re looking at now.
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“I don’t think it will break the all-time record.
“Today, we’ve got rain across Northern Ireland and other parts of Scotland moving northwards.
“There will be a lot of warm sunshine. Temperatures up to 27C in London and in Hull.
“It’s not going to be a cold night, temperatures are only going to fall between 12C and 16C.”
Tuesday’s top temperature is expected to be around 29c in the South Wast of England, with other areas quite widely getting into the mid 20s, the forecaster said.
The hottest day of the year so far was 28.9 degrees reached last month, and Mr Miall explained: “It’s likely tomorrow will beat that in the South, do it again on Wednesday and then again on Thursday.
“Thursday will probably be the hottest day in the region of 33 or 34 degrees”, but he added “that’s not quite the June record from 1976”.
“Although it’s fairly uncommon to get 34 in June at the moment, it doesn’t look like we’re going to break any of the records.”