Temperatures are set to plummet next week, bringing a risk of “substantial snow” and the chance of wintry hazards.
The Met Office said a northerly airflow is expected to bring much colder air on Sunday, with brisk northerly winds likely developing widely across the country and bringing a risk of snow showers.
Temperatures will remain cold and there will be a marked wind chill, especially in the north.
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The forecaster said there is also a risk of unsettled weather pushing in from the south, which could cause a band of snow and sleet where it meets colder air across the country.
Widespread frosts will continue overnight, with a risk of ice in some places.
“There is the potential for some disruptive snow through the middle to latter part of next week as warmer Atlantic air attempts to push in from the southwest,” said Tony Wardle, a Met Office deputy chief forecaster.
“As this occurs, some substantial snow could fall in some places, but the details of that are uncertain at the moment.”
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The Met Office also said there is an “increasing risk of something potentially disruptive at some point in this period,” but said confidence about the timing is low.