Arctic air and the teeth-chattering
wind chill will make it seem like -20C in exposed areas north of the border and -10C on high ground in the north of England.
But it will feel much cooler because of the harsh
wind chill.
Today is expected to be mostly sunny, with a high near 14, with
wind chills as low as minus 19 and winds of up to 25 mph.
The
wind chill dipped to an even more startling 51 degrees below zero.
"Boston will be just 3 degrees (Farhenheit) this morning, with
wind chills of minus 12 or more," he said.
Sun
wind chill values may be 15 degrees below zero.
He added: "Next week will be between 5 to 8 degrees Celsius but there will be an easterly
wind chill."
Met office experts say
wind chill will make it feel even colder.
But the Met Office warned that with the
wind chill, it could feel like -6degC.
With the
wind chill taken into account, last night was expected to feel like -70C, and it will feel like -100C by Tuesday.
The agency said
wind chill is expected to fall as low as minus 14 C in other mountainous areas in Gangwon Province.
Jaw-clenching temperatures to start the weekend throughout the Northeast hit Burlington, Vermont, at minus 1 and a
wind chill of minus 30.