Cold air from the east has gripped the country and temperatures over the next 24 hours are not expected to climb much above freezing.
A band of rain is expected to track across the country during Saturday, which will clash with the cold air.
The Met Office have warned that this could lead to freezing rain, ICE and snow.
Merseyside has been placed on a yellow severe weather warning during 9am Saturday – 9am Sunday.
The forecaster warns that the severe weather could lead to travel disruption, risk of injury from slippery surfaces and trapped vehicles due to snow.
The Met Office say: “Freezing rain is expected to develop during Saturday, lasting into the early hours of Sunday.
“This may result in the formation of ice on roads, pavements, trees and other structures.
“Freezing rain is rare in the United Kingdom, but when it does occur impacts can be severe.
“This is due to the fact that it can form very quickly, it can be difficult to see, and is incredibly slippery.
“Freezing rain is likely to change to snow before it dies out across parts of Scotland, bringing some accumulations of 2-5 cm.
“The freezing rain and snow will be accompanied by strong southeasterly winds which will pose an additional hazard to travel, in particualr over high ground.”
Chief Meteorologist Will Lang said, “Saturday’s weather brings a range of winter hazards with very dangerous travelling conditions likely in some places.
“In addition to snow, freezing rain will bring widespread ice to northern England and Scotland on Saturday afternoon.
“Freezing rain forms when rain freezes on impact as it hits a cold surface – it is quite rare in the UK and when it does occur, the impacts can be severe.
“Many will know it as black ice and the danger is it forms quickly, is difficult to see and is incredibly slippery.
“Where it does occur, this will make walking, cycling and driving challenging, so we are urging people to check the latest weather forecast and warnings and to take extra care when walking and driving.”
Freezing rain is a type of liquid precipitation that falls as a supercooled water droplet until it strikes a cold surface, at which point it freezes almost instantly.
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