A yellow warning of snow has been issued for Lancashire.
Met Office experts have issued the warning, which covers most of the North West of England.
It is valid from 11am on Saturday until 6am on Sunday, although forecasters say the snow risk for parts of the North West should diminish through Saturday evening and overnight.
They say between one and 3cm of snow are likely at low levels, and say ice will become a hazard once snow clears.
A statement from the chief forecaster said: “A frontal zone moving eastwards into Britain on Saturday will run into and stall against the cold airmass which became established over the UK earlier in the week.
“This allows rain at the leading edge of this frontal zone to turn to snow and persist for several hours before the frontal zone weakens during Sunday, allowing less cold conditions to start developing and some of the snow to start melting.
“This snow is expected to fall along a relatively narrow corridor, perhaps only 100 miles wide, which means that some areas within the warning area may escape much of the snow.
“Meanwhile, where snow is limited or rain occurs instead, icy stretches may develop on untreated roads as rain and snow starts.”