Drivers are being warned of difficult conditions on the roads, with areas of sleet and snow moving southwards.
Forecasters say 2-5cm of snow is likely over higher ground, with around 1-2cm at lower levels.
The warning is in place until 6pm on Saturday.
M6 reopens after vehicle transporting sheep overturns following crash between Preston and Lancaster
The Old Vicarage Care Home: special measures status for Lancashire care home where resident was left lying on floor after falling out of bed
Lytham St Annes care home boss appears in court after death of residents
Preston Brick Veil Mosque inquiry closes as debate rages over whether the place of worship should be permitted
M65 motorway crews strimming verges until 4am keep residents awake at night
The Met Office said cnowfall may cause tricky travel conditions in places.
What to expect
Some roads and railways likely to be affected with longer journey times by road, bus and train services
Some injuries from slips and falls on icy surfaces
Probably some icy patches on some untreated roads, pavements and cycle paths
It is thanks to our loyal readers that we can continue to provide the trusted news, analysis and insight that matters to you. For unlimited access to our unrivalled local reporting, you can take out a subscription here and help support the work of our dedicated team of reporters.