The yellow weather warning means 1-3cm of snow could accumulate at low levels, with as much as 5-10cm possible in higher levels.
Residents have been warned wintry showers may cause travel disruption tonight (January 22) and Saturday morning (January 23), with icy patches increasing the likelihood of accidents and injuries.
The warning is currently in place from 4pm today until 10.30am tomorrow (January 23).
It covers all of Lancashire, including Preston, Lancaster, Blackpool, Burnley, Blackburn, Accrington, Rossendale, Chorley, and Skelmersdale.
A spokesman for the Met Office said: "Showers will continue at times across many areas, these will consist largely of rain and sleet at low levels across southern England and southern Wales and near coasts but will be of sleet and snow elsewhere.
"These will bring a cover of snow in places. 1-3 cm could accumulate at low levels, mostly across Northern Ireland, Scotland and northern England but as much as 5-10 cm of additional snow may accumulate at higher levels of these areas.
"Clear skies between showers will also bring the threat of ice."
Here's what to expect, according to the Met Office:
- Probably some icy patches on some untreated roads, pavements and cycle paths, increasing the likelihood of accidents and injuries
- Some roads and railways likely to be affected by snowfall, with longer journey times by car as well as bus and train services
Here is the full Met Office weather forecast for the North West:
Today (January 22):
A cold start to the day with frost for many and snow over hills. Scattered wintry showers, heavy at times, with sunny intervals throughout the day, and feeling cold with a breeze. Maximum temperature 5 °C.
Tonight (January 22):
Further wintry showers tonight, falling as snow for some, especially over higher ground. Clear spells between showers with a widespread frost and a risk of ice. Feeling cold. Minimum temperature -2 °C.
Saturday (January 23):
Another frosty start with further wintry showers turning heavy at times and interspersed with clear spells. Snow falling over higher ground with a potential of reaching lower levels too. Cold. Maximum temperature 4 °C.
Outlook for Sunday to Tuesday (January 24 - January 26):
Sunny spells and wintry showers on Sunday. Drier with sunny spells on Monday. Heavy and wintry rain on Tuesday. Feeling cold with risk of frost and ice throughout.
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