The Met Office has issued a severe weather warning for snow in Lancashire.
Heavy rain on Wednesday (March 22) morning is likely to turn into snow bringing difficult travel conditions at the busiest times.
The warning, valid from 3am until midday, also states that surface water and slush may cause problems elsewhere.
The Met Office chief forecaster said: “An active frontal system will move northwards into northern England on Tuesday night and will become slow-moving on Wednesday.
“Initial heavy rain could well turn to snow in places as it encounters cold air, although there is uncertainty in the exact locations likely to be affected.
“The snow should ease from the south during the morning and become confined to the north of the warning area.”