Prestonians have been told to brace themselves for sleet, heavy rain and snow as temperatures plummet.
The Met Office is advising motorists to take care as the weather takes a turn for the worse from Sunday lunchtime onwards.
A yellow weather warning has been issued covering Preston and the surrounding areas until Tuesday afternoon.
The chief forecaster states: “A deep area of low pressure is expected to move slowly eastwards passing close to northern Scotland on Monday night to end up close to the Northern Isles during Tuesday.
“A strong, unstable and cold westerly flow on its southern flank for much of Monday, will gradually veer northwesterly by Tuesday and is expected to bring frequent showers to many parts, these falling as hail, sleet and snow in the warning area.
“Accumulating snow can be expected at low levels in places, especially in Northern Ireland and Scotland, whilst snow is likely to accumulate above about 200-300 m throughout at times. However, by day much of the snow at low levels will melt. Lightning could be an additional hazard.”
Temperatures are expected to fall to just above freezing overnight into Monday and it will not get above five degrees during Monday and Tuesday.