West Yorkshire braced for further snowfall
A weather warning has been issued for West Yorkshire, with up to 10cm (4in) of snow expected to fall overnight.
The Met Office said Friday's snow showers would continue into Saturday, with most of it falling on hills.
Motorists were told there was a risk of significant travel disruption through the night and on Saturday morning.
Wetherby Racecourse will be inspected on Sunday to assess whether Tuesday's National Hunt meeting can go ahead.
The venue is covered with snow and clerk of the course Jonjo Sanderson was pessimistic about the chances of the fixture beating the elements.
He said: "There is not enough optimism in that forecast to suggest we'll be racing on Tuesday I'm afraid."
Meanwhile, the Yorkshire Ambulance Service said difficult weather conditions posed problems for their crews.
A spokesman said: "When temperatures plummet and snow and ice are on the ground, they traditionally see a marked increase in patients with breathing difficulties, weather-related incidents [such as] slips, trips and falls and road traffic collisions - all of which put additional pressure on their service.
"We have plans in place to help us ensure we can continue to operate in the adverse conditions but [we] ask that the public also make their own plans to ensure they don't need to call us unnecessarily for assistance."