Driffield School is to close at 2pm today (Mon) because of the threat of snow.
Head teacher Simon Jones took the decision after the Met Office issued an amber warning for heavy snow across the region.
The school has 18 buses transporting approximately 900 students across a wide ranging catchment area. Most staff live outside the catchment area.
Mr Jones said: "Passenger Services need time to organise the early pick up and on balance I believe this is the most sensible course of action given our duty of care for students and staff.
"We do have 23 students sitting A Level exams during the afternoon. These will go ahead as normal but with an earlier start if possible."