A red warning is in place for blizzard conditions which could lead to significant drifting.
Schools have been closed, and the States police are urging drivers to only travel if the journey is essential.
Chief Inspector Chris Beechey said: ‘We are expecting a similar amount of snow to that which we saw five years ago and as most people will remember it caused quite significant disruption to normal island life.
‘Because of the combination of snow and later in the day freezing rain we are asking people not to venture out unless necessary. The conditions on the road are predicted to be very dangerous and it is not worth the risk.
‘We would also ask people to think about any elderly or vulnerable neighbours and perhaps pop in to check on their welfare.’
If your journey is necessary please drive according to the conditions using the tips below.
- Snow and ice can make driving treacherous: try to manoeuvre gently and avoid sudden braking or acceleration. Drive in the highest gear possible to avoid wheel spin, and allow extra space between your vehicle and the vehicle in front.
- It can take ten times longer to stop in icy conditions than in dry, fine weather, so drive slowly
- If you do have to brake get into a lower gear earlier than normal, allow your speed to fall and use the brake pedal gently. If you start to skid ease off the accelerator, but do not brake suddenly
- Prepare before you set off on your journey: make sure you clear all windscreens and windows; tell someone where you are going; make sure that you keep essential items in your car in case of a breakdown such as a blanket, warm clothing, a hot drink and a torch are a good idea.