A yellow warning has been issued for sudden ice slippage during Christmas Day, the worst is expected in the afternoon and evening.
The slip can become invisible in places, which is called a black slip. This treacherous phenomenon means that roads can look dry even though they are slippery:
– There will be slower traffic and accidents due to the dangerous surface, says meteorologist Lovisa Svanberg.
Most recently yesterday, there was an accident on the E4 outside Nyköping as a result of the slip.
The slip has a firm hold on the roads and can stay until tomorrow, according to Svanberg.
See which areas are worst affected in the player above.