Borehamwood could be under a blanket of snow on Friday.
The Met Office has warned of disruption to the morning rush hour after it issued a weather warning for snow.
The Met Office’s chief forecaster said: "An area of low pressure is expected to move eastwards on Friday. There is considerable uncertainty in its track and therefore on the risk and location of any snow."
The 'yellow' snow warning is in place between 12.05am and 12pm.