Forecasters predicted a "wall of snow" will hit the UK today, as they said a storm coming from the Atlantic could threaten sub-zero temperatures.
One expert even believed there was now a risk of "widespread snow" due to some computer modelling - although others said that's unlikely.
He said freezing air from the USA could collide with warmer air from the Gulf of Mexico, meaning the jet stream is supercharged and bringing with it colder conditions.