During periods of severe weather, the UK Met Office issues severe weather warnings. The warnings are given a colour which depends on two factors: the likelihood of the weather event and the impact of the conditions.
What do the warnings mean?
A yellow warning advises that severely bad weather is possible over the period stated which could affect people in the area. It means that you should consider possible travel delays or disruption. Keep an eye on the latest forecast.
An amber warning advises that there is an increased likelihood of severely or extremely bad weather which could potentially disrupt people's plans and cause travel delays, road and rail closures, interruption to power and the potential risk to life and property. It means that you need to be prepared to change your plans and protect yourselves, your family and others from the impact.
A red warning advises that extremely bad weather is expected. It means that you should take action to keep yourselves and others safe from the impact of the weather. Widespread damage, travel and power disruption and risk to life is likely. You must avoid dangerous areas and follow the advice of the emergency services and local authorities.
In the context of snow, a red warning has been issued when there has been a likelihood of frequent and heavy snow showers which would lead to treacherous conditions in the areas affected. In the past, authorities have advised against all but essential travel when red warnings have been issued.