A cold front is the boundary of an advancing mass of cold air. These are shown on weather maps by a line with triangles -often coloured in blue.
Characteristics of a Cold Front
Cold air advances in the direction of the triangles. Because cold air is more dense than warmer air, it is “Heavier” and so pushes underneath the warmer air.
As the warm air cools down, it forms clouds, which will likely be followed by precipitation. This is why cold fronts are characterized by deep storm clouds and heavy rain.
If the conditions are cold enough, this could result in other forms of precipitation such as snow.
Beast From the East
The weather system dubbed the “Beast From the East” that hit the UK in March 2018 was caused due to a significant cold front sweeping in from the East. Combined with storm Emma, this brought about a significant snowfall and low temperatures across large parts of the UK. This air will have traveled over the Siberian deserts.
Deserts are always hot, Right?
There is talk of another Easterly cold front reaching the UK towards the end of March 2018 also, which may well bring similar conditions.
Did you get out into the recent snow? Where did you go?