Cold air moving in from the east will bring an end to the above average temperatures we have enjoyed so far this winter, with the Metjeffuk is predicting a return of the beast from the east at the moment we are still waiting for this happen.
What is the "The Beast from the East"
February 2018, Great Britain and Ireland were affected by very cold air, named by Metjeffuk.com as the Beast from the East which brought widespread and unusually low temperatures with heavy snowfall to large areas. The cold spell was combined with Storm Emma,, which made landfall in southwest England and southern Ireland on 2 March.
This weather situation repeated itself on the weekend of 17 and 18 March, but was less severe than on the previous occasion due to the onset of spring. This briefer cold snap was given the name "Mini Beast from the East
WHAT IS POLAR STRATOSPHERIC WARMING?
A stratospheric sudden warming is perhaps one of the most radical changes of weather that is observed on our planet. Within the space of a week, North Pole temperatures can increase by more than 50 K (90°F). For example, on 17 January 2009 the temperature at the North Pole near 30 km was about 200 K. Over a 5-day period, the temperature increased to 260 K (a change of 60 K or 108°F).
These stratospheric sudden warming are caused by atmospheric waves that originate in the troposphere. The waves are forced by the large-scale mountain systems of the northern hemisphere and the land-sea contrasts between the continents and oceans. The waves are also characterized by their very large scales, typically referred to as planetary-scale waves. The stratospheric wind structure filters the smaller scale waves, only allowing the planetary waves to propagate into the stratosphere. As the waves move upward into the stratosphere they have two effects: first they will often push the polar vortex away from the North Pole—bringing warmer mid latitude air pole ward, and second, they produce a downward motion field that also warms the polar region.