Met Office observation systems have picked up a ‘Sudden Stratospheric Warming’ over the past few days.
SSWs can herald cold weather ahead. They occur when the usual westerly winds in the stratosphere, between 10km and 50km up, are disrupted, break down and even reverse.
This can burrow down to the lower atmosphere over the course of a few days to a few weeks, reducing westerly winds that bring in mild air from the Atlantic at lower levels.
It gives easterly winds a chance to take hold and bring in cold air from the continent.
Of course, just ask the scientists at HAARP.