A polar vortex collapse. Now, meteorologists are calling for another collapse in the middle of March, one that could plunge the U.S., Canada, and parts of Europe into a bitterly cold spell just days before the official arrival of spring.

What is the polar vortex? The polar vortex is a large area of low pressure, cold air around the Earth's poles that blows westward during the winter

A polar vortex collapse is expected to bring severe winter weather to Canada and the US mid-month. This event could also affect the UK and Europe, disrupting weather patterns as cold Arctic air spills southward,

Forecasters are now 'confident' of a sudden change in the weather developing this month - meaning a return to snow, ice and frosty temperatures for the UK and Europe

At present, it seems that the only places at risk of freezing temperatures, icy rain, or snow, are in north and eastern Scotland. This means places like the Scottish Highlands, and Aberdeenshire are at the most risk. The rest of the UK can relax – you will likely just need a hat and a warm jumper.

Heavy snow is expected in a -5C Arctic blast later this month due to a rare polar vortex and weather maps show the areas of the UK worst affected from the flurries

Cobb and north Georgia are under a freeze warning from 9 p.m. Wednesday through 10 a.m. Thursday, according to the National Weather Service in Peachtree City. After some overnight rain, blustery weather conditions are persisting,

The Met Office has warned eBritain could face a bitter blast later this month, with forecasts indicating the potential for a sudden stratospheric warming event within the coming weeks. This development could dash any remaining hopes for a mild end to the winter season.