Met Office Polar Vortex Forecast
In short
The Met Office has issued a new forecast warning that UK temperatures are set to plunge this week due to changes in the polar vortex. This shift follows a period of mild autumn weather and could bring snow to parts of northern Britain.
In plain words
A polar vortex is a large area of cold air spinning high above the North Pole. When this vortex becomes unstable or weakens, freezing Arctic air can spill down towards the UK, causing sudden cold snaps.
A simple example
After experiencing temperatures over 21C in Devon earlier this week, the UK may soon see snow depths of up to 5cm in northern areas.
Why it matters
Understanding these shifts helps people prepare for sudden drops in temperature and potential storms. It is especially important this winter as El Niño may interact with the vortex to increase the risk of freezing weather.
Easy to mix up
Do not confuse the polar vortex with a standard low-pressure system or a regular cold front.
Sources
- Met Office issues new polar vortex forecast as UK temperatures set to plunge this week
- Met Office issues new October weather forecast - temperatures to plunge this week
- UK winter 2026-2027: El Niño and polar vortex interaction raise risk of snow
- Met Office issues verdict on polar vortex and 'super El Niño' claims