UK is preparing for a potential polar vortex impact that could bring freezing temperatures and travel disruptions later this month. Forecasters warn there is an 80% chance of sudden stratospheric warming (SSW), a phenomenon that can weaken the polar vortex and trigger severe cold spells. While the exact effects remain uncertain, past events—such as the 2018 ‘Beast from the East’—have brought heavy snowfall and widespread disruption. With a sharp temperature drop expected next week, the UK could see wintry showers, frost, and possible snow, particularly in northern and higher-altitude regions, raising concerns over travel conditions.

The UK is highly likely to experience a polar vortex collapse in March, a weather phenomenon responsible for the 2018 ‘Beast from the East’. A sudden stratospheric warming (SSW) event, with an 80% probability, could bring significant weather changes toward the end of the month.

A polar vortex collapse occurs when high-altitude westerly winds weaken, disrupting the polar night jet over the Arctic. This disturbance causes cold air to descend rapidly, leading to a sudden temperature rise in the stratosphere. The impact on ground-level weather varies, but such events can trigger extended periods of cold, dry conditions over northern Europe and the UK. However, not all SSW events lead to severe weather.

Sharp Drop in Temperatures Expected

The recent mild weather will come to an end as cold air moves southward next week. A drop in temperatures will bring wintry showers, particularly in northern and northeastern areas.

• Daytime temperatures will range between 5-8°C, while overnight lows in rural Scotland could plummet to -4°C.
• Snowfall is expected mainly in hilly regions, though some lower areas may see wintry showers.
• Frosty conditions will return to many parts of the country.

The UK is preparing for a potential polar vortex impact, with an 80% chance of sudden stratospheric warming (SSW) that could bring freezing temperatures and travel disruptions later this month. While the full effects remain uncertain, past events like the 2018 ‘Beast from the East’ have led to severe cold and widespread disruption.

How the SSW May Affect the UK

The weakening of the polar night jet allows cold air to push southward, often leading to blocking high-pressure systems over the North Atlantic and Scandinavia. These systems typically result in prolonged cold spells across the UK. However, the extent of this event’s impact will become clearer in the coming weeks.

A cold front will arrive by early next week, bringing northeasterly winds and lower temperatures. While snowfall is most likely in higher elevations, many areas will experience overnight frosts and chilly conditions as March progresses.

As weather patterns evolve, forecasts will provide more precise predictions on the potential effects of the polar vortex collapse in the UK.

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