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Arctic Warming May Trigger Polar Vortex Collapse in 2026

1/24/2026

Summary

Story summary

A significant sudden stratospheric warming event over the Arctic is forecast for early February 2026, potentially weakening the polar vortex.
This disturbance may allow Arctic air to intrude into North America and northern Europe, causing colder conditions.
Experts warn of a possible polar vortex collapse and prolonged cold across these regions.
The Met Office notes mixed February forecasts, and La Niña may amplify jet-stream contrasts later in the month.

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Story summary

A significant sudden stratospheric warming event over the Arctic is forecast for early February 2026, potentially weakening the polar vortex.
This disturbance may allow Arctic air to intrude into North America and northern Europe, causing colder conditions.
Experts warn of a possible polar vortex collapse and prolonged cold across these regions.
The Met Office notes mixed February forecasts, and La Niña may amplify jet-stream contrasts later in the month.