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Meteorologists are closely monitoring a weakening polar vortex, which could lead to a Sudden Stratospheric Warming (SSW)...
26/11/2025

Meteorologists are closely monitoring a weakening polar vortex, which could lead to a Sudden Stratospheric Warming (SSW) in the coming weeks. These events don’t always cause extreme weather — but historically they’ve been linked to cold spells, snowfall, and major shifts in the jet stream.

In our latest StormHour article, we explain:
• What an SSW actually is
• Why the polar vortex is weakening
• What the probabilities look like for Europe, the UK, and North America
• Past examples that show how powerful these events can be

A fascinating and important read for anyone who follows winter weather. ❄️🌍

A weakening polar vortex could trigger a Sudden Stratospheric Warming, increasing the risk of extreme winter weather. Learn what this means for the UK, Europe, and North America.

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