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.