Abundant rain, mud streams and avalanches: what is the ‘genuane epitession’ that the Alps are braced for?

The Alps are bracing for heavy stormy weather in the region. From today there will be a lot of rain. And also in the coming days a flood of precipitation, produced by a ‘genuane epitession’ that the storm name Hans got. But what is that weather phenomenon? How does something like that arise and how often? And is there even more bad weather coming? Climatologist Lander van Tricht explains.

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