On Tuesday January 12th, up to 15 centimetres of fresh snow is expected to fall on parts of the country, the federal meteorological service MeteoSwiss said.
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The service is issuing a Level 3 weather alert for the Western Jura, the Swiss-Romand Plateau, and the Vaud Prealps.
The hazard categories are numbered 1 to 5, with 5 being the most severe one.
Then, between Tuesday noon and Thursday evening, humid polar air, accompanied by strong winds, is expected to dump 80 to 110 centimetres of snow on the northern slope of the Alps and in Valais above 1,000 metres.
The heavy snowfall could “significantly increase” the risk of avalanches in all regions of Switzerland, according to Swiss Avalanche Bulletin.
The snow follows closely what MeteoSwiss qualified as the coldest weather of the current winter season so far — on January 9th, the temperature dropped to -30.7 degrees in Glattalp in canton Schwyz.