Föhnstorm at Urnersee in the Swissalps. the “föhnwind” needs 4hPa pressure difference between the south and north of the swissalps, to breakthrough in the alpine valleys. on the 11.Dez.2017 we had over 18 hPa difference. the southerly föhnwind was blowing with extrem galegusts over 120km/h.
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on Friday, December 15th, 2017 at 8:03 pm and is filed under Board Sports, Video - general, Windsurf & Sailboard.
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