Gudrun was a powerful storm which hit Denmark and Sweden on 8 January 2005, and Latvia and Estonia on 9 January 2005. The name Erwin was chosen by the Free University of Berlin, while the storm was named Gudrun by the Norwegian Meteorological Institute and was the name used in Sweden. Sustained wind speeds of 126 km/h (78 mph) with wind gusts of 165 km/h (103 mph) were measured in Hanstholm, Denmark – the same strength as a Category 1 hurricane.