Natural Hazards and Earth System Science www.nat-hazards-earth-syst-sci.net 1561-8633 1684-9981 8 1 2008 10.5194/nhess-8-37-2008 http://www.nat-hazards-earth-syst-sci.net/8/37/2008/ http://www.nat-hazards-earth-syst-sci.net/8/37/2008/nhess-8-37-2008.html http://www.nat-hazards-earth-syst-sci.net/8/37/2008/nhess-8-37-2008.pdf 37 46 2008-01-21 Wave conditions in the Baltic Proper and in the Gulf of Finland during windstorm Gudrun T. Soomere soomere@cs.ioc.ee A. Behrens L. Tuomi J. W. Nielsen Centre for Nonlinear Studies, Institute of Cybernetics at Tallinn University of Technology, Tallinn, Estonia Institute for Coastal Research, GKSS Forschungszentrum, Geesthacht, Germany Finnish Institute of Marine Research, Helsinki, Finland Danish Meteorological Institute, Copenhagen, Denmark Wave conditions in the northern Baltic Proper during windstorm Erwin/Gudrun (January 2005) are analysed based on in situ measurements in three locations and output of operational wave models from the German Weather Forecast Service, the Danish Meteorological Institute and the Finnish Institute of Marine Research. The measured significant wave height reached 7.2 m in the northern Baltic Proper and 4.5 m in the Gulf of Finland. The roughest wave conditions, estimated from the comparison of the forecast and measured data, occurred remote from the sensors, off the coasts of Saaremaa and Latvia where the significant wave height was about 9.5 m. 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