Oh, J.; Kim, I.-C.; Suh, K.-D., and Kim, S., 2019. Forecasting sudden high waves on the coasts of East/Japan Sea. In: Lee, J.L.; Yoon, J.-S.; Cho, W.C.; Muin, M., and Lee, J. (eds.), The 3rd International Water Safety Symposium. Journal of Coastal Research, Special Issue No. 91, pp. 96-100. Coconut Creek (Florida), ISSN 0749-0208.

During the recent decade, marine accidents and property damage due to high waves have frequently occurred on the coasts of East/Japan Sea, especially during the winter season. One of the major characteristics of the waves is its suddenness associated with rapid development of high waves from a calm state of sea. In 2016, Kim, Oh, and Suh named these waves ‘sudden high waves’ and proposed a criterion for sudden high waves by comparing the wave measurement data and the record of marine accidents and property damage on the east coast of the Korean Peninsula. Their intensity parameter of sudden high waves was proposed in terms of local wave height and wavelength. The criterion for sudden high waves is proposed as To enhance its generality, in this study, a similar analysis is made in terms of deepwater wave height and wavelength. It is also shown that the parameter can be forecasted if accurate wave forecast data is available. To show this, the spatio-temporal variation of the parameter is calculated using the wave hindcast data, and the wave measurement data and the record of damage are examined during the period when the parameter exceeds the criterion on the coasts.