A model has been developed for the prediction of ocean wind waves.

Storm surges on the Pacific and Okhotsk Sea coasts of North Japan are studied. Extraordinary destructive surges hardly develop there because shallow waters along the coastal lines are very small. Generally speaking, severe storm surges are caused when developed cyclones pass near by the station, and the rise of sea surface balanced hydrostatically to atmospheric pressure fall is predominant.Exceptionally, on the Pacific coast from Hokkaido to Sanriku severe storm surges are caused when cyclones develop abnormally on the sea southeast off Hokkaido. These are due to combined effects of strong northeasterly or northerly winds behind the cyclone blowing nearly parallel to the coastal line and the atmospheric pressure fall. The theory of the generation of continental shelf wave proposed by ADAMS and BUCH-WALD (1969) which suggests that the wave may be formed by the longshore wind component can explain the facts qualitatively.Twe case studies are shown in this paper.

High sea levels with time scale more than one week appear

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