Speed of Tropical Storms and Typhoons After Recurvature in the Western North Pacific Ocean

Lawrence D. Burroughs Environmental Prediction Research Facility, Naval Postgraduate School, Monterey, Calif. 93940

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Samson Brand Environmental Prediction Research Facility, Naval Postgraduate School, Monterey, Calif. 93940

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Abstract

Twenty-five years of tropical cyclone data (1945–69) for the western North Pacific were evaluated to determine the, speed-of-movement characteristics of tropical storms and typhoons following recurvature. The results show that the acceleration of storms following recurvature is dependent on the meteorological characteristics of the storm, and the surrounding synoptic environment which is a function of the time of the year. Forecast equations derived by linear regression techniques are presented for the speed of movement of tropical cyclones 36 hr after recurvature.

Abstract

Twenty-five years of tropical cyclone data (1945–69) for the western North Pacific were evaluated to determine the, speed-of-movement characteristics of tropical storms and typhoons following recurvature. The results show that the acceleration of storms following recurvature is dependent on the meteorological characteristics of the storm, and the surrounding synoptic environment which is a function of the time of the year. Forecast equations derived by linear regression techniques are presented for the speed of movement of tropical cyclones 36 hr after recurvature.

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