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Neil L. Frank and Paul J. Hebert

Abstract

The 1973 hurricane season featured 95 “tropical systems” of which 24 acquired the closed circulation of a depression. Atlantic “seedlings” were responsible for the seven named storms in the Atlantic and seven of the twelve East Pacific storms. Fifty-six of the systems originated over Africa.

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Robert A. Baum

Abstract

The 1973 tropical cyclone season in the eastern North Pacific Ocean is discussed and compared with recent past seasons. A comparison between reconnaissance aircraft wind speed estimates and satellite derived storm intensity is presented. The storm track and a brief discussion of each storm are included.

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R. H. SIMPSON and PAUL J. HEBERT

Abstract

A general overview of the 1972 hurricane season in the North Atlantic is presented together with detailed accounts of all named tropical cyclones.

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NEIL L. FRANK

Abstract

The 1972 hurricane season produced 113 “seedlings” of which 24 acquired the closed circulation of a depression. This was the largest number of tropical systems observed since the National Hurricane Center began keeping records in 1968. The reason for this high number was the unusual development of many subtropical cyclones in temperate latitudes.

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ROBERT A. BAUM

Abstract

The 1972 tropical cyclone season in the eastern North Pacific Ocean is discussed and compared with past hurricane seasons. Pictures from the Advanced Technology Satellite series (ATS 1 and 3) show five storms or developing storms at, one time. Storm tracks and a brief discussion of each storm are included.

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R. H. SIMPSON and JOHN R. HOPE

Abstract

A general overview of the 1971 hurricane season in the North Atlantic is presented together with detailed accounts of all named tropical cyclones.

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NEIL L. FRANK

Abstract

The 1971 hurricane season featured 103 seedlings, 23 depressions, and 12 named storms. An anomalous circulation pattern developed over the Gulf of Mexico and the southwestern Atlantic Ocean in September and spawned a large number of depressions and storms within the subtropical belt near or north of latitude 25°N.

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WILLIAM J. DENNEY

Abstract

The 1971 season was characterized by recurrent and persistent patterns of activity. A record 12 hurricanes and six tropical storms were counted. Satellite pictures and ship reports provided most of the clues to developing storms. U.S. Air Force Weather Reconnaissance provided most of the location, intensity, and structure information after development was underway.

Several of the hurricanes and storms rate special attention: Agatha, a small violent May hurricane, hit the village of Playa Azul, Mexico; Bridget did $40 million damage at Acapulco, Mexico; Denise, Francene, Olivia, and Priscilla had reported surface winds of 100 kt or more; Monica was described by reconnaissance (which could not penetrate) as the strongest ever seen in the area; Katrina was an elusive ministorm that caused floods at Los Mochis, Mexico; Lily, a violent, recurving hurricane, took 12 lives in Mexico and caught several ships in her hurricane-force winds; and Olivia had an earlier existence as Caribbean hurricane Irene.

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R. H. SIMPSON and JOSEPH M. PELISSIER

Abstract

A general overview of the 1970 hurricane season in the North Atlantic is presented together with detailed accounts of all named tropical cyclones and certain subtropical or hybrid storms.

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NEIL L. FRANK

Abstract

The history of all tropical systems that formed over the Atlantic, Caribbean, and Gulf of Mexico during the 1970 hurricane season has been documented. There were a total of 87 systems from which 26 depressions and seven named storms evolved.

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