THE HURRICANE-TORNADO

JOHN S. SMITH Weather Bureau Forecast Center, Chicago, Ill.

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Abstract

Climatological data in recent years have become sufficient for the further study of tornadoes which occur in hurricane systems. Several characteristics of the hurricane tornado are determined from data for an 8-yr. period by plotting the center positions of each hurricane and its associated tornadoes. The data show: (1) a comparison between hurricane and non-hurricane tornadoes; (2) a “Significant Sector” for tornado-genesis; (3) a “Preferred Quadrant” of the hurricane for tornado-genesis; (4) the most favorable time of day for tornado occurrence; (5) tornado frequencies with respect to various speeds and distances of the hurricane on and off shore; (6) a tenative hurricane model.

Abstract

Climatological data in recent years have become sufficient for the further study of tornadoes which occur in hurricane systems. Several characteristics of the hurricane tornado are determined from data for an 8-yr. period by plotting the center positions of each hurricane and its associated tornadoes. The data show: (1) a comparison between hurricane and non-hurricane tornadoes; (2) a “Significant Sector” for tornado-genesis; (3) a “Preferred Quadrant” of the hurricane for tornado-genesis; (4) the most favorable time of day for tornado occurrence; (5) tornado frequencies with respect to various speeds and distances of the hurricane on and off shore; (6) a tenative hurricane model.

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