THE EASTERN PACIFIC HURRICANE SEASON OF 1968

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  • 1 Weather Bureau Forecast Office, ESSA, San Francisco, Calif.
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Abstract

A statistical resume of the season is presented and the lack of a valid climatology for comparison is pointed out. Background for the report is provided through discussion of limited basic data and description of the unique hurricane environment. Contributions of 1968 hurricanes to general knowledge of storms in the area include new ideas relating to inflow of cool air off cold water to the north and a demonstration that vertical shear has diagnostic value for revealing stoppage of the hurricane convective chimney. A few generalities as to the relationship between 1968 hurricane and storm behavior and middle latitude circulation are considered. A chronicle of individual storms and hurricanes gives particular attention to important data, mainly satellite pictures, and includes an example of a small intense hurricane with radius of tropical storm intensity winds of approximately 40 mi.

Abstract

A statistical resume of the season is presented and the lack of a valid climatology for comparison is pointed out. Background for the report is provided through discussion of limited basic data and description of the unique hurricane environment. Contributions of 1968 hurricanes to general knowledge of storms in the area include new ideas relating to inflow of cool air off cold water to the north and a demonstration that vertical shear has diagnostic value for revealing stoppage of the hurricane convective chimney. A few generalities as to the relationship between 1968 hurricane and storm behavior and middle latitude circulation are considered. A chronicle of individual storms and hurricanes gives particular attention to important data, mainly satellite pictures, and includes an example of a small intense hurricane with radius of tropical storm intensity winds of approximately 40 mi.

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