Accession Number : AD0721580

Title :   A Diagnostic Study of Great Plains Tornado Conditions.

Descriptive Note : Master's thesis,

Corporate Author : NAVAL POSTGRADUATE SCHOOL MONTEREY CALIF

Personal Author(s) : Thresher,Alfred Addison , II

Report Date : MAR 1971

Pagination or Media Count : 65

Abstract : A study is made of a severe storm system that traversed the mesoscale network in Oklahoma on 10 June 1967. Synoptic data, and mesoscale data covering the period from 2300 GMT to 0600 GMT, are used to investigate synoptic atmospheric conditions indicative of severe storms, and the dynamic and thermodynamic properties of the air in proximity to a tornado. In this case study, presence of low level moisture and elimination of the inversion are shown to be necessary but not sufficient conditions for the release of latent instability; a lifting mechanism is required. It is shown that having the largest negative Showalter Index in an area does not in itself guarantee a severe storm or tornado. The observed release of latent instability was associated with the passage of a squall line and the presence of an upper level short wave. (Author)

Descriptors :   (*TORNADOES, OKLAHOMA), NETWORKS, THERMODYNAMICS, ATMOSPHERIC MOTION, INTENSITY, STABILITY, NEW MEXICO, TEXAS, THESES

Subject Categories : Meteorology

Distribution Statement : APPROVED FOR PUBLIC RELEASE