Accession Number : AD0623663

Title :   RESEARCH ON CHARACTERISTICS AND EFFECTS OF SEVERE STORMS.

Descriptive Note : Annual summary rept. no. 1,

Corporate Author : IMPERIAL COLL OF SCIENCE AND TECHNOLOGY LONDON (UNITED KINGDOM) DEPT OF METEO ROLOGY

Personal Author(s) : Carlson, T. N. ; Ludlam, F. H. ; Green, J. S. A. ; McIlveen, J. F. R.

Report Date : AUG 1965

Pagination or Media Count : 170

Abstract : In the first part of this report an examination is made of the large-scale conditions under which severe local storms develop. Detailed case-studies have been made in respect of six situations, five of which are described here. In two of these, over Western Europe, severe hailstorms occurred, one with tornadoes, and in another storms failed to develop. In the other two situations, tornadic hailstorms developed over and near the state of Oklahoma. It is concluded that the occurrence of the most intense storms depends upon a favourable combination of geographical and large-scale atmospheric flow features. In the several case studies the technique of analysis used isentropic charts showing the flow relative to a large-scale motion system, assumed to be in a steady state. In the second part of the report this technique is discussed and shown to have some advantages over conventional methods, sufficient to justify its further examination. (Author)

Descriptors :   *STORMS, *AIR MASS ANALYSIS, ATMOSPHERIC MOTION, METEOROLOGICAL PHENOMENA, HAIL, TORNADOES, THUNDERSTORMS, WEATHER FORECASTING.

Subject Categories : Aerodynamics

Distribution Statement : APPROVED FOR PUBLIC RELEASE