Accession Number : AD0696685

Title :   THE RATE OF GROWTH OF TALL THUNDERSTORMS.

Descriptive Note : Final rept. Sep 67-Aug 69,

Corporate Author : ATMOSPHERIC RESEARCH AND DEVELOPMENT CORP ST LOUIS MO

Personal Author(s) : Hanks,Howard H. , Jr. ; Long,Michael J.

Report Date : SEP 1969

Pagination or Media Count : 44

Abstract : Growth rates of thunderstorms which reach at least 50,000 feet have been summarized for 15 April 1962 - 15 September 1968 for nine cities in the United States. Hourly increment were most used. A shorter time increment of 15-20 minutes was used to determine growth rates at St. Louis, Mo., using a 5.5 cm aircraft-type radar. The relationship between shear and growth rates was also tested. A computer program for estimating tropopause penetrations by large thunderstorms was modified. Results indicate that growth rates obtained are a function of the time increment used. Most tall thunderstorms appeared to change their growth rates significantly during second hour. Shear and stability were not significantly related to thunderstorm growths. The modification of the computer program appears to improve the estimate of the thunderstorm tops. (Author)

Descriptors :   (*THUNDERSTORMS, SYNTHESIS), URBAN AREAS, DIURNAL VARIATIONS, METEOROLOGICAL RADAR, TROPOPAUSE, PENETRATION, COMPUTER PROGRAMS

Subject Categories : Meteorology

Distribution Statement : APPROVED FOR PUBLIC RELEASE