Accession Number : ADA319878

Title :   Doppler Radar Investigation of Tornadic and Lightning Producing Storms in Northeast Colorado.

Descriptive Note : Master's thesis,

Corporate Author : AIR FORCE INST OF TECH WRIGHT-PATTERSON AFB OH

Personal Author(s) : Lucci, Richard M.

PDF Url : ADA319878

Report Date : JAN 1997

Pagination or Media Count : 160

Abstract : Kinematic, microphysical, and electrical characteristics of two multicell thunderstorms observed in northeast Colorado were investigated using single and dual Doppler radar and cloud-to-ground (CG) lightning data. These particular thunderstorms were chosen because of their generation of weak short-lived tornadoes and CG lightning dominated by positive flashes. Storm data was collected using the multiparameter, CSU-CHILL, and the National Center for Atmospheric Research (NCAR) Mile High Doppler radars. Various radar analysis methods were employed in an effort to infer origins of rotation, tornado formation mechanisms, and the storm structure responsible for the observed lightning patterns. Single Doppler techniques included multiparameter measurements, calculations of azimuthal shear, histogram analyses, a study of constant altitude and vertical cross-section data, and an examination of the unedited reflectivity and radial velocity fields. Dual-Doppler data was used to synthesize the three dimensional wind field.

Descriptors :   *DOPPLER RADAR, *METEOROLOGICAL DATA, *WEATHER FORECASTING, *LIGHTNING, *TORNADOES, SHEAR PROPERTIES, COMPUTATIONS, CELLS, WIND, ELECTRICAL PROPERTIES, METEOROLOGICAL RADAR, SHORT RANGE(TIME), THREE DIMENSIONAL, VERTICAL ORIENTATION, CROSS SECTIONS, STORMS, REFLECTIVITY, ALTITUDE, AZIMUTH, LOW STRENGTH, HISTOGRAMS, ATMOSPHERES, COLORADO, THUNDERSTORMS, FLASHES, RADIAL VELOCITY.

Subject Categories : Meteorology
      Active & Passive Radar Detection & Equipment

Distribution Statement : APPROVED FOR PUBLIC RELEASE