Abstract: Inbound and outbound passes were made with an instrumented aircraft at a variety of altitudes in the inflow region of a severe thunderstorm containing a mesoscale vortex. The streamwise vorticity, helicity, and geostrophic ...

Abstract: Although negative ground flashes usually dominate cloud-to-ground lightning activity, positive ground flashes can dominate in some severe storms for periods ranging from 30 min to several hours. Unlike most other types of ...

Abstract: A continuing problem in dealing with climatology data concerning tornadoes in the United States is the validity of the quantitative information contained in the various available data bases. Two aspects of tornado data are ...

Abstract: Presented in this Paper are Doppler spectra of a very large tornado that occurred on 22 May 1981 near Binger, Oklahoma. Tracking of the tornado was accomplished with the help of a novel ?polar spectra display.? Bimodal ...

Abstract: In order to support NEXRAD program requirements, WSR-88D systems have the capability to record data and products at four levels. Of these, level II (base data) and level III (products) will be most commonly available for ...

Abstract: Examination of 320 mesocyclones recorded by the National Severe Storms Laboratory's Doppler radars over Oklahoma and adjacent portions of Texas during 20 spring tornado seasons of 1971?90 shows that tornado-producing ...

Abstract: On 8 May 2003, a tornadic supercell tracked through portions of the Oklahoma City, Oklahoma, metropolitan area and produced violent damage along portions of its path. This storm passed through the dense in situ radar network ...

Abstract: Single-Doppler Velocity data reveal that a dominant feature in the Union City, Okla., tornadic thunderstorm is a core mesocyclonic circulation, 2?6 km in diameter, extending to at least 9 km above ground. There is an ...

Abstract: Doppler radar measurements in the Union City, Okla., tornadic storm of 24 May 1973 led to discovery of a unique tornadic vortex signature (TVS) in the field of mean Doppler velocity data. The distinct character of this ...

Abstract: Significant advances in single-Doppler radar application to severe storm study and identification have been made since 1965. Mesocyclones have been detected by Doppler radar and found to precede severe weather occurrence ...