Abstract: Dual-Doppler (S-band) radar observations are used to describe both the three-dimensional flow and a fife cycle of a severe thunderstorm on 6 June 1974. The primary updraft region was near a small mesocyclonic circulation ...

Abstract: A methodology for obtaining pressure perturbations and buoyancy in thunderstorms observed with Doppler radar is described and applied to two tornadic thunderstorms. Extracted thermodynamic information is combined with ...

Abstract: Doppler radar observations concerning the generation of vertical vorticity in tornadic thunderstorms are documented for two case studies and the role of downdrafts in intensifying vertical vorticity is examined. The ...

Abstract: Updraft mesocyclones in tornado-producing thunderstorms form along convergent and cyclonically sheared boundaries that separate inflow air entering forward and rear storm quadrants. Maximum tangential flow resides in girding ...

Abstract: Interrelationships among severe thunderstorm wind flow, tornado parent circulation and tornado are examined with dense single- and dual-Doppler radar observations from the Del City-Edmond, Oklahoma, storm of 20 May 1977. ...

Abstract: Observations collected during the Oklahoma?Kansas PRE-STORM experiment are used to document the evolution and structure of the mesoscale convective system (MCS) that occurred on 6?7 May 1985. The storm began when a short ...

Abstract: Doppler radar observations are utilized to describe the evolution of the severe thunderstorm updraft mesocyclone and its associated gust front. Tornadoes form within the elliptical mesocyclonic circulation, apparently along ...

Abstract: Estimates of precipitation are improved when raingage observations are used to calibrate quantitative radar data as well as to estimate precipitation in areas without radar data. Estimated areal precipitation depth errors ...

Abstract: A simple empirical procedure for determining freezing levels with polarimetric radar measurements is described. The algorithm takes advantage of the strong melting-layer signatures and the redundancy provided by the suite ...

Abstract: Recently, two physically based algorithms, the ?beta? (?) method and the ?constrained-gamma? method, have been proposed for retrieving the governing parameters of the gamma drop size distribution (DSD) from polarimetric ...