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RISThe Numerical Simulation of Non-Supercell Tornadogenesis. Part I: Initiation and Evolution of Pretornadic Misocyclone Circulations along a Dry Outflow Boundary
Publisher: American Meteorological Society
Abstract: High-resolution three-dimensional simulations are used to study misocyclone initiation and development along the leading edge of an outflow boundary. Model conditions were designed such that this development could be ...
The Numerical Simulation of Nonsupercell Tornadogenesis. Part III: Parameter Tests Investigating the Role of CAPE, Vortex Sheet Strength, and Boundary Layer Vertical Shear
Publisher: American Meteorological Society
Abstract: Nonsupercell tornadogenesis has been investigated in a three-part numerical study. Building on the results of Parts I and II, Part III addresses the sensitivity of nonsupercell tornadogenesis to variations in convective ...
The Numerical Simulation of Nonsupercell Tornadogenesis. Part II: Evolution of a Family of Tornadoes along a Weak Outflow Boundary
Publisher: American Meteorological Society
Abstract: Nonsupercell tornadogenesis along a weak outflow boundary has been simulated using a three-dimensional moist convective cloud model. Thermodynamic conditions similar to those observed for nonsupercell tornado (NST) events ...
A Numerical Case Study of Convection Initiation along Colliding Convergence Boundaries in Northeast Colorado
Publisher: American Meteorological Society
Abstract: A numerical cloud model has been used to simulate convective storm development on 17 July 1987 in northeast Colorado. The study involves the simulation of convergence along atmospheric boundaries and the subsequent development ...
Evolution of a Long-Track Violent Tornado within a Simulated Supercell
Publisher: American Meteorological Society
Abstract: ornadoes are among nature?s most destructive forces. The most violent, long-lived tornadoes form within supercell thunderstorms. Tornadoes ranked EF4 and EF5 on the Enhanced Fujita scale that exhibit long paths are the ...
The 19 April 1996 Illinois Tornado Outbreak. Part II: Cell Mergers and Associated Tornado Incidence
Publisher: American Meteorological Society
Abstract: In the 19 April 1996 Illinois tornado outbreak, cell mergers played a very important role in the convective evolution. With a large number of cells forming within a short time period, the early stages of cell organization ...
The 19 April 1996 Illinois Tornado Outbreak. Part I: Cell Evolution and Supercell Isolation
Publisher: American Meteorological Society
Abstract: In this study of the 19 April 1996 Illinois tornado outbreak, 109 cells were tracked using radar data to understand the transition of the cell configuration from a considerable number of initial cells to a small subset of ...
Thermodynamic Analysis of Supercell Rear-Flank Downdrafts from Project ANSWERS
Publisher: American Meteorological Society
Abstract: Data collected during Project Analysis of the Near-Surface Wind and Environment along the Rear-flank of Supercells (ANSWERS) provided an opportunity to test recently published associations between rear-flank downdraft (RFD) ...
Surface Analysis near and within the Tipton, Kansas, Tornado on 29 May 2008
Publisher: American Meteorological Society
Abstract: Data collected by a mesonet within the near-tornado environment and in the Tipton tornado on 29 May 2008 provided a rare opportunity to analyze rear-flank downdraft (RFD) outflow properties closely bounding a tornado and ...
The Bowdle, South Dakota, Cyclic Tornadic Supercell of 22 May 2010: Surface Analysis of Rear-Flank Downdraft Evolution and Multiple Internal Surges
Publisher: American Meteorological Society
Abstract: obile mesonet sampling in the hook echo/rear-flank downdraft (RFD) region of a tornadic supercell near Bowdle, South Dakota, provided the opportunity to examine RFD thermodynamic and kinematic attributes and evolution. ...