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RISOn the Thermodynamic Equation for Deep Convection
Publisher: American Meteorological Society
Abstract: A review is given of six equations that are used to approximate reversible saturated parcel ascent. These approximations are compared with the aid of several examples and their appropriateness for use in modeling deep ...
Hodograph Curvature and Updraft Intensity in Numerically Modeled Supercells
Publisher: American Meteorological Society
Abstract: A set of numerical simulations of supercell thunderstorms has been carried out with a range of low-level curvatures in the environmental hodograph and midlevel shears. They cover a range of hodograph ?shape,? as measured ...
Simulation and Analysis of Tornado Development and Decay within a Three-Dimensional Supercell Thunderstorm
Publisher: American Meteorological Society
Abstract: A three-dimensional numerical simulation using a two-way interactive nested grid is to study tornado-genesis within a supercell. During a 40-minute period, two tornadoes grow and decay within the storm's mesocyclone. The ...
The 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 ...
A Three-Dimensional Numerical Simulation of Splitting Severe Storms on 3 April 1964
Publisher: American Meteorological Society
Abstract: A three-dimensional numerical storm model is used to investigate the observed splitting of several reflectivity echoes on 3 April 1964 in Oklahoma. Representative soundings from this day exhibit a nearly one-directional ...
A Simulation of the Development of Successive Cells Along a Cold Outflow Boundary
Publisher: American Meteorological Society
Abstract: A three-dimensional numerical simulation is presented in which five new cells (clouds) develop in succession over a 4 h period. The cells that develop have common characteristics including a lifetime of ?40 min. They form ...
The Dependence of Storm Longevity on the Pattern of Deep Convection Initiation in a Low-Shear Environment
Publisher: American Meteorological Society
Abstract: he sensitivity of storm longevity to the pattern of deep convection initiation (e.g., multiple, quasi-linearly arranged initial deep convective cells versus an isolated deep convective cell) is examined using idealized ...
Observational Analysis of the 27 May 1997 Central Texas Tornadic Event. Part II: Tornadoes
Publisher: American Meteorological Society
Abstract: The 27 May 1997 central Texas tornadic event has been investigated in a two-part observational study. As demonstrated in Part I, the 1D environment associated with this event was unfavorable for significant (≥F2) tornadoes. ...
Finescale Spiral Band Features within a Numerical Simulation of Hurricane Opal (1995)
Publisher: American Meteorological Society
Abstract: One of the most recognizable features associated with a well-organized tropical system are spiral rainbands. These quasi-stationary rainbands often extend hundreds of kilometers from the storm center and have been well ...