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RISThe Possible Role of Density Current Dynamics in the Generation of Low-Level Vertical Vorticity in Supercells
Publisher: American Meteorological Society
Abstract: AbstractA physical mechanism based on density current dynamics is proposed to explain the generation of low-level vertical vorticity in supercells. This mechanism may serve as one explanation for the associative relationship ...
The Sensitivity of Convective Initiation to the Lapse Rate of the Active Cloud-Bearing Layer
Publisher: American Meteorological Society
Abstract: Numerical experiments are conducted using an idealized cloud-resolving model to explore the sensitivity of deep convective initiation (DCI) to the lapse rate of the active cloud-bearing layer [ACBL; the atmospheric layer ...
An Observational and Modeling Study of Mesoscale Air Masses with High Theta-E
Publisher: American Meteorological Society
Abstract: AbstractTypically, the cool side of an airmass boundary is stable to vertical motions due to its associated negative buoyancy. However, under certain conditions, the air on the cool side of the boundary can undergo a ...
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. ...
Observational Analysis of the 27 May 1997 Central Texas Tornadic Event. Part I: Prestorm Environment and Storm Maintenance/Propagation
Publisher: American Meteorological Society
Abstract: A detailed analysis of the 27 May 1997 central Texas tornadic storm complex is undertaken in an attempt to document the prestorm environment and identify the roles played by preexisting boundaries on storm maintenance/propagation ...
Rear-Flank Outflow Dynamics and Thermodynamics in the 10 June 2010 Last Chance, Colorado Supercell
Publisher: American Meteorological Society
Abstract: n 10 June 2010, the second Verification of the Origins of Tornadoes Experiment (VORTEX2) armada observed a supercell thunderstorm near Last Chance, Colorado. Tempest unmanned aircraft system (UAS) data collected in the ...
The Impact of Airmass Boundaries on the Propagation of Deep Convection: A Modeling-Based Study in a High-CAPE, Low-Shear Environment
Publisher: American Meteorological Society
Abstract: suite of experiments conducted using a cloud-resolving model is examined to assess the role that preexisting airmass boundaries can play in regulating storm propagation. The 27 May 1997 central Texas tornadic event is used ...
Empirical Examination of the Factors Regulating Thunderstorm Initiation
Publisher: American Meteorological Society
Abstract: nitiation is the part of the convective life cycle that is currently least understood and least well forecast. The inability to properly forecast the timing and/or location of deep convection initiation degrades forecast ...
Sounding Characteristics that Yield Significant Convective Inhibition Errors due to Ascent Rate and Sensor Response of In Situ Profiling Systems
Publisher: American Meteorological Society
Abstract: Accurate measurements of the convective inhibition (CIN) associated with capping inversions are critical to forecasts of deep convection initiation. The goal of this work is to determine the sounding characteristics most ...