Search
Now showing items 31-40 of 43
Surface thermodynamic characteristics of hook echoes and rear-flank downdrafts, with implications for tornado genesis and maintenance.
(2000)
Since its first documentation in 1953, the "hook echo" has been perhaps the best-recognized radar feature of supercell storms. Hook echoes have been associated with a region of subsiding air to the rear of both tornadic ...
Discrimination of Tornadic and Non-Tornadic Severe Weather Outbreaks
(2008)
Outbreaks of severe weather affect the majority of the conterminous United States. An outbreak is characterized by multiple severe weather occurrences within a single synoptic system. Outbreaks can be categorized by ...
Role of upper-level wind shear on the structure and maintenance of derecho-producing convective systems.
(2004)
To explore the role of upper-level shear in derecho environments, a set of two-dimensional simulations of density currents within a dry, neutrally stable environment are used to examine the ability of a cold pool to lift ...
3DVAR and cloud analysis with WSR-88D Level-II data for the prediction of tornadic thunderstorms.
(2005)
Doppler weather radar observations play a key role in initializing convective storms within storm-scale numerical weather prediction (NWP) models. The radial velocity and reflectivity are the two main parameters measured ...
Numerical simulations of cyclic storm behavior: Mesocyclogenesis and tornadogenesis.
(2003)
Building upon previous work that examined the dynamics and model sensitivity of cyclic mesocyclogenesis, this study uses idealized numerical simulations to investigate the cyclic redevelopment of vertical vortices in ...
Monsoon variability over the Horn of Africa.
(2006)
Over the past several decades, the Horn of Africa has been ravaged by catastrophic droughts and famines. In spite of the devastating frequent droughts and occasional floods in the region, our understanding of the region's ...
Characteristics of tropical cyclones in the North Atlantic and East Pacific.
(2007)
In this dissertation, I present a series of investigations to expand our understanding of TCs in the East Pacific and North Atlantic basins. First, I developed and applied a climatological tool that quickly and succinctly ...
The relationship between weather variables and electricity demand to improve short-term load forecasting.
(2003)
The power utility industry has become highly volatile with a deregulated market on the horizon and with enormous profit and loss swings in the energy trading market. Electricity, in particular, has become a commodity that ...
Prediction of cloud-to-ground lightning in the western United States.
(2002)
This dissertation focuses specifically on identifying the thermodynamic environment and forcing mechanisms across the western United States that create precipitation systems with lightning. The majority of these convective ...
Dynamic adjustment in an idealized numerically-simulated bow echo.
(2002)
While the large-scale atmosphere is governed by relatively simple dynamic balance relations that describe the mutual adjustment between the mass and wind fields (e.g., hydrostatic and geostrophic balances), no simple ...