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Now showing items 51-60 of 66
Ensemble Kalman Filter Data Assimilation in the Presence of Large Model Error
(2010)
Though assimilation of synthetically generated surface flux "observations" into numerical forecast models has been attempted, the topic of observed flux data assimilation over land has received little attention. This may ...
Analysis of environmental modifications by deep convection during the Mesoscale Predictability Experiment
(2017-05)
The Mesoscale Predictability Experiment (MPEX) conducted during the spring of 2013 included frequent coordinated sampling of near-storm environments via upsondes. These unique observations were taken to better understand ...
Mobile, Phased-Array, Doppler Radar Observations of Tornadoes at X Band
(2012)
Previous studies of tornadoes have utilized high-spatial-resolution data obtained by mobile Doppler radars to better understand phenomena that occur on small spatial scales. There has not been a similar focus on using ...
Theory and observations of bores in the nocturnal environment of the Great Plains
(2017-08-03)
Accurate representation of bores in forecast models is a challenge. This challenge is
of considerable interest to both the operational and the research communities because
bores are capable of producing vertical displacements ...
APPLICATIONS OF ENSEMBLE KALMAN FILTER DATA ASSIMILATION: FROM CONVECTIVE THUNDERSTORMS TO HURRICANES
(2010)
For the numerical prediction of severe thunderstorm and hurricane, data assimilation is one of the necessary tools to obtain accurate initial conditions. Ensemble Kalman filter (EnKF) is a state of the art data assimilation ...
Mesocyclone and Microphysical Evolution in Simulated Supercell Storms with Varying Wind and Moisture Profiles
(2011)
As a high-impact convective mode, supercell thunderstorms have frequently been studied observationally and numerically. Two areas of study have focused on understanding mesocyclone evolution given a varying environmental ...
Polarimetric Measurements of Ice Pellets and Aggregated Snow
(2017-12-15)
The recent upgrade of the National Weather Service WSR-88D radar network to polarimetric capabilities provides the abundance of information about the precipitation microphysics. Even with the plethora of polarimetric ...
Assimilation of radar and surface observations of a developing convective system: Observing system simulation and real-data experiments
(2013-12)
Convective-scale observing system simulation experiments (OSSEs) and real-data experiments were performed to study the impact of radar and surface observations on analyses and forecasts of convective systems using the ...
Observations and Simulations of Polarimetric, X-Band Radar Signatures in Supercells
(2013)
Polarimetric weather radars, with the additional information collected, allow one to infer scatterer and precipitation properties considerably more easily than single-polarization radars. Given the relationship between the ...
Assimilation of CASA and WSR-88D Radar Data for Tornadic Convective Storms using an Ensemble Kalman Filter and Applications in Probabilistic Ensemble Forecasting
(2011)
Two sets of experiments are performed to examine the ability of a storm-scale numerical weather prediction (NWP) model to predict precipitation and meso-vortices within the tornadic mesoscale convective system (MCS) that ...