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Resolution and Physics Sensitivities in Convection-Allowing Models and Ensembles
(2017-08)
In recent years, convection-allowing models (CAMs) and ensembles have become more prominent in both research and operational settings. However, it largely remains unclear how to leverage computing resources to maximize ...
African Easterly Wave Tracks as Simulated by CMIP5 Models
(2017-08)
African Easterly Waves (AEWs) impact Sahel rainfall and serve as trigger disturbances for tropical cyclones (TCs) in the North Atlantic Ocean. So far, there has been very little investigation into future changes in intensity ...
Convection Initiation By Heterogeneous Great Plains Low-Level Jets
(2017)
Nocturnal convection is a common feature of the Great Plains region. Forecasting this convection, however, is challenging, as the processes leading up to convection initiation (CI) can be subtle. It has been discussed in ...
The Response of a Long-lived Mesoscale Convective System to Changes in Lower-Tropospheric Conditions
(2017-05)
Most continental regions experience an afternoon or evening maximum of convective activity, which is dominated by convection driven by surface heating. However, the Great Plains of North America experiences a nocturnal ...
An Evaluation of Radar- and Satellite-Data Based Products to Discriminate Between Tornadic and Non-Tornadic Storms
(2017-12)
Severe weather, and specifically tornadoes, can pose a significant threat to property and human life. Tornadic storms have been extensively studied using radar observations for decades, and some more recent studies have ...
Characteristics of the 2011-2016 California Drought
(2017-05-13)
The recent California drought persisted for five years from 2011-2016 and was the worst drought in recent memory. Previous studies have established that this drought was marked by low but not unprecedented rainfall coupled ...
Inferring Bulk Microphysical Characteristics of Mesoscale Convective Systems Using Polarimetric Radar Observations
(2017)
In 2013, the network of NEXRAD WSR-88D’s were upgraded to dual-polarization. Dual-polarization allows for the identification of particle shape, size, orientation, and concentration within a radar sample volume due to the ...
SIMULTANEOUS ASSIMILATION OF RADAR AND SATELLITE DATA FOR CONVECTIVE SCALE NWP USING HYBRID ENSEMBLE VARIATIONAL DATA ASSIMILATION APPROACH
(2017)
Recently, an ensemble of the three-dimensional variational data assimilation (En3DA) system has been developed based on Advanced Regional Prediction System (ARPS) three-dimensional variational (3DVar) data assimilation ...
Assessing the Impact of Non-Conventional Observations on High-Resolution Analyses and Forecasts
(2017-05)
A key recommendation of a 2009 report by the National Research Council (NRC) was for new mesoscale networks to be integrated with existing ones to form a nationwide “network of networks”. This recommendation originated ...
Evolution of Specific Differential Phase in Squall Lines and Corresponding Lightning Channels
(2017-08-01)
Dual-polarimetric radar products have been used in observing changes and persistence of thunderstorm electric fields in relation to lightning discharges. One such product, specific differential phase (KDP), is valuable ...