Search
CSV
RISApplying a Neighborhood Fractions Sampling Approach as a Diagnostic Tool
Publisher: American Meteorological Society
Abstract: he fractions skill score (FSS) belongs to a class of spatial neighborhood techniques that measures forecast skill from samples of gridded forecasts and observations at increasing spatial scales. Each sample contains the ...
A High Plains Squall Line Associated with Severe Surface Winds
Publisher: American Meteorological Society
Abstract: The characteristics of a severe squall line are examined using data acquired from the 1981 Cooperative Convective Precipitation Experiment (CCOPE). The case is unusual in that the squall line was decoupled from an immediate, ...
Interactions between Upper and Lower Tropospheric Gravity Waves on Squall Line Structure and Maintenance
Publisher: American Meteorological Society
Abstract: Using a simplified thermodynamic sounding, and variable vertical wind shear, we investigate the role of gravity waves on the structure and propagation of a simulated two-dimensional squall line. Based on an observed squall ...
Verification of Cloud Forecasts over the Eastern Pacific Using Passive Satellite Retrievals
Publisher: American Meteorological Society
Abstract: Operational cloud forecasts generated by the Coupled Ocean?Atmosphere Mesoscale Prediction System (COAMPS)1 were verified over the eastern Pacific Ocean. The study focused on the accuracy of cloud forecasts associated with ...
Assessment of Hydrometeor Collection Rates from Exact and Approximate Equations. Part II: Numerical Bounding
Publisher: American Meteorological Society
Abstract: Past microphysical investigations, including Part I of this study, have noted that the collection equation, when applied to the interaction between different hydrometeor species, can predict large mass transfer rates, even ...
Evaluation of Heavy Precipitation Forecasts Using Composite-Based Methods: A Distributions-Oriented Approach
Publisher: American Meteorological Society
Abstract: Numerical forecasts of heavy warm-season precipitation events are verified using simple composite collection techniques. Various sampling methods and statistical measures are employed to evaluate the general characteristics ...
Assessment of Hydrometeor Collection Rates from Exact and Approximate Equations. Part I: A New Approximate Scheme
Publisher: American Meteorological Society
Abstract: The collection equation is analyzed for the case of two spherical hydrometeors with collection efficiency unity and exponential size distributions. When the fall velocities are significantly different a more general form ...
Evidence for a Nimbostratus Uncinus in a Convectively Generated Mixed-Phase Stratiform Cloud Shield
Publisher: American Meteorological Society
Abstract: AbstractThe structure of a melting layer associated with a mesoconvective system is examined using a combination of in situ aircraft measurements and a unique Doppler radar operated by the U.S. Navy that has a range ...
Convective Cells in Altocumulus Observed with a High-Resolution Radar
Publisher: American Meteorological Society
Abstract: ery-high-resolution Doppler radar observations are used together with aircraft measurements to document the dynamic and thermodynamic structure of a dissipating altocumulus cloud system associated with a deep virga layer. ...
The Unexpected Rapid Intensification of Tropical Cyclones in Moderate Vertical Wind Shear. Part III: Outflow–Environment Interaction
Publisher: American Meteorological Society
Abstract: AbstractInteractions between the upper-level outflow of a sheared, rapidly intensifying tropical cyclone (TC) and the background environmental flow in an idealized model are presented. The most important finding is that ...