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RISA Technique for Detecting a Tropical Cyclone Center Using a Doppler Radar
Publisher: American Meteorological Society
Abstract: A ground-based Doppler radar technique is developed for detecting a tropical cyclone center position. Accurate determination of the cyclone center position, based on Doppler velocity measurements, will become essential for ...
Simulated Tornadic Vortex Signatures of Tornado-Like Vortices Having One- and Two-Celled Structures
Publisher: American Meteorological Society
Abstract: tornadic vortex signature (TVS) is a degraded Doppler velocity signature that occurs when the tangential velocity core region of a tornado is smaller than the effective beamwidth of a sampling Doppler radar. Early Doppler ...
Single Doppler Velocity Signature Interpretation of Nondivergent Environmental Winds
Publisher: American Meteorological Society
Abstract: A variety of single Doppler velocity patterns that simulate those observed in a nondivergent environment is presented. Measurements in optically clear air and/or widespread precipitation are simulated, using horizontally ...
Effects of Radar Proximity on Single-Doppler Velocity Signatures of Axisymmetric Rotation and Divergence
Publisher: American Meteorological Society
Abstract: Geometrical and mathematical relationships are developed to explain the variation with radar range of idealized single-Doppler velocity patterns of axisymmetric rotation and divergence regions. The velocity patterns become ...
A Hole in the Weather Warning System
Publisher: American Meteorological Society
Abstract: In this article, the problems deaf and hard of hearing people experience when attempting to accessthe weather warning systems in Oklahoma and Minnesota are documented. Deaf and hard of hearing people cannot hear CivilDefense ...
The Tornadic Vortex Signature: An Update
Publisher: American Meteorological Society
Abstract: tornadic vortex signature (TVS) is a degraded Doppler velocity signature of a tornado that occurs when the core region of a tornado is smaller than the half-power beamwidth of the sampling Doppler radar. Soon after the TVS ...
Detection of the Presence of Tornadoes at the Center of Mesocyclones Using Simulated Doppler Velocity Measurements
Publisher: American Meteorological Society
Abstract: imulations were conducted to investigate the detection of the Doppler velocity tornado signature (TS) and tornadic vortex signature (TVS) when a tornado is located at the center of the parent mesocyclone. Whether the ...
Oscillations in Mesocyclone Signatures with Range Owing to Azimuthal Radar Sampling
Publisher: American Meteorological Society
Abstract: When a thunderstorm mesocyclone changes range relative to a Doppler radar, the deduced core diameter and mean rotational velocity of the Doppler velocity mesocyclone signature oscillate back and forth, even though the radar ...
On the Interpretation of Single-Doppler Velocity Patterns within Severe Thunderstorms
Publisher: American Meteorological Society
Abstract: Although the flow field within a severe thunderstorm is complex, it is possible to simulate the basic features using simple analytical flow models (such as uniform flow, axisymmetric rotation, axisymmetric divergence). ...