GENERAL RADAR (WSR-88D) INTERPRETATION Anomalous Propagation Aspect Ratio Broadening of the Radar Beam Cell-based VIL vs Grid-basd VIL Composite Reflectivity Schematic Composite Reflectivity vs Base Reflectivity Echo Tops Stair-Step Artifact Layer Composite Reflectivity Schematic Layer Composite Reflectivity vs Base Reflectivity Layer Composite Reflectivity and Echoes Aloft Data Scales in Precipitation Accumulation Radar Horizon Radial Velocity Reflectivity (dBZ) vs Rain Rate Storm-Relative Velocity vs Base Velocity VIL and Air Mass Dependence Cone-of-Silence Effects on VIL Thunderstorms & Tornadoes Flooding Winter Weather Fire Weather Heat & Drought OK-FIRST Project, Oklahoma Climatological Survey, 100 East Boyd Street, Suite 1210, Norman, OK 73019. Copyright © 1996-2004 Oklahoma Climatological Survey. All Rights Reserved. Send comments or questions concerning OK-FIRST to okfirst@mesonet.org