Despite its power, radar faces "beam blockage" from mountains and the "earth curvature" problem, where the beam travels too high to see low-level weather far from the station. Summary of Key Metrics ⚡ Key Data Points: : Intensity of precipitation. : Motion toward or away from the radar. SWcap S cap W : Spectrum width (turbulence). ZDRcap Z cap D cap R : Differential reflectivity (particle shape).