Most rain never reaches the ground and the radar is measuring rain that is very far above ground level, so it generates false positives. Reliable at-ground-lev

Most rain never reaches the ground and the radar is measuring rain that is very far above ground level, so it generates false positives. Reliable at-ground-level rain measurement has to come from other sources, like automotive sensors, ground weather stations, RF propagation measurements in mobile networks, etc. The downside is that these often have much less coverage than the radar.