What is a characteristic of high ZDR values?

High ZDR (Differential Reflectivity) values are indicative of larger droplets or particles within a precipitation system. This measurement compares the horizontal reflectivity to the vertical reflectivity, and when ZDR values are high, it suggests that the distribution of the particles is not uniform and that predominant larger particles such as raindrops are present.

In meteorological terms, large droplets create greater horizontal backscatter than smaller droplets, resulting in higher ZDR values. This is particularly observed in rain showers where larger raindrops contribute significantly to the radar reflectivity. Understanding this characteristic is vital for interpreting precipitation types and intensities, which aid meteorologists in forecasting weather patterns.