Mesoscale and Local Scale Evaluations of Quantitative Precipitation Estimates by Weather Radar Products during a Heavy Rainfall Event

Figure 3

Comparison of 24-hour cumulated rainfall values from radar (PANTHERE) and rain gauges, from Nov. 3 at 21:00 to Nov. 4 at 20:00. (a) Radar rainfall map. The white star indicates the radar position and the white square indicates the HydraVitis network position. Triangle size (MFRN rain gauges) is proportional to the difference between values for radar and rain gauges; inverted triangles represent underestimated values; the regular triangles represent accurate or slightly overestimated values. (b) Scatterplot comparing PANTHERE to rain gauge rainfall data. Points are colored according to the rainfall summed for all pixels between the radar and each rain gauge (source of potential attenuation effect). (c) Zoom of (a) over the HydraVitis local scale rain gauge network. Triangle size (HydraVitis rain gauges) is proportional to the difference between values for radar and rain gauges. (d) Scatterplot comparing PANTHERE to rain gauge rainfall data. ((e) and (f)) The same as (c) and (d), respectively, but using the merged radar-based/MFRN rain gauge ANTILOPE data, instead of PANTHERE radar data.